Non-photochemical quenching of fluorescence in cyanobacteria - PubMed (original) (raw)

Review

. 2007 Oct;72(10):1127-35.

doi: 10.1134/s0006297907100100.

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Review

Non-photochemical quenching of fluorescence in cyanobacteria

N V Karapetyan. Biochemistry (Mosc). 2007 Oct.

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Abstract

The pathways of energy dissipation of excessive absorbed energy in cyanobacteria in comparison with that in higher plants are discussed. Two mechanisms of non-photochemical quenching in cyanobacteria are described. In one case this quenching occurs as light-induced decrease of the fluorescence yield of long-wavelength chlorophylls of the photosystem I trimers induced by inactive reaction centers: P700 cation-radical or P700 in triplet state. In the other case, non-photochemical quenching in cyanobacteria takes place with contribution of water-soluble protein OCP (containing 3 -hydroxyechinenone) that induces reversible quenching of allophycocyanin fluorescence in phycobilisomes. The possible evolutionary pathways of the involvement of carotenoid-binding proteins in non-photochemical quenching are discussed comparing the cyanobacterial OCP and plant PsbS protein.

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