Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which...

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Yuan et al. Chin Med (2019) 14:51 https://doi.org/10.1186/s13020-019-0271-8 REVIEW Endophytes from Ginkgo biloba and their secondary metabolites Zhihui Yuan 1,3 , Yun Tian 1 , Fulin He 2,3* and Haiyan Zhou 1* Abstract Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord- ing to the literary about the information of endophytics from Ginkgo biloba, Chaetomium, Aspergillus, Alternaria, Penicillium and Charobacter were isolated from the root, stem, leaf, seed and bark of G. biloba. The endophytics could produce lots of phytochemicals like flavonoids, terpenoids, and other compounds. These compounds have antibac- teria, antioxidation, anticardiovascular, anticancer, antimicrobial and some novel functions. This paper set forth the development of active extracts isolated from endophytes of Ginkgo biloba and will help to improve the resources of Ginkgo biloba to be used in a broader field. Keywords: Ginkgo biloba, Chinese medical plant, Endophytes, Secondary metabolites © The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/ publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. Background Ginkgo biloba (G. biloba) is a deciduous tree belonging to the ginkgo genus, which is also known as Gongsun- shu, etc. G. biloba is one of the most ancient plants on earth dating back more than 200 million years. Com- monly Ginkgo biloba has been used for a medicinal plant and its seeds, leaves and fruits can be used for medicines with biological activities involving antibacteria, antioxi- dation, anticardiovascular and others. However, Ginkgo trees grow slowly and under natural conditions they need more than 20 years from planting to fruiting, which is a restricting point for its development; while its endophyt- ics provide physiological metabolic pathways to pro- duce numerous novel medicinal compounds which have become a hotspot [1]. e endophytics play important roles in the process of host plant growth and systematic evolution [1, 2]. During the whole life, endophytics protect their host from infec- tious diseases and also help to survive in adverse environ- ment [3]. Since the unique relationships between the host plant and associated endophytes, endophytes in G. biloba have been recognized as important sources of a variety of novel secondary metabolites with anticancer, antimicro- bial and other biological activities [4, 5]. Secondary metabolites are the chemical bank which provides a huge quantity of diverse commercial products for human medicines. First report about endophytics is that Stierle et al. isolated Taxomyces andreanae from phloem of Taxus brevifolia, which can produce taxol and related chemicals at the concentration of 24–50 ng/L [6]. From then on, more and more endophytics from phar- maceutical plants, such as Camptotheca acuminata [7], pine [8] and Taxus plants [911] were isolated. As to G. biloba, various endophytics including Chaetomium, Aspergillus, Alternaria, Penicillium and Charobacter were isolated from the root, stem, leaf, seed and bark of G. biloba. ey produce lots of phytochemicals like fla- vonoids, terpenoids, and other compounds [12, 13]. 50% of these isolates showed antimicrobial activities against various pathogens. Some secondary metabolites such as 2-hexenal have been involved in the plant’s defense against pests. ese bioactive metabolites are attractive to developing the commercial prodrugs and agricultural/ industrial production. Most importantly, as a therapeutic drug, G. biloba has no side effects even after long periods of use and its phytopharmaceuticals are readily accessible throughout the world. For better using endophytic and Open Access Chinese Medicine *Correspondence: [email protected]; [email protected] 1 College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China 3 College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425199, China Full list of author information is available at the end of the article

Transcript of Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which...

Page 1: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Yuan et al. Chin Med (2019) 14:51 https://doi.org/10.1186/s13020-019-0271-8

REVIEW

Endophytes from Ginkgo biloba and their secondary metabolitesZhihui Yuan1,3, Yun Tian1, Fulin He2,3* and Haiyan Zhou1*

Abstract

Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord-ing to the literary about the information of endophytics from Ginkgo biloba, Chaetomium, Aspergillus, Alternaria, Penicillium and Charobacter were isolated from the root, stem, leaf, seed and bark of G. biloba. The endophytics could produce lots of phytochemicals like flavonoids, terpenoids, and other compounds. These compounds have antibac-teria, antioxidation, anticardiovascular, anticancer, antimicrobial and some novel functions. This paper set forth the development of active extracts isolated from endophytes of Ginkgo biloba and will help to improve the resources of Ginkgo biloba to be used in a broader field.

Keywords: Ginkgo biloba, Chinese medical plant, Endophytes, Secondary metabolites

© The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creat iveco mmons .org/licen ses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

BackgroundGinkgo biloba (G. biloba) is a deciduous tree belonging to the ginkgo genus, which is also known as Gongsun-shu, etc. G. biloba is one of the most ancient plants on earth dating back more than 200 million years. Com-monly Ginkgo biloba has been used for a medicinal plant and its seeds, leaves and fruits can be used for medicines with biological activities involving antibacteria, antioxi-dation, anticardiovascular and others. However, Ginkgo trees grow slowly and under natural conditions they need more than 20 years from planting to fruiting, which is a restricting point for its development; while its endophyt-ics provide physiological metabolic pathways to pro-duce numerous novel medicinal compounds which have become a hotspot [1].

The endophytics play important roles in the process of host plant growth and systematic evolution [1, 2]. During the whole life, endophytics protect their host from infec-tious diseases and also help to survive in adverse environ-ment [3]. Since the unique relationships between the host plant and associated endophytes, endophytes in G. biloba

have been recognized as important sources of a variety of novel secondary metabolites with anticancer, antimicro-bial and other biological activities [4, 5].

Secondary metabolites are the chemical bank which provides a huge quantity of diverse commercial products for human medicines. First report about endophytics is that Stierle et  al. isolated Taxomyces andreanae from phloem of Taxus brevifolia, which can produce taxol and related chemicals at the concentration of 24–50 ng/L [6]. From then on, more and more endophytics from phar-maceutical plants, such as Camptotheca acuminata [7], pine [8] and Taxus plants [9–11] were isolated. As to G. biloba, various endophytics including Chaetomium, Aspergillus, Alternaria, Penicillium and Charobacter were isolated from the root, stem, leaf, seed and bark of G. biloba. They produce lots of phytochemicals like fla-vonoids, terpenoids, and other compounds [12, 13]. 50% of these isolates showed antimicrobial activities against various pathogens. Some secondary metabolites such as 2-hexenal have been involved in the plant’s defense against pests. These bioactive metabolites are attractive to developing the commercial prodrugs and agricultural/industrial production. Most importantly, as a therapeutic drug, G. biloba has no side effects even after long periods of use and its phytopharmaceuticals are readily accessible throughout the world. For better using endophytic and

Open Access

Chinese Medicine

*Correspondence: [email protected]; [email protected] College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China3 College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425199, ChinaFull list of author information is available at the end of the article

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secondary metabolites from ginkgo trees, we summarize the data previously reported.

Endophytes in Ginkgo bilobaThe whole plant of G. biloba can be used as medicine. In its root, stem, leaf, seed and bark of Ginkgo biloba, vari-ous endophytes have been isolated and their biological function was investigated. The conventional procedure of endophytes isolation is to wash the roots, stems or leaves of ginkgo firstly with 75% alcohol for 3 min, rinse with sterile water 3–5 times, 0.1% mercury sterilized for 2  min, rinsed with sterile water 3–5 times, cut into 0.5  cm × 0.5  cm pieces. The cutting pieces were inocu-lated in PDA medium at 28 °C for 4 days. After purifica-tion, ginkgo endophytes were isolated.

For the endophytic procaryotes, on the total DNA as the template, 27F(AGA GTT TGATC-CTG GGT CAG)/1492R(GGT TAC CTT GTT ACG ACT T) as a primer, 16S rDNA was amplified. For the endophytic eukarya, ITS5 (GAAG TAA AAG TCG TAA CAAGG)/ITS4 (TCC TCC GC TTA TTGA TATGC) as a primer, ITS rDNA was amplified. According to the culturing and molecular analysis between different species, the endo-phytics residing in G. biloba belong to Chaetomium, Aspergillus, Alternaria, Penicillium, Charobacter, etc.

Endophytic procaryotes in Ginkgo bilobaFrom the previous reports, around 50 species of endo-phytic procaryotes were found including Bacillus subtilis, Lactobacillus sp., Fusobacterium sp., Gemella sp., Neisse-ria sp., Pseudomonas sp., Rothia sp., Veillonella sp., etc. Basing on 16S RNA sequence of endophytic procaryotes from previous literatures, the phylogenetic tree was con-structed in Fig. 1. Amongst these procaryotes, the com-munity structure or compositional differences at different taxonomic levels was presented in Fig. 2.

Sphingomonadaceae are a family of the Alphaproteo-bacteria and most abundant in G. biloba. An impor-tant feature is the presence of sphingolipids in the outer membrane of the cell wall [14]. In this family, some spe-cies are phototrophic which may have high nutritional value. The phototrophic bacteria are rich in amino acids, folic acid and vitamins, especially vitamin B12, biotin and coenzyme Q. Some other species are known as the abil-ity to degrade some aromatic compounds which has the interests for environmental remediation [11].

Other abundant species are family Hyphomicrobiaceae, Burkholderiaceae, Methylobacteriaceae, Enterobacte-riaceae, Neisseriaceae and Micrococcaceae. The family Hyphomicrobiaceae is affiliated with Alphaproteobacteria and members of this family are distributed everywhere in soils, freshwater, and also under the marine. This fam-ily is highly diverse morphologically and physiologically.

Most are aerobic chemoheterotrophs and a few can grow anaerobically by denitrification or mixed-acid fermentation.

The Methylobacteriaceae comprises a large family of Alphaproteobacteria and contains three genera including Methylobacterium, Microvirga, and Meganema. Methylo-bacterium species are ubiquitous in the natural environ-ment. Some species induce plant leaf and root nodule formation, and can promote plant growth by production of auxins [15]. Most of Methylobacterium are methylo-trophs and they can use methanol or other one-carbon compounds as energy sources to produce proteins [16]. Otherwise, in Methylobacterium, common fatty acids were contained especially ubiquinone Q-10, a popular dietary supplement.

Family Enterobacteriaceae contains a large number of genera that are biochemically and genetically related to one another. Many of them are pathogens, such as Sal-monella, Shigella or Yersinia, because they produce endo-toxins. Endotoxins reside in the cell wall and when the cell dies and the cell wall disintegrates, endotoxins are released [9].

Family Burkholderiaceae belongs to the order Bur-kholderiales within the class Betaproteobacteria. This family is characterized by the presence of ecologically extremely diverse organisms and contains truly environ-mental saprophytic organisms, phytopathogens, oppor-tunistic pathogens, as well as primary pathogens for humans and animals.

Family Neisseriaceae and Micrococcaceae are wide-spread in soil, subterranean cave silts, sea, glacier silts, sewage, water sludge, aerial surfaces of plants, vegetables, and various animal species and are even more distantly related to the human pathogens.

Endophytic eukarya in Ginkgo bilobaThe phylogenetic tree of endophytic eukarya (Fig.  3) was constructed basing on ITS sequence of roots and leaves of Ginkgo biloba from previous literatures. Amongst these endophytic eukarya, the community structure at different taxonomic levels was presented in Fig. 4.

