Effects of exogenous NO on germination and seedling growth of Medicago ruthinica seeds under NaCl stress

In order to explore the pathway of Medicago ruthinica seeds to regulate the salt tolerance in germination period,the influence of exogenous NO on seed germination and seedling growth of M.ruthinica were studied under NaCl stress.The result indicated that NaCl solution of 150mmol/L inhibited seeds germination and reduced the germination rate,germination index and seedling length significantly.Exogenous NO could relieve the salt stress in some extent and the treatment of 0.5% mmol/L was the best.Under the treatment of0.5% mmol/L NO+150mmol/L NaCl,the germination percentage and seedling length did not show significant difference from the treatment of 0mmol/L NaCl(P0.05),and germination index was significantly higher than control(P0.05)