Role of exogenous melatonin in table grapes: First evidence on contribution to the phenolics-oriented response

文献类型： 外文期刊

第一作者： Wang, Lei

作者： Wang, Lei;Luo, Zisheng;Yang, Mingyi;Li, Dong;Qi, Ming;Xu, Yanqun;Abdelshafy, Asem Mahmoud;Li, Li;Wang, Lei;Luo, Zisheng;Yang, Mingyi;Li, Dong;Qi, Ming;Xu, Yanqun;Li, Li;Luo, Zisheng;Li, Li;Luo, Zisheng;Li, Li;Luo, Zisheng;Li, Li;Ban, Zhaojun;Wang, Fengzhong

作者机构：

关键词： Amino acid; Melatonin; Metabolism; Phenolics; Response; Vitis vinifera

期刊名称：FOOD CHEMISTRY （ 影响因子：7.514； 五年影响因子：7.516 ）

ISSN： 0308-8146

年卷期： 2020 年 329 卷

页码：

收录情况： SCI

摘要： Melatonin (MLT) has gained increasing attention due to its pleiotropic effects. In present study, `Kyoho' grapes were immersed in 200 mu M of MLT to investigate the role of exogenous melatonin in postharvest metabolism response. Results indicated that berry abscission and rotten index was reduced by 37.50% and 58.37%, respectively, by exogenous MLT treatment, while the amino acid accumulation was greatly enhanced. Furthermore, the endogenous MLT biosynthesis was activated, where the transcript expression of genes, encoding tryptophan decarboxylase, tryptophan decarboxylase, N-acetylserotonin methyltransferase and N-acetyltransferae were upregulated significantly (p < 0.05), in accordance with the increase of endogenous MLT. Phenolic biosynthesis related genes were upregulated significantly, accompanied with the significantly higher phenolics content (p < 0.05). On day 15, the expression level of phenylalanine ammonia-lyase in MLT-treated group was twice of that in control. Therefore, this study provides the first evidence pertinent to the contribution of exogenous melatonin to the phenolics metabolism in postharvest table grape.

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