Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Bacillaceae, Genus Bacillus, Bacillus mojavensis Roberts, Nakamura and
Cohan 1994 emend. Wang, Lee, Tai, Yokota and Kuo 2007.
Probably phenotypically distinguishable from B. atrophaeus, only by pigment production (failure to produce dark brown pigmented
colonies on media containing tyrosine or other organic nitrogen source) and a positive oxidase reaction. Probably phenotypically
indistinguishable from B. vallismortis, B. subtilis subsp. spizizenii and B. subtilis subsp. subtilis. Can be differentiated from these
species by DNA relatedness data, by the extent of sexual isolation, by restriction digest analysis of selected genes & by fatty acid
B. mojavensis is an earlier heterotypic synonym of B. axarquiensis Ruiz-García et al.
2005, and Bacillus malacitensis Ruiz-García et al. 2005.
Gram-positive, motile rods, 0.5-1.0 x 2.0-4.0 µm, central, paracentral, ellipsoidal
endospores (0.6-0.8 x 1.0-1.4µm) in unswollen sporangia.
Colonies are opaque, smooth, circular, up to 2 mm in diameter after 2 days at 28 ºC,
Aerobic. Growth is observed at pH 6-7; temperature range 10-55 ºC (optimum 30 ºC).
NaCl is not required for growth, 10% NaCl tolerance. Allantoin or urate are not
Isolated from desert soils and brackish sediments. No growth with lysozyme present.
- N.A. Logan and P. De Vos, 2009. Genus I. Bacillus Cohn 1872. In: (Eds.) P.D. Vos, G. Garrity, D. Jones, N.R. Krieg, W. Ludwig, F.A.
Rainey, K.-H. Schleifer, W.B. Whitman. Bergey’s Manual of Systematic Bacteriology, Volume 3: The Firmicutes, Springer, 21-127.
- M.S. Roberts,L.K. Nakamura, and F.M. Cohan, 1994. Bacillus mojavensis sp. nov., Distinguishable from Bacillus subtilis by Sexual
Isolation, Divergence in DNA Sequence, and Differences in Fatty Acid Composition. IJSB 44, 2, 256-264.
- L.-T. Wang, F.-L. Lee, C.-J. Tai, A. Yokota and H.-P. Kuo, 2007. Reclassiﬁcation of Bacillus axarquiensis Ruiz-Garcı´a et al. 2005
and Bacillus malacitensis Ruiz-Garcı´a et al. 2005 as later heterotypic synonyms of Bacillus mojavensis Roberts et al. 1994. IJSEM
Biochemically very close to Bacillus subtilis
Positive results for hydrolysis of gelatin, catalase, oxidase, hydrolysis of casein, hydrolysis of starch, Voges-Proskauer reaction,
beta-galactosidase, acid production from: L-arabinose, D-glucose, D-mannitol, mannose salicin, cellobiose, fructose, maltose,
ribose, sorbitol, sucrose & trehalose.
Negative results for degradation of tyrosine, arginine dihydrolase, ornithine decarboxylase, lysine decarboxylase, deamination of
phenylalanine, hydrolysis of urea, indole production, H2S production, hydrolysis of Tween 80, tryptophan deaminase, egg yolk
reaction, acid production from: lactose & melibiose.
Variable results for nitrate reduction, citrate utilization, acid production from: galactose, meso-inositol, inulin, methyl beta-xyloside,
beta-gentibiose, raffinose, rhamnose & D-xylose,
(c) Costin Stoica