WELCOME

BLASTOMYCETES

PRESENTED BY, SOMASHEKARA.H.E.

CONTENTS• INTRODUCTION• CLASSIFICATION• ORDER-SPOROBOLOMYCETALES• ORDER-CRYPTOCOCCALES• CONCLUSION• REFERENCE

INTRODUCTIONBLASTOMYCETES• It is an arbitary taxon for the asporogenous

yeasts, which do not produce asco or basidiospores.

• Exist as budding cells or Pseudomycelium• Reproduce by budding or fission.• Most of the members are saprobes occuring

on flowers, leaves, bark, wood.• Some of them occur on fresh and sea water.• Some associated with plant disease like

powdery mildews, rusts and smuts.

CLASSIFICATIONDIVISION-EUMYCOTASUB DIVISION-DEUTEROMYCOTACLASS-BLASTOMYCETES The class Blastomycetes is divided into two

orders1.Sporobolomycetales2.Cryptococcales

ORDER-SPOROBOLOMYCETALESIt contains single family

Sporobolomycetaceae with Four genera. 1.Sporobolomyces. 2.Bullera 3.Itersonilia 4.Tilletiopsis• These grow abundantly as saprophytes on

sugary surfaces of ripe fruits, leaves etc.

Bullera hoabinhensis

Itersonilia perplexans Tilletiopsis species

Sporobolomyces roseus

SPOROBOLOMYCESThe genus Sporobolomyces

contains seven species.

It grow saprophytically on ripe fruits, senescent leaves etc.

S.roseus can be cultured very easily by placing senescent grass leaf over nutrient agar medium.

Sporobolomyces roseus

ORDER- CRYPTOCOCCALES It consists of 15 genera in a single family

Cryptococcaceae.

The cryptococcales are primarily saprobic some of the species are pathogenic to animals and humans.

The well known genera of the family are 1.Cryptococcus 2.Candida 3.Malassezia 4.Trichosporon 5.Rhodotorula

CRYPTOCOCCUS• The genus Cryptococcus contains 17

species.• Widely distributed in soil and on decaying

plant material.• Few are pathogenic to man and animal.• It is a non filamentous growth.

Cryptococcous neoformans cell

Cryptococcous neoformans

CANDIDAThe genus Candida was esected

by Beskhout in 1923.Candida are yeast like

organinsms with sdtrong Mycelial or Pseudomycelial growth and multilateral budding.

Members are isolated from soil plant and animal.

Some of the candida are pathogenic to man and animal.

C.utilis is an important source of proteins. Candida

utilius

RHODOTORULAIt contains 9 species.It is a single celled yeast like fungus.Species live on the land and in the ocean.It has characteristic pink or yellow or red

color in the colony due to prescence of carotenoid pigments.

Rhodotorula glutinis Rhodotorula pacifica

TRICHOSPORONIt is widely distributed fungus, common in

soil.Pseudomycelium and true mycelium are

found abundantly.T.beigelii is responsible for white piedra of

man and horse in regions of Europe, Asia, South america.

Trichosporon beigelii Trichosporon cutaneum

MALASSEZIAIt is a small genus with one or two species.

M.furfur is responsible for pityrisasis which is a superficial skin disease of man.

Malassezia furfur

Malassezia furfur

CONCLUSION Class - Blastomycetes is an imperfect fungi which

do not produce asco or basidiospores. They reproduce by budding or fission.

These are pathogenic to man and animals.

REFERENCEMehrotra.R.S. & Anneja.K.R. An Introduction to

Mycology, New age international publishers. New Delhi.

http://www.google.co.in/#sclient=psy-ab&hl=en&source=hp&q=blastomycetes

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