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          Institute: MPI für Pflanzenzüchtungsforschung     Collection: Dept. Plant Breeding and Yield Physiology (Francesco Salamini)     Display Documents



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ID: 28773.0, MPI für Pflanzenzüchtungsforschung / Dept. Plant Breeding and Yield Physiology (Francesco Salamini)
A stable LHCII-PSI aggregate and suppression of photosynthetic state transitions in the psae1-1 mutant of Arabidopsis thaliana
Authors:Pesaresi, P.; Lunde, C.; Jahns, P.; Tarantion, D.; Meurer, J.; Varotto, C.; Hirtz, R. D.; Soave, C.; Scheller, H. V.; Salamini, F.; Leister, D.
Language:English
Date of Publication (YYYY-MM-DD):2002-10
Title of Journal:Planta
Journal Abbrev.:Planta
Volume:215
Issue / Number:6
Start Page:940
End Page:948
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:During photosynthetic state transitions, a fraction of the major light-harvesting complex (LHCII) shuttles between photosystems II (PSII) and I (PSI), depending on whether or not it is phosphorylated. Its phosphorylation state in turn depends on the relative activity of the two photosystems, which is a function of redox state and illumination parameters. In the psae1-1 mutant of Arabidopsis thaliana (L.) Heynh., amounts of the PSI subunits E, C, D, H and L are decreased. A fraction of LHCII is stably associated with PSI when plants are exposed to low light conditions, giving rise to a high-molecular-mass protein-pigment complex detectable in native protein gels. The formation of this abnormal LHCII-PSI complex is associated with an almost complete suppression of state transitions, a drastic increase in the levels of phosphorylated LHCII under all light regimes tested, and a permanent reduction in PSII antenna size. All these observations suggest that the altered polypeptide composition of PSI perturbs the docking of phosphorylated LHCII, making psae1-1 a unique mutant for the study of PSI- LHCII interactions and additional effects of the mutation, such as a decrease in grana stacking and increased adenylate kinase activity.
Free Keywords:Arabidopsis; mutant; photosynthesis; photosystem I; state transition
Comment of the Author/Creator:Date: 2002, OCT
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Pflanzenzüchtungsforschung
External Affiliations:Max Planck Inst Zuchtungsforsch, ZIGIA, Carl Von Linne Weg 10,; D-50829 Cologne, Germany; Max Planck Inst Zuchtungsforsch, ZIGIA, D-50829 Cologne, Germany; Royal Vet & Agr Univ, Dept Plant Biol, Plant Biochem Lab, DK-1871 Copenhagen C, Denmark; Univ Dusseldorf, Inst Biochem Pflanzen, D-40225 Dusseldorf, Germany; Univ Milan, Dipartimento Biol L Gorini, Sez Fisiol & Biochim Piante, I-20133 Milan, Italy; Univ Munich, Inst Bot, D-80638 Munich, Germany; Max Planck Inst Zuchtungsforsch, Cent Microscopy Serv Unit, CeMic, D-50829 Cologne, Germany; Max Planck Inst Zuchtungsforsch, Abt Pflanzenzuchtung & Ertragsphysiol, D-50829 Cologne, Germany
Identifiers:ISI:000178995100007 [ID No:1]
ISSN:0032-0935 [ID No:2]
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