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Review a viewpoint: why chlorophyll a?.
| Content Provider | CiteSeerX |
|---|---|
| Author | Olof, Lars George, Björn Æ Papageorgiou, C. Robert, Æ Blankenship, E. Govindjee, Æ Björn, L. O. Papageorgiou, G. C. Blankenship, R. E. |
| Abstract | Abstract Chlorophyll a (Chl a) serves a dual role in oxygenic photosynthesis: in light harvesting as well as in converting energy of absorbed photons to chemical energy. No other Chl is as omnipresent in oxygenic photosynthesis as is Chl a, and this is particularly true if we include Chl a2, (=[8-vinyl]-Chl a), which occurs in Prochlorococcus, asa type of Chl a. One exception to this near universal pattern is Chl d, which is found in some cyanobacteria that live in filtered light that is enriched in wavelengths [700 nm. They trap the long wavelength electronic excitation, and convert it into chemical energy. In this Viewpoint, we have traced the possible reasons for the near ubiquity of Chl a for its use in the primary photochemistry of Photosystem II (PS II) that leads to water oxidation and of Photosystem I (PS I) that leads to ferredoxin reduction. Chl a appears to be unique and irreplaceable, particularly if global scale oxygenic photosynthesis is considered. Its uniqueness is |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Oxygenic Photosynthesis Near Ubiquity Long Wavelength Electronic Excitation Water Oxidation Possible Reason Chl A2 P Ii Light Harvesting Near Universal Pattern 8-vinyl Chl Abstract Chlorophyll Filtered Light Absorbed Photon Asa Type Primary Photochemistry Photosystem Ii Chemical Energy Global Scale Oxygenic Photosynthesis Dual Role |
| Content Type | Text |
