| 低温胁迫下精胺对黄瓜幼苗抗氧化酶系统及膜脂过氧化的影响 |
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| 引用本文： | 王学.低温胁迫下精胺对黄瓜幼苗抗氧化酶系统及膜脂过氧化的影响[J].种子,2008,27(11). |
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| 作者姓名： | 王学 |
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| 作者单位： | 山东理工大学生命科学学院,山东,淄博,255049 |
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| 基金项目： | 山东理工大学博士科研启动经费 |
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| 摘 要： | 研究了低温(5℃)胁迫下精胺对黄瓜幼苗叶片抗氧化酶系统和膜脂过氧化的影响。结果表明,外施精胺显著降低了低温胁迫下黄瓜幼苗叶片的丙二醛含量和电解质渗漏率、增强了超氧化物歧化酶、过氧化氢酶、过氧化物酶和抗坏血酸过氧化物酶活性,提高了抗坏血酸和脯氨酸含量,从而增强了植株抗氧化能力,减轻了细胞膜伤害,提高了黄瓜的抗寒力。
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| 关 键 词： | 精胺 黄瓜 抗氧化酶 膜脂过氧化 |
Effects of Spermine on Antioxidant Enzyme Systems and Membrane LipidPeroxidation in Cucumber Seedling under Low Temperature Stress |
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| WANG Xue.Effects of Spermine on Antioxidant Enzyme Systems and Membrane LipidPeroxidation in Cucumber Seedling under Low Temperature Stress[J].Seed,2008,27(11). |
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| Authors: | WANG Xue |
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| Abstract: | Effects of spermine (Spm) on antioxidant enzyme systems and membrane lipid peroxidation in the leaves of cucumber seeding were investigated under low temperature stress.Results of experiments indicated that Spin application in cucumber seeding induced a significant decrease in malondialdehyde content and elec- trolyte leakage under low temperature stress.The activities of superoxide dismutase (SOD),catalase (CAT), peroxidase (POD) and ascorbic peroxidase (APX) were increased by Spm application.Spin application also caused a distinct increase in the ascorbic acid and proline contents.It could be speculated that exogenous Spm enhanced cold resistance by increasing antioxidant capacity and alleviating membrane damage in cucumber un- der low temperature stress. |
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| Keywords: | spermine cucumber antioxidative enzymes membrane lipid peroxidation |
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