Cluster bagging promotes melatonin biosynthesis in the berry skins of Vitis vinifera cv. Cabernet Sauvignon and Carignan during development and ripening.

Autor: Guo SH; Shaanxi Engineering Research Center for Viti-Viniculture, College of Enology/College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China., Xu TF; Shaanxi Engineering Research Center for Viti-Viniculture, College of Enology/College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China., Shi TC; Shaanxi Engineering Research Center for Viti-Viniculture, College of Enology/College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China., Jin XQ; Shaanxi Engineering Research Center for Viti-Viniculture, College of Enology/College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China., Feng MX; Shaanxi Engineering Research Center for Viti-Viniculture, College of Enology/College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China., Zhao XH; College of Life Sciences and Enology, Taishan University, Taian, Shandong 271021, China., Zhang ZW; Shaanxi Engineering Research Center for Viti-Viniculture, College of Enology/College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China; Heyang Experimental and Demonstrational Stations for Grape, Northwest A&F University, Heyang, Shaanxi 715300, China. Electronic address: zhangzhw60@nwsuaf.edu.cn., Meng JF; Shaanxi Engineering Research Center for Viti-Viniculture, College of Enology/College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China; Heyang Experimental and Demonstrational Stations for Grape, Northwest A&F University, Heyang, Shaanxi 715300, China. Electronic address: mjfwine@nwsuaf.edu.cn.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2020 Feb 01; Vol. 305, pp. 125502. Date of Electronic Publication: 2019 Sep 10.
DOI: 10.1016/j.foodchem.2019.125502
Abstrakt: Melatonin, a tryptophan derivative, is an important functional component in grape berries. We investigated the effect of cluster bagging on melatonin biosynthesis in the berries of two wine grape cultivars, Cabernet Sauvignon and Carignan, during fruit development and ripening. Cluster bagging delayed fruit coloring and ripening, and bag-treated berries of both grape cultivars synthesized more melatonin and most of the precursor compounds including L-tryptophan, N-acetylserotonin, tryptamine, and serotonin compared to those exposed to light (control) conditions. Interestingly, 5-methoxytryptamine was only detected in the berries of Carignan and not of Cabernet Sauvignon, both in the cluster bagging and control groups. In addition, melatonin and most of its precursors, decreased after veraison. VvSNAT1 and VvT5H expression levels were positively correlated with melatonin content. Our findings suggested that melatonin synthesis pathways differ among grape cultivars, and that VvSNAT1 and VvT5H may show key regulatory roles in the melatonin synthesis of grape berries.
(Copyright © 2019 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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