Diurnal variation of melatonin content in sweet cherry leavesTian Shen, Xin Wang, Hongxia Tu, Xuefeng Zhang, Fangren Liu, Gui-hong Zhou, Dong Liang and Hui XiaE3S Web Conf., 145 (2020) 01022DOI: https://doi.org/10.1051/e3sconf/202014501022