A security network in PSI photoprotection: regulation of photosynthetic control, NPQ and O-2 photoreduction by cyclic electron flow

作者：Chaux Frederic; Peltier Gilles; Johnson Xenie^*

来源：Frontiers in Plant Science, 2015, 6: 875.

DOI：10.3389/fpls.2015.00875

• cyclic electron flow
• PSI photoinhibition
• non-photochemical quenching
• oxygen photoreduction
• luminal acidification
• photosynthetic control
• ATP
• malate valve

Cyclic electron flow (CEF) around PSI regulates acceptor-side limitations and has multiple functions in the green alga, Chlamydomonas reinhardtii. Here we draw on recent and historic literature and concentrate on its role in Photosystem I (PSI) photoprotection, outlining causes and consequences of damage to PSI and CEF's role as an avoidance mechanism. We outline two functions of CEF in PSI photoprotection that are both linked to luminal acidification: firstly, its action on Photosystem II with non-photochemical quenching and photosynthetic control and secondly, its action in poising the stroma to overcome acceptor-side limitation by rebalancing NADPH and ATP ratios for carbon fixation.

• 出版日期2015-10-15
• 单位中国地震局