Influence of Salt Stress on Germination and Physiology of Soybean Seeds

To discuss the adaptability of soybean seeds to salt stress and the adaptive mechanism,the germination tests of most common breeds treated with 0,50,100,150 and 200 mmol/L salt stress(NaCl) were conducted in growth chambers.The results showed that low salt stress(50 mmol/L NaCl) promoted the seed germination,but high stress inhibited it and the inhibitive effects obviously increased with the increasing of NaCl concentration.The activity of SOD and POD in radicals and embryos of soybean seeds increased firstly and then decreased but the proline and MDA contents significantly increased as the NaCl concentration increased.These results indicated that soybean seed could survive on medium containing 50-100 mmol/L NaCl.By comparison,POD played a major role in resisting salt stress at germination stage.