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Aerobic and anaerobic microorganisms in modern sponges: A possible relationship to fossilization-processes
Citation key SchumannKindel1997
Author SchumannKindel, G. and Bergbauer, M. and Manz, W. and Szewzyk, U. and Reitner, J.
Pages 268–272
Year 1997
Journal Facies
Volume 36
Abstract In this study bacteria present in the tissue of the Mediterranean sponges Chondrosia reniformis and Petrosia ficiformis were examined by cultivation and culture-independent methods. In this approach, culture dependent techniques have been combined with in situ hybridization using fluorescently labeled rRNA-targeted oligonucleotide probes specific for Bacteria and subclasses of Proteobacteria. Hybridization of the the associated microbial populations in both sponges showed that the majority of bacteria are members of the gamma-subclass of Proteobacteria. Using highly specific oligonucleotide probes for detecting sulfate-reducing bacteria, distinct signals could be found scattered in native sponge tissue of both sponges. In all enrichment cultures with lactate as sole carbon source which were inoculated with tissue from the two sponges C. reniformis and P. ficiformis, bacteria could be detected by in situ hybridization using a highly specific probe for sulfate-reducing bacteria of the Desulfobacter-cluster. Not only sulfate-reducing bacteria were enriched but also other fermentative bacteria who are involved in the degradation of sponge tissue. Sulfate reducing bacteria may central the calcification of the sponge tissue during degradation because increasing the carbonate alkalinity.
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