Photosynthetic Competence of the Marine Aerobic Anoxygenic Phototrophic Bacterium <i>Roseobacter</i> sp. under Organic Substrate Limitation

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Author(s)

    • Sato-Takabe Yuki
    • Graduate School of Environmental Science, Hokkaido University|Center for Marine Environmental Studies, Ehime University
    • Hamasaki Koji
    • Atmosphere and Ocean Research Institute, the University of Tokyo
    • Suzuki Koji
    • Graduate School of Environmental Science, Hokkaido University|Faculty of Environmental Earth Science, Hokkaido University

Abstract

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.

Journal

  • Microbes and Environments

    Microbes and Environments 29(1), 100-103, 2014

    Japanese Society of Microbial Ecology · The Japanese Society of Soil Microbiology

Codes

  • NII Article ID (NAID)
    130003390911
  • Text Lang
    ENG
  • ISSN
    1342-6311
  • Data Source
    J-STAGE 
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