ArticlePlant physiology2026
Cyclic electron flow around photosystem I provides energy production and photoprotection in C4 plants.
Article in Plant physiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
2 citing papers in PubMed.
- Selective Stabilization of PSI-Associated Electron Transport Network Underlies Cytokinin-Mediated Delay of Leaf Senescence in Barley.International journal of molecular sciences · 2026Article
- Probing the power grid of C4 plants: how the cyclic electron transport fuels and protects photosynthesis.Plant physiology · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
Abstract
C4 photosynthesis requires more ATP than C3 photosynthesis to drive the C4 cycle, which concentrates CO2 in the bundle sheath cells. This ATP demand is expected to be met by cyclic electron transport around photosystem I. Of the 2 cyclic electron transport pathways, PROTON GRADIENT REGULATION 5 (PGR5)/PGR5-like photosynthetic phenotype 1 (PGRL1)-dependent and chloroplast NADH dehydrogenase-like (NDH)-dependent, ATP is supplied primarily by the NDH-dependent pathway in NADP-malic enzyme-type C4 plants. However, the roles of these pathways in photoprotection of photosystem I have not been fully evaluated in C4 plants. In this study, we used Flaveria bidentis knockdown lines targeting PGRL1 or NdhO and their double-knockdown lines to investigate the redox state of the electron transport chain and high light sensitivity of photosystems. The double-knockdown line exhibited poorer growth than the FbNdhO-RNAi line, indicating that both pathways were essential for ATP production. The acceptor side of P700 was limited under high light conditions in the FbNdhO-RNAi line, while it was limited under lower to high light conditions in the FbPGRL1-RNAi and double-knockdown lines. Ferredoxin was reduced more in the FbPGRL1-RNAi line than in the wild type, and it was even more reduced in the double-knockdown line. Photoinhibition caused by high light exposure was more pronounced in photosystem I than in photosystem II in these lines. These results demonstrate that both cyclic electron transport pathways are essential not only for ATP production required for growth but also for protecting photosystem I from photoinhibition by alleviating the acceptor-side limitations of P700 in C4 plants.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.