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Novel observations of Thiobacterium, a sulfur-storing Gammaproteobacterium producing gelatinous mats

Grünke, Stefanie, Lichtschlag, Anna, Beer, Dirk de, Kuypers, Marcel, Lösekann-Behrens, Tina, Ramette, Alban and Boetius, Antje (2010) Novel observations of Thiobacterium, a sulfur-storing Gammaproteobacterium producing gelatinous mats The ISME Journal, 4, (8), pp. 1031-1043. (doi:10.1038/ismej.2010.23).

Record type: Article

Abstract

The genus Thiobacterium includes uncultivated rod-shaped microbes containing several spherical grains of elemental sulfur and forming conspicuous gelatinous mats. Owing to the fragility of mats and cells, their 16S ribosomal RNA genes have not been phylogenetically classified. This study examined the occurrence of Thiobacterium mats in three different sulfidic marine habitats: a submerged whale bone, deep-water seafloor and a submarine cave. All three mats contained massive amounts of Thiobacterium cells and were highly enriched in sulfur. Microsensor measurements and other biogeochemistry data suggest chemoautotrophic growth of Thiobacterium. Sulfide and oxygen microprofiles confirmed the dependence of Thiobacterium on hydrogen sulfide as energy source. Fluorescence in situ hybridization indicated that Thiobacterium spp. belong to the Gammaproteobacteria, a class that harbors many mat-forming sulfide-oxidizing bacteria. Further phylogenetic characterization of the mats led to the discovery of an unexpected microbial diversity associated with Thiobacterium.

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More information

Published date: 2010
Keywords: gelatinous mats, microsensor, sulfur oxidizer, Thiobacterium
Organisations: Marine Geoscience

Identifiers

Local EPrints ID: 342675
URI: http://eprints.soton.ac.uk/id/eprint/342675
ISSN: 1751-7362
PURE UUID: 1a545e9b-1a35-4121-83c2-512c74e4c202

Catalogue record

Date deposited: 12 Sep 2012 10:46
Last modified: 18 Jul 2017 05:27

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Contributors

Author: Stefanie Grünke
Author: Anna Lichtschlag
Author: Dirk de Beer
Author: Marcel Kuypers
Author: Tina Lösekann-Behrens
Author: Alban Ramette
Author: Antje Boetius

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