Amongst eukarya, family Pleosporaceae belongs to sac fungi. The taxonomic relationship of this family to associ-ated genera is still not determined. The classification of Pleosporaceae has been a challenge because of the lack of the importance of morphological characters and ref-erence strains. From the present knowledge, the family Pleosporaceae includes numerous saprobic, opportunistic human and plant pathogenic taxa [17].

Phaeosphaeriaceae is a large and important family of fungi in the order Pleosporales. Species in this fam-ily have a cosmopolitan distribution, and are generally

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nectrotrophic or saprobic on a wide range of plants [18]. This family includes economically important plant patho-gens and previously accommodated 35 sexual and asex-ual genera and comprised more than 300 species with a range of morphological characters [19].

The Xylariaceae are a family of mostly small ascomyce-tous fungi. It is one of the most commonly encountered groups of ascomycetes and is found throughout the tem-perate and tropical regions of the world. They are typi-cally found on wood, seeds, fruits, or plant leaves, some even associated with insect nests. Most decay wood and many are plant pathogens. Phylogenetic analyses suggest that there are two main lineages in this family, Hypoxy-loideae and Xylarioideae [20, 21].

Secondary metabolites of endophytics in Ginkgo bilobaA series of compounds were obtained by fermentation, extraction, and isolation from endophytics of G. biloba, amongst which 115 metabolites were found in the fer-mentation broth of Chaetomium fungi, 44 metabolites were found from Aspergillus, 43 metabolites found in the genus Xylaria. The amount from these three genera accounted for 72% of the secondary metabolites from endophytic procaryotes and 21% were isolated from Fusarium, Alternaria and Penicillium. The number of metabolites of each genus is shown in Fig. 5.

Many metabolic products from G. biloba have strong inhibitory effects on pathogenic bacteria Staphylococcus

Fig. 1 The phylogenetic tree of endophytic procaryotes from soil, root and leaf of Ginkgo biloba. 50 most abundant OTUs are used for display. If a number appears before the species name, it represents the total number of sequences of this OTU. If it is a graph, the graph size represents the relative abundance (percentage), and the black dot on the branch represents the bootstrap confidence greater than 95%

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aureus, Enterococcus faecalis, and Pseudomonas aerugi-nosa. The secondary metabolites of Ginkgo, such as fla-vonoids and ginkgolides, are drugs or prodrugs used in

the treatment of peripheral arterial diseases, neurologi-cal disorders, sclerosis of cerebral arteries, and cerebral ageing.

Fig. 2 The community structure at different taxonomic levels. (1) The community structure at different phylums; (2) the community structure at different classes; (3) the community structure at different families; (4) the community structure at different genus. The percentage in parentheses indicates that only the group with the average abundance greater than this ratio is listed. All other groups are classified in others

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Secondary metabolites of ChaetomiumChaetomium is the largest type of endophytic fungus from G. biloba and its secondary metabolites are bio-logically diverse. Chaetomium globosum is one of main endophytics. A total of 115 metabolites were isolated from the fermentation broth of Chaetomium globosum (see Fig.  6 and Table  1). Among them, chaetoglobosin A, chaetoglobosin C, chaetoglobosin E, chaetoglobo-sin G, chaetoglobosin Vb, chaetomugilin A, chaetomu-gilin D and ergosterol peroxide (peroxyergosterol; 5α,

8α-peroxy-(22E, 24R)-ergot-6,22-diene-3β-ol), which has been reported in many literatures, may be a research hotspot. Among these compounds, chaetomugilin A, chaetomugilin D, chaetoglobosin A and chaetoglobosin C have strong cytotoxic activity [22].

Chaetomugilin A and D, both are a kind of azaphilone isolated from Chaetomium globosum and has been shown to exhibit inhibitory activity against the brine shrimp (Artemia salina) and Mucor miehei [22]. Chaetomugilide A isolated from Chaetomium globosum

Fig. 3 The phylogenetic tree of endophytic eukarya from soil, root and leaf of Ginkgo biloba. 50 most abundant OTUs are used for display. If a number appears before the species name, it represents the total number of sequences of this OTU. If it is a graph, the graph size represents the relative abundance (percentage), and the black dot on the branch represents the bootstrap confidence greater than 95%

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TY1 has strong activity against hepatoma cell HepG-2, and the IC50 value is only 1.7  μmol/L [23]. Chaetoglo-bosin A is a Chaetomium secretion with the anticancer activity in vitro [24] and it derivates into other bilobalide

compounds MBJ-0038, MBJ-0039, and MBJ-0040 [25]. Chaetoglobosin E is a cytochalasan alkaloid found in Chaetomium globosum and Chaetomium subaffine. It is a cytochalasan alkaloid, a member of indoles, a macrocycle

Fig. 4 The community structure at different taxonomic levels. (1) The community structure at different phylums; (2) The community structure at different classes; (3) The community structure at different families; (4) the community structure at different genus. The percentage in parentheses indicates that only the group with the average abundance greater than this ratio is listed. All other groups are classified in others

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and a secondary alpha-hydroxy ketone. It has a role as a Chaetomium metabolite and an antineoplastic agent.

One new cytochalasan alkaloid, chaetoglobosin V(b), together with two structurally related known com-pounds, chaetoglobosin V and chaetoglobosin G, were isolated from the ethyl acetate extract of a culture of the endophytic fungus Chaetomium globosum, associated with the leaves of G. biloba tree. The structures of the isolated compounds were elucidated by spectroscopic methods including 1D and 2D NMR and mass spec-trometry. The absolute conStruration of chaetoglobo-sin V(b) was established by means of electronic circular dichroism (CD) spectroscopy. The correlation between compounds was demonstrated by a biomimetic trans-formation of chaetoglobosin G under mild conditions

in chaetoglobosins V and V(b). The isolated metabolites were tested against some phytopathogens [22].

The compound flavipin isolated from Chaetomium globosum CDW 7 has strong antioxidant activity [23]. Chaetomium globosum ZY-22 could produce two poly-hydroxylated steroids [24] and two other important com-pounds bilobalide, ginkgolides are to be beneficial to human health [26]. Bilobalide has neuroprotective effects [27] as well as inducing the liver enzymes CYP3A1 and 1A2 which may be partially responsible for interactions between gingko and other herbal medicines or pharma-ceutical drugs; while ginkgolide has been investigated for its potential to reducing migraine frequency [28]. Ergosterol peroxide (5α,8α-epidioxy-22E-ergosta-6,22-dien-3β-ol) is a steroid derivative. It has been reported to

Fig. 5 a The metabolite quantity of some major endophytics in Ginkgo biloba; b the metabolite quantity of some minor endophytics in Ginkgo biloba

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exhibit immune- suppressive, anti-inflammatory, antivi-ral, trypanocidal and antitumor activities in vitro [27].

Secondary metabolites of AspergillusAspergillus is the dominant flora of endophytic fungi of G. biloba and was isolated from different parts of G. biloba which cultivated in various areas. A total of 44 metabolites were found in the fermentation broth of Aspergillus (see Table  2), among which 3-hydroxy-ter-phenyl, 4,5-dimethoxycandidusin A, prenylcandidusin C, and prenylterphenyllin were studied most popularly. For 4″-Deoxycandidusin A, 4″-deoxytripentin, 4′-deoxy-3-hydroxyrisperidone, aspergiloid A, coumarin A, and tribenzine, three articles reported about each compound, respectively. Among these metabolites, 3-hydroxy-ter-phenyl and 4″-deoxycandidusin A, 4″-deoxytripentin have strong inhibitory activity against neuraminidase [29]; 4′-deoxy-3-hydroxytripentin, 3-hydroxy-terphenyl, 4″-deoxycandidusin has moderate activity against human nasopharyngeal carcinoma cell KB, human gastric can-cer cell SGC-7901, human colon cancer cell SW1116 and human lung cancer cell A549 [30].

Secondary metabolites of AlternariaAlternaria is a very common fungus. It is an important pathogen for plants, human and animal diseases. It is a biological resource with great application potential as well. According to the existing literatures, 17 metabolites were isolated from the fermentation products of Alter-naria (see Table  3). Alterperylenol inhibits human tel-omerase activity. Alterperylenol can inhibit telomerase

activity (IC50 = 30 μM), but altertoxin I (dihydroalterper-ylenol), a structurally related compound, did not affect activity at 1 mM. Moreover, alterperylenol and altertoxin I show phytotoxic and antifungal activity [31].

In these metabolites, botulinum toxin and botuli-num toxin II have strong cytotoxic activity. When the concentration is 10  μg/mL, the mortality rate of brine shrimp is 68.9% and 73.6%, respectively [32]. Alternaria No. 28 could produce cytotoxic metabolites which have inhibitory potential against some different protein kinases [7].

Secondary metabolites of PenicilliumPenicillium is widely distributed in nature and generally has a strong biological activity. According to the exist-ing literatures, 17 secondary metabolites were found from the fermentation products of Penicillium sp. in G. biloba (Table 4), and some metabolites were biologically active. The compound arcacic acid is isolated from the fermentation broth of Penicillium commune, which has antibacterial activity and has inhibition activities on 12 kinds of plant pathogens, especially has strong inhibi-tory activity against Bacillus licheniformis and Sclerotinia sclerotiorum, and the IC50 values are only 39.28 mg/L and 60.62 mg/L [33].

The compounds adenosine, deoxyadenosine and ade-nine which were isolated from the fermentation prod-uct of Penicillium sp. YY-20 have a strong scavenging capacity for DPPH free radical [34]. Wu isolated Penicil-lium cataractum SYPF 7131 from 58 endophytic fungi obtained from the leaves, stems and roots of G. biloba.

Fig. 6 The quantity of different kinds of metabolites from Chaetomium

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Tabl

e 1

Seco

ndar

y m

etab

olit

es o

f Cha

etom

ium

in G

inkg

o bi

loba

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

1(2

2E, 2

4R)-

ergo

sta-

7,22

-die

ne-

3β,5

α,6β

-trio

l/cer

evis

tero

l51

6-37

-0Ch

aeto

miu

m g

lobo

sum

[33]

2(2

2E, 2

4R)-

ergo

sta-

7,22

-die

ne-

3β,5

α,6β

,9α-

tetr

aol

8819

1-06

-4Ch

aeto

miu

m g

lobo

sum

[44]

3(7

Z,11

E)-7

,11-

Hex

adec

adie

n-1-

yl

acet

ate

5304

2-79

-8Ch

aeto

miu

m g

lobo

sum

N

o. 1

6Pe

stic

ide

[45]

4(E

,E)-2

,4-D

ecad

iena

l25

152-

84-5

Chae

tom

ium

glo

bosu

m

No.

16

Food

_add

itive

; fra

gran

ce[4

5]

5(Z

)-9-H

exad

ecen

oic

acid

, met

hyl

este

r11

20-2

5-8

Chae

tom

ium

glo

bosu

m

No.

