Microbial Communities in Composite Biofilms Participating in the Degradation of PCB |
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| Authors: | Wolf-Rainer Abraham Heinrich Lünsdorf Carsten Strömpl Balbina Nogales Edward R B Moore Kenneth N Timmis |
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| Institution: | (1) GBF – German Research Center for Biotechnology, Environmental Microbiology, D-38124 Braunschweig, Germany (author for correspondence;(2) Universitat de les Illes Balears (UIB), Palma de Mallorca, Spain;(3) The Macaulay Research Inst., Aberdeen, United Kingdom |
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| Abstract: | A moorland soil site polluted with PCB showed a high diversity ofmetabolically active bacteria. Beside frequent types of 16S rRNAsequences similar to those of the species ofSphingomonasand the Acidobacterium phylum an unusual high number ofsequences from the genus Burkholderia were found. Burkholderia was also the main genus in isolates enriched onbiphenyl or various chlorobenzoates. In microcosm experimentssterilized surfaces exposed to PCB polluted soil always showed thepresence of clay aggregates formed by bacteria attached to thesubstratum. The bacteria use the PCB loaded clay colloids astransport medium for the water insoluble substrate to get accessto the carbon source. This is a novel mechanism of how bacteria dealwith hydrophobic substrates. |
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| Keywords: | Burkholderia clay aggregates composite biofilm moorland soil polychlorinated biphenyl |
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