低温胁迫对紫苜蓿‘WL525’生理特性的影响  

Effect of low temperature stress on physiological characteristics of Medicago sativa Linn. ‘WL525'

作　　者：陈梓健 刘凤民[2] 张伟丽[1] 

机构地区：[1]仲恺农业工程学院生命科学学院,广东广州510225 [2]仲恺农业工程学院教学科研基地,广东广州510225

出　　处：《仲恺农业工程学院学报》2015年第3期9-11,30,共4页Journal of Zhongkai University of Agriculture and Engineering

基　　金：广东省研究生创新计划(2014JGXM-MS31)资助项目

摘　　要：以紫苜蓿(Medicago sativa Linn.)‘WL525’为试验材料,通过低温处理4 d,就低温胁迫对紫苜蓿中丙二醛(Malondialdehyde,MDA)浓度、相对电导率、过氧化物酶(Peroxidase,POD)活性和可溶性糖质量浓度变化的影响进行了研究.结果表明:随着低温胁迫时间的延长,紫苜蓿‘WL525’叶片细胞中的MDA浓度总体呈现升高的趋势,POD酶活性呈现出先增加后降低的趋势,可溶性糖质量浓度和相对电导率均呈现出升高的趋势.4个生理指标均与紫苜蓿‘WL525’的抗寒性有密切联系,紫苜蓿‘WL525’通过增加POD酶活性和可溶性糖的质量浓度来调节低温对其造成的伤害.Medicago sativa Linn. WL525 was treated by low temperature stress for 4 d and the content of MDA and soluble sugar, POD activity, and relative conductivity were measured. The results showed that under low temperature stress, the MDA content in leaves cells of Medicago sativa Linn. WL525 showed increasing trend; POD activity increased first and then decreased; the soluble sugar content and the relative conductivity showed increasing trend. These four kind of physiological indexes related closely to the cold hardiness of Medicago sativa Linn. WL525. The increased content of soluble sugar and POD activity adjust the WL525 plant to the damage caused by temperature stress.

关 键 词：紫苜蓿(Medicago SATIVA Linn.) 低温胁迫 抗寒性 生理特性 

分 类 号：S541[农业科学—作物学]