Gutiérrez-Gamboa Gastón, Portu Javier, López Rosa, Santamaría Pilar, Garde-Cerdán Teresa
Instituto de Ciencias de la Vid y del Vino (CSIC-CAR-UR), Ctra. de Burgos, Logroño, Spain.
J Sci Food Agric. 2018 Apr;98(6):2341-2349. doi: 10.1002/jsfa.8725. Epub 2017 Nov 14.
Elicitors and nitrogen foliar applications to vineyards could regulate grape nitrogen composition, which has an important effect on grape and wine quality. Thus the aim of this research was to study the effect of foliar elicitor treatments, methyl jasmonate (MeJ) and yeast extract (YE), and foliar nitrogen applications, urea (Ur) and phenylalanine (Phe), to Garnacha, Graciano and Tempranillo vines on grape amino acid composition.
The results showed that elicitor and nitrogen foliar applications to Garnacha and Tempranillo grapevines decreased the must amino acid concentration. However, Phe application to these two grapevines increased the must Phe content. The treatments applied to Graciano grapevines barely effected the grape amino acid content. According to the percentage of variance attributable, the variety had a higher impact on the must amino acid composition than the treatments and their interaction, except in certain amino acids such as Phe.
The influence of elicitor and nitrogen foliar applications to grapevines on grape amino acid concentration was strongly conditioned by the variety. © 2017 Society of Chemical Industry.
向葡萄园施用诱导剂和进行叶面施氮可调节葡萄的氮组成，这对葡萄和葡萄酒品质有重要影响。因此，本研究的目的是研究向歌海娜、格拉西亚诺和丹魄葡萄藤叶面喷施诱导剂（茉莉酸甲酯（MeJ）和酵母提取物（YE））以及叶面施氮（尿素（Ur）和苯丙氨酸（Phe））对葡萄氨基酸组成的影响。
结果表明，向歌海娜和丹魄葡萄藤喷施诱导剂和叶面施氮降低了葡萄汁中的氨基酸浓度。然而，向这两种葡萄藤施用苯丙氨酸增加了葡萄汁中的苯丙氨酸含量。施用于格拉西亚诺葡萄藤的处理对葡萄氨基酸含量几乎没有影响。根据可归因的方差百分比，除了某些氨基酸（如苯丙氨酸）外，品种对葡萄汁氨基酸组成的影响大于处理及其相互作用。
向葡萄藤喷施诱导剂和叶面施氮对葡萄氨基酸浓度的影响受品种的强烈制约。©2017化学工业协会。
