Polyphenols and resveratrol from discarded leaf biomass of grapevine (Vitis sp.): Effect of cultivar and viticultural practices in Estonia
Laen...
Kuupäev
2020
Kättesaadav alates
Autorid
Rätsep, Reelika
Karp, Kadri
Maante-Kuljus, Mariana
Aluvee, Alar
Bhat, Rajeev
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
MDPI
Abstrakt
Grapevine 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.
This 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.
This 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.
Kirjeldus
Märksõnad
Vitis interspecific hybrids, grapevine leaves, by-products of grape, polyphenols, articles