Ecology and physiology of phototrophic bacteria and sulfate-reducing bacteria in marine salterns |
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Authors: | P Caumette |
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Institution: | (1) Laboratoire d'Océanographie Biologique, Centre d'Océanographie et de Biologie Marine, 2 rue Pr. Jolyet, F-33120 Arcachon, (France) |
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Abstract: | Marine salterns are habitats for a large variety of halophilic bacteria. In the anoxic zones, halophilic sulfur bacteria develop mainly at the sediment surface, but only a few of them have so far been isolated from such environments. Among the phototrophic sulfur bacteria that sometimes form purple layers underneath the green cyanobacterial layers, members of the generaEctothiodhodospira, Chromatium (C. salexigens), Thiocapsa (T. halophila) were isolated. They grow by using sulfide as an electron donor. In the marine salterns, sulfide originates from active sulfate reduction. Among the halophilic sulfate-reducing bacteria, onlyDesulfovibrio halophilus andDesulfohalobium retbaense have so far been isolated. The ecology and physiology of both kinds of bacteria are discussed in this paper. |
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Keywords: | Phototrophic bacteria sulfate-reducing bacteria marine salterns halophilic sulfur bacteria |
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