盐胁迫下CO_2加倍对春小麦一些光合功能的影响  

EFFECTS OF CO_2 DOUBLING ON SOME PHOTOSYNTHETIC FUNCTIONS OF SPRING WHEAT UNDER SALT STRESS

作　　者：张其德[1] 温晓刚[1] 卢从明[1] 冯丽洁[1] 匡廷云[1] 张建华[2] 

机构地区：[1]中国科学院植物研究所,北京100093 [2]香港浸会大学生物系

出　　处：《植物生态学报》2000年第3期308-311,共4页Chinese Journal of Plant Ecology

基　　金：中国科学院"九.五"特别支持项目;国家重点基础研究发展规划项目!( G19980 10 10 0 )资助

摘　　要：研究了在盐胁迫下 CO2 浓度加倍对春小麦 (Triticum aestivum)青 32 3光合色素含量和一些光合功能的影响。结果表明 ,盐胁迫降低春小麦叶片单位鲜重叶绿素 (Chl)和类胡萝卜素 (Car)的含量、叶绿体对光能的吸收能力、Mg2 + 对两个光系统 (PSII和 PSI)之间激发能分配的调节能力 ,以及荧光猝灭速率 (Δ Fv/ T)。然而 ,CO2 加倍有提高上述各参数的作用 ,表明高 CO2 浓度能减轻盐胁迫对光合功能的不利效应。Effects of doubled CO 2 on the content of photosynthetic pigments and some photosynthetic functions of spring wheat under salt stress were studied. Chlorophyll and carotenoid content per unit fresh weight of leaves and the capacity of light energy absorption of chloroplasts containing equal chlorophyll were reduced by salt stress, as were the fluorescence quenching rate (ΔFv/T) and the capacity of excitation energy distribution between PS Ⅱ and PS Ⅰ regulated Mg 2+ . However, these parameters all increased in the presence of doubled CO 2. The results indicated that the unfavourable effects of salt stress on photosynthetic functions could be alleviated by high CO 2 concentration.

关 键 词：春小麦 CO2浓度 盐胁迫 光合色素 光能吸收 

分 类 号：Q945[生物学—植物学]