Effects of water stress on endogenous hormones and free polyamines in different tissues of grapevines (Vitis vinifera L. cv. ‘Merlot’) Posted on 4 October 2023 by Zhennan Zhan Zhennan Zhan, Ning Wang, Zumin Chen, Yanxia Zhang, Kangqi Geng, Dongmei Li, Zhenping Wang