Role Of Exogenous Melatonin In Table Grapes: First Evidence On Contribution To The Phenolics-Oriented Response
文献类型: 外文期刊
作者: Wang, L; Luo, ZS; Yang, MY; Li, D; Qi, M; Xu, YQ; Abdelshafy, AM; Ban, ZJ; Wang, FZ; Li, L
作者机构:
关键词: Amino Acid; Melatonin; Metabolism; Phenolics; Response; Vitis Vinifera
期刊名称: FOOD CHEMISTRY
ISSN: 0308-8146
年卷期: 2020 年 329 卷
页码:
收录情况: JCR(2021版) ; EI(2021版)
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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