Abstract
Grapevine canes are vine growing byproducts studied for their antimicrobial activities. These properties are directly connected to the stilbene content; oligomeric stilbenes being the most active. In this study, we propose a chemical process, based on oxidative coupling, using metals to increase the oligostilbene rate and the biological effectivity of cane extract against grapevine pathogens. A total of ten compounds were obtained and identified by combining LCMS and NMR spectroscopies, including four newly reported compounds: trans-oxistilbenin C, trans-oxistilbenin D, and cis- and trans-oxistilbenin E. The extract and the main stilbene formed were evaluated for their preventive effects on Plasmopara viticola and Botrytis cinerea growth. The processed extract was highly effective against both pathogens.
Highlights
Stilbenes are a group of polyphenols found in different plant species, especially Vitis vinifera, and playing the role of phytoalexins (Langcake & Pryce, 1977; Pezet et al, 2004; Rivière et al, 2012)
The purpose of this study is to directly apply an oxidative coupling strategy directly on a stilbene enriched extract obtained from grapevine canes to increase the extract antimicrobial activity
Since cane extract contains several different compounds with no more than 45% of stilbenes (Müller et al, 2009; Romain et al, 2014), the extract was firstly fractionated by centrifugal partition chromatography (CPC) following a procedure previously published (Biais et al, 2017)
Summary
Stilbenes are a group of polyphenols found in different plant species, especially Vitis vinifera (grapevine), and playing the role of phytoalexins (Langcake & Pryce, 1977; Pezet et al, 2004; Rivière et al, 2012). High antimicrobial activity of some stilbenes, especially stilbenes with oligomeric structure (dimers, trimers and tetramers) has been noted (Gabaston et al, 2017; Schnee et al, 2013). There is a growing interest in grapevine stilbenes, which can be sourced from vine growing byproducts, like grapevine canes and roots, for their antimicrobial potential and their likely use for fighting grapevine pathogens like Plasmopara viticola and Botrytis cinerea (Adrian et al, 1997; Billet et al, 2019; Gabaston et al, 2017; Richard et al, 2016; Schnee et al, 2013). Grapevine canes can be found in larger quantities in comparison with grapevine roots, due to the annual pruning of the plant
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
