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干旱胁迫对委陵菜膜脂过氧化作用及保护酶活性的影响 预览 被引量:14

Effect of Drought on Membrane Lipid Peroxidation and Protective Enzyme Activities of Potentilla
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摘要 用聚乙二醇模拟干旱胁迫,研究了干旱胁迫对5种委陵菜属植物膜脂过氧化作用及保护酶活性的影响。结果表明:随着干旱胁迫程度的加重5种委陵菜的MDA含量呈递增趋势,其中伏委陵菜与三叶委陵菜的增幅较大,表明其膜脂抗过氧化能力最弱,细胞被破坏的程度最大,抗旱能力最弱。SOD、POD、CAT活性随着干旱胁迫程度的增加呈现先上升后下降的变化趋势,表明在轻度干旱胁迫下5种委陵菜均能启动保护酶系统提高抗性,但随着胁迫程度增加,其保护酶系统平衡遭到破坏,加剧膜脂过氧化而造成膜损伤。 Effects of drought on membrane lipid peroxidation and protective enzyme activities of five Potentilla species under drought stress of PEG were studied.The results showed that as the severity increase of drought stress,MDA content of five Potentilla species showed an increasing trend,MDA content in Potentilla paradoxa and Potentilla freyniana increased the most,indicating that lipid peroxide ability was the weakest,cells were damaged the greatly,drought resistance was the weakest.SOD,POD,CAT activity increased first with the degree of drought stress increased and then decreased,indicating that under light drought stress five Potentilla species can start the protective enzyme system to enhance the resistance,but with the stress level increased,the balance of protective enzymes was destroyed,which aggravated lipid peroxidation resulting in membrane damage.
作者 李楠 黄佳丽 曲波 崔娜 刘艳 孙航 LI Nan,HUANG Jia-li,QU Bo,CUI Na,LIU Yan,SUN Hang(1.College of Biological Technology,Shenyang Agricultural University,Shenyang 110886,China;2.Shenyang Kangping County Environmental Protection Bureau,Shenyang 110500,China)
出处 《中国草地学报》 CSCD 北大核心 2011年第4期 73-77,共5页 Chinese Journal of Grassland
基金 国家水体污染控制与治理科技重大专项(2012ZX07208-006)资助
关键词 委陵菜 干旱胁迫 膜脂过氧化 保护酶系统 Potentilla Drought stress Membrane lipid peroxidation Protective enzyme system
作者简介 李楠(1978-),女,黑龙江省哈尔滨人,学士,讲师,1999年毕业于辽宁师范大学生物学专业,主要从事植物资源保护与利用研究,发表论文5篇. 通讯作者
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