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Pathogenicity traits correlate with the susceptible Vitis vinifera leaf physiology transition in the biotroph fungus Erysiphe necator: An adaptation to plant ontogenic resistance

dc.rights.licenseopenen_US
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorCALONNEC, Agnes
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorJOLIVET, Jerome
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorVIVIN, Philippe
IDREF: 176143106
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorSCHNEE, Sylvain
dc.date.accessioned2020-04-10T09:28:38Z
dc.date.available2020-04-10T09:28:38Z
dc.date.issued2018
dc.identifier.issn1664-462Xen_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/4219
dc.description.abstractEnHow and when the pathogen cycle is disrupted during plant development is crucial for harnessing ontogenic resistance in sustainable agriculture. Ontogenic resistance against powdery mildew (Erysiphe necator) was quantified on Vitis vinifera. Shoots were sampled in the vineyard at several dates during seasonal growth and processed in the laboratory under controlled conditions. Experiments were conducted on two susceptible Vitis vinifera Cabernet Sauvignon and Merlot. The process of leaf ontogenic resistance was investigated by measuring three quantitative traits of pathogenicity: the infection efficiency, sporulation and mycelium growth. Morphological and physiological plant indicators were used to identify leaf changes that resulted in ontogenic resistance and to predict pathogen variations that were linked to pathogenicity traits. The process of ontogenic resistance was established early in correspondence with the physiological transition of the leaf from sink to source status and was characterised by its increase in sugar content. The three traits of pathogenicity that we measured were affected, and their variation was strongly correlated with leaf age. Using leaf age, we were able to accurately predict the susceptibility of the leaf: a leaf aged, on average, 13.3 days had a very high probability (0.8) of being susceptible, while this probability decreased to 0.5 one week later. Sporulation was more closely correlated with variations in sugar and the infection efficiency in leaf water. The results for both cultivars were consistent. Ontogenic resistance on grapevine leaves is thus interpreted to be a strong, immutable physiological process that Erysiphe necator is able to circumvent by restricting its development to sink tissue. Future research should explore how this native plant resistance can be incorporated into grape management strategies to better control powdery mildew (PM) epidemics with reduced amounts of fungicides.
dc.language.isoENen_US
dc.title.enPathogenicity traits correlate with the susceptible Vitis vinifera leaf physiology transition in the biotroph fungus Erysiphe necator: An adaptation to plant ontogenic resistance
dc.title.alternativeFront. plant sci.en_US
dc.typeArticle de revueen_US
dc.identifier.doi10.3389/fpls.2018.01808en_US
dc.subject.halSciences du Vivant [q-bio]/Biologie végétaleen_US
bordeaux.journalFrontiers in Plant Scienceen_US
bordeaux.page1-17en_US
bordeaux.volume9en_US
bordeaux.hal.laboratoriesEcophysiologie et Génomique Fonctionnelle de la Vigne (EGFV) - UMR 1287en_US
bordeaux.institutionBordeaux Sciences Agroen_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
hal.identifierhal-02539627
hal.version1
hal.date.transferred2020-04-10T09:28:42Z
hal.exporttrue
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