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作 者 ：邱宗波;孙立;李金亭;魏改改;岳明

期 刊 ：植物研究 2010年 30卷 (3)期 页码：294-298

关键词：过氧化氢；小麦；水分胁迫；脂质过氧化；

Keywords:H2O2, wheat, water stress, lipid peroxidation,

摘 要 ：采用营养液水培的方法，研究外源过氧化氢（H₂O₂）对10% PEG6000（聚乙二醇）水分胁迫引起小麦幼苗脂质过氧化伤害的防护作用。结果表明，0.05 μmol·L^-1 H₂O₂能够缓解水分胁迫对小麦幼苗生长的抑制效应，使幼苗株高、根长和单株干重显著增加，并提高受旱小麦叶片超氧化物歧化酶（SOD）、过氧化物酶（POD）和过氧化氢酶（CAT）的活性及谷胱甘肽和抗坏血酸的含量，降低丙二醛（MDA）含量和超氧自由基（O₂^－·）产生速率。说明外源H₂O₂可抑制水分胁迫引起小麦幼苗脂质过氧化作用，增强小麦的抗旱性。

Abstract:The study was conducted in nutrient solution to investigate the protecting effects of exogenous hydrogen peroxide (H₂O₂) on the wheat seedlings damage by water stress. The results showed that exogenous 0.05 μmol·L^-1 H₂O₂ significantly alleviated the injury to seedlings and markedly increased the seedlings plant height, root length, dry weight, the contents of GSH, AsA and the activities of SOD, POD and CAT. However, exogenous 0.05 μmol·L^-1 H₂O₂ markedly decreased the MDA concentration and the production rate of O₂^-· in wheat seedling leaves under water stress. The results suggest that the treatment of H₂O₂ could restrain wheat seedlings lipid peroxidation by water stress and enhance anti-drought property of wheat seedlings.

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