Cytochrome c oxidase of the cyanobacterium Synechocystis sp. PCC 6803 protects photosynthesis from salt stress
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Authors
Ryu, Jee-Youn
Suh, Kye-Hong
Chung, Young-Ho
Park, Young-Mok
Chow, Wah S (Fred)
Park, Youn-Il
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Korean Society of Molecular and Cell Biology
Abstract
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.
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Molecules and Cells