16

[45]

6(Z

,Z)-9

,12-

Oct

adec

adie

noic

aci

d60

-33-

3Ch

aeto

miu

m g

lobo

sum

N

o. 1

6Bi

osyn

thes

is o

f pro

stag

land

ins

and

cell

mem

bran

es[4

5]

71-

(3-A

cety

l-2,2

-di

met

hylc

yclo

prop

yl)-2

-met

hyl-1

-pr

opan

one

7714

2-84

-8Ch

aeto

miu

m g

lobo

sum

T1

6[4

9]

81-

(3-M

etho

xy-2

-pyr

azin

yl)-2

-met

hyl-

1-pr

opan

one

9861

8-81

-6Ch

aeto

miu

m g

lobo

sum

T1

6[4

6]

91,

3-D

ioxo

lane

, 2-m

etho

xy19

693-

75-5

Chae

tom

ium

glo

bosu

m

T16

[46]

101-

Eico

sene

3452

-07-

1Ch

aeto

miu

m g

lobo

sum

N

o. 1

6[4

5]

111-

Trim

ethy

lsily

l met

hano

l32

19-6

3-4

Chae

tom

ium

glo

bosu

m

T16

[46]

122,

3,4-

Trim

ethy

l-5,7

-dih

ydro

xy-2

,3-d

i-hy

drob

enzo

fura

n18

2458

4-79

-3Ch

aeto

miu

m g

lobo

sum

[47]

132,

4,5-

Trim

ethy

l-1,3

-dio

xola

ne32

99-3

2-9

Chae

tom

ium

glo

bosu

m

T16

Flav

ors

[46]

142,

4-D

ecad

iena

l23

63-8

8-4

Chae

tom

ium

glo

bosu

m

No.

16Fo

od a

dditi

ve[2

0, 2

1]

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Tabl

e 1

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

152′

-O-M

ethy

lade

nosi

ne21

40-7

9-6

Chae

tom

ium

glo

bosu

mIn

hibi

tion

of v

acci

nia

viru

s gr

owth

[47]

162′

-Deo

xyad

enos

ine

958-

09-8

Chae

tom

ium

glo

bosu

mA

nti-t

umor

and

ant

ivira

l nu

cleo

side

dru

gs (c

ladr

ibin

e)[4

4]

1720

-Dih

ydro

chae

togl

obos

in A

1495

60-9

8-5

Chae

tom

ium

glo

bosu

m[4

7]

1821

Met

hoxy

-Cha

etog

lobo

sin

FCh

aeto

miu

m g

lobo

sum

[47]

182-

Cycl

ohex

yl-h

ex-5

-en-

2-ol

9592

61-1

7-7

Chae

tom

ium

glo

bosu

m

T16

[46]

192-

Ethy

l-5-p

ropy

lphe

nol

7238

6-20

-0Ch

aeto

miu

m g

lobo

sum

T1

6[4

6]

202-

Met

hyl-5

-pro

pyl-2

,4-d

ihyd

ro-

3H-p

yraz

ol-3

-one

3127

2-04

-5Ch

aeto

miu

m g

lobo

sum

T1

6[4

6]

212-

Oct

yl-c

yclo

prop

aneo

ctan

al56

196-

06-6

Chae

tom

ium

glo

bosu

m

No.

16[4

5]

223,

4-D

ihyd

roxy

phen

yl a

cetic

aci

d10

2-32

-9Ch

aeto

miu

m g

lobo

sum

A m

etab

olite

of d

opam

ine,

Cy

topl

asm

, Enc

epha

litis

, H

ypot

hyro

idis

m, A

lzhe

imer

’s di

seas

e, C

olor

ecta

l can

cer

[47]

233-

Met

hylo

rsel

linic

aci

d47

07-4

6-4

Chae

tom

ium

glo

bosu

m

ZY-2

2N

euro

prot

ectiv

e A

ctiv

ity[4

6]

244-

Am

inop

heny

lace

tic a

cid/

p-am

i-no

phen

ylac

etic

aci

d/4-

amin

ophe

-ny

lace

tic a

cid

1197

-55-

3Ch

aeto

miu

m g

lobo

sum

Ant

i-infl

amm

ator

y In

hibi

tion

colit

is[4

7]

254-

Met

hyl-1

-hep

ten-

5-on

e26

118-

97-8

Chae

tom

ium

glo

bosu

m[4

6]

Page 11: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 11 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 1

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

265-

(hyd

roxy

met

hyl)-

1H-p

yrro

le-

2-ca

rbal

dehy

de67

350-

50-9

Chae

tom

ium

glo

bosu

mH

apte

n, p

rodu

ces

adva

nced

gl

ycat

ion

end-

prod

ucts

(A

GEs

)

[47]

275′

-Epi

chae

tovi

rdin

A13

0867

1-17

-1Ch

aeto

miu

m g

lobo

sum

N

o. 1

2[4

5]

285′

-Deo

xy-5′-m

ethy

lam

ino-

aden

osin

eN

o ca

s no

.Ch

aeto

miu

m g

lobo

sum

[47]

299(

11)-

dehy

oerg

oste

rol p

erox

ide

8636

3-50

-0Ch

aeto

miu

m g

lobo

sum

ZY

-22

[44]

309,

12-O

ctad

ecad

ien-

1-ol

1577

-52-

2Ch

aeto

miu

m g

lobo

sum

N

o. 1

6[4

5]

31A

ceta

ldeh

yde,

die

thyl

ace

tal

105-

57-7

Chae

tom

ium

glo

bosu

m

T16

Use

d in

frui

t, ru

m a

nd w

hisk

y fla

vour

[46]

32A

deno

sine

58-6

1-7

Chae

tom

ium

glo

bosu

m

ZY-2

2Va

sodi

lato

ry, a

nti-a

rrhy

thm

ic

and

anal

gesi

c ac

tiviti

es

aden

osin

e is

an

aden

osin

e re

cept

or a

goni

st

[46]

33A

llant

oin

97-5

9-6

Chae

tom

ium

glo

bosu

mH

ealin

g, s

ooth

ing,

and

ant

i-irr

i-ta

ting

prop

ertie

s an

ti-ac

ne

prod

ucts

, sun

car

e pr

oduc

ts,

and

clar

ifyin

g lo

tions

[48]

34al

pha-

Met

hyls

tyre

ne98

-83-

9Ch

aeto

miu

m g

lobo

sum

Mem

bran

e ad

hesi

ves

and

seal

-an

t che

mic

als

[48]

35A

nthr

anili

c ac

id11

8-92

-3Ch

aeto

miu

m g

lobo

sum

M

X-05

10A

wat

er-s

olub

le v

itam

in[3

3]

36Be

nzen

eace

tic a

cid

103-

82-2

Chae

tom

ium

glo

bosu

m

No.

16

Use

d in

the

man

ufac

ture

of

pen

icill

in a

nd b

enda

zol

[45]

37Be

nzen

eace

tic a

cid,

met

hyl e

ster

101-

41-7

Chae

tom

ium

glo

bosu

m

No.

16

Use

d in

the

man

ufac

ture

of

atro

pine

[45]

38Be

nzen

eeth

anol

/phe

nyle

thyl

al

coho

l60

-12-

8Ch

aeto

miu

m g

lobo

sum

Esse

nce

[45]

Page 12: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 12 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 1

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

39Bu

tyra

ldeh

yde,

4-p

heny

l18

328-

11-5

Chae

tom

ium

glo

bosu

m

T16

[46]

40Ce

rebr

osid

e B

8864

2-46

-0Ch

aeto

miu

m g

lobo

sum

ZY

-22

[46]

41Ce

rebr

osid

e C

9867

7-33

-9Ch

aeto

miu

m g

lobo

sum

ZY

-22

[46]

42C

haet

oglo

bosi

n A

5033

5-03

-0Ch

aeto

miu

m g

lobo

sum

[44,

49]

43C

haet

oglo

bosi

n B

5033

5-04

-1Ch

aeto

miu

m g

lobo

sum

C

DW

7[4

8]

44C

haet

oglo

bosi

n C

5064

5-76

-6Ch

aeto

miu

m g

lobo

sum

[26,

28]

45C

haet

oglo

bosi

n D

5594

5-73

-8Ch

aeto

miu

m g

lobo

sum

[49]

46C

haet

oglo

bosi

n E

5594

5-74

-9Ch

aeto

miu

m g

lobo

sum

(C

DW

7)[4

9]

47C

haet

oglo

bosi

n F

5594

5-75

-0Ch

aeto

miu

m g

lobo

sum

(C

DW

7)[4

7]

48C

haet

oglo

bosi

n Fa

1599

426-

06-8

Chae

tom

ium

glo

bosu

m[4

7]

Page 13: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 13 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 1

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

49C

haet

oglo

bosi

n Fe

x14

9457

-95-

4Ch

aeto

miu

m g

lobo

sum

[47]

50C

haet

oglo

bosi

n G

6577

3-98

-0Ch

aeto

miu

m g

lobo

sum

(N

M00

66)

[47]

51C

haet

oglo

bosi

n R

7779

39-3

0-7

Chae

tom

ium

glo

bosu

m[4

9]

52C

haet

oglo

bosi

n V

1399

682-

37-1

Chae

tom

ium

glo

bosu

m[4

7]

53C

haet

oglo

bosi

n Vb

1399

690-

75-5

Chae

tom

ium

glo

bosu

m

(CD

W7)

[48]

54C

haet

oglo

bosi

n Y

1608

108-

89-9

Chae

tom

ium

glo

bosu

m[4

8]

55C

haet

omug

ilide

A14

1813

8-71

-2Ch

aeto

miu

m g

lobo

sum

[45,

47]

56C

haet

omug

ilide

B14

3397

6-48

-7Ch

aeto

miu

m g

lobo

sum

[45]

57C

haet

omug

ilide

C14

1813

8-70

-1Ch

aeto

miu

m g

lobo

sum

[45,

47]

58C

haet

omug

ilin

A10

4164

0-66

-7Ch

aeto

miu

m g

lobo

sum

[45]

Page 14: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 14 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 1

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

59C

haet

omug

ilin

D10

9808

1-38

-9Ch

aeto

miu

m g

lobo

sum

[25]

60C

haet

omug

ilin

I11

8784

8-00

-5Ch

aeto

miu

m g

lobo

sum

[25]

61C

haet

omug

ilin

J11

8784

8-01

-6Ch

aeto

miu

m g

lobo

sum

[25]

62C

haet

omug

ilin

O11

8784

8-06

-1Ch

aeto

miu

m g

lobo

sum

[25]

63C

haet

omug

ilin

Q13

1972

9-85

-5Ch

aeto

miu

m g

lobo

sum

[25]

64C

haet

omug

ilin

S13

9909

3-77

-6Ch

aeto

miu

m g

lobo

sum

[25]

65C

haet

oviri

din

C12

8230

-02-

4Ch

aeto

miu

m g

lobo

sum

[15]

66C

haet

oviri

din

D12

8230

-04-

6Ch

aeto

miu

m g

lobo

sum

[33]

67C

haet

oviri

din

E11

7887

5-15

-4Ch

aeto

miu

m g

lobo

sum

[33]

68Cy

clo-

(Phe

-Gly

)50

37-7

5-2

Chae

tom

ium

glo

bosu

m[3

3]

Page 15: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 15 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 1

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

69Cy

clop

enta

deca

ne29

5-48

-7Ch

aeto

miu

m g

lobo

sum

N

o.16

[45]

70D

imet

hyl p

htha

late

131-

11-3

Chae

tom

ium

glo

bosu

m

No.

