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Réponse d’Arabidopsis thaliana au Turnip mosaic virus (TuMV) en conditions extérieures et en conditions contrôlées : phénotypage fin de traits de maladie et métaboliques et architecture génétique associée

Abstract : Plants are immobile organisms which have to adapt to abiotic and biotic constraints. Among bioticstress, established or emerging viral diseases, may be responsible for major yield losses withsignificant consequences. Genetic control is the most effective, environmentally and consumerfriendlyway to control viral infections. Understanding plant/virus interactions remains essential tosearch for new sources of resistance. This work, focuses on the study of the natural pathosystemArabidopsis thaliana/Turnip mosaic virus (TuMV). Most of the trials were conducted in commongarden conditions allowing the analysis of the interaction in a multistress environment. A. thaliana’sresponse was explored through the study of disease-related traits and the variations in primary andsecondary metabolites. This work allows i) the fine characterization of A. thaliana’s response toTuMV in multistress conditions through the exploration of the natural diversity of a world and Frenchpopulation ii) to determine the genetic architecture of this interaction by genome wide associationsand QTL mapping. Several new loci potentially involved in the response have been identified iii) tohighlight the interest of metabolic phenotyping to discriminate accessions according to theirsusceptibility to TuMV. The multidisciplinary approaches contribute to a better characterization andunderstanding of plant-virus interaction.
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https://tel.archives-ouvertes.fr/tel-01725515
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Bernadette Rubio. Réponse d’Arabidopsis thaliana au Turnip mosaic virus (TuMV) en conditions extérieures et en conditions contrôlées : phénotypage fin de traits de maladie et métaboliques et architecture génétique associée. Biologie végétale. Université de Bordeaux, 2017. Français. ⟨NNT : 2017BORD0758⟩. ⟨tel-01725515⟩

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