ResistVirMechanisms and sources of resistance

Josef SPAK

Academy of Sciences of the Czech Republic, Ceske Budejovicespak@umbr.cas.cz http://www.umbr.cas.cz

Institute of Plant Molecular Biology

• Brassica viruses - TuMV, CaMV, TYMV, RaMV

• Fruit ilarviruses - ApMV, PDV, PNRSV

• Small fruit viruses – Strawberry - Nepoviruses, Aphid transmissible v.

– Raspberry - Nepoviruses, RBDV

– Currants - BRV, phytoplasma

Experience and Interests

• TuMV - EU Project „Disease management of turnip mosaic virus in oilseed rape“. Coordinator J.A. Walsh HRI, Wellesbourne, U.K. – Lehmann P, Petrzik K, Jenner C, Greenland A, Špak J, Kozubek E, Walsh JA.: Nucleotide and

amino acid variation in the coat protein coding region of turnip mosaic virus isolates and possible involvement in the interaction with the brassica resistance gene TuRB01. Physiological and Molecular Plant Pathology 51: 195 - 208, 1997.

– Tomimura K, Špak J, Katis N, Jenner CE, Walsh JA, Gibbs AJ, Ohshima K. Comparisons of the genetic structure of populations of Turnip mosaic virus in west and east Eurasia. Virology 330, 408-423, 2004.

• TYMV - seed transmission, field resistence in oilseed rape

• RaMV - variability of world isolates – Špak J, Kubelková D.: Serological variability among European isolates of radish mosaic virus.

Plant Pathology 49: 295 - 301, 2000.

– current work - full sequence, genome variability

Brassica viruses

CP variability of ilarviruses Distribution of mutations on the CP genes

PDV

PNRSV

ApMV 104/590

153/660

214/682

ApMV 203/675

Host-virus relationships Phylogeny of PNRSV

Plum isolates Cherry isolates

No correlation between host plant, CP sequence, geographical origin

• Petrzik K. (2005) Capsid protein sequence gene analysis of Apple mosaic virus infecting pears Eur. J. Plant Pathol. 111 355-360

• Petrzik K., O.Lenz (2002) Remarkable variability of Apple mosaic virus capsid protein gene after the nucleotide position 141 Archives of Virology 147 1275-1285

• Vašková D., K.Petrzik, J.Špak (2000) Molecular variability of the capsid protein of the prune dwarf virus Eur. J. Plant Pathol. 106 573-580

• Vašková D., K.Petrzik, R.Karešová (2000) Variability and molecular typing of the woody-tree infecting necrotic ringspot ilarvirus Archives of Virology 145 699-709

Fruit ilarviruses - ApMV, PDV, PNRSV

• Strawberry – Nepoviruses– SVBV – full sequence, genome variability– SVBV, SMYEV, SCV, SMoV

5th Framework project „Virus Detector“, coordinated by Wageningen UR, Netherlands

• Raspberry – Nepoviruses– RBDV

• Ribes – current work– Black currant reversion disease– Full blossom disease

Small fruit viruses

• THOMPSON, J.R., WETZEL, S., KLERKS, M.M., VASKOVÁ, D., SCHOEN, C.D., JELKMANN, W., SPAK, J.: Multiplex RT-PCR detection of four aphid-borne strawberry viruses in Fragaria spp. in combination with a plant mRNA specific internal control. - Journal of Virological Methods 111: 85-93, 2003.

• KLERKS MM, LINDNER JL, VASKOVA D, SPAK J, THOMPSON JR, JELKMANN W, SCHOEN CD. Detection and tentative grouping of Strawberry crinkle virus isolates. European Journal of Plant Pathology 110 (1): 45-52, 2004.

• VASKOVA D, SPAK J, KLERKS MM, SCHOEN CD, THOMPSON JR, JELKMANN W.: Real-time NASBA for detection of Strawberry vein banding virus. European Journal of Plant Pathology 110 (2): 213-221, 2004.

Small fruit viruses