Huangzhao Chen, Jun Yang, Xiaoxu Deng, Yujuan Lei, Sha Xie, Shuihuan Guo, Ruihua Ren, Junnan Li, Zhengwen Zhang, Tengfei Xu.Foliar-sprayed manganese sulfate improves flavonoid content in grape berry skin of Cabernet Sauvignon (Vitis vinifera L.) growing on alkaline soil and wine chromatic characteristics

Foliar-sprayed manganese sulfate improves flavonoid content in grape berry skin of Cabernet Sauvignon (Vitis vinifera L.) growing on alkaline soil and wine chromatic characteristics

Huangzhao Chen, Jun Yang, Xiaoxu Deng, Yujuan Lei, Sha Xie, Shuihuan Guo, Ruihua Ren, Junnan Li, Zhengwen Zhang, Tengfei Xu

Food Chemistry

DOI:10.1016/j.foodchem.2020.126182

Abstract :Flavonoids are key determinants of grape quality and wine color. Grapevines growing in alkaline soil are prone to manganese deficiency, which can decrease the contents of secondary metabolites, including flavonoids. We determined the effects of a foliar Mn treatment (MnSO4·H2O) of Cabernet Sauvignon grapevines (V. vinifera L.) growing in alkaline soil on the flavonoid contents in grape skin, and the quality of wine. The Mn treatments were applied in 2017 and 2018, and tended to increase the grape sugars, berry weight, and the contents of phenolic compounds from veraison until harvest. The Mn treatments increased the amounts of acetylated, methylated, and total anthocyanins, as well as the total flavonol contents in grape berry skin at harvest. The wines prepared from these grapes had a higher color intensity than those prepared from grapes from control vines. Foliar-applied MnSO4·H2O can promote flavonoid biosynthesis in grape berries, and improve the color of wine.

Qiong He, Yanjing Ren, Wenbin Zhao, Ru Li and Lugang Zhang.Low Temperature Promotes Anthocyanin Biosynthesis and Related Gene Expression in the Seedlings of Purple Head Chinese Cabbage (Brassica rapa L.).