PCR for direct detection of indigenous uncultured magnetic cocci in sediment and phylogenetic analysis of amplified 16S ribosomal DNA

R. H. Thornhill, J. G. Burgess, Tadashi Matsunaga*

*この研究の対応する著者

研究成果: Article査読

27 被引用数 (Scopus)

抄録

PCR primers specific to the 16S ribosomal DNA (rDNA) of magnetic cocci were designed and used to amplify DNA from magnetically isolated magnetic cocci. The PCR products were subcloned by ligation into plasmid vector pCRII, and five clones containing approximately 270-bp fragments of amplified DNA were sequenced. The specific primers were also used to detect magnetic coccus 16S rDNA in environmental samples. Magnetic coccus 16S rDNA was amplified from the water column above sediment kept in an anoxic environment in the laboratory, but little was amplified from a water column kept in an oxic environment. These results suggest that magnetic cocci in the water column in an anoxic environment had migrated there from the sediment as a response to the microoxic or anoxic conditions, rather than having been present previously in a nonmagnetic form and having become magnetic due to these conditions. The specific primers were also used to detect magnetic cocci in aquatic sediment. DNA was extracted from sediment by direct lysis and purified for use as a PCR template by electrophoresis on an agarose- polyvinylpyrrolidone gel. 16S rDNA was then amplified and subcloned, and two clones were sequenced. The clones were screened for chimeric DNA by comparing sections of each with the GenBank database.

本文言語English
ページ(範囲)495-500
ページ数6
ジャーナルApplied and Environmental Microbiology
61
2
出版ステータスPublished - 1995
外部発表はい

ASJC Scopus subject areas

  • バイオテクノロジー
  • 環境科学(全般)
  • 微生物学

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