Preferential cultivation of type II methanotrophic bacteria from littoral sediments (Lake Constance)

Bussmann, Ingeborg; Pester, Michael; Brune, Andreas; Schink, Bernhard

Preferential cultivation of type II methanotrophic bacteria from littoral sediments (Lake Constance)

Dateien

2004_Bussmann_179_189.pdfGröße: 320.98 KBDownloads: ?

Datum

2004

Autor:innen

Bussmann, Ingeborg

Pester, Michael

Brune, Andreas

Schink, Bernhard

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

FEMS Microbiology Ecology. 2004, 47(2), pp. 179-189. eISSN 1574-6941. Available under: doi: 10.1016/S0168-6496(03)00260-5

Zusammenfassung

Most widely used medium for cultivation of methanotrophic bacteria from various environments is that proposed in 1970 by Whittenbury. In order to adapt and optimize medium for culturing of methanotrophs from freshwater sediment, media with varying concentrations of substrates, phosphate, nitrate, and other mineral salts were used to enumerate methanotrophs by the most probable number method. High concentrations (s1 mM) of magnesium and sulfate, and high concentrations of nitrate (s500 WM) significantly reduced the number of cultured methanotrophs, whereas phosphate in the range of 15^1500 WM had no influence. Also oxygen and carbon dioxide influenced the culturing efficiency, with an optimal mixing ratio of 17% O2 and 3% CO2 ; the mixing ratio of methane (6^32%) had no effect. A clone library of pmoA genes amplified by PCR from DNA extracted from sediment revealed the presence of both type I and type II methanotrophs. Nonetheless, the cultivation of methanotrophs, also with the improved medium, clearly favored growth of type II methanotrophs of the Methylosinus/Methylocystis group. Although significantly more methanotrophs could be cultured with the modified medium, their diversity did not mirror the diversity of methanotrophs in the sediment sample detected by molecular biology method.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

Cultivation, methanotroph, medium composition, terminal restriction fragment length polymorphism, sediment

Zitieren

ISO 690

BUSSMANN, Ingeborg, Michael PESTER, Andreas BRUNE, Bernhard SCHINK, 2004. Preferential cultivation of type II methanotrophic bacteria from littoral sediments (Lake Constance). In: FEMS Microbiology Ecology. 2004, 47(2), pp. 179-189. eISSN 1574-6941. Available under: doi: 10.1016/S0168-6496(03)00260-5

BibTex

@article{Bussmann2004Prefe-7634,
  year={2004},
  doi={10.1016/S0168-6496(03)00260-5},
  title={Preferential cultivation of type II methanotrophic bacteria from littoral sediments (Lake Constance)},
  number={2},
  volume={47},
  journal={FEMS Microbiology Ecology},
  pages={179--189},
  author={Bussmann, Ingeborg and Pester, Michael and Brune, Andreas and Schink, Bernhard}
}

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    <dcterms:abstract xml:lang="eng">Most widely used medium for cultivation of methanotrophic bacteria from various environments is that proposed in 1970 by Whittenbury. In order to adapt and optimize medium for culturing of methanotrophs from freshwater sediment, media with varying concentrations of substrates, phosphate, nitrate, and other mineral salts were used to enumerate methanotrophs by the most probable number method. High concentrations (s1 mM) of magnesium and sulfate, and high concentrations of nitrate (s500 WM) significantly reduced the number of cultured methanotrophs, whereas phosphate in the range of 15^1500 WM had no influence. Also oxygen and carbon dioxide influenced the culturing efficiency, with an optimal mixing ratio of 17% O2 and 3% CO2 ; the mixing ratio of methane (6^32%) had no effect. A clone library of pmoA genes amplified by PCR from DNA extracted from sediment revealed the presence of both type I and type II methanotrophs. Nonetheless, the cultivation of methanotrophs, also with the improved medium, clearly favored growth of type II methanotrophs of the Methylosinus/Methylocystis group. Although significantly more methanotrophs could be cultured with the modified medium, their diversity did not mirror the diversity of methanotrophs in the sediment sample detected by molecular biology method.</dcterms:abstract>
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