Microorganisms Isolated from Deep Sea Low-temperature Influenced Oceanic Crust Basalts and Sediment Samples Collected along the Mid-Atlantic Ridge |
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| Authors: | Kristina Rathsack Erko Stackebrandt Joachim Reitner Gabriela Schumann |
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| Institution: | 1. DSMZ –Deutsche Sammlung von Mikroorganismen und Zellkulturen , 38124, Braunschweig, Germany;2. Geowissenschaftliches Zentrum der Universit?t G?ttingen (GZG) , Abt. Geobiologie, 37077, G?ttingen, Germany;3. DSMZ –Deutsche Sammlung von Mikroorganismen und Zellkulturen , 38124, Braunschweig, Germany;4. Geowissenschaftliches Zentrum der Universit?t G?ttingen (GZG) , Abt. Geobiologie, 37077, G?ttingen, Germany;5. Fraunhofer Gesellschaft , Hansastraβe 27C, 80686, München, Germany |
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| Abstract: | Basalt and sediment samples were collected (at 1,460–2,996 m of water depth) along the Mid-Atlantic-Ridge. The microbial diversity was analysed by aerobic cultivation on three different media enriched for manganese- and sulphur-oxidising bacteria. Phylogenetic analyses of bacterial isolates revealed affiliations to the classes Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, Actinobacteria and Bacilli. Our data revealed significant differences in the occurrence and diversity of these communities between the respective deep seafloor biosphere sources. Among 138 genotypes, 12 putatively unknown isolates were detected. Characterisation of selected isolates revealed high tolerances against a broad range of temperatures, pH-values and salt concentrations. |
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| Keywords: | Ascension Fracture Zone bacteria basalt deep biosphere diversity Mid-Atlantic-Ridge (MAR) |
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