Author: N. Sakr
View More View Less
  • 1 Syrian Atomic Energy Commission Department of Agriculture P.O. Box 6091 Damascus Syria
  • 2 INRA-UBP, UMR 1095 234 Avenue du Brézet 63100 Clermont-Ferrand France
Restricted access

Purchase article

USD  $20.00

1 year subscription (Individual Only)

USD  $542.00

Pathogenicity including virulence and aggressiveness characteristics was studied on three Plasmopara halstedii (the causal agent of downy mildew) isolates of races 710, 714 and 704 using five single zoosporangium isolates per pathogen isolate. Based on the reaction for the P. halstedii isolates to four sunflower hybrids H1 to H4 varying only in their downy mildew resistance genes, there were differences in virulence spectrum in pathogen isolates. Analysis of five single zoosporangium isolates for P. halstedii isolates showed significant variability within pathogen isolate for all aggressiveness criteria. There were no significant differences among pathogen isolates for all aggressiveness criteria. There were significant differences in the morphology of zoosporangia and sporangiophores for pathogen isolates. Genetic relationships were detected between pathogen isolates using 12 EST-derived markers. There was no intra-race genetic variation, but three genetically-identified groups were detected among pathogen isolates.

  • Ahmed S., Delmotte F. and Tourvieille de Labrouhe D. (2012): Emerging virulence arising from hybridisation facilitated by multiple introductions of the sunflower downy mildew pathogen Plasmopara halstedii. Fungal Genet. Biol. 49, 847–855.

    Tourvieille Labrouhe D. , 'Emerging virulence arising from hybridisation facilitated by multiple introductions of the sunflower downy mildew pathogen Plasmopara halstedii ' (2012 ) 49 Fungal Genet. Biol. : 847 -855.

    • Search Google Scholar
  • As-Sadi F., Carrere S., Gascuel Q., Hourlier T., Rengel D., Le Paslier M. C., Bordat A., Boniface M. C., Brunel D., Gouzy J., Godiard L. and Vincourt P. (2011): Transcriptomic analysis of the interaction between Helianthus annuus and its obligate parasite Plasmopara halstedii shows single nucleotide polymorphisms in CRN sequences. BMC Genomics 12, 4–8.

    Vincourt P. , 'Transcriptomic analysis of the interaction between Helianthus annuus and its obligate parasite Plasmopara halstedii shows single nucleotide polymorphisms in CRN sequences ' (2011 ) 12 BMC Genomics : 4 -8.

    • Search Google Scholar
  • Delmotte F., Giresse X., Richard-Cervera S., M’baya J., Vear F., Tourvieille J., Walser P. and Tourvieille de Labrouhe D. (2008): Single nucleotide polymorphisms reveal multiple introductions into France of Plasmopara halstedii, the plant pathogen causing sunflower downy mildew. Infect. Genet. Evol. 8, 534–540.

    Tourvieille Labrouhe D. , 'Single nucleotide polymorphisms reveal multiple introductions into France of Plasmopara halstedii, the plant pathogen causing sunflower downy mildew ' (2008 ) 8 Infect. Genet. Evol. : 534 -540.

    • Search Google Scholar
  • Jin L. and Chakraborty R. (1993): Estimation of genetic distance and coefficient of gene diversity from single-probe multilocus DNA fingerprinting data. Mol. Biol. Evol. 11, 120–127.

    Chakraborty R. , 'Estimation of genetic distance and coefficient of gene diversity from single-probe multilocus DNA fingerprinting data ' (1993 ) 11 Mol. Biol. Evol. : 120 -127.

    • Search Google Scholar
  • Librado P. and Rozas J. (2009): DnaSP v5: a software for comprehensive analysis of DNA polymorphism data. Bioinformatics 25, 1451–1452.

    Rozas J. , 'DnaSP v5: a software for comprehensive analysis of DNA polymorphism data ' (2009 ) 25 Bioinformatics : 1451 -1452.

