Influence of Berry Heterogeneity on Phenolics and Antioxidant Activity of Grapes and Wines: A Primary Study of the New Winegrape Cultivar Meili (Vitis vinifera L.).
Influence of Berry Heterogeneity on Phenolics and Antioxidant Activity of Grapes and Wines: A Primary Study of the New Winegrape Cultivar Meili (Vitis vinifera L.).
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浆果异质性对葡萄和葡萄酒酚类物质和抗氧化活性的影响：酿酒葡萄新品种梅李（Vitis vinifera L.）的初步研究
DOI：
10.1371/journal.pone.0151276
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Zhang Z
中科院分区：
文献类型：
--
作者：
Liu X;Li J;Tian Y;Liao M;Zhang Z
酿酒葡萄通常在成熟时在葡萄园收获。然而，由于葡萄串和浆果周围的小气候不同，葡萄园中并非所有浆果都均匀成熟。以酿酒葡萄新品种梅莉（葡萄属vinifera L.）为试材，研究了在大陆性季风气候条件下，浆果异质性对葡萄和葡萄酒酚类物质含量和抗氧化能力的影响。果皮和葡萄酒中总酚、类黄酮、黄烷醇和单体花色素苷的含量随葡萄密度的增加而显著增加，但两种密度下的种子中总酚、类黄酮、黄烷醇和单体花色素苷的含量无显著差异。结果表明，在果皮、种子和葡萄酒中DPPH自由基清除能力、铜还原抗氧化能力和羟自由基清除能力最强的是野草莓。单个酚类化合物的总和在皮肤，种子和葡萄酒浆果密度增加，虽然没有显着差异的皮肤之间观察到两个较高的密度类。因此，在大陆性季风气候下，梅里葡萄和葡萄酒的化学成分与收获时的浆果密度呈正相关。
Wine grapes are usually harvested in vineyards when they ripen. However, not all of the berries in a vineyard ripen homogeneously because of different microclimates around the clusters and berries. In this study, the influence of berry heterogeneity on the phenolic content and antioxidant capacity of grapes and wines under a continental monsoon climate was evaluated for a new wine grape cultivar Meili (Vitis vinifera L.). The total phenolic, flavonoid, flavanol, and monomeric anthocyanin contents in the skin and wine significantly increased with grape density; however, there was no significant difference in the seeds between the two lower densities. The highest values of DPPH free radical-scavenging activity, cupric-reducing antioxidant capacity, and hydroxyl radical-scavenging activity in the skin, seed and wine were detected for the densest berries. The sum of individual phenolic compounds in skin, seed and wine increased with berry density, though no significant difference for skin was observed between the two higher density classes. Hence, the chemical components of Meili grapes and wines were positively associated with the berry density at harvest under the continental monsoon climate.