Cytochrome c oxidase of the cyanobacterium Synechocystis sp. PCC 6803 protects photosynthesis from salt stress

We generated cytochrome c oxidase (CtaI)-defective cells of the cyanobacterium Synechocystis sp. PCC 6803 in order to investigate the physiological function of the CtaI-mediated respiratory electron transport pathway. When they were salt stressed, CtaI-defective cells showed a substantial decrease i...

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Veröffentlicht in:	Molecules and cells 2003, 16(1), , pp.74-77
Hauptverfasser:	Ryu, Jee-Youn, Suh, Kye-Hong, Chung, Young-Ho, Park, Young-Mok, Chow, Wah Soon, Park, Youn-Il
Format:	Artikel
Sprache:	eng
Schlagworte:	Cyanobacteria - enzymology Electron Transport Complex IV - metabolism Light NADP - metabolism Photosynthesis - physiology Photosystem I Protein Complex - metabolism Photosystem II Protein Complex - metabolism Plant Proteins - metabolism Sodium Chloride - metabolism 생물학
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Zusammenfassung:	We generated cytochrome c oxidase (CtaI)-defective cells of the cyanobacterium Synechocystis sp. PCC 6803 in order to investigate the physiological function of the CtaI-mediated respiratory electron transport pathway. When they were salt stressed, CtaI-defective cells showed a substantial decrease in photosynthesis due to reduction of the photochemical efficiency of Photosystem II and of the chlorophyll in the reaction center of the photo-oxidizable form of Photosystem I. These findings demostrate that CtaI-mediated electron transport is important for resistance to salt stress.
ISSN:	1016-8478 0219-1032
DOI:	10.1016/S1016-8478(23)13768-X