外源多胺对铜胁迫下荇菜叶片生物膜的保护作用  

Protective Effect of Exogenous Polyamines on Biomembranes of Nymphoides peltatum (Gmel) O.Kuntze Leaves under Cu Stress

作　　者：王学[1] 徐恒戬[1] 

机构地区：[1]山东理工大学生命科学学院,山东淄博255049

出　　处：《植物生理学通讯》2008年第3期449-453,共5页Plant Physiology Communications

基　　金：国家自然科学基金(30670121);山东理工大学博士科研启动经费(4041-406027)。

摘　　要：研究外源亚精胺和精胺对铜胁迫下荇菜叶片细胞膜透性、膜脂脂肪酸组成、光合、呼吸、铜积累影响的结果表明,50μmol·L^(-1)CuSO_4处理导致膜脂脂肪酸组分中饱和脂肪酸组分增加,不饱和脂肪酸组分及不饱和指数(IUFA)下降,细胞膜透性加大,光合速率下降,呼吸速率迅速上升,铜在叶细胞中大量积累。外施0.1 mmol·L^(-1)亚精胺和精胺可以稳定生物膜的结构和功能,降低铜在细胞中的累积。The effects of exogenous sperrnidine （Spd） and sperrnine （Spm） on the membrane permeability, fatty acid composition, photosynthesis, respiration and copper accumulation in the leaves of Nymphoides peltatum under Cu stress were studied. Results showed that 50 μmol·L^-1 copper treatment increased the levels of saturated fatty acids, lowered the levels of unsaturated fatty acids and the index of unsaturated fatty acid （IUFA）, enhanced membrane permeability, decreased photosynthesis rate, increased respiratory rate, and accelerated Cu accumulation in the leaves of N. peltatum. 0.1 mmol·L^-1 exogenous Spd or Spm stabilized the structure and function of biomembranes, and reduced Cu accumulation.

关 键 词：多胺 铜 荇莱 生物膜 

分 类 号：Q945.7[生物学—植物学]