16U

sed

in p

last

ics,

inse

ct

repe

llent

s, sa

fety

gla

ss, a

nd

lacq

uer c

oatin

gs

[45]

71Ep

imw

soko

rwno

ne A

1073

-96-

7Ch

aeto

miu

m g

lobo

sum

[33]

72Er

gost

a-4

6,8,

22-t

etra

en-3

-one

/er

gost

a-4,

6,8,

22-t

etra

en-3

-one

1947

21-7

5-0

Chae

tom

ium

glo

bosu

m

(ZY-

22)

[33]

73Er

gost

erol

57-8

7-4

Chae

tom

ium

glo

bosu

mFo

rmat

ion

of v

itam

in D

2[4

9]

74Er

gost

erol

per

oxid

e (5

α,8α

-epi

-di

oxy-

(22E

,24R

) -er

gost

a-6,

22-

dien

-3β-

ol)

2061

-64-

5Ch

aeto

miu

m g

lobo

sum

An

antin

eopl

astic

age

nt, a

n an

timyc

obac

teria

l dru

g an

d a

tryp

anoc

idal

dru

g

[33]

75Et

hano

ic a

cid

64-1

9-7

Chae

tom

ium

glo

bosu

m

T16

Food

add

itive

, and

in p

etro

-le

um p

rodu

ctio

n[4

6]

76Et

hyl 1

3-m

ethy

l-tet

rade

cano

ate

6431

7-63

-1Ch

aeto

miu

m g

lobo

sum

N

o. 1

6[4

5]

77Et

hyl 2

-hep

teno

ate

2351

-88-

4Ch

aeto

miu

m g

lobo

sum

T1

6[4

5]

Page 16: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 16 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 1

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

78Et

hylid

ene

acet

ate

542-

10-9

Chae

tom

ium

glo

bosu

m

T16

[45]

79fla

vipi

n (1

,2-b

enze

nedi

carb

oxal

de-

hyde

-3,4

,5-t

rihyd

roxy

-6-m

ethy

l)48

3-53

-4Ch

aeto

miu

m g

lobo

sum

C

DW

7A

ntio

xida

nt fu

ngic

ides

[22]

80Fu

mig

acla

vine

B68

79-9

3-2

Chae

tom

ium

glo

bosu

m[4

7]

81Fu

mitr

emor

gin

C11

8974

-02-

0Ch

aeto

miu

m g

lobo

sum

(N

M00

66)

A m

ycot

oxin

and

a b

reas

t ca

ncer

resi

stan

ce p

rote

in

inhi

bito

r

[33]

82G

lioto

xin

67-9

9-2

Chae

tom

ium

glo

bosu

m

(NM

0066

)A

myc

otox

in, a

n im

mun

osup

-pr

essi

ve a

gent

, an

prot

ein

farn

esyl

tran

sfer

ase

inhi

bito

r, a

prot

easo

me

inhi

bito

r and

an

ant

ifung

al a

gent

[33]

83G

lobo

ster

ol11

9331

9-70

-8Ch

aeto

miu

m g

lobo

sum

ZY

-22

[44]

84G

lyce

rol f

orm

al54

64-2

8-8

Chae

tom

ium

glo

bosu

m

T16

[46]

85H

exad

ecan

e54

4-76

-3Ch

aeto

miu

m g

lobo

sum

Use

d as

a s

olve

nt a

nd a

n in

gred

ient

in g

asol

ine

and

dies

el a

nd je

t fue

ls

[45]

86H

exad

ecan

oic

acid

, eth

yl e

ster

628-

97-7

Chae

tom

ium

glo

bosu

m

No.

16

Use

d as

sof

tene

r, lu

bric

ant,

food

add

itive

[45]

87H

exad

ecan

oic

acid

, met

hyl e

ster

112-

39-0

Chae

tom

ium

glo

bosu

m

No.

16

Use

d as

inte

rmed

iate

of

emul

sifie

r, w

ettin

g ag

ent,

stab

ilize

r and

pla

stic

izer

[45]

88In

dole

-3- c

arbo

xylic

aci

d77

1-50

-6Ch

aeto

miu

m g

lobo

sum

ZY

-22

Use

d fo

r syn

thes

is o

f to

rise

tron

and

ant

ivira

l dru

gs[3

3]

89In

dole

-3-a

cetic

aci

d87

-51-

4Ch

aeto

miu

m g

lobo

sum

Plan

t gro

wth

stim

ulat

ing

horm

one

[33]

90Is

open

tyl a

lcoh

ol, a

ceta

te12

3-92

-2Ch

aeto

miu

m g

lobo

sum

T1

6U

sed

as a

sol

vent

and

pre

para

-tio

n of

a v

arie

ty o

f flav

or

food

flav

or

[22]

Page 17: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 17 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 1

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

91La

ctic

aci

d50

-21-

5Ch

aeto

miu

m g

lobo

sum

T1

6U

sed

to m

ake

som

e pl

astic

iz-

ers,

adhe

sive

s, ph

arm

aceu

-tic

als

and

salts

, use

d in

the

leat

her t

anni

ng in

dust

ry a

nd

as a

sol

vent

[46]

92La

ctic

aci

d, 2

-met

hyl-,

ethy

l est

er80

-55-

7Ch

aeto

miu

m g

lobo

sum

T1

6[4

6]

93M

alto

l11

8-71

-8Ch

aeto

miu

m g

lobo

sum

M

X-05

10Fo

od a

dditi

ve[3

3]

94M

anni

tol

87-7

8-5

Chae

tom

ium

glo

bosu

mU

sed

as a

n os

mot

ic d

iure

tic[3

3]

95M

ethy

l 13-

met

hylte

trad

ecan

oate

5129

-59-

9Ch

aeto

miu

m g

lobo

sum

N

o. 1

6[4

5]

96M

ethy

l 9,1

2-he

ptad

ecad

ieno

ate

1562

0-59

-4Ch

aeto

miu

m g

lobo

sum

N

o. 1

6[4

5]

97M

ethy

l vin

ylca

rbin

ol59

8-32

-3Ch

aeto

miu

m g

lobo

sum

Food

add

itive

[46]

98M

ethy

lthio

glio

toxi

n74

149-

38-5

Chae

tom

ium

glo

bosu

m

(NM

0066

)[3

3]

99o-

Coum

aric

aci

d58

3-17

-5Ch

aeto

miu

m g

lobo

sum

ZY

-22

An

antio

xida

nt a

nd is

bel

ieve

d to

redu

ce th

e ris

k of

sto

mac

h ca

ncer

by

redu

cing

the

form

atio

n of

car

cino

geni

c ni

tros

amin

es

[33]

100

Oct

anoi

c ac

id, m

ethy

l est

er11

1-11

-5Ch

aeto

miu

m g

lobo

sum

N

o. 1

6Fo

od a

dditi

ve[4

5]

101

Pent

adec

ane

629-

62-9

Chae

tom

ium

glo

bosu

m

No.

16

Use

d as

a s

olve

nt a

nd in

som

e ho

useh

old

pest

icid

es[4

5]

102

Pent

adec

anoi

c ac

id, m

ethy

l est

er71

32-6

4-1

Chae

tom

ium

glo

bosu

m

No.

16

Fuel

s an

d fu

el a

dditi

ves

Inte

rmed

iate

s, pe

stic

ide

[45]

103

p-H

ydro

xybe

nzoi

c ac

id99

-96-

7Ch

aeto

miu

m g

lobo

sum

Use

d as

pre

serv

ativ

es, f

ungi

-ci

des

[33]

104

Pseu

rotin

A58

523-

30-1

Chae

tom

ium

glo

bosu

m

(NM

0066

)A

n az

aspi

ro c

ompo

und,

an

oxas

piro

com

poun

d an

d a

lact

am

[33]

Page 18: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 18 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 1

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

105

Que

rcet

in11

7-39

-5Ch

aeto

miu

m g

lobo

sum

G

CZX

015

Com

bine

d w

ith c

hem

o-th

erap

eutic

dru

gs, p

rodu

ces

anti-

infla

mm

ator

y an

d an

ti-al

lerg

y eff

ects

[33]

106

Squa

lene

111-

02-4

Chae

tom

ium

glo

bosu

m

(NM

0066

)In

vest

igat

ed a

s an

adj

unct

ive

canc

er th

erap

y, a

lso

used

as

cosm

etic

s an

d di

etar

y su

p-pl

emen

t

[33]

107

S-Te

trac

hlor

oeth

ane

79-3

4-5

Chae

tom

ium

glo

bosu

m

T16

Use

d to

mak

e pa

int,

varn

ish

and

rust

rem

over

s, as

a

solv

ent a

nd a

s an

ingr

edie

nt

in p

estic

ides

[45]

108

Succ

inic

aci

d11

0-15

-6Ch

aeto

miu

m g

lobo

sum

A ra

diat

ion

prot

ectiv

e ag

ent,

an a

nti-u

lcer

dru

g[3

3]

109

Tetr

adec

ane

629-

59-4

Chae

tom

ium

glo

bosu

m

No.

16U

sed

as a

sol

vent

and

som

e pe

stic

ide

spra

ys[4

5]

110

Thym

ine

65-7

1-4

Chae

tom

ium

glo

bosu

m

ZY-2

2A

pyr

imid

ine

nucl

eoba

se a

nd a

py

rimid

one

[33]

111

Trid

ecan

e62

9-50

-5Ch

aeto

miu

m g

lobo

sum

N

o. 1

6U

sed

as a

sol

vent

and

as

an

ingr

edie

nt in

gas

olin

e an

d di

esel

and

jet f

uel

[45]

112

Trie

thyl

ene

glyc

ol m

onom

ethy

l et

her a

ceta

te36

10-2

7-3

Chae

tom

ium

glo

bosu

m

T16

[46]

113

Ura

cil

66-2

2-8

Chae

tom

ium

glo

bosu

m

ZY-2

2U

se in

the

body

to h

elp

syn-

thes

is o

f man

y en

zym

es, a

nd

the

bios

ynth

esis

of p

olys

ac-

char

ides

and

the

tran

spor

ta-

tion

of s

ugar

s co

ntai

ning

al

dehy

des

[49]

114

α-G

uaje

ne36

91-1

2-1

Chae

tom

ium

glo

bosu

m

No.

16

[45]

Page 19: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 19 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 2

Seco

ndar

y m

etab

olit

es o

f Asp

ergi

lus i

n G

inkg

o bi

loba

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

13-

Hyd

roxy

terp

heny

llin

6616

3-76

-6As

perg

illus

sp.

Indu

ces

apop

tosi

s an

d S

phas

e ar

rest

in

hum

an o

varia

n ca

rcin

oma

cells

[28,

50]

24″

-Deo

xyca

ndid

usin

A13

5454

9-88

-4As

perg

illus

sp.

[51,

52]

34″

-Deo

xyte

rphe

nylli

n59

904-

04-0

Aspe

rgill

us s

p.[5

0]

44,

5-D

imet

hoxy

cand

idus

in A

/3,4

-di

met

hoxy

cand

idus

in A

1354

549-

89-5

Aspe

rgill

us s

p.[5

0, 5

2]

54′

-Deo

xy- 3

-hyd

roxy

terp

heny

llin

1296

205-

84-9

Aspe

rgill

us s

p.[5

0, 5

2]

64′

’-Deo

xy-5′-d

esm

ethy

l-ter

phen

yllin

1354

549-

87-3

Aspe

rgill

us s

p.[5

0]

74′

’-Deo

xypr

enyl

terp

heny

llin

9591

24-8

7-9

Aspe

rgill

us s

p. IF

B-YX

SPo

tent

ial a

ntic

ance

r lea

d m

olec

ules

[50]

84-

Hyd

roxy

-3-(3

′-met

hyl-2′-b

uten

yl)

benz

oic

acid

1138

-41-

6As

perg

illus

sp.

