title: Low pH-induced regulation of excitation energy between the two photosystems.
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.
authors: School of Life Science, Devi Ahilya University, Indore, M.P., India. Electronic address: anjanajajoo@hotmail.com.
authors: Anjana
authors: A
authors: Jajoo
authors: Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland.
authors: Nageswara Rao
authors: NR
authors: Mekala
authors: School of Life Science, Devi Ahilya University, Indore, M.P., India.
authors: Teena
authors: T
authors: Tongra
authors: Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland.
authors: Arjun
authors: A
authors: Tiwari
authors: Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland.
authors: Michele
authors: M
authors: Grieco
authors: Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland.
authors: Mikko
authors: M
authors: Tikkanen
authors: Department of Biochemistry, Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland. Electronic address: evaaro@utu.fi.
authors: Eva-Mari
authors: EM
authors: Aro
mesh_terms: D017360:Arabidopsis / Q000528:radiation effects*; D006863:Hydrogen-Ion Concentration; D045331:Photosystem I Protein Complex / Q000737:chemistry*; D045332:Photosystem II Protein Complex / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D020524:Thylakoids / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D045331:Photosystem I Protein Complex; D045332:Photosystem II Protein Complex
keywords: Energy spillover; Low pH; Photosystem I; Photosystem II; PsbS