The Correlation Analysis between the Morphological Indices and Salt Tolerance in Different Rice Germplasm under the Salt Stress

The germination and seedling stages experiments were done with 16 rice accessions which belong to Indica, Japonica and Javanica type, possess different salt tolerance and came from China, Korea and International Rice Research Institute, respectively. The germination postponed and lengthened, and germination rate decreased with NaCl concentration increasing. The salt tolerance can be indicated efficiently by the germination rate in the germination stage. Many morphological indices were affected remarkably with NaCl concentrations, and the leaf index of salinity injure could reflect the salt tolerance capacity in seedling stage. The higher is the correlation coefficient between NaCl concentration and leaf index of salinity injure, the longer is NaCl treatment. The salt tolerance in the germination and seedling stages was different and the correlation coefficient was low on the same rice varieties.