Cadmium pollution has great influences on physiology and ecology of legume crops.Low concentrations of Cd can boost the biomass,plant height,and root length of legume crops,but high concentrations Cd have restraining effects.Usually,Cd contents in different organs of legume crops follow the sequence of root stem leaf grain.Cd stress can markedly change the subcellular structure and DNA,and can induce cell senescence.Due to regulation of the protective enzymes such as superoxide dismutase（SOD）,catalase（CAT）,and peroxidase（POD）,the peroxida...
