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Article

Regulatory plasticity balances photosynthetic electron flow with enhanced pH-dependent cytochrome b6f control in Arabidopsis.

Plant physiology - 2 Jul 2026

Kobayashi Ryouhei, Shimatani Zenpei, Nishida Keiji, Shikanai Toshiharu

Abstract excerpt

To avoid photodamage of photosystem I under fluctuating light, plants have evolved multiple photoprotective mechanisms. One key mechanism is photosynthetic control, in which acidification of the thylakoid lumen downregulates electron transport through the cytochrome b6f complex, thereby preventing overreduction of photosystem I. The Arabidopsis proton gradient regulation 5 (pgr5) mutant, which is defective in...

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Identifiers

PMID: 42319120
DOI: 10.1093/plphys/kiag391
PMCID: PMC13421779

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