Thiocapsa halophila sp. nov., a new halophilic phototrophic purple sulfur bacterium |
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| Authors: | Pierre Caumette Renée Baulaigue Robert Matheron |
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| Institution: | (1) Institut de Biologie Marine, 2 rue du Professeur Jolyet, F-33120 Arcachon, France;(2) Laboratoire de Microbiologie, Faculté des Sciences et Techniques de Saint-Jérôme, F-13397 Marseille Cedex 13, France |
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| 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.Dedicated to Prof. Dr. Norbert Pfennig in occasion of his 65th birthday |
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| Keywords: | Chromatiaceae Thiocapsa Okenone Hypersaline environment Halophilic bacteria Microbial mats |
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