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Article dans une revue
Mechanical stress rapidly induces E-resveratrol and E-piceatannol biosynthesis in grape canes stored as a freshly-pruned byproduct
Abstract : Grape canes represent a promising source of bioactive phytochemicals. However the stabilization of the raw material after pruning remains challenging. We recently reported the induction of stilbenoid metabolism after winter pruning including a strong accumulation of E-resveratrol and E-piceatannol during the first six weeks of storage. In the present study, the effect of mechanical wounding on freshly-pruned canes was tested to increase the induction of stilbenoid metabolism. Cutting the grape canes in short segments immediately after pruning triggered a transient expression of phenylalanine ammonia-lyase (PAL) and stilbene synthase (STS) genes, followed by a rapid accumulation of E-resveratrol and E-piceatannol. The degree of stilbenoid induction was related to the intensity of mechanical wounding. Data suggest that a global defense response is triggered involving jasmonate signaling, PR proteins and stilbenoid metabolism. Mechanica
https://hal.univ-angers.fr/hal-02407075
Contributeur : Nathalie Clement Connectez-vous pour contacter le contributeur
Soumis le : jeudi 12 décembre 2019 - 12:53:03
Dernière modification le : mardi 5 avril 2022 - 08:58:04
Contributeur : Nathalie Clement Connectez-vous pour contacter le contributeur
Soumis le : jeudi 12 décembre 2019 - 12:53:03
Dernière modification le : mardi 5 avril 2022 - 08:58:04