ArticlePlant physiology2021
Proton motive force in plant photosynthesis dominated by ΔpH in both low and high light.
Article in Plant physiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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Who cites it
18 citing papers in PubMed, 33 citations in OpenAlex.
- Pathway(s) and distribution of photosystem II-cyclic electron flow.Biochemical Society transactions · 2026Review
- Disequilibrium between chloroplast proton motive force and ATP levels in Arabidopsis.Nature plants · 2026Article
- Proton motive force partitioning links energy and redox balance to photoprotection and carbon gain.Frontiers in plant science · 2026Review
- PROTON GRADIENT REGULATION 5 enables efficient C4 photosynthesis under fluctuating light.Plant physiology · 2025Article
- Plants maximise chloride uptake during early vegetative development to stimulate cell expansion, maturation of the photosynthetic apparatus, and growth.The Plant journal : for cell and molecular biology · 2025Article
- Shrink or expand? Just relax! Bidirectional grana structural dynamics as early light-induced regulator of photosynthesis.The New phytologist · 2025Article
- The regulation of PSI cyclic electron transport by both plastoquinone and ferredoxin redox states: correlation with the rate of proton motive force utilization.Frontiers in plant science · 2025Article
- Photosynthetic control at the cytochrome b6f complex.The Plant cell · 2024Review
- Chloroplast ATP synthase: From structure to engineering.The Plant cell · 2024Review
- From leaf to multiscale models of photosynthesis: applications and challenges for crop improvement.Photosynthesis research · 2024Review
- Impact of engineering the ATP synthase rotor ring on photosynthesis in tobacco chloroplasts.Plant physiology · 2023Article
- High cyclic electron transfer via the PGR5 pathway in the absence of photosynthetic control.Plant physiology · 2023Article
- Regulation of NADP-Malic Enzyme Activity in Maize (Plants (Basel, Switzerland) · 2023Article
- Rieske FeS overexpression in tobacco provides increased abundance and activity of cytochrome bPhysiologia plantarum · 2022Article
- The Structural and Spectral Features of Light-Harvesting Complex II Proteoliposomes Mimic Those of Native Thylakoid Membranes.The journal of physical chemistry letters · 2022Article
- Flavodiiron proteins enhance the rate of CO2 assimilation in Arabidopsis under fluctuating light intensity.Plant physiology · 2022Article
- Chloroplast pH Homeostasis for the Regulation of Photosynthesis.Frontiers in plant science · 2022Review
- A minute-scale P515 kinetic traces light-driven proton gradient formation in dark-incubated Synechocystis sp. PCC 6803.Physiologia plantarumArticle
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Authors and funding
3 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The proton motive force (pmf) across the thylakoid membrane couples photosynthetic electron transport and ATP synthesis. In recent years, the electrochromic carotenoid and chlorophyll absorption band shift (ECS), peaking ∼515 nm, has become a widely used probe to measure pmf in leaves. However, the use of this technique to calculate the parsing of the pmf between the proton gradient (ΔpH) and electric potential (Δψ) components remains controversial. Interpretation of the ECS signal is complicated by overlapping absorption changes associated with violaxanthin de-epoxidation to zeaxanthin (ΔA505) and energy-dependent nonphotochemical quenching (qE; ΔA535). In this study, we used Arabidopsis (Arabidopsis thaliana) plants with altered xanthophyll cycle activity and photosystem II subunit S (PsbS) content to disentangle these overlapping contributions. In plants where overlap among ΔA505, ΔA535, and ECS is diminished, such as npq4 (lacking ΔA535) and npq1npq4 (also lacking ΔA505), the parsing method implies the Δψ contribution is virtually absent and pmf is solely composed of ΔpH. Conversely, in plants where ΔA535 and ECS overlap is enhanced, such as L17 (a PsbS overexpressor) and npq1 (where ΔA535 is blue-shifted to 525 nm) the parsing method implies a dominant contribution of Δψ to the total pmf. These results demonstrate the vast majority of the pmf attributed by the ECS parsing method to Δψ is caused by ΔA505 and ΔA535 overlap, confirming pmf is dominated by ΔpH following the first 60 s of continuous illumination under both low and high light conditions. Further implications of these findings for the regulation of photosynthesis are discussed.
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