Analysis of melatonin content and gene expression in Chinese cherry leaves Xin Wang, Tian Shen, Xuefeng Zhang, Peng Hu, Hongxia Tu, Gui-hong Zhou, Dong Liang and Hui Xia E3S Web Conf., 145 (2020) 01019 Published online: 06 February 2020 DOI: 10.1051/e3sconf/202014501019