Effects of the reciprocal grafting on the photosynthesis of two genotypes tomato offspring under selenium stressShiyao Shan, Huizhong Luo, Jinpeng Zhu, Zhiyu Li and Huanxiu LiE3S Web Conf., 136 (2019) 07008DOI: https://doi.org/10.1051/e3sconf/201913607008