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Int J Syst Evol Microbiol 57 (2007), 1663-1667; DOI  10.1099/ijs.0.64808-0
© 2007 International Union of Microbiological Societies

Reclassification of Bacillus axarquiensis Ruiz-García et al. 2005 and Bacillus malacitensis Ruiz-García et al. 2005 as later heterotypic synonyms of Bacillus mojavensis Roberts et al. 1994

Li-Ting Wang1, Fwu-Ling Lee1, Chun-Ju Tai1, Akira Yokota2 and Hsiao-Ping Kuo1

1 Bioresource Collection and Research Center, Food Industry Research and Development Institute, PO Box 246, Hsinchu 30099, Taiwan
2 Institute of Molecular and Cellular Biosciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-Ku, Tokyo 113-0032, Japan

Correspondence
Fwu-Ling Lee
fll{at}firdi.org.tw

The Bacillus subtilis group encompasses the taxa Bacillus subtilis subsp. subtilis, B. licheniformis, B. amyloliquefaciens, B. atrophaeus, B. mojavensis, B. vallismortis, B. subtilis subsp. spizizenii, B. sonorensis, B. velezensis, B. axarquiensis and B. malacitensis. In this study, the taxonomic relatedness between the species B. axarquiensis, B. malacitensis and B. mojavensis was investigated. Sequence analysis of the 16S rRNA gene and the gene for DNA gyrase subunit B (gyrB) confirmed the very high similarities between these three type strains and a reference strain of B. mojavensis (>99 and >97 %, respectively). DNA–DNA hybridization experiments revealed high relatedness values between the type strains of B. axarquiensis, B. malacitensis and B. mojavensis and between these strains and a reference strain of B. mojavensis (83–98 %). Based on these molecular taxonomic data and the lack of phenotypic distinctive characteristics, Bacillus axarquiensis and Bacillus malacitensis should be reclassified as later heterotypic synonyms of Bacillus mojavensis.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of B. axarquiensis strains CIP 108772T and LMG 22476T and B. malacitensis strains CECT 5687T and LMG 22477T are DQ993670–DQ993673, respectively, and the accession numbers of the gyrB gene sequences of these four strains are DQ903177–DQ903180, respectively.

Maximum-likelihood and maximum-parsimony trees based on 16S rRNA and gyrB gene sequences and details of fatty acid profiles and differential phenotypic characteristics of the studied strains are available with the online version of this paper.




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L.-T. Wang, F.-L. Lee, C.-J. Tai, and H.-P. Kuo
Bacillus velezensis is a later heterotypic synonym of Bacillus amyloliquefaciens
Int J Syst Evol Microbiol, March 1, 2008; 58(3): 671 - 675.
[Abstract] [Full Text] [PDF]


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