盐胁迫下不同水稻种质形态指标与耐盐性的相关分析

选用中国、韩国和国际水稻研究所(IRRI)不同耐盐能力的籼、粳、爪哇稻16份为材料进行芽期和苗期试验。随着NaCl浓度增加，种子开始发芽的时间推迟、发芽过程延长、发芽率降低；品种的发芽率能有效地指示其芽期耐盐能力。NaCl浓度对许多苗期形态指标有显影响，其中叶片盐害指数能反映品种的苗期耐盐能力；随着NaCl处理时间的增长，叶片盐害指数与NaCl浓度间的相关性越来越大。同一品种在芽期的耐盐能力和苗期表现不一致，两的相关系数很低。

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.