Abstract:
【Objective】 To screen the salt tolerant varieties suitable for the salinized rice area in Xinjiang by exploring the salt tolerance of different fragrant rice cultivars.
【Method】 The effects of different NaCl concentrations (0, 3, 6, 9 and 12 g/L) on seed germination and seedling growth of 20 aromatic rice varieties were studied.
【Result】 The results showed that the germination potential, germination rate, shoot length, root length, root number, survival rate and leaf survival rate of different aroma rice varieties all decreased with the increase of NaCl concentrations. Medium salt concentration and high salt concentration (9 g/L, 12 g/L) significantly inhibited the seed germination, reduced the seed germination potential and its germination rate, shortened the length of shoots and roots, and decreased the root number, resulting in an increase in the salt damage index; The salt tolerance performance of different rice materials was different under the same salt concentration treatment.
【Conclusion】 Through comprehensive analysis, it was concluded that the suitable NaCl salt concentration for screening at the bud stage and seedling stage of aroma-type rice varieties could be 6 g/L, exceeding the concentration would be detrimental to the germination and seedling growth of rice; The Liangxiang 6-4 fragrance variety has good comprehensive salt tolerance at the bud stage and seedling stage, 97-4-3, Liangxiang 2-1, Xincejing 1, Xinjingxiang 1, Xinjiangxiang 83 and Xinjiangxiang 8 have strong salt tolerance at the bud stage, and the above fragrant rice varieties can be used as salt-tolerant fragrant rice varieties or resources.