In situ analysis of sulfate-reducing bacteria related to Desulfocapsa thiozymogenes in the chemocline of meromictic Lake Cadagno (Switzerland).
Comparative sequence analysis of a 16S rRNA gene clone library from the chemocline of the meromictic Lake Cadagno (Switzerland) retrieved two clusters of sequences resembling sulfate-reducing bacteria within the family Desulfovibrionaceae. In situ hybridization showed that, similar to sulfate-reducing bacteria of the family Desulfobacteriaceae, bacteria of one cluster with similarity values to the closest cultured relatives of between 92.6 and 93.1% resembled free cells or cells loosely attached to other cells or debris. Bacteria of the second cluster closely related to Desulfocapsa thiozymogenes DSM7269 with similarity values between 97. 9 and 98.4% were generally associated with aggregates of different small-celled phototrophic sulfur bacteria, suggesting a potential interaction between the two groups of bacteria.
Tonolla
M
M
Cantonal Institute of Bacteriology, Microbial Ecology, University of Geneva, CH-6904 Lugano, Switzerland. mauro.tonolla@ti.ch
Demarta
A
A
Peduzzi
S
S
Hahn
D
D
Peduzzi
R
R
D015342:DNA Probes; D020564:Deltaproteobacteria / Q000145:classification / Q000235:genetics* / Q000502:physiology; D005618:Fresh Water / Q000382:microbiology*; D015723:Gene Library; D020459:Genes, rRNA; D017403:In Situ Hybridization; D008856:Microscopy, Fluorescence; D008969:Molecular Sequence Data; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D016999:Sulfur-Reducing Bacteria / Q000145:classification / Q000235:genetics* / Q000502:physiology*; D013557:Switzerland; D014871:Water Microbiology
D015342:DNA Probes; D012336:RNA, Ribosomal, 16S