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Polyphenols and resveratrol from discarded leaf biomass of grapevine (Vitis sp.): Effect of cultivar and viticultural practices in Estonia

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dc.contributor.authorRätsep, Reelika
dc.contributor.authorKarp, Kadri
dc.contributor.authorMaante-Kuljus, Mariana
dc.contributor.authorAluvee, Alar
dc.contributor.authorBhat, Rajeev
dc.contributor.departmentERA Chair for Food (By-) Products Valorisation Technologies (Valortech). Estonian University of Life Scienceseng
dc.contributor.departmentInstitute of Agricultural and Environmental Sciences. Polli Horticultural Research Centreeng
dc.contributor.departmentInstitute of Agricultural and Environmental Sciences. Estonian University of Life Scienceseng
dc.date.accessioned2020-09-14T10:31:48Z
dc.date.available2020-09-14T10:31:48Z
dc.date.issued2020
dc.description.abstractGrapevine leaves are a major by-product of viticulture practices derived from the leaf-removal from the fruit cluster zone in all vine growing regions. These leaves can be a valuable source of antioxidants to be used in pharmaceuticals or other health-related products. In this study, the leaves of grapevine cultivars were analysed by ultra-high performance liquid chromatograph-diode array detector () for the total polyphenols (TPC) and resveratrol a ected by cultivar, leaf-removal time and viticultural practice. The e ect of cultivar varied yearly, European grapevine cv. ‘Regent’ had increased TPC and resveratrol in comparison to ‘Boskoop’s Glory’, ‘Rondo’ and ‘Solaris’ in 2017, but ‘Solaris’ in 2018. TPC (1213–1841 mg 100 g-1) and resveratrol (1.061 mg 100 g-1) were higher in leaves of interspecific hybrid cvs. ‘Zilga’ and ‘Hasansky Sladky’ during full fruit ripeness. Cv. ‘Rondo’ grown under the polytunnel had decreased TPC in leaves. In conclusion, cultivar selection, viticultural practice and leaf-removal time contribute significantly to the accumulation of total polyphenols and resveratrol. Results of this study will contribute to better utilization of biomass produced in the vineyards, help to decrease the negative environmental impacts, and provide an overview on various factors a ecting the biochemical constituents, especially in leaves.eng
dc.description.abstractThis research is funded by VALORTECH project, which has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 810630.eng
dc.description.sponsorshipThis research is funded by VALORTECH project, which has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 810630.eng
dc.identifier.publicationAgriculture 2020, 10, 393eng
dc.identifier.urihttp://hdl.handle.net/10492/6177
dc.identifier.urihttps://doi.org/10.3390/agriculture10090393
dc.publisherMDPIeng
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0) ; openAccesseng
dc.rights© 2020 by the authors.eng
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectVitis interspecific hybridseng
dc.subjectgrapevine leaveseng
dc.subjectby-products of grapeeng
dc.subjectpolyphenolseng
dc.subjectarticleseng
dc.titlePolyphenols and resveratrol from discarded leaf biomass of grapevine (Vitis sp.): Effect of cultivar and viticultural practices in Estoniaeng
dc.typeArticleeng

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