PGRL1-mediated cyclic electron flow is crucial for acclimation to anoxia and complementary to non-photochemical quenching in stress adaptation.

Data from PeptideAtlas, [[http://www.peptideatlas.org/PASS/PASS00384 PASS00384]]. Experiment: set1, file: BK_physco_16022013_1_27.mzML. Published as part of Plant Physiol. 2014 Jun 19 . From the Abstract: {{i}} To investigate the functional importance of PGRL1 for photosynthetic performances in the moss Physcomitrella patens, we generated a pgrl1 knockout mutant. Functional analysis revealed diminished non-photochemical quenching (NPQ) as well as decreased capacity for cyclic electron flow (CEF) in pgrl1. Under anoxia, where CEF is induced, quantitative proteomics evidenced severe down regulation of photosystems but up regulation of the chloroplast NDH complex, plastocyanin and CAS in the mutant, indicating that the absence of PGRL1 triggered mechanism compensatory for diminished CEF. ... {{/i}}