不同甘蓝种质材料在萌发期的耐盐性差异及评价

Differences and Evaluation of Salt Tolerance of Different Cabbage Materials during Germination

用0、60、120、180和240 mmol/L的NaCl溶液对55份甘蓝种质材料的种子进行胁迫处理,研究了其在盐胁迫下的萌发能力,并根据耐盐性指标(相对发芽势、相对发芽率、相对发芽指数和相对盐害率)的测试数据,采用模糊数学隶属函数法对供试甘蓝材料的耐盐性进行了综合评价。结果表明:随着盐溶液浓度的升高,供试甘蓝材料的种子萌发能力逐渐减弱,其相对发芽势、相对发芽率和相对发芽指数逐渐降低,而相对盐害率逐渐升高;不同甘蓝材料在萌发期的耐盐性存在显著的差异;4个耐盐性指标间存在显著的相关关系;筛选出7份耐盐性较强的材料,其中25号材料的耐盐性最强,52号材料的耐盐性最弱。

The seeds of 55 cabbage germplasms were treated with 0,60,120,180 and 240 mmol/L NaCl solution to study their germination ability under salt stress.Based on the test data of relative germination potential,relative germination rate,relative germination index,and relative salt damage rate of cabbage seeds during germination,the membership function method was used to evaluate and analyze seed salt tolerance.The results showed that with the increase of salt solution concentration,the seed germination ability of tested cabbage was gradually decreased.The relative germination potential,relative germination rate and relative germination index were gradually decreased,and the relative salt damage rate was gradually increased.There were significant differences in salt tolerance among different cabbage materials during germination.There were significant correlations among the four indexes of salt tolerance.Seven materials with strong salt tolerance were selected,among which No.25 cabbage material had the strongest salt tolerance,while No.52 cabbage material had the weakest salt tolerance.