Low pH‐induced regulation of excitation energy between the two photosystems. Issue 6 (13th February 2014)

• Record Type: Journal Article
• Authors: Jajoo, Anjana; Mekala, Nageswara Rao; Tongra, Teena; Tiwari, Arjun; Grieco, Michele; Tikkanen, Mikko; Aro, Eva-Mari
• Is Part Of: FEBS letters. Volume 588:Issue 6(2014)
• Page Start: 970
• Page End: 974
• Publication Date: 2014-02-13
• Subjects: Low pH -- Photosystem II -- Photosystem I -- PsbS -- Energy spillover; Biochemistry -- Periodicals; Biophysics -- Periodicals; Molecular biology -- Periodicals; Biochimie -- Périodiques; Biochemistry; Biophysics; Molecular biology; Periodicals; 572.05
• DOI: 10.1016/j.febslet.2014.01.056
• Languages: English
• ISSNs: 0014-5793

Abstract

Abstract : Earlier studies have proposed that low pH causes state transitions in spinach thylakoid membranes. Several Arabidopsis mutants ( stn7 incapable in phosphorylation of LHC II, stn8 incapable in phosphorylation of PSII core proteins, stn7 stn8 double mutant and npq4 lacking PsbS and hence qE) were used to investigate the mechanisms involved in low pH induced changes in the thylakoid membrane. We propose that protonation of PsbS at low pH is involved in enhancing energy spillover to PS I. Abstract : Low pH regulates energy distribution between PS II and PS I. Protonation of PsbS is involved in regulating energy spillover. State transitions are not involved in low pH induced changes.