Electron flow from PSII to PSI under high light is controlled by PGR5 but not by PSBS [PDF]
Frontiers in Plant Science, 2015 Absence of the PROTON GRADIENT REGULATION 5 (PGR5) protein from plant chloroplasts prevents the induction of strong trans-thylakoid proton gradient (ΔpH) and consequently also the thermal dissipation of excess energy (NPQ).
Mikko eTikkanen +2 more
doaj +7 more sources
Deletion of Proton Gradient Regulation 5 (PGR5) and PGR5-Like 1 (PGRL1) proteins promote sustainable light-driven hydrogen production in Chlamydomonas reinhardtii due to increased PSII activity under sulfur deprivation [PDF]
Frontiers in Plant Science, 2015 Continuous hydrogen photo-production under sulfur deprivation was studied in the Chlamydomonas reinhardtii pgr5 pgrl1 double mutant and respective single mutants.
Janina eSteinbeck +8 more
doaj +5 more sources
Over Expression of the Cyanobacterial Pgr5-Homologue Leads to Pseudoreversion in a Gene Coding for a Putative Esterase in Synechocystis 6803 [PDF]
Life, 2020 Pgr5 proteins play a major direct role in cyclic electron flow paths in plants and eukaryotic phytoplankton. The genomes of many cyanobacterial species code for Pgr5-like proteins but their function is still uncertain.
Ketty Margulis +7 more
doaj +5 more sources
PGR5-PGRL1-Dependent Cyclic Electron Transport Modulates Linear Electron Transport Rate in Arabidopsis thaliana [PDF]
Molecular Plant, 2022 Plants need tight regulation of photosynthetic electron transport for survival and growth under environmental and metabolic conditions. For this purpose, the linear electron transport (LET) pathway is supplemented by a number of alternative electron ...
Paolo Pesaresi +11 more
core +10 more sources
A Complex containing PGRL1 and PGR5 is involved in the switch between linear and cyclic electron flow in Arabidopsis [PDF]
Cell, 2008 SummaryDuring photosynthesis, two photoreaction centers located in the thylakoid membranes of the chloroplast, photosystems I and II (PSI and PSII), use light energy to mobilize electrons to generate ATP and NADPH. Different modes of electron flow exist,
R. Barbato +17 more
core +5 more sources
PGR5 and NDH-1 systems do not function as protective electron acceptors but mitigate the consequences of PSI inhibition [PDF]
Biochimica et Biophysica Acta (BBA) - Bioenergetics, 2020 Avoidance of photoinhibition at photosystem (PS)I is based on synchronized function of PSII, PSI, Cytochrome b6f and stromal electron acceptors. Here, we used a special light regime, PSI photoinhibition treatment (PIT), in order to specifically inhibit ...
Tikkanen M. +11 more
core +5 more sources
The role of PGR5 in the redox poising of photosynthetic electron transport
Biochimica et Biophysica Acta (BBA) - Bioenergetics, 2007 The pgr5 mutant of Arabidopsis thaliana has been described as being deficient in cyclic electron flow around photosystem I, however, the precise role of the PGR5 protein remains unknown.
Nandha, Beena +4 more
core +3 more sources
High cyclic electron transfer via the PGR5 pathway in the absence of photosynthetic control
Plant Physiology, 2023 The light reactions of photosynthesis couple electron and proton transfers across the thylakoid membrane, generating NADPH, and proton motive force (pmf) that powers the endergonic synthesis of ATP by ATP synthase.
Zoulias, N. +11 more
core +4 more sources
Inactivation of photosynthetic cyclic electron transports upregulates photorespiration for compensation of efficient photosynthesis in Arabidopsis [PDF]
Frontiers in Plant Science, 2023 Plants have multiple mechanisms to maintain efficient photosynthesis. Photosynthetic cyclic electron transports around photosystem I (CET), which includes the PGR5/PGRL1 and NDH pathways, and photorespiration play a crucial role in photosynthetic ...
Qi Chen +4 more
doaj +2 more sources
Partially dissecting the steady-state electron fluxes in Photosystem I in wild-type and pgr5 and ndh mutants of Arabidopsis [PDF]
Frontiers in Plant Science, 2015 Cyclic electron flux (CEF) around Photosystem I (PS I) is difficult to quantify. We obtained the linear electron flux (LEFO2) through both photosystems and the total electron flux through PS I (ETR1) in Arabidopsis in CO2-enriched air. DeltaFlux = ETR1
Jiancun eKou +6 more
doaj +3 more sources