Photosynthetic Competence of the Marine Aerobic Anoxygenic Phototrophic Bacterium <i>Roseobacter</i> sp. under Organic Substrate Limitation
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This paper describes the photosynthetic response of a <i>Roseobacter</i> strain of marine aerobic anoxygenic phototrophic bacteria to an organic substrate limitation. In batch cultures, higher values of the spheroidenone/bacteriochlorophyll <i>a</i> ratio were observed under substrate-deficient conditions. Interestingly, the maximum photochemical quantum efficiencies of the photosystem under substrate-deficient conditions using blue or green excitation were significantly higher than those under substrate-replete conditions. These results indicate that spheroidenone, which can absorb green light, may play an important role in their photosynthesis as a light-harvesting antenna pigment, and the photosynthetic competence of the <i>Roseobacter</i> strain can increase in an organic substrate-deficient environment.
- Microbes and Environments
Microbes and Environments 29(1), 100-103, 2014
Japanese Society of Microbial Ecology · The Japanese Society of Soil Microbiology