Resveratrol synthesis under natural conditions and after UV-C irradiation in berry skin is associated with berry development stages in 'Beihong' (V. vinifera x V. amurensis)

卷:168

Wang, Jun-Fang ; Ma, Ling ; Xi, Hui-Fen ; Wang, Li-Jun ; Li, Shao-Hua

Chinese Acad Sci

关键词: UV-C;    Grape berry;    Development;    Resveratrol;    Stilbene synthesis;   

DOI  :  10.1016/j.foodchem.2014.07.025

学科分类：食品科学和技术

【 摘 要 】

Though UV-C irradiation may induce the synthesis of resveratrol in grape berry skins, it is unclear which developmental stage is most sensitive to UV-C induction. In this study, we investigated resveratrol content and gene expression of 'Beihong' (Vitis vinifera x Vitis amurensis) berries by UV-C irradiation compared with under natural conditions during different developmental stages. Under natural condition, resveratrol synthesis was related to veraison. Before veraison, resveratrol content was very low; however, total resveratrol increased about 500% from veraison to maturity in the main forms of piceids. UV-C irradiation significantly stimulated resveratrol synthesis, mainly in the form of trans-resveratrol. Young berries at 55 days after anthesis were most sensitive to UV-C irradiation, the total resveratrol in the skin of UV-C irradiated berry is about 90 times higher than that of the control; however, resveratrol synthesis subsequently declined, which may be attributed to STS regulation by Myb14. (C) 2014 Elsevier Ltd. All rights reserved.