芽期NaCl胁迫下不同基因型芝麻的反应差异研究  

Genotypic variation in sesame salt tolerance during germination under NaCl stress

作　　者：孙建[1] 乐美旺[1] 饶月亮[1] 颜廷献[1] 颜小文[1] 周红英[1] 

机构地区：[1]江西省农业科学院作物研究所,江西南昌330200

出　　处：《干旱地区农业研究》2014年第6期75-81,133,共8页Agricultural Research in the Arid Areas

基　　金：国家芝麻产业技术体系建设项目(CARS-15-1-04);江西省农业科学院科技创新团队建设基金

摘　　要：通过芽期NaCl胁迫研究了不同浓度NaCl对芝麻种子成苗及幼苗生长的影响，分析了0．4％ NaCl胁迫下不同基因型芝麻的反应差异。结果表明：（1）0～0．4％的NaCl浓度对芝麻种子成苗率影响较小，在NaCl浓度为0．6％～0．8％时表现为成苗率下降；芽长和简易活力指数均随NaCl浓度的增加而不断下降；根长和苗鲜重则因品种不同表现有异，部分品种随NaCl浓度增加呈先升后降趋势，部分品种则表现为不断下降趋势，不同芝麻品种表现差异较大。（2）所有参试品种在0．4％的NaCl浓度胁迫下在根长、芽长、苗鲜重、简易活力指数等测定指标上均表现出下降较为明显，认为0．4％的NaCl浓度胁迫可以作为芝麻种质资源耐盐性筛选鉴定的参考浓度。（3）聚类分析结果将39份种质资源明显聚为两类，即包含12份种质的耐盐类和包含27份种质的不耐盐类。（4）参试的改良品种（系）与地方种质耐盐性差异不大，地方种质的耐盐性指标的多样性指数要大于改良品种（系），即在NaCl胁迫下地方种质所表现的基因型差异要大于改良品种（系）。Effect of NaCl on seeding emergence and growth of sesame during germination was analyzed .The results indicated a modest effect on seeding emergence of NaCl treatment with the range of 0% ~0 .4% .Length of bud and sim-ple vigor index decreased continuously with increasing of concentration of NaCl .The root length and seeding fresh weight varied with sesame cultivars .Some increased first but decreased later with increasing concentration of NaCl ,while others decreased continuously .The 0 .4% NaCl treatment led to a significant decrease in root length ,length of bud ,seeding fresh weight and simple vigor index ,indicating that this could be used as reference concentration for screening and identi-fication of salt tolerance in sesame germplasm . The cluster analysis divided the 39 germplasm into two groups , 12 germplasm with salt tolerance and the others being salt sensitive .In addition ,there was minimal difference in salt toler-ance between newly released cultivars and local salt tolerance cultivar .

关 键 词：芝麻 NACL胁迫 基因型 耐盐性 反应差异 种质资源 

分 类 号：S565.303[农业科学—作物学]