Previous Article | Next Article ![]()
Appl. Environ. Microbiol., 07 1997, 2802-2813, Vol 63, No. 7
JJ Godon, E Zumstein, P Dabert, F Habouzit and R Moletta
The bacterial community structure of a fluidized-bed reactor fed by
vinasses (wine distillation waste) was analyzed. After PCR amplification,
four small-subunit (SSU) rDNA clone libraries of Bacteria, Archaea,
Procarya, and Eucarya populations were established. The community structure
was determined by operational taxonomic unit (OTU) phylogenetic analyses of
579 partial rDNA sequences (about 500 bp long). A total of 146 OTUs were
found, comprising 133, 6, and 7 from the Bacteria, Archaea, and Eucarya
domains, respectively. A total of 117 bacterial OTU were affiliated with
major phyla: low-G+C gram- positive bacteria,
Cytophaga-Flexibacter-Bacteroides, Proteobacteria, high-G+C gram-positive
bacteria, and Spirochaetes, where the clone distribution was 34, 26, 17, 6,
and 4%, respectively. The other 16 bacterial OTUs represent 13% of the
clones. They were either affiliated with narrow phyla such as
Planctomyces-Chlamydia, green nonsulfur bacteria, or Synergistes, or deeply
branched on the phylogenetic tree. A large number of bacterial OTUs are not
closely related to any other hitherto determined sequences. The most
frequent bacterial OTUs represents less than 5% of the total bacterial SSU
rDNA sequences. However, the 20 more frequent bacterial OTUs describe at
least 50% of these sequences. Three of the six Archaea OTUs correspond to
95% of the Archaea population and are very similar to already known
methanogenic species: Methanosarcina barkeri, Methanosarcina frisius, and
Methanobacterium formicicum. In contrast, the three other Archaea OTUs are
unusual and are related to thermophilic microorganisms such as Crenarchaea
or Thermoplasma spp. Five percent of the sequences analyzed were chimeras
and were removed from the analysis.
Copyright © 1997, American Society for Microbiology
Molecular microbial diversity of an anaerobic digestor as determined by small-subunit rDNA sequence analysis
Laboratoire de Biotechnologie de l'Environnement, Institut National de la Recherche Agronomique, Narbonne, France. godon@ensam.inra.fr
This article has been cited by other articles:
Copyright © 2009 by the American Society for Microbiology. For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»