ArticleThe Plant journal : for cell and molecular biology2026
Moderate overexpression of PROTON GRADIENT REGULATION 5 improves photosynthetic performance and plant growth under fluctuating low light in Arabidopsis thaliana.
Article in The Plant journal : for cell and molecular biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Cyclic electron transport around photosystem I (PSI) plays an important role in regulating photosynthesis by balancing ATP/NADPH production and maintaining PSI function under fluctuating light. Although PGR5-dependent photosynthetic regulation has been extensively studied under high or fluctuating light, its physiological significance under prolonged low irradiance interrupted by transient increases in light remains less well understood. Here, we analyzed Arabidopsis thaliana lines with different levels of PGR5 accumulation to investigate how PGR5 abundance influences photosynthetic regulation and plant performance under controlled fluctuating light conditions. Moderate PGR5 accumulation was associated with faster photosynthetic induction, improved PSI redox regulation, and greater biomass accumulation under the 100 μmol photons m
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