A laboratory incubation experiment was conducted to study the effects of different Cd2+ concentrations on seedling growth and phytohormone contents of glycine max through determining some physiological and biochemical indexes. The results showed as follows: (1) Different Cd2+ concentrations inhibited the synthesis of indoleacetic acid (IAA) and gibberellins (GA3) in roots and stimulated the synthesis of zeatin (Z) and abscisic acid (ABA) not only in roots but also in aerial parts of glycine max. Cd2+ stimulated the synthesis of IAA and GA3 in aerial parts at lower concentrations, but inhibited...