Effects of exogenous indole-3-acetic acid on the growth and cadmium accumulation of lettuce under cadmium stressLe Liang, Wanjia Tang, Xuemei Peng, Jing Lu, Han Liu and Yi TangE3S Web Conf., 136 (2019) 07002DOI: https://doi.org/10.1051/e3sconf/201913607002