Antonie van Leeuwenhoek

, Volume 64, Issue 3–4, pp 357–386 | Cite as

A polyphasic taxonomic study of thermophilic bacilli from a wide geographical area

  • Duncan White
  • Richard J. Sharp
  • Fergus G. Priest


Two hundred and thirty-four thermophilicBacillus strains isolated from geographically widespread locations were examined by phenotypic characterisation followed by numerical analysis. The strains were distributed between eighteen cluster-groups which were subsequently evaluated in DNA base composition and DNA sequence homology studies. The inclusion of type and reference strains unambiguously identified strains related toB. licheniformis, B. pallidus, B. smithii, B. stearothermophilus, B. thermocloacae and B. thermoglucosidasius. Other reference strains included in distinctive groups were ‘B. caldotenax’, together with ‘B. caldovelox’ and ‘B. caldolyticus’,B. kaustophilus and ‘B. thermodenitrificans’. An emended description ofB. kaustophilus is provided. It is proposed that ‘B. caldotenax’ and ‘B. thermodenitrificans’ should be accepted as validly described species. Members of other clusters that appeared to have distinctive characteristics, including beta-glucanase production and the ability to degrade tyrosine, may provide the nuclei of further novel species.

Key words

Bacillus nomenclature thermophile taxonomy 


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Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • Duncan White
    • 1
  • Richard J. Sharp
    • 2
  • Fergus G. Priest
    • 3
  1. 1.Department of Plant and Soil ScienceUniversity of AberdeenAberdeenUK
  2. 2.Microbiology and Environmental Research GroupSalisburyUK
  3. 3.Department of Biological SciencesHeriot Watt UniversityEdinburghUK

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