Effects of NaCl Stress on Physiological and Biochemical Characters of Glycine soja

The antioxidative system and osmotic regulation are two main factors affecting plant progress under NaCl stress.The effects of NaCl stress on the antioxidative system and osmotic regulation in the seedlings of Glycine soja were studied in this paper.The results showed that the activities of superoxide dismutase(SOD),peroxidase(POD)had similar trend,which was increasing firstly,then decreasing with NaCl concentrations from 0 up to 200 mmol·L-1.The catalase(CAT)activity decreased with the increasing of NaCl concentrations;The contents of MDA not varied evidently firstly and then increased evidently(100-200 mmol·L-1NaCl).The contents of MDA were the highest when the NaCl concentration was 200 mmol L-1.The contents of proline increased with the increasing of NaCl concentrations,and soluble sugar decreased firstly,then increased evidently with the increasing of NaCl concentrations as well.It was thus suggested that POD and SOD and osmotic regulation capacity of proline(Pro)play an important role in Glycine soja resistant to NaCl stress.