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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

High bacterial diversity of a waste gas-degrading community in an industrial biofilter as shown by a 16S rDNA clone library.

The bacterial diversity of an industrial biofilter used for waste gas abatement in an animal-rendering plant was investigated. A 16S rDNA clone library was generated and 444 clones were screened using computer-aided amplified ribosomal DNA restriction analysis (ARDRA). Of the screened clones, 60.8% showed unique ARDRA patterns and the remaining 174 clones were clustered into 65 groups. Almost full-length 16S rDNA sequences of 106 clones were determined and 90.5% of the clones were affiliated with the two phyla Proteobacteria and Bacteroidetes. Alpha-, Beta-, and Gammaproteobacteria accounted for 22.1, 17.6 and 18.6% respectively. Minor portions were affiliated with the Actinobacteria (2.0%), Firmicutes and Verrucomicrobia (both 1.0%), and the Deltaproteobacteria and Thermomicrobia (each 0.5%). Only six out of the 106 16S rDNA sequences exhibited similarities of more than 97% to classified bacterial species indicating that a substantial fraction of the clone sequences were derived from unknown taxa. It was also evaluated whether a database containing 281 computer-simulated bacterial rDNA fragment patterns generated from published reference sequences can be used for identification purposes. The data analysis demonstrated that this was possible only for a small number of clones, which were closely related to described bacterial strains. Rarefaction analysis of ARDRA clusters demonstrated that the 444 clones screened are insufficient to describe the entire diversity of the clone library.[1]


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