LEMAITRE-GUILLIER, Christelle; DUFRESNE, Christelle; CHARTIER, Agnès; CLUZET, Stephanie; VALLS FONAYET, Josep; JACQUENS, Lucile; DOUILLET, Antonin; AVELINE, Nicolas; ADRIAN, Marielle; DAIRE, Xavier

doi:10.3390/molecules26144258

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Article de revue

Ce document a été publié dans

Molecules. 2021-07-13, vol. 26, n° 14

Résumé en anglais

Grapevine is susceptible to fungal diseases generally controlled by numerous chemical fungicides. Elicitors of plant defence are a way of reducing the use of these chemicals, but still provide inconsistent efficiency. Easy-to-analyse markers of grapevine responses to elicitors are needed to determine the best conditions for their efficiency and position them in protection strategies. We previously reported that the elicitor sulphated laminarin induced the emission of volatile organic compounds (VOCs) by grapevine leaves. The present study was conducted to characterise and compare VOC emissions in response to other elicitors. Bastid® was first used to test the conditions of VOC collection and analysis. Using SBSE-GC-MS, we detected several VOCs, including the sesquiterpene ?-farnesene, in a time-dependent manner. This was correlated with the induction of farnesene synthase gene expression, in parallel with stilbene synthesis (another defence response), and associated to resistance against downy mildew. The other elicitors (Redeli®, Romeo®, Bion®, chitosan, and an oligogalacturonide) induced VOC emission, but with qualitative and quantitative differences. VOC emission thus constitutes a response of grapevine to elicitors of various chemical structures. Therefore, VOC analysis is relevant for studying the impact of environmental factors on grapevine defence responses and optimising the performance of elicitors in vineyards.< Réduire

Mots clés en anglais

Grapevine

Elicitor

Plant defence

Volatile organic compounds

Terpenes

Stir bar sorptive extraction SBSE-GC-MS

URI

https://oskar-bordeaux.fr/handle/20.500.12278/124180

DOI

http://dx.doi.org/10.3390/molecules26144258

Unités de recherche

Oenologie - UMR 1366

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Vocs are relevant biomarkers of elicitor-induced defences in grapevine

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Résumé en anglais

Mots clés en anglais

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