YXf

3Sh

ow p

oten

t inh

ibiti

on o

f HLE

[50]

95′

-Des

met

hylte

rphe

nylli

n12

9948

5-87

-2As

perg

illus

sp.

An

alph

a-gl

ucos

idas

e in

hibi

tor

[50]

10A

ltern

ario

l64

1-38

-3As

perg

illus

sp.

YXf

3A

n ch

olin

este

rase

inhi

bito

r and

a

myc

otox

in[5

2]

Page 20: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 20 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 2

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

11A

ltern

ario

l mon

omet

hyl e

ther

/al

tern

ario

l-4-m

ethy

l eth

er23

452-

05-3

Aspe

rgill

us s

p. Y

Xf3

An

antif

unga

l age

nt[5

2]

12A

sper

gilo

id A

1354

549-

91-9

Aspe

rgill

us s

p.[5

0]

13A

sper

gilo

id B

1354

549-

92-0

Aspe

rgill

us s

p.[5

0]

14A

sper

gilo

id C

1354

549-

93-1

Aspe

rgill

us s

p.[5

0]

15A

sper

gilo

id D

1354

549-

94-2

Aspe

rgill

us s

p.[5

0]

16A

sper

gilo

id E

1579

256-

33-9

Aspe

rgill

us s

p. Y

Xf3

[52]

17A

sper

gilo

id F

1579

256-

35-1

Aspe

rgill

us s

p. Y

Xf3

[52]

18A

sper

gilo

id G

1579

256-

37-3

Aspe

rgill

us s

p. Y

Xf3

[52]

Page 21: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 21 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 2

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

19A

sper

gilo

id H

1579

256-

39-5

Aspe

rgill

us s

p. Y

Xf3

[52]

20A

sper

gilo

id I

1887

750-

59-5

Aspe

rgill

us s

p. Y

Xf3

Ant

i-can

cer a

nd in

hibi

tion

of p

lant

pa

thog

ens

[50]

21Ca

ndid

usin

A81

474-

59-1

Aspe

rgill

us s

p.[5

0]

22Ca

ndid

usin

C/4″-

met

hoxy

cand

idus

in

A26

7007

-58-

9As

perg

illus

sp.

[50]

23C

hlor

flavo

nin

2336

3-64

-6As

perg

illus

sp.

(str

ain

no. Y

Xf3)

An

antif

unga

l age

nt[5

0]

24C

hlor

flavo

nin

A14

4305

5-96

-6As

perg

illus

sp.

(str

ain

no. Y

Xf3)

An

antif

unga

l age

nt[5

0]

25Cy

clo-

(L-L

eu-L

-Trp

)15

136-

34-2

Aspe

rgill

us s

p. Y

Xf3

[50]

26G

inkg

olid

e B

1529

1-77

-7As

perg

illus

.fum

igat

us v

ar.

fum

igat

us F

G 0

5G

inkg

olid

e B

prot

ects

hum

an u

mbi

lical

ve

in e

ndot

helia

l cel

ls a

gain

st x

enob

i-ot

ic in

jurie

s vi

a PX

R ac

tivat

ion

[52]

27G

inkg

olid

e C

1529

1-76

-6As

perg

illus

[32]

28Pr

enyl

cand

idus

in B

1297

472-

19-5

Aspe

rgill

us s

p. IF

B-YX

SA

n an

tineo

plas

tic a

gent

[53]

29Pr

enyl

cand

idus

in C

1297

472-

20-8

Aspe

rgill

us s

p.A

n an

tineo

plas

tic a

gent

[53]

30Pr

enyl

terp

heny

llin

9591

24-8

5-7

Aspe

rgill

us s

p.Ex

hibi

ts c

ytot

oxic

act

ivity

, an

antin

eo-

plas

tic a

gent

[53]

Page 22: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 22 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 2

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

31Pr

enyl

terp

heny

llin

B12

9747

2-16

-2As

perg

illus

sp.

IFB-

YXS

Exhi

bits

cyt

otox

ic a

ctiv

ity, a

n an

tineo

-pl

astic

age

nt[5

3]

32Sp

haer

opsi

din

A38

991-

80-9

Aspe

rgill

us s

p. Y

Xf3

larv

icid

al a

nd b

iting

det

erre

nts

agai

nst

Aede

s aeg

ypti

[50]

33Sp

haer

opsi

din

B39

022-

38-3

Aspe

rgill

us s

p. Y

Xf3

[50]

34Te

rphe

nolid

e13

5454

9-90

-8As

perg

illus

sp.

[50]

35Te

rphe

nylli

n52

452-

60-5

Aspe

rgill

us s

p.A

myc

otox

in[5

0]

36Te

rrei

nol

6690

73-6

7-0

Aspe

rgill

us s

p. Y

Xf3

[31]

37Xa

ntho

asci

n61

391-

08-0

Aspe

rgill

us s

p. IF

B-YX

S[5

3]

38Pr

enyl

terp

heny

llin

D20

7997

9-59

-0As

perg

illus

sp.

IFB-

YXS

Ant

ibac

teria

l act

iviti

es, a

nti-p

hyto

path

o-ge

nic

activ

ities

[31]

39Pr

enyl

terp

heny

llin

E20

7997

9-60

-3As

perg

illus

sp.

IFB-

YXS

Ant

ibac

teria

l act

iviti

es, a

nti-p

hyto

path

o-ge

nic

activ

ities

[31]

402′

-O-M

ethy

lpre

nylte

rphe

nylli

n20

7997

9-61

-4As

perg

illus

sp.

IFB-

YXS

Ant

ibac

teria

l act

iviti

es, a

nti-p

hyto

path

o-ge

nic

activ

ities

[31]

Page 23: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 23 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 2

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

414-

O-M

ethy

lpre

nylte

rphe

nylli

n20

7997

9-62

-5As

perg

illus

sp.

IFB-

YXS

[31]

42[1

,1′:4′,1′’-

Terp

heny

l]-4,

4′’-d

iol,

2′,3′,5′-t

rimet

hoxy

-(9C

I)59

914-

89-5

Aspe

rgill

us s

p. IF

B-YX

S[3

1]

43[1

,1′:4′,1′’-

Terp

heny

l]-2′

,4′’-

diol

,3′,4

,6′-

trim

etho

xy-(9

CI)

5990

3-93

-4As

perg

illus

sp.

IFB-

YXS

[31]

44[1

,1′:4′,1′’-

Terp

heny

l]-2′

,4-d

iol,3′,4′’,6′-

trim

etho

xy-(9

CI)

5990

3-92

-3As

perg

illus

sp.

IFB-

YXS

[31]

Page 24: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 24 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 3

Seco

ndar

y m

etab

olit

es o

f Alte

rnar

ia in

 Gin

kgo

bilo

ba

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

1(2

2E,2

4R)-

ergo

sta-

7,22

-die

ne-3

β,5α

,6β-

trio

l/cer

evis

tero

l51

6-37

-0Al

tern

aria

tenu

issim

a SY

-P-0

7[2

9]

2(2

R,3R

)-3,5

,7,3′,5′-p

enta

hydr

oxyfl

avan

e87

592-

94-7

Alte

rnar

ia te

nuiss

ima

SY-P

-07

[29]

33β

,5α,

9α-T

rihyd

roxy

-(22E

,24R

)-er

gost

a-7,

22-d

ien-

6-on

e88

191-

14-4

Alte

rnar

ia te

nuiss

ima

SY-P

-07

[29]

46-

Epi-s

tem

phyt

riol

1262

797-

65-8

Alte

rnar

ia te

nuiss

ima

SY-P

-07

[29]

57-

Epi-8

-hyd

roxy

alte

rtox

in I

1262

797-

64-7

Alte

rnar

ia te

nuiss

ima

SY-P

-07

[29]

6A

ltern

ario

l64

1-38

-3Al

tern

aria

No.

28

An

chol

ines

tera

se

inhi

bito

r[2

9]

7A

ltern

ario

l mon

omet

hyl e

ther

/alte

rnar

iol-

4-m

ethy

l eth

er23

452-

05-3

Alte

rnar

ia N

o. 2

8A

n an

tifun

gal a

gent

[29]

8A

lterp

eryl

enol

8889

9-62

-1Al

tern

aria

tenu

issim

a[4

5]

9A

ltert

oxin

I (d

ihyd

roal

terp

eryl

enol

)56

258-

32-3

Alte

rnar

ia s

p.[2

9]

10Er

gost

a-4,

6,8,

22-t

etra

en-3

-one

/erg

osta

-4,

6,8,

22-t

etra

en-3

-one

1947

21-7

5-0

Alte

rnar

ia N

o. 2

8[2

9]

11Er

gost

erol

57-8

7-4

Alte

rnar

ia s

p.Fo

rmat

ion

of v

itam

in D

2[2

9]

Page 25: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 25 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 3

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

12Fl

azin

1000

41-0

5-2

Alte

rnar

ia te

nuiss

ima

SY-P

-07

[47]

13So

lana

pyro

ne G

2209

24-5

1-6

Alte

rnar

ia te

nuiss

ima

SY-P

-07

[47]

14St

emph

yper

ylen

ol10

2694

-33-

7Al

tern

aria

tenu

issim

a SY

-P-0

7A

n an

tifun

gal a

gent

[47]

15Te

nuaz

onic

aci

d61

0-88

-8Al

tern

aria

No.

28

An

antib

iotic

with

ant

ivi-

ral a

nd a

ntin

eopl

astic

, al

so a

s a

myc

otox

in

[29]

16Vi

voto

xin

II12

6126

7-71

-3Al

tern

aria

No.

28

[29]

Page 26: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 26 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 4

Seco

ndar

y m

etab

olit

e of

 Pen

icill

ium

in G

inkg

o bi

loba

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

12′

-Deo

xyur

idin

e/ur

acil

deox

yrib

osid

e95

1-78

-0Pe

nici

llium

sp.

YY-

25A

ntim

etab

olite

[29]

23-

Met

hylo

rsel

linic

aci

d47

07-4

6-4

Peni

cilli

um N

o. 9

7A

ntib

acte

rial a

ctiv

ity[2

9]

33-

Met

hylp

iper

azin

e-2,

5-di

-on

e60

62-4

6-0

Peni

cilli

um s

p. Y

Y-24

[29]

4A

deni

ne73

-24-

5Pe

nici

llium

sp.

YY-

22D

ieta

ry s

uppl

emen

t[2

9]

5A

deno

sine

58-6

1-7

Peni

cilli

um s

p. Y

Y-20

Ana

lges

ic, a

ntia

rrhy

thm

ic[2

9]

6A

nthr

anila

mid

e88

-68-

6Pe

nici

llium

No.

97

Fluo

resc

ent d

yes

[54]

7A

nthr

anili

c ac

id11

8-92

-3Pe

nici

llium

No.

