Molecular design of the photosystem II light-harvesting antenna: photosynthesis and photoprotection

被引:344
作者
Horton, P [1 ]
Ruban, A [1 ]
机构
[1] Univ Sheffield, Dept Mol Biol & Biotechnol, Sheffield S10 2TN, S Yorkshire, England
关键词
light-harvesting complex; non-photochemical quenching; photoprotection; thylakoid membrane; xanthophyll cycle;
D O I
10.1093/jxb/eri023
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The photosystem II (PSII) light-harvesting system carries out two essential functions, the efficient collection of light energy for photosynthesis, and the regulated dissipation of excitation energy in excess of that which can be used. This dual function requires structural and functional flexibility, in which light-harvesting proteins respond to an external signal, the thylakoid DeltapH, to induce feedback control. This process, referred to as non-photochemical quenching (NPQ) depends upon the xanthophyll cycle and the PsbS protein. In nature, NPQ is heterogeneous in terms of kinetics and capacity, and this adapts photosynthetic systems to the specific dynamic features of the light environment. The molecular features of the thylakoid membrane which may enable this flexibility and plasticity are discussed.
引用
收藏
页码:365 / 373
页数:9
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