Dual mode of action of grape cane extracts against <em>Botrytis cinerea</em> - Université de Bourgogne Accéder directement au contenu
Article Dans Une Revue Journal of Agricultural and Food Chemistry Année : 2019

Dual mode of action of grape cane extracts against Botrytis cinerea

Résumé

Crude extracts of Vitis vinifera canes represent a natural source of stilbene compounds with well characterized antifungals properties. In our trials, exogenous application of a stilbene extract (SE) obtained from grape canes on grapevine leaves reduces the necrotic lesions caused by Botrytis cinerea. The SE showed to possess a direct antifungal activity by inhibiting the mycelium growth. The activation of some grapevine defense mechanism was also investigated. H2O2 production and activation of mitogen-activated protein kinase (MAPK) phosphorylation cascades as well as accumulation of stilbenoid phytoalexins were explored on grapevine cell suspension. Moreover, the transcription of genes encoding for proteins affecting defense responses was analyzed on grapevine plants. The SE induced some grapevine defense mechanisms including MAPK activation, and the expression of pathogenesis-related (PR) genes and of a gene encoding the glutathione-S-transferase 1 (GST1). By contrast, treatment of grapevine leaves with SE negatively regulates de novo stilbene production.
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Dates et versions

hal-02618908 , version 1 (25-05-2020)

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Gicele Sbardelotto de Bona, Marielle Adrian, Jonathan Negrel, Annick Chiltz, Agnès Klinguer, et al.. Dual mode of action of grape cane extracts against Botrytis cinerea. Journal of Agricultural and Food Chemistry, 2019, 67 (19), pp.5512-5520. ⟨10.1021/acsjafc.8b07098⟩. ⟨hal-02618908⟩
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