类囊体膜对光胁迫的适应机制

The mechanism of thylakoid membrane adapting to light stress

综述类囊体膜的膜脂结构组分,简述位于类囊体膜上的光系统II(PSII)、细胞色素b6f复合体(Cytb 6/f)、光系统I(PSI)和ATP合酶等4种光合大分子复合体的结构与蛋白组分,以及它们在高光强胁迫下参与光系统损伤与修复和光适应的调控机制,分析陆生植物为了更好地适应高光强胁迫逆境,而逐渐进化出的一套精细的适应机制。同时,提出当前研究中低丰度叶绿体蛋白结构和功能解析不足的问题,并对后续研究方向进行展望。

In photosynthesis,the light absorption,electron transfer and energy conversion require the participation of four major protein complexes embedded in the thylakoid membranes,including photosystem II(PSII),cytochrome b6f complex(Cytb 6/f),photosystem I(PSI),and ATP synthase.Land plants are often threatened by highly intensive light stress.In order to adapt to such an adverse environment,plants have gradually evolved a complicate adaptation mechanism to avoid photo damage.In this paper,the structural composition of thylakoid membrane lipids,and protein components of four major photosynthetic protein complexes locating on thylakoid membrane,as well as their regulatory mechanism involving in photo damage and repair of the photosystem under highly intensive light stress were reviewed.In addition,we pointed out that the structures and functions of numerous of low-abundance chloroplast small proteins are largely unknown due to the technical limited in the current research,and prospected the future research direction.