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Archives of Microbiology

, Volume 168, Issue 1, pp 39–45 | Cite as

Rhodospira trueperi gen. nov., spec. nov., a new phototrophic Proteobacterium of the alpha group

  • Norbert Pfennig
  • Heinrich Lünsdorf
  • Jörg Süling
  • J. F. Imhoff
Original paper

Abstract

A new phototrophic purple bacterium was isolated from a flat, laminated microbial mat in a salt marsh near Woods Hole, Mass., USA. The spiral-shaped bacterium was highly motile and had bipolar tufts of flagella and intracytoplasmic membranes of the vesicular type. The major photosynthetic pigments were identified as the carotenoid tetrahydrospirilloxanthin and bacteriochlorophyll b. The long wavelength in vivo absorption maximum of the bacteriochlorophyll was at 986 nm. The marine bacterium showed optimal growth in the presence of 2% NaCl. It utilized a number of organic substrates as carbon and energy sources and required vitamins and sulfide as a reduced sulfur source for growth. In the presence of sulfide, elemental sulfur globules were formed outside the cells. Elemental sulfur was not further oxidized to sulfate. The new isolate had a unique lipid and fatty acid composition, and according to the 16S rRNA gene sequence, it is most similar to Rhodospirillum rubrum. It is described as a new species and assigned to a new genus with the proposed name Rhodospira trueperi.

Key words Phototrophic bacteria Taxonomy New species New genus Rhodospira Bacteriochlorophyll Tetrahydrospirilloxanthin 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Norbert Pfennig
    • 1
  • Heinrich Lünsdorf
    • 2
  • Jörg Süling
    • 3
  • J. F. Imhoff
    • 3
  1. 1.Primelweg 12, D-88662 Überlingen, GermanyDE
  2. 2.Gesellschaft für Biotechnologische Forschung mbH, Mascheroder Weg 1, D-38124 Braunschweig, GermanyDE
  3. 3.Institut für Meereskunde, Düsternbrooker Weg 20, D-24105 Kiel, Germany Tel. +49-431-5973850; Fax +49-431-565876 e-mail: jimhof@ifm.uni-kiel.d400.deDE

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