European Journal of Plant Pathology

, Volume 104, Issue 5, pp 465–475

Testing variability in pathogenicity of Phytophthora cinnamomi

  • Cécile Robin
  • Marie-Laure Desprez-Loustau
Article

DOI: 10.1023/A:1008649806620

Cite this article as:
Robin, C. & Desprez-Loustau, ML. European Journal of Plant Pathology (1998) 104: 465. doi:10.1023/A:1008649806620

Abstract

Forty eight isolates of Phytophthora cinnamomi from various host plants in France (35 isolates) and in other countries were tested for pathogenicity. Seedlings of chestnut, northern red oak, pine and eucalyptus were infected by soil contamination. Taproots, stems and bark strips of plants of chestnut and different oak species were inoculated with mycelium agar disks. Results of the different experiments were in good agreement. All isolates appeared pathogenic to all the different test species but with variable levels of virulence. Isolates with consistent low or high level of virulence, which could be used as standards in further studies, were identified. Interaction between P. cinnamomi isolates and host plant species was significant in terms of lesion lengths. These interactions could not be related to host from which P. cinnamomi was isolated. Consistent with this, in Quercus rubra, the isolate-provenance interaction was not significant. This feature is encouraging for provenance screening for resistance to P. cinnamomi in this species. The variation in virulence was not related to other isolate characteristics (mating type, electrophoretic type, age).

oak Quercus rubra chestnut Castanea sativa virulence specific pathogenicity 

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Cécile Robin
    • 1
  • Marie-Laure Desprez-Loustau
    • 1
  1. 1.Station de Pathologie VégétaleInstitut National de la Recherche AgronomiqueVillenave d'OrnonFrance

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