ABSTRACT In this study, physicochemical changes, phenolics profile, and antioxidant potential in three grape varieties during berry development were assessed. The results showed a significant difference in stage-wise accumulation of phenolics. The fully matured Bangalore blue grapes showed the high total phenolic content (1484.87 mg GAE/100 g) followed by Krishna Sharad (1361.42 mg GAE/100 g) and Dilkhush variety (1108.61 mg GAE/100 g). The Krishna Sharad grapes contain the high anthocyanin content (1622.7 mg/kg) at full maturity. A similar pattern was observed for flavonoid content. The UPLC-PDA analysis showed that chlorogenic acid, catechin, epicatechin, and hesperidin were present in significant amount in Bangalore blue grape variety. In Krishna Sharad, gallic acid, chlorogenic acid, hesperidin, catechin, hesperetin were significant phenolics. Dilkhush grapes were rich in catechin, chlorogenic acid, and caffeic acid. The Bangalore blue and Krishna Sharad showed high antioxidant potential at full maturity in DPPH and ABTS activity. Collectively, the results suggest that berry development stages have an impact on its antioxidant properties, bioactive content, and berry composition.

中文翻译：

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浆果发育和成熟过程中彩色和白葡萄 (Vitis Vinifera L.) 品种的理化变化、酚类成分和抗氧化能力

摘要 本研究评估了三个葡萄品种在浆果发育过程中的理化变化、酚类成分和抗氧化潜力。结果表明，酚类物质的阶段积累存在显着差异。完全成熟的班加罗尔蓝葡萄的总酚含量较高（1484.87 毫克 GAE/100 克），其次是 Krishna Sharad（1361.42 毫克 GAE/100 克）和 Dilkhush 品种（1108.61 毫克 GAE/100 克）。克里希纳沙拉德葡萄在完全成熟时含有高含量的花青素（1622.7 毫克/公斤）。类黄酮含量观察到类似的模式。UPLC-PDA 分析表明，班加罗尔蓝葡萄品种中大量存在绿原酸、儿茶素、表儿茶素和橙皮苷。在 Krishna Sharad 中，没食子酸、绿原酸、橙皮苷、儿茶素、橙皮素是重要的酚类物质。Dilkhush 葡萄富含儿茶素、绿原酸和咖啡酸。班加罗尔蓝和克里希纳沙拉德在 DPPH 和 ABTS 活性完全成熟时显示出高抗氧化潜力。总的来说，结果表明浆果的发育阶段对其抗氧化特性、生物活性含量和浆果成分有影响。