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Archives of Microbiology

, Volume 155, Issue 2, pp 170–176 | Cite as

Thiocapsa halophila sp. nov., a new halophilic phototrophic purple sulfur bacterium

  • Pierre Caumette
  • Renée Baulaigue
  • Robert Matheron
Original Papers

Abstract

A new phototrophic sulfur bacterium has been isolated from a red layer in a laminated mat occurring underneath a gypsum crust in the mediterranean salterns of Salin-de-Giraud (Camargue, France). Single cells were coccus-shaped, non motile, without gas vacuoles and contained sulfur globules. Bacteriochlorophyll a and okenone were present as major photosynthetic pigments. These properties and the G+C content of DNA (65.9–66.6 mol% G+C) are typical characteristics of the genus Thiocapsa. However, the new isolate differs from known species in the genus, particularly in NaCl requirement (optimum, 7% NaCl; range, 3–20% NaCl) and some physiological characteristics. Therefore, a new species is proposed, Thiocapsa halophila, sp. nov.

Key words

Chromatiaceae Thiocapsa Okenone Hypersaline environment Halophilic bacteria Microbial mats 

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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Pierre Caumette
    • 1
  • Renée Baulaigue
    • 2
  • Robert Matheron
    • 2
  1. 1.Institut de Biologie MarineArcachonFrance
  2. 2.Laboratoire de MicrobiologieFaculté des Sciences et Techniques de Saint-JérômeMarseille Cedex 13France

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