盐胁迫对多叶型苜蓿种子萌发的影响  

Effects of Salt Stress on the Multifoliolate Alfalfa Seed Germination.

作　　者：李潮流[1] 周湖平[2] 张国芳[3] 张英俊[2] 孟林[3] 

机构地区：[1]甘肃农业大学草业学院,甘肃兰州730070 [2]中国农业大学草地所,北京100094 [3]北京市农林科学院草业与环境研究发展中心,北京100089

出　　处：《中国草地》2004年第2期21-25,共5页Grassland of China

基　　金：北京市优秀人才专项经费资助项目"高蛋白多叶型苜蓿品种引选及其开发关键技术研究";北京市重大科技合同项目"华北农作物核心物质资源创新研究"(9554203600)部分研究内容

摘　　要：对收集到的6种多叶型苜蓿品种(WL323MF、8925、Phabulous、Forerunner、Grandeur、8920MF)种子进行了NaCl和Na2SO4溶液胁迫下的萌发特性研究。在两种盐的6个不同浓度梯度下对6种多叶型苜蓿种子的发芽势、发芽率、胚芽长、胚根长、根芽比及全株重等指标的测定结果表明,NaCl溶液胁迫多叶型苜蓿种子萌发的耐受临界水平为51～86mmol/L;Na2SO4溶液胁迫多叶型苜蓿种子萌发的耐受临界水平为70～113mmol/L,超过上述浓度水平对种子萌发存在显著的抑制作用。The effect of NaCl & Na_2SO_4 on the seed germination characteristics of six multifoliolate alfalfa (WL323MF,8925,Grandeur,Forerunner,Phabulous,8920MF) was studied, and the seed germination rate,germination potential,embryo length,radicle length,root/shoot and the whole plant weight with six designed concentration grades of the two salts were measured respectively.The results showed that the critical level of NaCl & Na_2SO_4 for seed germination was 51～86mmol/L and 70～113mmol/L,for seed germination would be restrained remarkably if exceed the levels.

关 键 词：盐胁迫 多叶型苜蓿 种子 萌发 品种 浓度 

分 类 号：S541.903.7[农业科学—作物学]