| 增强紫外线B辐射对小麦叶绿体膜组分和膜流动性的影响 |
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| 引用本文： | 杨景宏,陈拓,王勋陵.增强紫外线B辐射对小麦叶绿体膜组分和膜流动性的影响[J].植物生态学报,2000,24(1):102-105. |
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| 作者姓名： | 杨景宏 陈拓 王勋陵 |
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| 作者单位： | [1]兰州大学生物系,兰州 [2]中国科学院兰州冰川冻土研究所冰芯与寒区环境开放实验,兰州 |
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| 基金项目： | 国家自然科学基金!(编号 :3 9670 13 2和 3 9970 12 6)，博士点基金 |
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| 摘 要： | 研究了温室种植的小麦在0kJ·m-2(对照)、8.82kJ·m-2(处理1)和12.6kJ·m-2(处理2)3种剂量的紫外线B辐射下叶绿体膜组分和膜流动性的变化。紫外线B辐射导致了光合色素(包括叶绿素和类胡萝卜素)的降解、Hill反应的抑制、膜脂肪酸组分配比的改变和不饱和度指数(IUFA)的下降、膜流动性的降低以及丙二醛(MDA)含量的升高。分析表明，紫外线B辐射诱导的膜脂过氧化是叶绿体膜系统受破坏的主要原因。
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| 关 键 词： | 小麦 紫外线B辐射 叶绿体膜系统 膜脂过 |
| 修稿时间： | 1997-12-15 |
THE INFLUENCE OF ENHANCED ULTRAVIOLET-B RADIATION ON CHLOROPLAST MEMBRANE COMPOSITION AND MEMBRANE FLUIDITY IN WHEAT LEAVES |
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| YANG Jing-Hong and WANG Xun-Ling,CHEN Tuo.THE INFLUENCE OF ENHANCED ULTRAVIOLET-B RADIATION ON CHLOROPLAST MEMBRANE COMPOSITION AND MEMBRANE FLUIDITY IN WHEAT LEAVES[J].Acta Phytoecologica Sinica,2000,24(1):102-105. |
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| Authors: | YANG Jing-Hong and WANG Xun-Ling CHEN Tuo |
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| Affiliation: | YANG Jing-Hong and WANG Xun-Ling
(Department of Biology,Lanzhou University,Lanzhou,730000)
CHEN Tuo
(The Laboratory of Ice Core and Cold Regions Environment,LIGG,CAS,Lanzhou,730000) |
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| Abstract: | Changes in chloroplast membrane composition and membrane fluidity in wheat leaves exposed to 0kJ·m-2 (CK), 8.82kJ·m-2 (T1) and 12.6kJ· m-2 (T2) were studied. Ultraviolet-B radiation induced the degradation of photosynthetic pigments (including chlorophyll and carotenoids),an increase in MDA content and change in the fatty acid composition of chloroplast membrane and a decrease in IUFA. Compared with a control treatment ,both the activity of the Hill reaction and the fluidity of chloroplast membranes were reduced by ultraviolet-B exposure. The analysis indicated that membrane peroxidation might be one of the causes of chloroplast membrane damage induced by ultraviolet-B radiation. |
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| Keywords: | Wheat(Triticum aestivum L ) Ultraviolet radiation B Chloroplast membrane system Membrane peroxidation |
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