Instituto de Ciencias de la Vid y del Vino, (Gobierno de La Rioja, Universidad de La Rioja, Consejo Superior de Investigaciones Científicas) , Carretera de Mendavia-Logroño NA 134, km 90, 26071 Logroño, La Rioja, Spain.
J Agric Food Chem. 2015 Mar 4;63(8):2328-37. doi: 10.1021/jf5060672. Epub 2015 Feb 23.
The importance of phenolic compounds for grape and wine quality has drawn attention to studying different practices with the aim of increasing their content. Cluster application of elicitors is a viticultural practice that has shown promising results in recent years. However, cluster application requires a previous defoliation, which is time-consuming and expensive. In the present study, methyl jasmonate was foliar applied to Tempranillo grapevines in order to study its effect on grape and wine phenolic composition. Methyl jasmonate foliar application increased anthocyanin and stilbene content in both grape and wine, besides enhancing wine flavonol content. This treatment induced the synthesis of 3-O-glucosides of petunidin and peonidin and trans-p-coumaroyl derivatives of cyanidin and peonidin. For stilbenes, trans-piceid content was considerably increased in both grape and wine. The results obtained suggest that methyl jasmonate foliar application could be a simple and accessible practice to enhance grape and wine quality.
酚类化合物对葡萄和葡萄酒质量的重要性引起了人们对研究不同实践的关注，以期增加其含量。 刺激物的簇应用是近年来显示出有希望结果的葡萄栽培实践。 然而，簇应用需要预先进行叶片去除，这既费时又昂贵。 在本研究中，茉莉酸甲酯被叶面施用于 Tempranillo 葡萄藤，以研究其对葡萄和葡萄酒酚类成分的影响。 茉莉酸甲酯叶面喷施增加了葡萄和葡萄酒中的花色苷和芪类物质含量，同时还提高了葡萄酒类黄酮含量。 这种处理诱导了矢车菊素和芍药素的 3-O-葡萄糖苷以及矢车菊素和芍药素的反式对香豆酰衍生物的合成。 对于芪类物质，葡萄和葡萄酒中反式白藜芦醇的含量大大增加。 所得结果表明，茉莉酸甲酯叶面喷施可能是一种简单易行的方法，可以提高葡萄和葡萄酒的质量。
