Microbes and Environments
Online ISSN : 1347-4405
Print ISSN : 1342-6311
ISSN-L : 1342-6311
Short Communications
Photosynthetic Competence of the Marine Aerobic Anoxygenic Phototrophic Bacterium Roseobacter sp. under Organic Substrate Limitation
Yuki Sato-TakabeKoji HamasakiKoji Suzuki
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2014 年 29 巻 1 号 p. 100-103


This paper describes the photosynthetic response of a Roseobacter strain of marine aerobic anoxygenic phototrophic bacteria to an organic substrate limitation. In batch cultures, higher values of the spheroidenone/bacteriochlorophyll a 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 Roseobacter strain can increase in an organic substrate-deficient environment.

© 2014 by the Japanese Society of Microbial Ecology / the Japanese Society of Soil Microbiology
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