Pharmaceutical, food and cosmetic industries have shown great interest in grape seed extract due to its premium antioxidant activity with protective effects on human health. However, global climate change has already negatively affected the biochemistry and functionality of such nutraceutical crops. The present study was conducted to reveal the effects of sustained deficit irrigation on certain features of seed extracts obtained from the grape cultivar ‘Prima’ grafted on six genetically different rootstocks during two consecutive years. In both years, seed weight of ‘Prima’ grapes grafted on 5 BB significantly decreased in response to water treatments, although the other rootstocks did not impair the seed weight, except for 44–53 M in 217. Significant decreases in antioxidant activity of the scion cultivar occurred in response to DI when grafted on 5 BB in both years and in 44–53 M in 2017. However, the use of 99 R, 110 R and 140 Ru did not markedly impair the seed antioxidant activity in response to DI condition in both years. In both years, seed anthocyanins of FI vines were always higher than those of DI vines. In 2017, there were significant decreases in anthocyanins due to DI in vines grafted on 5 BB, 44–53 M, 99 R and 110 R. These rootstocks also led significant decreases in anthocyanins of the second year, while the use of 140 Ru and 1613 C rootstocks did not lead significant changes in anthocyanins in both two years. In 2017, total phenolics increased in response to DI, except for the vines grafted on 44–53 M. Rootstock-dependent changes in total phenolics in response to irrigation treatments were insignificant for the vines grafted on 5 BB and 44–53 M in both two experimental years. Averaged data showed that antioxidant activity showed significantly positive correlation with anthocyanins and total phenols. The findings are anticipated to guide future projects on enhancement of the quality and quantity of precious seconder metabolites with sustainable precision viticulture techniques to match the globally increasing demands on bioactive compounds.

制药，食品和化妆品行业对葡萄籽提取物表现出了浓厚的兴趣，因为葡萄籽提取物具有出色的抗氧化活性，对人体健康具有保护作用。但是，全球气候变化已经对这种营养作物的生物化学和功能产生了负面影响。进行本研究的目的是揭示连续两年持续亏缺灌溉对从嫁接到六种遗传不同根系上的葡萄品种'Prima'所获得种子提取物某些特征的影响。在这两个年份中，在5 BB上嫁接的'Prima'葡萄的种子重量都响应水处理而显着降低，尽管其他砧木并没有损害种子重量，除了217中的44–53M。在两年内和2017年在44–53 M上嫁接5 BB时，接穗品种的抗氧化活性均显着下降，这是由于去离子引起的。但是，使用99 R，110 R和140 Ru并没有明显损害种子两年中都响应DI条件的抗氧化活性。在这两年中，FI藤的种子花色苷总是高于DI藤的种子。2017年，由于在5 BB，44-53 M，99 R和110 R上嫁接的葡萄中的DI，花色苷显着减少。这些砧木还导致第二年花色苷的显着减少，而使用140 Ru和250 Ru在两年中，1613 C砧木均未导致花色苷的显着变化。2017年，除DI之外的总藤蔓嫁接在44–53 M上，总酚含量随DI的增加而增加。在两个实验年中，对5 BB和44-53 M嫁接的葡萄藤，根系总酚含量随灌溉处理的变化无关紧要。平均数据表明，抗氧化剂活性与花青素和总酚显着正相关。预期这些发现将指导未来的项目，采用可持续的精密葡萄栽培技术来提高珍贵的二级代谢物的质量和数量，以适应​​全球对生物活性化合物日益增长的需求。