Exogenous L-tryptophan treatment increases the concentrations of melatonin and aroma compounds in grape berries and wine  

作　　者：Guangqing Xiang Runpu Jia Fei Wang Shengnan Wang Yifan Li Yuxin Yao 

机构地区：[1]State Key Laboratory of Crop Biology,Key Laboratory of Biology and Genetic Improvement of Horticultural Crops in Huang-Huai Region,Ministry of Agriculture,College of Horticulture Science and Engineering,Shandong Agricultural University,Taian,China

出　　处：《Food Quality and Safety》2024年第3期534-544,共11页食品品质与安全研究（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2022YFD2100100);Agriculture Improved Variety Project of Shandong Province(No.2020LZGC008);Major Project of Science and Technology of Shandong Province(No.2022CXGC010605);Fruit Industrial Technology System of Shandong Province(No.SDAIT-06-03);the Key Research and Development Program of Shandong Province(No.2022TZXD0011),China.

摘　　要：L-Tryptophan(Trp)is a substrate for the biosynthesis of melatonin,and melatonin is a signal molecule that alters the secondary metabolite profile;whether Trp treatments promote the biosynthesis of melatonin to regulate aroma compounds in grape berries and wine remains unclear.Here,the content of melatonin was higher in Marselan grapes and wine than that in other grape cultivars.Marselan grapes were subjected to 30 different Trp treatments.The content of melatonin and aroma compounds in Marselan grapes was increased by several treatments.Increases in the content of volatiles were mainly driven by increases in aldehydes.Hexanal,the most abundant aldehyde compound,was the main contributor to increases in aldehydes following Trp treatment.The results of our study indicate that the root application of 250 mg/L L-tryptophan during the fruiting expansion stage and the spraying application of 50 mg/L L-tryptophan spray during the veraison stage were the optimal treatments because the content of melatonin and aroma compounds,as well as other basic quality parameters,were highest in Trp-treated grape berries and wine in these treatments.Overall,these two effective Trp treatments could be used to enhance the content of melatonin and aroma compounds in Marselan grapes,and this could increase the economic value of this cultivar.

关 键 词：Marselan grape L-TRYPTOPHAN MELATONIN aroma compounds WINE 

分 类 号：TS261.1[轻工技术与工程—发酵工程]