Institute of Botany, Chinese Academy of Sciences, Beijing, China.
J Biol Chem. 2020 Oct 23;295(43):14546-14547. doi: 10.1074/jbc.H120.016039.
Vascular plants combat the excess photon bombarding of high-light conditions with several protective mechanisms. Despite decades of extensive research, new regulatory mech-anisms for photoprotection may remain unknown. Kim now report that the monomeric disordered form of photosystem II (PSII), which is present in higher abundance in the native thylakoid membrane in response to high light, possesses an energy-quenching capability superior to that of the multimeric ordered phase, suggesting a new shielding strategy against high-light stress by altering the macro-organization of PSII supercomplexes.
维管植物通过多种保护机制来应对高光条件下过量的光子轰炸。尽管经过了几十年的广泛研究，但可能仍有新的光保护调节机制不为人知。金现在报告说，在高光下，以更高丰度存在于天然类囊体膜中的光系统 II（PSII）单体无序形式具有比多聚有序相更优越的能量猝灭能力，这表明通过改变 PSII 超复合物的宏观组织来对抗高光胁迫的一种新的屏蔽策略。
