王军,肖慧,冯蕾,蔡恒江,唐学玺

• 1:中国海洋大学海洋生态实验室
• 2:中国海洋大学海洋生态实验室
• 3:中国海洋大学海洋生态实验室
• 4:中国海洋大学海洋生态实验室

摘要(Abstract)：

研究海洋生态系统在调节全球变化中的作用,采用生态毒理学的方法研究了UV-B辐射增强对2种海洋微藻膜的损伤及其差异性。结果表明,随着UV-B辐射剂量的增加,叉鞭金藻(Dicrateriasp.)和三角褐指藻(Phaeodactylum tricornu-tum)的光合速率降低。同时,膜相对透性增大,细胞内H2O2含量上升,微粒体膜中磷脂减少,游离脂肪酸增加。表明UV-B辐射增强使2种微藻的膜受到了严重伤害,而且膜伤害的加剧与活性氧的积累和由此引发的膜脂脱酯化有关。2种微藻细胞匀浆中丙二醛(MDA)含量无显著变化,而微粒体膜的MDA含量随着UV-B辐射剂量的加大显著提高。这表明UV-B辐射增强对2种海洋微藻膜的损伤可能是由膜脂过氧化和脱酯化作用共同引起的。

关键词(KeyWords)： UV-B辐射增强;膜脂过氧化;脱酯化;海洋微藻

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(30270258);; 新世纪优秀人才支持计划奖励基金项目(NCET-05-0597)资助

作者(Author): 王军,肖慧,冯蕾,蔡恒江,唐学玺

DOI: 10.16441/j.cnki.hdxb.2006.05.017

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