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Differential detection of type II methanotrophic bacteria in acidic peatlands using newly developed 16S rRNA-targeted fluorescent oligonucleotide probes

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Dedysh,  S.
Department of Biogeochemistry, Alumni, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Dunfield,  P.
Department of Biogeochemistry, Alumni, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Derakshani,  M.
Department of Biogeochemistry, Alumni, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Stubner,  S.
Department of Biogeochemistry, Alumni, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Heyer,  J.
Department of Biogeochemistry, Alumni, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Liesack,  W.
Department-Independent Research Group Methanotrophic Bacteria, and Environmental Genomics/Transcriptomics, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Citation

Dedysh, S., Dunfield, P., Derakshani, M., Stubner, S., Heyer, J., & Liesack, W. (2003). Differential detection of type II methanotrophic bacteria in acidic peatlands using newly developed 16S rRNA-targeted fluorescent oligonucleotide probes. FEMS Microbiology Ecology, 43, 299-308. doi:10.1111/j.1574-6941.2003.tb01070.x.


Cite as: https://hdl.handle.net/21.11116/0000-0007-CA2E-3
Abstract
Abstract Based on an extensive 16S rRNA sequence database for type II methanotrophic bacteria, a set of 16S rRNA-targeted oligonucleotide probes was developed for differential detection of specific phylogenetic groups of these bacteria by fluorescence in situ hybridisation (FISH). This set of oligonucleotides included a genus-specific probe for Methylocystis (Mcyst-1432) and three species-specific probes for Methylosinus sporium (Msins-647), Methylosinus trichosporium (Msint-1268) and the recently described acidophilic methanotroph Methylocapsa acidiphila (Mcaps-1032). These novel probes were applied to further characterise the type II methanotroph community that was detected in an acidic Sphagnum peat from West Siberia in a previous study (Dedysh et al. (2001) Appl. Environ. Microbiol. 67, 4850-4857). The largest detectable population of indigenous methanotrophs simultaneously hybridised with a group-specific probe targeting all currently known Methylosinus/Methylocystis spp. (M-450), with a genus-specific probe for Methylocystis spp. (Mcyst-1432), and with an additional probe (Mcyst-1261) that had been designed to target a defined phylogenetic subgroup of Methylocystis spp. The same subgroup of Methylocystis was also detected in acidic peat sampled from Sphagnum-dominated wetland in northern Germany. The population size of this peat-inhabiting Methylocystis subgroup was 2.0+/-0.1x10(6) cells g(-1) (wet weight) of peat from Siberia and 5.5+/-0.5x10(6) cells g(-1) of peat from northern Germany. This represented 60 and 95%, respectively, of the total number of methanotroph cells detected by FISH in these two wetland sites. Other major methanotroph populations were M. acidiphila and Methylocella palustris. Type I methanotrophs accounted for not more than 1% of total methanotroph cells. Neither M. trichosporium nor M. sporium were detected in acidic Sphagnum peat.