Ryu, Jee-YounSuh, Kye-HongChung, Young-HoPark, Young-MokChow, Wah S (Fred)Park, Youn-Il2015-12-132015-12-131234-123xhttp://hdl.handle.net/1885/77047We 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.Keywords: cytochrome c oxidase; nicotinamide adenine dinucleotide phosphate; sodium chloride; vegetable protein; chlorophyll; article; Cyanobacterium; enzymology; light; metabolism; photosynthesis; photosystem I; photosystem II; physiology; electron transport; enzy Cytochrome c Oxidase; Respiration; Salt Stress; Synechocystis20032015-12-11