97

Ant

icon

vuls

ants

[55]

8Cy

clop

aldi

c ac

id47

7-99

-6Pe

nici

llium

com

mun

e (T

MSF

169)

[56]

9Fe

rulic

aci

d11

35-2

4-6

Peni

cilli

um N

o. 9

7Fr

ee ra

dica

l sca

veng

ers,

anti-

infla

mm

a-to

ry a

gent

s, an

tihyp

erte

nsiv

e ag

ents

, an

ticoa

gula

nts

[55]

10Fr

uctig

enin

e A

1446

06-9

6-2

Peni

cilli

um N

o. 9

7In

hibi

ts th

e gr

owth

of l

euke

mia

cel

ls[5

5]

Page 27: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 27 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 4

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

11In

dole

-3-a

cetic

aci

d87

-51-

4Pe

nici

llium

No.

97

Use

d fo

r pre

vent

ing,

des

troy

ing

or

miti

gatin

g pe

sts

[55]

12M

ethy

l β- d

-rib

ofur

anos

ide

7473

-45-

2Pe

nici

llium

sp.

YY-

21U

sed

to s

ynth

esiz

e no

vel a

lpha

-am

ino

acid

est

ers

agai

nst h

erpe

s si

mpl

ex

viru

s 1

(hsv

-1) a

nd h

epat

itis

b vi

rus

[29]

13O

rsel

linic

aci

d48

0-64

-8Pe

nici

llium

No.

97

[29]

14p-

Hyd

roxy

benz

oic

acid

99-9

6-7

Peni

cilli

um N

o. 9

7[5

5]

15β-

sito

ster

ol83

-46-

5Pe

nici

llium

No.

97

Hyp

olip

idem

ic a

gent

s[5

5]

16Q

uerc

etin

gly

cosi

de (o

rang

e pi

gmen

t)35

20-7

2-7

Peni

cilli

um s

p.[3

4]

Page 28: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 28 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 5

Seco

ndar

y m

etab

olit

e of

 Xyl

aria

in G

inkg

o bi

loba

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

17-

Am

ino-

4-m

ethy

lcou

mar

in26

093-

31-2

Xyla

ria s

p. Y

X-28

A fl

uore

scen

t dye

use

d to

sta

in b

io-

logi

cal s

peci

men

s[5

7]

2Pe

ntad

ecan

e62

9-62

-9Xy

laria

sp.

YX-

28Tr

eatm

ent o

f pla

ntar

ker

atos

is w

ith

med

icin

al p

lant

in d

iabe

tic p

atie

nts

[57]

3Q

uerc

etin

117-

39-5

Xyla

ria C

olle

totr

ichu

mC

hem

othe

rapy

indu

ced

oral

m

ucos

itis;

trea

tmen

t of e

rosi

ve a

nd

atro

phic

ora

l lic

hen

plan

us; c

hron

ic

obst

ruct

ive

pulm

onar

y di

seas

e;

gast

roes

opha

geal

reflu

x di

seas

e

[57]

4Te

trad

ecan

e62

9-59

-4Xy

laria

sp.

YX-2

8[5

7]

5Tr

idec

ane

629-

50-5

Xyla

ria s

p. Y

X-28

[57]

6D

ibut

yl p

htha

late

84-7

4-2

Xyla

ria s

p. Y

X-28

Aga

inst

the

larv

al tr

ombi

culid

mite

; pr

even

ting

scru

b ty

phus

of t

opic

al

appl

icat

ion

in tr

oops

[57]

71,

3-D

iphe

nyl-2

-pyr

azol

ine

2538

-52-

5Xy

laria

sp.

YX-

28[5

7]

81-

Ace

tyl-1

,2,3

,4-t

etra

hydr

opyr

idin

e19

615-

27-1

Xyla

ria s

p. Y

X-28

[57]

9Z,

Z-7,

11-H

exad

ecad

ien-

1-ol

5396

3-06

-7Xy

laria

sp.

YX-

28[5

7]

10Is

osor

bide

652-

67-5

Xyla

ria s

p. Y

X-28

Prev

entio

n of

ang

ina

pect

oris

due

to

coro

nary

art

ery

dise

ase;

sho

rt-t

erm

re

duct

ion

of in

trao

cula

r pre

ssur

e

[57]

11D

imet

hoxy

-phe

nol

91-1

0-1

Xyla

ria s

p.YX

-28

Food

Fla

vorin

g A

gent

s[5

7]

121-

hydr

oxym

ethy

l-1,2

,3,4

,-tet

rahy

dro-

naph

thal

en-

2-ol

8728

24-4

3-6

Xyla

ria s

p. Y

X-28

[57]

13(1

,4-D

imet

hylp

ent-

2-en

yl)b

enze

ne95

1288

-80-

5Xy

laria

sp.

YX-

28[5

7]

142,

4-Bi

s(1,

1-di

met

hyle

thyl

)phe

nol

96-7

6-4

Xyla

ria s

p. Y

X-28

[57]

153-

Phen

yl-4

-met

hyl-i

soxa

zol-5

(4)-

one

8752

44-9

0-9

Xyla

ria s

p. Y

X-28

[57]

Page 29: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 29 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 5

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

163,

4-D

ihyd

ro-8

-hyd

roxy

-3-m

ethy

l-iso

coum

arin

1200

-93-

7Xy

laria

sp.

YX-

28[5

7]

17[l(

3-bu

teny

lthio

)-2-n

itroe

thyl

]-ben

zene

1288

69-5

0-1

Xyla

ria s

p. Y

X-28

[57]

18Pe

ntad

ecan

oic

acid

, met

hyl e

ster

7132

-64-

1Xy

laria

sp.

YX-

28pe

stic

ide

[57]

1914

-Oct

adec

enal

5655

4-89

-3Xy

laria

sp.

YX-

28[5

7]

20E-

11,1

3-D

imet

hyl-1

2-te

trad

ecen

-1-o

l ace

tate

4000

37-0

0-5

Xyla

ria s

p. Y

X-28

[57]

21H

exad

ecan

oic

acid

, met

hyl e

ster

112-

39-0

Xyla

ria s

p. Y

X-28

Food

flav

orin

g ag

ents

[57]

22n-

Hex

adec

anoi

c ac

id57

-10-

3Xy

laria

sp.

YX-

28In

hibi

ts H

IV-1

infe

ctio

n; a

pot

entia

l ca

ndid

ate

for s

peci

fical

ly a

ttac

k m

ultip

le m

yelo

ma

cells

[57]

232-

Und

ecen

al24

63-7

7-6

Xyla

ria s

p. Y

X-28

[57]

24H

exad

ecan

oic

acid

, 14-

met

hyl-m

ethy

l est

er24

90-4

9-5

Xyla

ria s

p. Y

X-28

[57]

259,

12-O

ctad

ecad

ieno

ic a

cid(

Z,Z)

-met

hyl e

ster

112-

63-0

Xyla

ria s

p. Y

X-28

Flav

orin

g ag

ent o

r adj

uvan

t[5

7]

269-

Oct

adec

enoi

c ac

id (Z

)-,m

ethy

l est

er11

2-62

-9Xy

laria

sp.

YX-

28So

lven

ts[5

7]

273,

7,11

-trim

ethy

l-2,6

,10-

Dod

ecat

rien-

1-ol

4602

-84-

0Xy

laria

sp.

YX-

28In

hibi

ts p

rolif

erat

ion

and

indu

ces

apop

tosi

s of

tum

our-

deriv

ed b

ut

not n

on-t

rans

form

ed c

ell l

ines

[57]

289,

12-O

ctad

ecad

ieno

ic a

cid

(Z,Z

)21

97-3

7-7

Xyla

ria s

p. Y

X-28

Trea

ts th

e pr

even

tion

of p

reec

lam

p-si

a;[5

7]

299-

Oct

adec

enam

ide

(Z)

3322

-62-

1Xy

laria

sp.

YX-

28In

duce

dro

wsi

ness

or s

leep

or t

o re

duce

psy

chol

ogic

al e

xcite

men

t or

anx

iety

[57]

30Pe

ntad

ecan

oic

acid

,2-h

ydro

xym

ethy

l es

ter

9886

3-01

-5Xy

laria

sp.

YX-

28Em

ulsi

fier

[57]

31Fe

rrug

inol

514-

62-5

Xyla

ria s

p. Y

X-28

An

antin

eopl

astic

age

nt; a

ntib

acte

rial

agen

t; pr

otec

tive

agen

t[5

7]

329,

12-O

ctad

ecad

ieno

ic a

cid(

Z,Z)

-,2-h

ydro

xy-1

-(h

ydro

xy m

ethy

l)eth

yl e

ster

544-

35-4

Xyla

ria s

p. Y

X-28

Flav

orin

g ag

ents

[57]

33H

exad

ecan

oic

acid

, 2-h

ydro

xy-1

-(hyd

roxy

met

hyl)

ethy

l est

er23

470-

00-0

Xyla

ria s

p. Y

X-28

Lipi

d m

aps

clas

sific

atio

n[5

7]

Page 30: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 30 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 5

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

34Bi

s(2-

ethy

lhex

yl)p

htha

late

117-

81-7

Xyla

ria s

p.YX

-28

[57]

355,

6,8,

9,10

,11-

Hex

ahyd

robe

nz[A

]ant

hrac

ene

6706

4-61

-3Xy

laria

sp.

YX-

28[5

7]

361,

2,3,

4-Te

trah

ydro

-Trip

heny

lene

5981

-10-

2Xy

laria

sp.

YX-

28[5

7]

Page 31: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 31 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 6

Seco

ndar

y m

etab

olit

e of

 Fus

ariu

m in

 Gin

kgo

bilo

ba

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

1A

deno

sine

58-6

1-7

Fusa

rium

sola

ni G

BT07

GBT

07Te

rmin

ate

paro

xysm

al s

upra

vent

ricul

ar ta

chyc

ar-

dia;

term

inat

ing

stab

le a

nd n

arro

w-c

ompl

ex

supr

aven

tric

ular

tach

ycar

dias

; adj

unct

to

thal

lous

chl

orid

e TI

201

myo

card

ial p

erfu

sion

sc

intig

raph

y an

d va

gal m

aneu

vers

and

clin

ical

as

sess

men

t

[11]

2Be

nzen

eeth

anol

/Phe

nyle

thyl

al

coho

l60

-12-

8Fu

sariu

m s

p. G

1024

Ant

i-inf

ectiv

e ag

ents

, loc

al; d

isin

fect

ants

; pre

-se

rvat

ives

, pha

rmac

eutic

al[1

1]

3En

niat

in B

917-

13-5

Fusa

rium

sp.

[58]

4G

inkg

olid

e B

1529

1-77

-7Fu

sariu

m o

xysp

orum

[59,

60]

5H

exad

ecan

e54

4-76

-3Fu

sariu

m s

p. G

1024

[11]

6Ka

empf

erid

e49

1-54

-3Fu

sariu

m so

lani

An

antih

yper

tens

ive

agen

t[6

1]

7Ka

empf

erol

520-

18-3

Fusa

rium

oxy

spor

umA

pos

sibl

e ca

ncer

trea

tmen

t; an

tibac

teria

l age

nt[6

1]

8Q

uerc

etin

117-

39-5

Fusa

rium

oxy

spor

um[5

7]

9Ru

tin15

3-18

-4Fu

sariu

m o

xysp

orum

A ro

le a

s an

ant

ioxi

dant

; ant

ialle

rgic

; ant

i-infl

am-

mat

ory;

ant

ipro

lifer

ativ

e; a

nd a

ntic

arci

noge

nic

prop

ertie

s

[61]

10So

yasa

poge

nol B

595-

15-3

Fusa

rium

oxy

spor

um S

chle

cht

GB-

1(3)

[61]

11Te

trad

ecan

e62

9-59

-4Fu

sariu

m s

p. G

1024

[11]

12β-

Sito

ster

ol83

-46-

5Fu

sariu

m o

xysp

orum

Sch

lech

t G

B-1(

3)A

s an

ticho

lest

erem

ic d

rug;

ant

ioxi

dant

; tre

ats

hype

rlipi

dem

ia.

