氯化钠胁迫下3种披碱草属牧草生理特性的研究  

Physiological Characteristics of Three Elymus Grass under NaCl Stress

作　　者：刘锦川[1] 云锦凤[1] 张磊[1] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古自治区呼和浩特010019

出　　处：《草地学报》2010年第5期694-697,共4页Acta Agrestia Sinica

基　　金：内蒙古自治区重大科技项目(20071923);国家自然科学基金项目(30760159)资助

摘　　要：为研究披碱草属(Elymus Linn.)3种优良牧草在盐胁迫下生理指标的变化,用浓度为0%,0.5%,1.0%,1.5%,2.0%的氯化钠溶液分别处理老芒麦(Elymus sibiricus L.)、披碱草(Elymus dahuricus Turcz.)和加拿大披碱草(Elymus canadensis L.)的幼苗,处理7 d后测定叶片组织相对含水量(RWC)、细胞膜透性、超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量及游离脯氨酸(Pro)含量等抗性指标。结果表明:在盐胁迫下,随着盐浓度的增加,各材料的RWC,SOD活性呈下降趋势;电导率,MDA含量随盐浓度增加呈上升趋势;Pro含量为先上升后下降的单峰曲线。The salt tolerance of the Elymus dahuricus Turcz.and Elymus sibiricus L.,especially the Elymus canadensis L.,are not well reported.The current study reports physiology indexes of three forages under salt stress.All seedlings were treated with different viscosities of the NaCl solution.The relative water contents（RWC）,electrical conductivity,the activity of superoxide dismutase（SOD）,the content of malondialdehyde（MDA） and free proline were tested after 7 days of treatment.Results show both RWC and the activity of SOD were decreased while electrical conductivity and the content of MDA were increased.Free praline values were initially increased then decreased over the duration.

关 键 词：披碱草属 盐胁迫 生理指标 

分 类 号：S543.9[农业科学—作物学]