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Identification, polymorphisme et évolution moléculaire de gènes du pouvoir pathogène chez le nématode à kyste de la pomme de terre Globodera pallida

Abstract : Potato cyst nematodes of the genus Globodera are microscopic and heterotrophic worms, that parasite the roots of the Solanaceaous plants. They are obligatory endoparasitic organisms that establish an intimate relationship with their host plant. They can feed through their elaborate feeding site. This feeding structure is induced by the nematode secreted proteins that are directly injected in plant cells through their stylet (anterior structure like a needle). The function of pathogenicity proteins identified to date is often unknown. We studied the variability and the evolutionary pattern of genes encoding such proteins in the cyst nematode family. The pathogenicity genes seemed to have an accelerated evolutionary tempo compared to housekeeping genes and seemed to be under diversifying selective pressures.
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https://tel.archives-ouvertes.fr/tel-00132028
Contributor : Alexandra Blanchard <>
Submitted on : Tuesday, February 20, 2007 - 9:23:44 AM
Last modification on : Friday, October 23, 2020 - 4:37:38 PM
Long-term archiving on: : Wednesday, April 7, 2010 - 2:48:42 AM

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  • HAL Id : tel-00132028, version 1

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Alexandra Blanchard. Identification, polymorphisme et évolution moléculaire de gènes du pouvoir pathogène chez le nématode à kyste de la pomme de terre Globodera pallida. Biochimie [q-bio.BM]. Université Rennes 1, 2006. Français. ⟨tel-00132028⟩

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