Portu Javier, López Rosa, Santamaría Pilar, Garde-Cerdán Teresa
Instituto de Ciencias de la Vid y del Vino (CAR-CSIC-UR), Carretera de Burgos, km. 6, Finca La Grajera, 26007 Logroño, Spain.
Instituto de Ciencias de la Vid y del Vino (CAR-CSIC-UR), Carretera de Burgos, km. 6, Finca La Grajera, 26007 Logroño, Spain.
Food Chem. 2017 Dec 15;237:416-422. doi: 10.1016/j.foodchem.2017.05.126. Epub 2017 May 25.
Recent works showed that elicitation, supported by precursor feeding, could be a strategy to increase phenolic content. However, these studies have never been conducted in viticulture. This strategy could be of greater interest in Garnacha, a grape variety characterized by its low phenolic content. Therefore, this work studied elicitation with methyl jasmonate (MeJ), supported by precursor feeding with phenylalanine (Phe), in order to improve Garnacha grape phenolic content. Results showed that Phe+MeJ treatment did not improve phenolic content to a greater extent than the corresponding individual treatments. Overall, the greatest improvement was obtained with MeJ application, followed by Phe+MeJ; while Phe treatment barely increased phenolic compounds. Consequently, it was not possible to confirm the hypothesis that elicitation by MeJ could be supported by precursor feeding with Phe, when both applied together. This is the first study dealing with this matter under field conditions serving as basis for future works.
最近的研究表明，在前体饲喂的支持下进行诱导可能是一种增加酚类物质含量的策略。然而，这些研究从未在葡萄栽培中进行过。这种策略可能对歌海娜更有意义，歌海娜是一种酚类含量较低的葡萄品种。因此，本研究通过苯丙氨酸（Phe）前体饲喂支持，研究了茉莉酸甲酯（MeJ）诱导，以提高歌海娜葡萄的酚类含量。结果表明，Phe+MeJ处理在提高酚类含量方面并不比相应的单独处理有更大程度的提高。总体而言，施用MeJ获得的改善最大，其次是Phe+MeJ；而Phe处理几乎没有增加酚类化合物。因此，当两者一起应用时，无法证实MeJ诱导可以通过Phe前体饲喂得到支持这一假设。这是第一项在田间条件下处理该问题的研究，为未来的工作奠定了基础。
