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Redox- and Pump Intensity Dependence of Energy Transfer in Chlorosomes of cb. Phaeobacteroides

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Photosynthesis: Mechanisms and Effects

Abstract

Chlorosomes are the main antenna complexes of green sulfur bacteria containing rodlike aggregates of bacteriochlorophyll c, d, e (Bchl), and a small amount of Bchl a located in the chlorosomal baseplate. The latter is believed to mediate the energy transfer to the membrane pigments. The overall transfer is strongly redox regulated, probably to prevent charge separation in the presence of oxygen, which can lead to autooxidative damage of the reaction centres (1). Under oxidising conditions the excited states of Bchl c, d, e are considerably quenched, and in particular, the transfer efficiency to the baseplate is strongly decreased. Quinones as well as Bchl radicals seem to play a role in this quenching mechanism (2,3).

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References

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Author information

Authors and Affiliations

  1. Department of Physical Chemistry, University of Umeå, S-901 87, Umeh, Sweden

    J. Aschenbrücker, Y.-Z. Ma & T. Gillbro

  2. Institute of Biochemistry, Odense University, DK-5230, Odense M, Denmark

    M. Miller

Authors
  1. J. Aschenbrücker
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  2. Y.-Z. Ma
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  3. M. Miller
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  4. T. Gillbro
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Editor information

Editors and Affiliations

  1. Biological Research Center, Hungarian Academy of Sciences, Szeged, Hungary

    G. Garab

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© 1998 Springer Science+Business Media Dordrecht

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Aschenbrücker, J., Ma, YZ., Miller, M., Gillbro, T. (1998). Redox- and Pump Intensity Dependence of Energy Transfer in Chlorosomes of cb. Phaeobacteroides. In: Garab, G. (eds) Photosynthesis: Mechanisms and Effects. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3953-3_37

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  • DOI: https://doi.org/10.1007/978-94-011-3953-3_37

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-0-7923-5547-2

  • Online ISBN: 978-94-011-3953-3

  • eBook Packages: Springer Book Archive

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