| 增强UV-B辐射对小麦叶中CAT、POX和SOD活性的影响 |
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| 引用本文： | 陈拓,王勋陵.增强UV-B辐射对小麦叶中CAT、POX和SOD活性的影响[J].武汉植物学研究,1999,17(2):101-104. |
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| 作者姓名： | 陈拓 王勋陵 |
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| 作者单位： | 1. 中国科学院兰州冰川冻土研究所,兰州, 730000
2. 兰州大学生物系,兰州,730000 |
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| 基金项目： | 国家自然基金，博士点基金 |
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| 摘 要： | 研究了０（ＣＫ），８．８２ｋＪ／ｍ＾２（Ｔ１）及１２．６ｋＪ／ｍ＾２（Ｔ２）三种剂量的紫外线Ｂ（ＵＶ－Ｂ，２８０～３２０ｎｍ）辐射对温室种植的小麦膜伤害的机理，试验结果表明，在增强ＵＶ－Ｂ辐射下，与对照相比，膜脂过氧化物产－丙二醛（ＭＤＡ）含量明显升高，同时膜脂脂肪酸组成配比改变，不饱和度指数（ＩＵＦＡ）有所下降，并具剂量效应，过氧化氢酶（ＣＡＴ），过氧化物酶（ＰＯＸ）活性显著升高，而超氧歧化酶（
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| 关 键 词： | 小麦(TriticumaestivumL.) UV-B辐射 膜伤害 膜脂过氧化 抗性机制 |
| 收稿时间： | 1998-3-8 |
| 修稿时间： | 1998-7-9 |
THE EFFECT OF ENHANCED UV B RADIATION ON THE ACTIVITIES OF SOD,CAT AND POX IN WHEAT LEAVES |
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| Chen Tuo,Wang Xunling.THE EFFECT OF ENHANCED UV B RADIATION ON THE ACTIVITIES OF SOD,CAT AND POX IN WHEAT LEAVES[J].Journal of Wuhan Botanical Research,1999,17(2):101-104. |
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| Authors: | Chen Tuo Wang Xunling |
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| Institution: | 1. Lanzhou Institute of Glaciology and Geocryology, The Chinese Academy of Sciences Lanzhou 730000;2. Department of Biology, Lanzhou University Lanzhou 730000 |
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| Abstract: | The damage mechanisms of UV B radiation with the different dose of 0 (CK),8 82 kJ/m 2 (T 1) and 12.6 kJ/m 2 (T 2) in wheat leaves were studied under greenhouse conditions.The MDA content was increased,while IUFA decreased comparing with cotrol.CAT and POX activities were significantly enhanced during exposure to UV B radiation.SOD activity,however,was almost unchanged.The results suggest that lipid peroxidation is one of the causes of membrane damage, where activated oxygen was probably involved in this process,but plants have some intern resistant mechanisms to protect from UV B induced damage. |
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| Keywords: | UV B radiation Triticum aestivum L Membrane damage Resistant mechanism Lipid peroxidation |
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