File(s) not publicly available
Photosynthetic acclimation: does the dynamic structure and macro-organisation of photosystem II in higher plant grana membranes regulate light harvesting states?
journal contribution
posted on 2023-06-08, 16:13 authored by Peter Horton, Matthew P Johnson, Maria L Perez-Bueno, Anett Kiss, Alexander V RubanThe efficiency of light harvesting in higher plant photosynthesis is regulated in response to external environmental conditions. Under conditions of excess light, the normally highly efficient light-harvesting system of photosystem II is switched into a state in which unwanted, potentially harmful, energy is dissipated as heat. This process, known as nonphotochemical quenching, occurs by the creation of energy quenchers following conformational change in the light-harvesting complexes, which is initiated by the build up of the thylakoid pH gradient and controlled by the xanthophyll cycle. In the present study, the evidence to support the notion that this regulatory mechanism is dependent upon the organization of the different antenna subunits in the stacked grana membranes is reviewed. We postulate that nonphotochemical quenching occurs within a structural locus comprising the PsbS subunit and components of the light-harvesting antenna, CP26, CP24, CP29 and LHCIIb (the major trimeric light-harvesting complex), formed in response to protonation and controlled by the xanthophyll cycle carotenoids.
History
Publication status
- Published
Journal
FEBS JournalISSN
1742-464XPublisher
Wiley-BlackwellExternal DOI
Issue
6Volume
275Page range
1069-1079Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2013-11-01Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC