Study on Salt Tolerance and Changes of Some Photosynthetic Parameters in Leaves of Jinyuan 89 Rice under Salt Stress
The response to salt stress during seed germination and seedling growth was compared among the new rice variety Jinyuan 89,its parent Jinyuan E28 and Jinyuan 45,the parent of E28.The results showed that under the treatment with a salt concentration of less than 0.9％NaCl,there was no significant difference in germination rate and germination potential of the three varieties,showing that they all possess good salt toleranc.One-week-old seedlings were irrigated with 0.6％NaCl aqueous solution for 2 weeks,by which the least impact on the plant height and fresh weight of Jinyuan E28 seedlings(about 10％and 30％less than the control),and the least impact on dry weight of Jinyuan 89 seedlings(about 10％less than the control)were found.The changes of some photosynthetic parameters under salt stress were investigated by using chlorophyll fluorescence meter.The results showed that the salt tolerance of Jinyuan 89 seedlings was better than that of the other two varieties,which was mainly demonstrated by less damage of thylakoid membrane and later initiation of the self-defense mechanism that consumes light energy and protects photosynthetic machinary.
万方数据
维普