[61]

Page 32: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 32 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 6

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

13Is

orha

mne

tin48

0-19

-3Fu

sariu

m s

pW

arni

ng; (

tyro

sina

se in

hibi

tor;

an a

ntic

oagu

lant

)[6

2]

14D

ecan

e12

4-18

-5Fu

sariu

m s

p. G

1024

[11]

152-

Ethy

l-1-h

exan

ol10

4-76

-7Fu

sariu

m s

p. G

1024

[11]

162-

Buta

nol,3

,3′-o

xybi

s-4-

ethy

lphe

nol

123-

07-9

Fusa

rium

sp.

G10

24Fl

avor

ing

Age

nts

[11]

17D

odec

ane

112-

40-3

Fusa

rium

sp.

G10

24In

crea

se th

e ris

k of

neo

plas

ms

in h

uman

s or

an

imal

s[1

1]

181,

2-be

nzis

othi

azol

e27

2-16

-2Fu

sariu

m s

p. G

1024

[11]

194-

Ethy

l-2-m

etho

xyph

enol

2785

-89-

9Fu

sariu

m s

p. G

1024

Flav

orin

g ag

ents

[11]

20p-

Nitr

oace

toph

enon

e10

0-19

-6Fu

sariu

m s

p. G

1024

Pote

ntia

te th

e eff

ectiv

enes

s of

radi

atio

n th

erap

y in

des

troy

ing

unw

ante

d ce

lls[1

1]

212,

3,5,

6-Te

tram

ethy

l-p-b

enzo

-qu

inon

e52

7-17

-3Fu

sariu

m s

p. G

1024

prod

uct q

uino

nes

duro

quin

one

[11]

22Ei

cosa

ne11

2-95

-8Fu

sariu

m s

p. G

1024

Flav

orin

g A

gent

s.[1

1]

231,

2-Be

nzen

edic

arbo

xylic

aci

d bi

s(2-

met

hylp

ropy

l)est

er88

-99-

3Fu

sariu

m s

p. G

1024

[11]

24D

ibut

yl p

htha

late

84-7

4-2

Fusa

rium

sp.

G10

24A

gain

st th

e la

rval

trom

bicu

lid m

ite; p

reve

ntin

g sc

rub

typh

us o

f top

ical

app

licat

ion

in tr

oops

[11]

Page 33: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 33 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 7

Seco

ndar

y m

etab

olit

e of

 oth

er e

ndop

hyti

cs in

 Gin

kgo

bilo

ba

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

12-

(Hyd

roxy

met

hylth

io)e

than

ol87

6503

-58-

1Co

lleto

tric

hum

sp.

NTB

-2Pl

atel

et a

ggre

gatio

n in

hibi

tor,

an a

lpha

-glu

-co

sida

se in

hibi

tor,

an a

ntin

eopl

astic

age

nt[6

3]

2A

pige

nin-

8-C

-β-d

-gl

ucop

yran

osid

e36

81-9

3-4

Colle

totr

ichu

m s

p.[6

3, 6

4]

36-

Etho

xyl-2

,4-a

mid

e la

cton

eBa

cillu

s am

ylol

ique

faci

ens

CGM

CC 5

569

[64]

46-

Hyd

roxy

lbut

yl-2

,4-a

mid

e la

cton

eBa

cillu

s am

ylol

ique

faci

ens

CGM

CC 5

569

[64]

56-

Hyd

roxy

prop

yl-2

,4-a

mid

e la

cton

eBa

cillu

s am

ylol

ique

faci

ens

CGM

CC 5

569

[64]

6Bi

uret

108-

19-0

Baci

llus a

myl

oliq

uefa

cien

s CG

MCC

556

9U

sed

for p

reve

ntin

g, d

estr

oyin

g or

miti

gat-

ing

pest

s[6

4]

7G

inkg

olid

e B

1529

1-77

-7O

ospo

ra w

allr.

G10

Fibr

inol

ytic

age

nts

[65]

82′

-Deo

xyur

idin

e/ur

acil

deox

y-rib

osid

e95

1-78

-0U

nide

ntifi

edA

ntim

etab

olite

s[6

5]

93-

Met

hylp

iper

azin

e-2,

5-di

one

6062

-46-

0U

nide

ntifi

ed[6

5]

10A

deni

ne73

-24-

5U

nide

ntifi

ed[6

5]

11A

deni

ne d

eoxy

ribos

ide

Uni

dent

ified

[65]

12A

deno

sine

58-6

1-7

Uni

dent

ified

Use

d as

an

initi

al tr

eatm

ent f

or th

e te

rmin

a-tio

n of

par

oxys

mal

Sup

rave

ntric

ular

ta

chyc

ardi

a

[65]

Page 34: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 34 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 7

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

13Q

uerc

etin

117-

39-5

Stem

phyl

ium

sp.

Act

inom

yces

Ant

ioxi

dant

s[3

7, 6

6]

Nod

ulisp

oriu

m h

yalo

spor

umSc

hizo

phyl

lum

com

mun

e Fr

.[6

7]

Fuse

lla S

acc

Alte

rnar

ia s

pSp

hace

lia s

p.An

pelo

myc

es h

umul

i

[37]

Phom

a gl

omer

ate

[30,

61]

Tric

hoth

eciu

m[5

3]

Muc

or c

ircin

ello

ides

[40]

Spha

erop

sis s

p. B

301

[68]

14Ka

empf

erol

520-

18-3

Fuse

lla S

acc

Alte

rnar

ia s

p.G

ibbe

rella

sp.

Spha

celia

sp.

Dem

atiu

m P

ers

As

a se

lect

ive

estr

ogen

rece

ptor

mod

ulat

or[6

6]

Tric

hoth

eciu

m[5

3]

Spha

erop

sis s

p.[6

8]

15Ce

rebr

osid

e B

8864

2-46

-0Ph

yllo

stic

ta s

p. T

P78,

(Gen

Bank

ID

: KC

4457

36)

An

antim

icro

bial

com

poun

d[2

0, 2

1]

16Ce

rebr

osid

e C

9867

7-33

-9Ph

yllo

stic

ta s

p. T

P78

(Gen

Bank

ID

: KC

4457

36)

Incr

ease

s to

lera

nce

to c

hilli

ng in

jury

and

al

ters

lipi

d co

mpo

sitio

n in

whe

at ro

ots

[20,

21]

17En

niat

in B

119

914-

20-6

Tube

rcul

aria

ceae

F1-

3Fu

sariu

m m

ycot

oxin

s[6

9]

18En

niat

in D

1989

3-21

-1Tu

berc

ular

iace

ae s

p. F

1-3

Inhi

bitio

n of

Bot

rytis

cin

erea

spo

re g

erm

ina-

tion

[69]

19Be

nzen

eeth

anol

/Phe

nyle

thyl

al

coho

l60

-12-

8M

usco

dor a

lbus

str

ain

GBA

Ant

i-bac

teria

l age

nts

and

antio

xida

nts.

Ant

i-In

fect

ive

Age

nts

[69]

Page 35: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 35 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 7

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

20G

inkg

olid

e C

1529

1-76

-6G

loeo

spor

ium

; Tol

ura;

Pha

co-

dium

Redu

ced

lipid

acc

umul

atio

n an

d su

ppre

sses

ad

ipog

enes

is[3

2]

21Ka

empf

erid

e49

1-54

-3Ph

oma

glom

erat

aRe

vers

e ba

cter

ial r

esis

tanc

e to

am

oxic

illin

in

ARE

C[6

1]

Anpe

lom

yces

hum

uli

[61]

22Ru

tin15

3-18

-4M

ucor

circ

inel

loid

es G

F521

Use

d th

erap

eutic

ally

to d

ecre

ase

capi

llary

fra

gilit

y[6

1]

Nod

ulisp

oriu

m h

yalo

spor

um[6

7]

23Sp

orot

hrio

lide

1547

99-9

2-5

Nod

ulisp

oriu

m s

p. A

21U

sed

to tr

eat t

he in

fect

ion

caus

ed b

y ca

ndid

a al

bica

ns a

nd c

rypt

ococ

cus

neof

orm

ans

[55]

24Is

orha

mne

tin48

0-19

-3St

emph

yliu

m s

p.Al

tern

aria

sp

Gib

bere

lla s

p.Tr

icho

thec

ium

prev

ents

end

othe

lial d

ysfu

nctio

n, s

uper

-ox

ide

prod

uctio

n, Is

orha

mne

tin a

ppea

rs

to b

e a

pote

nt d

rug

agai

nst e

soph

agea

l ca

ncer

[62]

spha

erop

sis[6

8]

Plan

tact

inos

pora

sp.

NEA

U-g

xj3

[20,

21]

25A

ntib

iotic

U-6

2162

8251

6-67

-4Pl

anta

ctin

ospo

ra s

p. N

EAU

-gxj

3In

hibi

ted

the

grow

th o

f Gra

m-p

ositi

ve

bact

eria

[20,

21]

26Sa

ltern

amid

e C

1662

688-

81-4

spha

erop

sis[6

8]

27A

bsci

sic

acid

2129

3-29

-8Ph

oma

beta

ePl

ant G

row

th R

egul

ator

[69]

28Ta

xol

3306

9-62

-4Ph

omop

sis s

p. 2

str

ain

BKH

30

(BSL

No.

72)

An

antin

eopl

astic

age

nt, t

ubul

in m

odul

ator

s[7

0]

Mus

codo

r alb

us s

trai

n G

BA[6

9]

29A

cetic

aci

d, m

ethy

l est

er79

-20-

9M

usco

dor a

lbus

str

ain

GBA

[69]

Page 36: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 36 of 40Yuan et al. Chin Med (2019) 14:51

Tabl

e 7

(con

tinu

ed)

No.

