Effects of NaCl Stress on Seed Germination of Radish

The salt resistance of radish seed was studied by treating with different concentration NaCl at the germination stage.Results showed that low concentration of NaCl stress treatment(≤20 mmoloL-1) significantly promoted seed germination rate,germination potential,germination index and vigor index.The concentration of NaCl which significantly inhibited the seed germination was 100 mmol·L-1,while that significantly inhibited the radicle growth was 80 mmoloL-1,which significantly inhibited the germ growth was 100 mmol·L-1.The salt concentration,semi-lethal concentration and salt tolerance limit of radish seed germination were 155.02,250.02 and 402.02 mmol·L-1.