植物光合作用中的捕光调节

Light-harvesting regulation in plant photosynthesis

在光波动的自然界中,植物已经发展出一系列捕光调节策略,以确保在弱光下实现光能利用最大化,而在强光下又避免光破坏。这些策略至少包括快响应(在几分钟内完成),如叶片运动、叶绿体运动与状态转换,以及慢适应(在几小时或几天内发生),如捕光天线蛋白丰度变化(天线大小的慢变化)与分子组成的改变。本综述从快响应到慢适应逐一讨论这些策略,特别是根据作者研究组的研究及有关新进展讨论天线大小的快变化,即光系统II一些捕光复合体(LHCIIs)从核心复合体的可逆脱离。

In the light-fluctuating nature plants have developed a series of strategies of light-harvesting regula- tion to ensure maximizing light utilization at low light and avoiding photodamage at high light. The strategies include at least rapid responses （performed within several minutes） such as leaf movement, chloroplast move- ment and state transitions, and slow acclimations （occurred in several hours or days） such as changes in the pro- tein abundance of light-harvesting antenna （slow change in antenna size） and modifications of molecular com- positions. This review discusses successively these strategies from fast responses to slow acclimations, especially the rapid change in antenna size, i.e. reversible dissociation of some light-harvesting complex of the photosystem II （LHCIIs） from photosystem II core complexes, based on the studies of author＇s group and new progress in this respect.