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

D. White, R. J. Sharp, F. G. Priest

    Research output: Contribution to journalArticle

    Abstract

    Two hundred and thirty-four thermophilic Bacillus 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 to B. 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 of B. 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.

    Original languageEnglish
    Pages (from-to)357-386
    Number of pages30
    JournalAntonie van Leeuwenhoek, International Journal of General and Molecular Microbiology
    Volume64
    Issue number3-4
    DOIs
    Publication statusPublished - 1993

    Keywords

    • Bacillus
    • nomenclature
    • taxonomy
    • thermophile

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