Polyphenols and Resveratrol from Discarded Leaf Biomass of Grapevine (<i>Vitis</i> sp.): Effect of Cultivar and Viticultural Practices in Estonia
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 g...
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MDPI AG
2020-09-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/10/9/393 |
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| author | Reelika Rätsep Kadri Karp Mariana Maante-Kuljus Alar Aluvee Rajeev Bhat |
| author_facet | Reelika Rätsep Kadri Karp Mariana Maante-Kuljus Alar Aluvee Rajeev Bhat |
| author_sort | Reelika Rätsep |
| collection | DOAJ |
| description | 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 affected by cultivar, leaf-removal time and viticultural practice. The effect 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<sup>−1</sup>) and resveratrol (1.061 mg 100 g<sup>−1</sup>) 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 affecting the biochemical constituents, especially in leaves. |
| first_indexed | 2024-03-10T16:33:33Z |
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| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-10T16:33:33Z |
| publishDate | 2020-09-01 |
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| series | Agriculture |
| spelling | doaj.art-096dca61cc224c69895e86baef6939672023-11-20T12:38:42ZengMDPI AGAgriculture2077-04722020-09-0110939310.3390/agriculture10090393Polyphenols and Resveratrol from Discarded Leaf Biomass of Grapevine (<i>Vitis</i> sp.): Effect of Cultivar and Viticultural Practices in EstoniaReelika Rätsep0Kadri Karp1Mariana Maante-Kuljus2Alar Aluvee3Rajeev Bhat4ERA Chair for Food (By-) Products Valorisation Technologies (Valortech), Estonian University of Life Sciences, Fr. R. Kreutzwaldi 1a, 51014 Tartu, EstoniaInstitute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 1, 51006 Tartu, EstoniaInstitute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Fr. R. Kreutzwaldi 1, 51006 Tartu, EstoniaInstitute of Agricultural and Environmental Sciences, Polli Horticultural Research Centre, Uus 2, 69108 Polli, EstoniaERA Chair for Food (By-) Products Valorisation Technologies (Valortech), Estonian University of Life Sciences, Fr. R. Kreutzwaldi 1a, 51014 Tartu, EstoniaGrapevine 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 affected by cultivar, leaf-removal time and viticultural practice. The effect 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<sup>−1</sup>) and resveratrol (1.061 mg 100 g<sup>−1</sup>) 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 affecting the biochemical constituents, especially in leaves.https://www.mdpi.com/2077-0472/10/9/393<i>Vitis</i> interspecific hybridsgrapevine leavesby-products of grapepolyphenols |
| spellingShingle | Reelika Rätsep Kadri Karp Mariana Maante-Kuljus Alar Aluvee Rajeev Bhat Polyphenols and Resveratrol from Discarded Leaf Biomass of Grapevine (<i>Vitis</i> sp.): Effect of Cultivar and Viticultural Practices in Estonia Agriculture <i>Vitis</i> interspecific hybrids grapevine leaves by-products of grape polyphenols |
| title | Polyphenols and Resveratrol from Discarded Leaf Biomass of Grapevine (<i>Vitis</i> sp.): Effect of Cultivar and Viticultural Practices in Estonia |
| title_full | Polyphenols and Resveratrol from Discarded Leaf Biomass of Grapevine (<i>Vitis</i> sp.): Effect of Cultivar and Viticultural Practices in Estonia |
| title_fullStr | Polyphenols and Resveratrol from Discarded Leaf Biomass of Grapevine (<i>Vitis</i> sp.): Effect of Cultivar and Viticultural Practices in Estonia |
| title_full_unstemmed | Polyphenols and Resveratrol from Discarded Leaf Biomass of Grapevine (<i>Vitis</i> sp.): Effect of Cultivar and Viticultural Practices in Estonia |
| title_short | Polyphenols and Resveratrol from Discarded Leaf Biomass of Grapevine (<i>Vitis</i> sp.): Effect of Cultivar and Viticultural Practices in Estonia |
| title_sort | polyphenols and resveratrol from discarded leaf biomass of grapevine i vitis i sp effect of cultivar and viticultural practices in estonia |
| topic | <i>Vitis</i> interspecific hybrids grapevine leaves by-products of grape polyphenols |
| url | https://www.mdpi.com/2077-0472/10/9/393 |
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