Macrowine 2021
IVES 9 IVES Conference Series 9 Grape byproducts as source of resveratrol oligomers for the development of antifungal extracts

Grape byproducts as source of resveratrol oligomers for the development of antifungal extracts

Abstract

Grape canes are a non-recycled byproduct of wine industry (1-5 tons per hectare per year) containing valuable phytochemicals of medicine and agronomical interest. Resveratrol and wine polyphenols are known to exert a plethora of health-promoting effects including antioxidant capacity, cardioprotection, anticancer activity, anti-inflammatory effects, and estrogenic/antiestrogenic properties (Guerrero et al. 2009). Additionally, resveratrol is a major phytoalexin produced by plants in response to various stresses and promotes disease resistance (Chang et al. 2011). Our project aims to develop polyphenol-rich grape cane extracts to fight phytopathogenic or clinically relevant fungi. We initiate the project with the development of analytical methods to analyze resveratrol mono- and oligomers (dimers, trimers and tetramers) from grape canes and we evaluate their potential activity against clinically relevant opportunistic fungal pathogens (Houillé et al. 2014). We investigated the impact of health status in vineyards on the composition of stilbenoids in winter-harvested grape canes. We observed that the degree of downy mildew infection in vineyard plots may alter the composition and distribution of stilbenes in different tissues of pruned byproducts (Houillé et al. 2015a). We also considered the evolution of stilbenoids in grape canes during post-harvest storage. Interestingly, we observed an accumulation of E-resveratrol and E-piceatannol related to a de novo biosynthesis in pruned wood grapes (Houillé et al. 2015b). Our results prompt us to better understand the natural variation of stilbenoid composition in grape canes and to consider grape byproducts as a promising source of bioactives substances.

Guerrero et al (2009) Natural Product Communications 4 (5):635-658. Chang et al(2011) Plos One 6 (10). Houillé et al(2014) Journal of Natural Products 77: 1658-1662. Houillé et al (2015a) Journal of Agricultural and Food Chemistry 63: 1631-1638. Houillé et al(2015b) Journal of Agricultural and Food Chemistry 63: 8472-8477.

Publication date: May 17, 2024

Issue: Macrowine 2016

Type: Poster

Authors

Arnaud Lanoue*

*Université de Tours

Contact the author

Tags

IVES Conference Series | Macrowine | Macrowine 2016

Citation

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