植物生态学报 ›› 2000, Vol. 24 ›› Issue (1): 102-105.

• 论文 • 上一篇    下一篇

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

杨景宏,陈拓,王勋陵   

  • 发布日期:2000-01-10
  • 通讯作者: 杨景宏

The Influence of Enhanced Ultraviolet-B Radiation on Chloroplast Membrane Composition and Membrane Fluidity in Wheat Leaves

YANG Jing-Hong, CHEN Tuo and WANG Xun-Ling   

  • Published:2000-01-10
  • Contact: YANG Jing-Hong

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。

关键词: 小麦, 紫外线B辐射, 叶绿体膜系统, 膜脂过

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.

Key words: Wheat (Triticum aestivum L. ), Ultraviolet radiation-B, Chloroplast membrane system, Membrane peroxid