    • Search Google Scholar
  • Sakr N. (2011): Evolution of pathogenicity in Plasmopara halstedii (sunflower downy mildew). Arch. Phytopathol. Plant Protect. 44, 1432–1436.

    Sakr N. , 'Evolution of pathogenicity in Plasmopara halstedii (sunflower downy mildew) ' (2011 ) 44 Arch. Phytopathol. Plant Protect. : 1432 -1436.

    • Search Google Scholar
  • Sakr N. (2012): Virulence cost in Plasmopara halstedii (sunflower downy mildew). Arch. Phytopathol. Plant Protect. 45, 646–651.

    Sakr N. , 'Virulence cost in Plasmopara halstedii (sunflower downy mildew) ' (2012 ) 45 Arch. Phytopathol. Plant Protect. : 646 -651.

    • Search Google Scholar
  • Sakr N., Ducher M., Tourvieille J., Walser P. and Tourvieille de Labrouhe D. (2007): A new method to obtain monozoosporangial isolates of sunflower downy mildew (Plasmopara halstedii). Cryptogamie Mycologie 28, 123–131.

    Tourvieille Labrouhe D. , 'A new method to obtain monozoosporangial isolates of sunflower downy mildew (Plasmopara halstedii) ' (2007 ) 28 Cryptogamie Mycologie : 123 -131.

    • Search Google Scholar
  • Snedecor G. W. and Gochran W. G. (1989): Statistical Methods. The Iowa State University Press. pp. 1–528.

    Gochran W. G. , '', in Statistical Methods , (1989 ) -.

  • Spring O. and Zipper R. (2006): Evidence for asexual genetic recombination in sunflower downy mildew, Plasmopara halstedii. Mycol. Res. 110, 657–663.

    Zipper R. , 'Evidence for asexual genetic recombination in sunflower downy mildew, Plasmopara halstedii ' (2006 ) 110 Mycol. Res. : 657 -663.

    • Search Google Scholar
  • Tourvieille de Labrouhe D., Bordat A., Tourvieille J., Mestries E., Walser P., Sakr N., Ducher M., Delmotte F. and Vear F. (2010): Impact of major gene resistance management for sunflower on fitness of Plasmopara halstedii (downy mildew) populations. Oleagineux, Corps Gras, Lipides 17, 56–64.

    Vear F. , 'Impact of major gene resistance management for sunflower on fitness of Plasmopara halstedii (downy mildew) populations ' (2010 ) 17 Oleagineux, Corps Gras, Lipides : 56 -64.

    • Search Google Scholar
  • Tourvieille de Labrouhe D., Pilorge E., Nicolas P. and Vear F. (2000): Le mildiou du tournesol. CETIOMINRA Publications. pp. 1–176.

    Vear F. , '', in Le mildiou du tournesol , (2000 ) -.

  • Tourvieille de Labrouhe D., Serre F., Roche S., Walser P. and Vear F. (2008): Quantitative resistance to downy mildew (Plasmopara halstedii) in sunflower (Helianthus annuus). Euphytica 164, 433–444.

    Vear F. , 'Quantitative resistance to downy mildew (Plasmopara halstedii) in sunflower (Helianthus annuus) ' (2008 ) 164 Euphytica : 433 -444.

    • Search Google Scholar
  • Van der Plank J. E. (1968): Disease Resistance in Plants. Academic Press, New York, pp. 1–206.

    Plank J. E. , '', in Disease Resistance in Plants , (1968 ) -.

  • Viranyi F. and Spring O. (2011): Advances in sunflower downy mildew research. Eur. J. Plant Pathol. 129, 207–220.

    Spring O. , 'Advances in sunflower downy mildew research ' (2011 ) 129 Eur. J. Plant Pathol. : 207 -220.

    • Search Google Scholar

Monthly Content Usage

Abstract Views Full Text Views PDF Downloads
Jun 2020 0 0 0
Jul 2020 1 0 0
Aug 2020 2 0 0
Sep 2020 0 0 0
Oct 2020 8 0 0
Nov 2020 0 1 0
Dec 2020 0 0 0