Serveur d'exploration Phytophthora

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Zoospore encystment and pathogenicity of Phytophthora and Pythium species on plant roots.

Identifieur interne : 001F46 ( Main/Exploration ); précédent : 001F45; suivant : 001F47

Zoospore encystment and pathogenicity of Phytophthora and Pythium species on plant roots.

Auteurs : Yannis Raftoyannis [Grèce] ; Michael W. Dick

Source :

RBID : pubmed:16338584

Descripteurs français

English descriptors

Abstract

Seven plant species (lucerne, maize, oat, sugarbeet, sorghum, tomato, wheat) and 12 Pythium and Phytophthora species were used in a comparative study designed to investigate the effects of plant and oomycete inter-specific variation on zoospore encystment density and pathogenicity. Zoospores showed differential encystment behaviour and they encysted more on dicotyledonous than on monocotyledonous plants. Pythium aphanidermatum, P. deliense, and Phytophthora nicotianae were the most aggressive species. Sugarbeet was the most severely attacked plant species followed by tomato while oat plants were relatively unaffected. The relationship between zoospore encystment on roots and disease severity depended on the oomycete-plant combination. Correlation analysis between zoospore encystment density and disease severity indicated low and no significant levels (p.05) of association for most plant-oomycete combinations.

DOI: 10.1016/j.micres.2005.04.003
PubMed: 16338584


Affiliations:


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Le document en format XML

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