高CO_2浓度对石莼光合作用及营养盐吸收的影响  

Effects of Elevated CO_2 Concentration on Photosynthesis and Nutrients Uptake of Ulva lactuca

作　　者：邹定辉[1] 高坤山[1] 阮祚禧[2] 

机构地区：[1]汕头大学科技中心海洋生物研究所,汕头515063 [2]中国科学院水生生物研究所,武汉430072

出　　处：《青岛海洋大学学报（自然科学版）》2001年第6期877-882,共6页Journal of Ocean University of Qingdao

基　　金：国家自然科学基金项目 ( 39830 0 6 0;396 2 5 0 0 2 )资助

摘　　要：在室外自然条件下用高 CO2 浓度的空气 (5 0 0 0μL CO2 · L-1)通气培养石莼 (Ulvalactuca) 9～ 10 d,以探讨高 CO2 浓度对石莼生理特性的影响。结果表明 ,在高 CO2 浓度条件下 ,石莼的生长速率没有明显改变。而石莼的光合能力下降 ,光合参数如光合效率、羧化效率及光饱和点也都下降 ;但在高 CO2 浓度条件下 ,石莼培养液中营养盐浓度的下降速度增加 ,且 NO-3 浓度下降速度的相对促进量比 PO3 -4The marine green macroalgae Ulva lactuca was cultured outdoor with elevated CO 2 concentration (5000μL CO 2·L -1 ) for 9～10 days during May, 2000 to investigate the physiological effects of elevated CO 2 on Ulva lactuca . The results showed that the elevated CO 2 had insignificant effect on relative growth rates of this alga. However, it remarkably reduced the photosynthetic capacity and efficiency, light saturation point and carboxylating efficiency. The CO 2 enrichment enhanced the rate of nutrients by Ulva lactuca , and the enhancement for NO - 3 was greater than for PO 3- 4.

关 键 词：石莼 光合作用 营养盐吸收 海藻 二氧化碳浓度 绿藻 羧化效率 

分 类 号：Q949.211[生物学—植物学]