植物光合作用对CO_2浓度增高的适应机制  

The Mechanisms of Plant Photosynthetic Acclimation to Elevated CO_2 Concentration

作　　者：张道允[1] 许大全[1] 

机构地区：[1]中国科学院上海生命科学研究院植物生理生态研究所,上海200032

出　　处：《植物生理与分子生物学学报》2007年第6期463-470,共8页Journal Of Plant Physiology and Molecular Biology

基　　金：中国科学院创新方向性项目(Nos.KZCX2-408;KSCX-SW-133);国家自然科学基金项目(Nos.40231003;40120140817);国家重点基础研究发展规划(九七三)项目(No.2005CB121106)资助。

摘　　要：长期在高浓度CO_2环境下生长的植物往往会发生光合适应或下调,即在相同CO_2浓度下的光合速率明显低于普通空气中生长的对照。虽然关于这种现象已经有许多研究报告和综述文章,但是它的机理还不很清楚。本文结合作者所在研究组的工作,概述了关于植物光合适应机理研究的新进展,提出除了呼吸作用增强和光合产物超常积累的可能作用以外,二磷酸核酮糖(RuBP)羧化限制和RuBP再生限制可能是导致植物光合适应的主要因素。When measured at a same CO2 concentration, net photosynthetic rate is often significantly lower in long-term high CO2-grown plants than the ambient CO2-grown ones. This phenomenon is termed photosynthetic acclimation or downregulation. Although there have been many reports and reviews, the mechanism（s） of the photosynthetic acclimation is not very clear. Combining the work of the authors＇ group, this paper briefly reviews the progress in studies on the mechanism（s） of the photosynthetic acclimation to elevated CO2. It is suggested that besides the possible effects of respiration enhancement and excessive photosynthate accumulation, RuBP carboxylation limitation and RuBP regeneration limitation are probably the main factors leading to the photosynthetic acclimation.

关 键 词：CO2浓度增高 光合适应 RuBP羧化限制 RuBP 再生限制 细胞色素f 

分 类 号：Q945[生物学—植物学]