光合电子传递及其改善  

Photosynthetic electron transports and their improvements

作　　者：米华玲 朱新广 MI Hua-Ling;ZHU Xin-Guang(Center for Excellence in Molecular Plant Sciences,Chinese Academy of Sciences,Shanghai 200032,China)

机构地区：[1]中国科学院分子植物科学卓越创新中心,上海200032

出　　处：《生命科学》2024年第9期1168-1174,共7页Chinese Bulletin of Life Sciences

基　　金：上海市“科技创新行动计划”基础研究项目(23JC1403900);国家重点研发计划(2020YFA0907600)。

摘　　要：光合电子传递是继光能化学反应之后的光反应过程,包括线性电子传递和围绕光系统Ⅰ的环式电子传递两种类型。线性电子传递产生ATP和NADPH,用于光合碳同化;而环式电子传递只产生ATP,没有NADPH的形成。在原核光合生物蓝藻中,还有光合电子传递的电子共用电子载体的交替电子传递途径。在正常条件下,线性电子传递为主要途径,环式电子传递占的比例很小;但在特殊时期,如稻麦灌浆期以及变动的环境条件下,环式电子传递会被诱导,从而发挥光破坏防御作用。本文综述光合电子传递的相关研究,并分析其遗传改造的可行性。Photosynthetic electron transport is one of the light reaction processes after light energy absorption and excitation.It includes two types,i.e.linear electron transport and cyclic electron transport around photosystemⅠ,where linear electron transport produces ATP and NADPH while cyclic electron transport produces only ATP without formation of NADPH.There are several alternative electron transports in prokaryotic organism cyanobacteria.Under optimal conditions,linear electron transport is a main pathway and the proportion of cyclic electron transport is very small,but in special periods,such as the grain filling stage of rice or wheat and changing environmental conditions,cyclic electron transport could be induced and play a protective role.In this mini-review,we summarize the relative researches on photosynthetic electron transport,and analyze the feasibility of its molecular modification for crops.

关 键 词：光合电子传递 线性电子传递 围绕光系统Ⅰ的环式电子传递 CO_(2)吸收 光破坏防御 

分 类 号：Q945.11[生物学—植物学]