人工海水胁迫下小麦芽期和苗期的耐盐性鉴定方法  

Identif ication Methods of Salt-Tolerance at Germination and Seedling Stage of Wheat under Artif icial Sea Water Stress

作　　者：刘妍妍[1] 吴纪中[2] 许璋阳 沈振国[1] 夏妍[1] 王桂萍[1] 陈亚华[1] 

机构地区：[1]南京农业大学生命科学学院,南京210095 [2]江苏省农业科学院粮食作物研究所,南京210014

出　　处：《植物生理学报》2014年第2期214-222,共9页Plant Physiology Journal

基　　金：江苏省农业科技自主创新资金项目[CX(12)2024];科技基础性工作专项(2007FY110500-06);国家科技计划(2013BAD01B02-12)

摘　　要：本文采用不同浓度人工海水分别在小麦芽期和苗期进行胁迫处理,筛选不同时期、不同耐盐指标的适合处理浓度,并利用模糊数学隶属函数法计算各指标的隶属值,通过比较芽期、苗期各指标隶属值总平均值的大小来确定小麦品种耐盐性的强弱。建立了65%人工海水相对发芽率与40%人工海水相对芽长两指标相结合的小麦芽期耐盐性鉴定方法;以及在40%人工海水处理下综合株高增长量、根长增长量、地上部干重与地下部干重4个指标相对值的小麦苗期耐盐性鉴定方法。运用这两个鉴定方法可以有效地区分16个小麦品种在人工海水胁迫下的耐盐性差异。To select the salinity concentration suitable for identifying the salt tolerance of wheat at the germination and seedling stage,different concentrations of artificial sea water and salt-tolerant indexes were applied in this study.The results showed that two methods were available to evaluate wheat salt tolerance by comparing the mean value of specific evaluation indexes calculated by using the method of fuzzy membership function.One was used for measuring wheat salt-tolerance at the germination stage by calculating the mean value of the relative germination percentage under 65% sea water stress and the relative shoot length undre 40% sea water stress.And the other was suitable for identifying wheat salt-tolerance at the seedling stage by using the joint mean value of the relative value of shoot growth,root growth,dry weight of overground part and dry weight of underground part under the 40% sea water stress.The salt-tolerance of 16 varieties were identified effectively at the germination and seedling stages by the two methods.

关 键 词：小麦 人工海水 耐盐性 鉴定指标 

分 类 号：S512.1[农业科学—作物学]