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Minor but key chlorophylls in Photosystem II
- Source :
- Photosynthesis Research. 84:201-207
- Publication Year :
- 2005
- Publisher :
- Springer Science and Business Media LLC, 2005.
-
Abstract
- A 'metal-free' chlorophyll (Chl) a, pheophytin (Phe) a, functions as the primary electron acceptor in PS II. On the basis of Phe a/PS II = 2, Phe a content is postulated as an index for estimation of the stoichiometry of pigments and photosystems. We found Phe a in a Chl d-dominant cyanobacterium Acaryochloris marina, whereas Phe d was absent. The minimum Chl a:Phe a ratio was 2:2, indicating that the primary electron donor is Chl a, accessory is Chl d, and the primary electron acceptor is Phe a in PS II of A. marina. Chl d was artificially formed by the treatment of Chl a with papain in aqueous organic solvents. Further, we will raise a key question on the mechanisms of water oxidation in PS II.
- Subjects :
- Chlorophyll
Pheophytin
Photosystem II
Stereochemistry
Acaryochloris marina
Chlorophyll d
Electron donor
macromolecular substances
Plant Science
Photochemistry
Biochemistry
Electron Transport
chemistry.chemical_compound
polycyclic compounds
Photosystem
chemistry.chemical_classification
Molecular Structure
biology
Chlorophyll A
Pheophytins
Eukaryota
Photosystem II Protein Complex
food and beverages
Cell Biology
General Medicine
Electron acceptor
biology.organism_classification
Energy Transfer
chemistry
Petroselinum
Subjects
Details
- ISSN :
- 15735079 and 01668595
- Volume :
- 84
- Database :
- OpenAIRE
- Journal :
- Photosynthesis Research
- Accession number :
- edsair.doi.dedup.....0734bf67a4e2a575382c70f12e4aab32
- Full Text :
- https://doi.org/10.1007/s11120-005-0474-y