Met

abol

ites

CAS

num

ber

Mol

ecul

ar s

truc

ture

Endo

phyt

esA

pplic

atio

nRe

fere

nces

302-

Buta

none

78-9

3-3

Mus

codo

r alb

us s

trai

n G

BAPo

lar a

prot

ic s

olve

nt[6

9]

31A

cetic

aci

d, 2

-met

hylp

ropy

l es

ter

110-

19-0

Mus

codo

r alb

us s

trai

n G

BAA

n an

tifun

gal a

gent

[71]

321-

Prop

anol

, 2-m

ethy

l78

-83-

1M

usco

dor a

lbus

str

ain

GBA

Poss

esse

s ni

cotin

e-lik

e sy

napt

otro

pic

actio

ns

on th

e ne

rvou

s sy

stem

s[7

1]

331-

Buta

nol,

3-m

ethy

l-,ac

etat

e12

3-92

-2M

usco

dor a

lbus

str

ain

GBA

[71]

34Cy

cloh

exan

e,1-

met

hyl-4

-met

h-yl

ene

2808

-80-

2M

usco

dor a

lbus

str

ain

GBA

[69]

352,

3-D

imet

hyl-3

-isop

ropy

l-cy

clop

ente

ne73

331-

73-4

Mus

codo

r alb

us s

trai

n G

BA[6

9]

361-

Buta

nol,

3-m

ethy

l12

3-51

-3M

usco

dor a

lbus

str

ain

GBA

[69]

37Py

rrol

idin

e12

3-75

-1M

usco

dor a

lbus

str

ain

GBA

[72]

38G

erm

acre

ne B

1542

3-57

-1M

usco

dor a

lbus

str

ain

GBA

[72]

39α-

Sine

nsal

1790

9-77

-2M

usco

dor a

lbus

str

ain

GBA

[69]

40Pr

opan

oic

acid

, 2-m

ethy

l79

-31-

2M

usco

dor a

lbus

str

ain

GBA

[73]

41Tr

ans-

cary

ophy

llene

87-4

4-5

Mus

codo

r alb

us s

trai

n G

BAA

nti-i

nflam

mat

ory

agen

ts[7

3]

424-

Pipe

ridin

one,

1-m

ethy

l14

45-7

3-4

Mus

codo

r alb

us s

trai

n G

BA[7

3]

43A

cetic

aci

d, 2

-phe

nyle

thyl

est

er10

3-45

-7M

usco

dor a

lbus

str

ain

GBA

[73]

44(+

)-Vitr

ene

9025

0-82

-1M

usco

dor a

lbus

str

ain

GBA

[73]

Page 37: Endophytes from Ginkgo biloba and their secondary …...Ginkgo biloba is a medicinal plant which contains abundant endophytes and various secondary metabolites. Accord Accord- ing

Page 37 of 40Yuan et al. Chin Med (2019) 14:51

This strain displayed the strongest antibacterial activity [35].

Secondary metabolites of Xylaria43 kinds of compounds were isolated from the fermen-tation products of Xylaria in Ginkgo biloba (Table  5), in which the compound 7-amino-4-methylcoumarin was isolated from the fermentation product of Xylaria sp. YX-28 [36]. It has antibacterial activity and also has strong inhibitory activity against 13 kinds of human sus-ceptible pathogens, which is significantly higher than the positive controls ampicillin, gentamicin and tetracycline.

Secondary metabolites of FusariumFusarium is one of the dominant bacteria, which can be isolated from different parts of Ginkgo cultivated in vari-ous areas. According to the literatures, 25 kinds of com-pounds were isolated from the fermentation products of Fusarium (Table  6). Since Fusarium of G. biloba can produce ginkgolides B, it can be used as a new source of ginkgolides B [37]. Some studies have shown that Fusar-ium oxysporum GF521 can produce rutin and kaemp-ferol, and the total flavonoids production of endophytic fungi is 21.10 ± 1.30 mg/L, which indicates that Fusarium genus also have a high ability of producing flavonoids [37].

Secondary metabolites of other genus53 compounds were isolated from the fermentation products of other genus in G. biloba (Table  7), some of which can also produce other valuable compounds. From the endophytic Muscodor albus GBA, 19 kinds of volatile components can be separated [24], which normally have a strong ecological effect. Some vola-tile components can inhibit the pathogenic microor-ganisms and enhance the disease resistance of plants. Bacillus amyloliquefaciens can produce 8 kinds of compounds [35, 37] which have some biological activi-ties. Two compounds, apigenin-8-C-glucoside and 2-(Hydroxymethylthio) ethanol, were isolated from Colletotrichum sp. NTB-2., in which apigenin-8-C-glucoside has strong inhibitory activity against Bacil-lus subtilis, Salmonella typhimurium and Pseudomonas cepacia [38]. Moreover, Colletotrichum sp. could pro-duce flavones which exhibited potent anti-cancer, anti-HIV [39] and antioxidant activities [40].

In recent years, some new ginkgo endophytes and sec-ondary metabolites have been discovered. Guo et al. [20, 21] discovered a new amide compound from Plantacti-nospora sp. NEAU-gxj3, Cao et al. [22] found the metab-olite sporothriolide from the Nodulisporium of G. biloba, which has anti-phytopathogenic activity.

Application of secondary metabolites from Ginkgo bilobaFollowing the discovery by Schwabe of Germany that Ginkgo biloba contains active ingredients—ginkgo flavo-noids and ginkgolides for the prevention and treatment of cardiovascular, cerebrovascular and neurological dis-eases, the researches about ginkgo has become more popular. Germany and France were the first countries in the world to develop ginkgo leaf products. In the mid-1970s, they first developed Ginkgo biloba leaves for the treatment of cardiovascular diseases. Since then, there are more than 50 kinds of ginkgo products on the market.

In the application, Ginkgo can be used with the extracts. Some examples, a substance EGb 761 extracted from Ginkgo biloba has shown to be effective against Noise-induced hearing loss (NIHL) in an animal model. This substance is assumed to protect the cochlea from hair cell loss after intensive noise exposure by reducing reactive oxygen species (ROS). Further effects of EGb 761 on the cellular and systemic levels of the nervous system make it a promising candidate not only for protection against NIHL but also for its secondary comorbidities like tinnitus [41]; One Ginkgo biloba extract (GbE) was used as a nontoxic natural reducing and stabilizing agent for preparing cytocompatible graphene. The as-prepared GbE-reduced graphene oxide (Gb-rGO) showed sig-nificant biocompatibility with cancer cells. Addition of GbE makes rGO producing procedure cost-effective and green. This method could be used for various biomedi-cal applications, such as tissue engineering, drug delivery, biosensing, and molecular imaging [42].

Some application has been using a part of the plant. Another example, Ginkgo tea is a kind of health food pro-duced from Ginkgo biloba leaves. Two kinds of glycosi-dase were used to improve the flavor of Ginkgo tea, and three kinds of bioactivities were selected to investigate the health care function of the tea infusion [43].

The Ginkgo preparation mainly includes capsules, tablets, granules, tea bags. Capsules and tablets are most popular in the formulation of the product. Recently, new prepara-tion like shampoo, facial cleanser and hair moisturizer have been introduced in cosmetics applications. Most of the ginkgo products on the market are registered as health foods and a few are registered as over-the-counter drugs.

In many existing products, especially in the medi-cines, 24% of total flavonoids and 6% of ginkgolides are the basic quality requirements for Ginkgo biloba extracts. Some famous manufacturers proposed higher standards. They appended ginkgolides A, B, C, J and biloba lactone as the quality indicators and generally required the con-tent of ginkgolides A, B, C, J greater than 2.5%, the con-tent of biloba lactone greater than 2.6%.

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Page 38 of 40Yuan et al. Chin Med (2019) 14:51

On the basis of data about the endophytes and sec-ondary metabolites in G. biloba, the catalogue is diverse in terms of structural complexity and lots of them have promising biological activities, which have the poten-tial to be a source of new pharmaceutical agents which have a constant, critical need to combat cancers, viral infections, infectious diseases, and autoimmune disor-ders. There is also a growing need to fight insect-borne diseases of both animals and plants as climatological changes provide conditions conducive to more intensive outbreaks of these events. The fight against any disease is a dynamic equilibrium between advances in chemother-apy and natural selection in infectious or invasive agents. If the scientific community is to maintain parity in this never-ending struggle, then new sources of novel, bioac-tive chemotherapeutic agents must be found.

It appears that the mechanism by which endophytes produce secondary metabolites that mimic those pro-duced by their host plants is far from clear. Even though efforts to unravel the pathway genes in the endophytes, it has failed to detect critical genes corresponding to those existing in plants, our understanding of the mecha-nisms associated with the development of different dis-eases increases, our ability to use this knowledge to select for ever more potent and selective compounds should

increase commensurately. Endophytes of G. biloba will continue to provide a fertile arena for these quests.

ProspectsWith human aging process is accelerating, it has been common pursuit for a healthy and high-quality living. Since Ginkgo biloba preparations have a worldwide repu-tation as natural medicines and healthy products, Ginkgo development and the prospects are attractive. In the United States, Ginkgo biloba extracts have been on the list of imported drugs. Ginkgo products on the market are almost all products of American companies, and few products have been seen in Europe. At present, the Euro-pean market is basically occupied by French and German products. Most of the Ginkgo extracts on the US market are produced by Japan and South Korea, a small portion is purchased from China.

Although comparing with the developed countries, China market is not competitive and too weak to take the risks, the potential of China’s Ginkgo development is still worth looking forward to. China is the birthplace and main producing area of the world’s Ginkgo. Many excellent Ginkgo germplasm resources are valuable treasures for China. With the sharp increase in Ginkgo resources and products output in China, the market has become more concerned at present (Fig.  7). At present, the Ginkgo products in China have low added-value and quality. In the development of ginkgo industry in China, it is necessary to increase the quality standardization and to improve the scientific research efforts and the produc-tion technology of Ginkgo preparations. It deserves to initiate new and technological products on flavonoids, bilobalide, polyisoprene, etc. Especially some new appli-cation in other industries should be explored, such as supplying in cytocompatible graphene preparation.

Chinese people have a tradition to have Ginkgo prepa-ration as healthy products. China’s population accounts for about a quarter of the world’s total population. There-fore, the Ginkgo products in China should have more concerns on the domestic market and at the same time expand the international market with high-quality and featured products.

AbbreviationsG. biloba: Ginkgo biloba; CD: electronic circular dichroism; Gb-rGO: gbE-reduced graphene oxide; NIHL: noise-induced hearing loss; ROS: reactive oxygen species.

AcknowledgementsNot applicable.

Authors’ contributionsZY and YT drafted the manuscript and prepared tables and figures. FH and HZ contributed to revisions of the manuscript. All authors read and approved the final manuscript.

503.5568.2

610.1664.1

712.5

Ging

o ex

trac

t pro

duc�

on/t

year

2014 2015 2016 2017 2018

prop

or�o

n of

Gin

kgo

prod

uc�o

n/%

year

a

b

Fig. 7 The production of Ginkgo extracts in China and its proportion in the world market. a The production of Ginkgo extracts in China from 2015 to 2019; b the proportion of China Ginkgo products in the world market from 2014 to 2018

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Page 39 of 40Yuan et al. Chin Med (2019) 14:51

FundingThe work reported in the paper has been supported by the National Natural Science Foundation of China (No. 31741109), the Hunan Provincial Natural Science Foundation of China (Nos. 2018JJ2145, 2018JJ2146) and the Scientific Research Project of Hunan University of Science and Technology (17XKY002, 17XKY011, 17XKY012).

Availability of data and materialsNot applicable.

Ethics approval and consent to participateNot applicable.

Consent for publicationNot applicable.

Competing interestsThe authors declare that they have no competing interests.

Author details1 College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China. 2 Hunan Provincial Engineering Research Center for Ginkgo Biloba, Yongzhou 425199, China. 3 College of Chemistry and Bio-engineering, Hunan University of Science and Engineering, Yongzhou 425199, China.

Received: 14 July 2019 Accepted: 23 October 2019

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