| Literature DB >> 15511532 |
Jean-Charles Cadoret1, Raphaël Demoulière, Johann Lavaud, Hans J van Gorkom, Jean Houmard, Anne-Lise Etienne.
Abstract
The chlorophyll-protein CP43' (isiA gene) induced by stress conditions in cyanobacteria is shown to serve as an antenna for Photosystem II (PSII), in addition to its known role as an antenna for Photosystem I (PSI). At high light intensity, this antenna is converted to an efficient trap for chlorophyll excitations that protects system II from photo-inhibition. In contrast to the 'energy-dependent non-photochemical quenching' (NPQ) in chloroplasts, this photoprotective energy dissipation in cyanobacteria is triggered by blue light. The induction is proportional to light intensity. Induction and decay of the quenching exhibit the same large temperature-dependence.Entities:
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Year: 2004 PMID： 15511532 DOI： 10.1016/j.bbabio.2004.08.001
Source DB: PubMed Journal: Biochim Biophys Acta ISSN： 0006-3002