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Vitis vinifera canes, a source of stilbenoids against downy mildew

dc.rights.licenseopenen_US
hal.structure.identifierUnité de Recherche Oenologie [Villenave d'Ornon] [OENO]
dc.contributor.authorRICHARD, Tristan
dc.contributor.authorABDELLI-BELHAD, Assia
dc.contributor.authorVITRAC, Xavier
hal.structure.identifierUnité de Recherche Oenologie [Villenave d'Ornon] [OENO]
dc.contributor.authorWAFFO TEGUO, Pierre
hal.structure.identifierUnité de Recherche Oenologie [Villenave d'Ornon] [OENO]
dc.contributor.authorMERILLON, Jean-Michel
dc.date.accessioned2021-04-21T13:04:46Z
dc.date.available2021-04-21T13:04:46Z
dc.date.issued2016-05-01
dc.identifier.issn2494-1271en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/27010
dc.description.abstractEnAim: To investigate the antifungal efficacy of grape cane extracts enriched in stilbenes against Plasmopara viticola by in vivo experiments on grape plants.Methods and results: Experiments on grape plants were carried out from 2007 to 2008 at commercial vineyards in « Le Tourne » (southwest region of France) on Vitis vinifera L. cv Merlot plants and in a greenhouse, where 45-day-old plants (Merlot) were used. Grapevine plants were treated with stilbene extract (STE) or « Bordeaux mixture » (BM) as positive control. STE, prepared from Vitis vinifera canes, contained 33% of total stilbenes ranging from monomers to tetramers and was used at 5 g L-1. The degree of protection against downy mildew was determined as the percentage of infected leaf surface area and pathogen attack frequency. On young plants in greenhouse, P. viticola inoculation and three treatments with STE were carried out. After the treatments, the disease reduction was from 59 to 69% for pathogen attack frequency and from 83 to 88% for infected leaf surface for the two modes of infestation (artificial and secondary). STE triggered a similar intense decrease in downy mildew infection as recorded for BM. In the vineyard assay, downy mildew infection was allowed to occur naturally. Field grown plants were treated every 7th day for eight weeks or every 14th day for eight weeks during June and July. We observed that STE was also able to prevent P. viticola infection in vineyard but to a lesser extent. Treatment with STE every 7th day provided better results in terms of infection frequency and infected leaf area than that every 14th day. STE treatment of plants every 7th day in vineyard reduced the frequency of attack by 16 to 39% and leaf surface infection by 57 to 61%, which was lower than that recorded for BM. STE also displayed in vitro inhibitory effects on the release of zoospores from sporangia and the germination of zoospores of P. viticola. Zoospore germination was completely inhibited at a concentration of 100 mg L-1 and zoospore release was inhibited at 330 mg L-1.Conclusions: Treatment of young grapevine plants in greenhouse with stilbene extract from grapevine canes offered considerable protection against P. viticola that was identical to that provided by Bordeaux mixture. STE was also able to prevent P. viticola infection in vineyard but to a lesser extent. Treatment with STE every 7th day in vineyard provided better results than that every 14th day.Significance and impact of the study: Stilbenes from grapevine canes are good candidates as natural fungicides against downy mildew. Given the very large quantity of grape canes available each year, this strategy could be scaled up to control this grapevine disease in a sustainable manner.
dc.language.isoENen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc/
dc.subjectcanne de raisin
dc.subjectvitis vinifera
dc.subjectbaie de raisin
dc.subjectstilbene
dc.title.enVitis vinifera canes, a source of stilbenoids against downy mildew
dc.typeArticle de revueen_US
dc.identifier.doi10.20870/oeno-one.2016.50.3.1178en_US
dc.subject.halSciences du Vivant [q-bio]/Biologie végétaleen_US
bordeaux.journalOENO Oneen_US
bordeaux.page137-143en_US
bordeaux.volume50en_US
bordeaux.hal.laboratoriesUnité de Recherche Oenologie - EA 4577en_US
bordeaux.issue3en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionBordeaux INPen_US
bordeaux.institutionINRAEen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-01602243
hal.version1
hal.exportfalse
workflow.import.sourcehal
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=OENO%20One&rft.date=2016-05-01&rft.volume=50&rft.issue=3&rft.spage=137-143&rft.epage=137-143&rft.eissn=2494-1271&rft.issn=2494-1271&rft.au=RICHARD,%20Tristan&ABDELLI-BELHAD,%20Assia&VITRAC,%20Xavier&WAFFO%20TEGUO,%20Pierre&MERILLON,%20Jean-Michel&rft.genre=article


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