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Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Bacillaceae, Genus Bacillus, Bacillus halodurans  Nielsen, Fritze and Priest
1995.
Historical synonyms:
Bacillus alcalophilus subsp. halodurans Boyer et al., 1973 (the type strain), Bacillus lentus type lll Gordon and
Hyde 1982.
Rods, 0.5-0.6 x 3.0-4.0 µm, occuring in long chains even when sporulated. Produce
subterminally, ellipsoidal (0.5-0.6 x 0.8-1.2 µm) endospores in slightly  swollen
sporangia.
Colonies are white with slightly filamentous margins. Aerobic. Alkaliphilic and
moderately halotolerant. Growth occurs at pH 7 to 10 (optimum pH 9-10) and at 15 -
55 ºC. Grow in nutrient broth with 2-12% NaCl added. Allantoin, urate or NaCl are not
required for growth.
Isolated from soil.
Unknown.
  1. 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.
  2. Nielsen P., Fritze D. and Priest F. G., 1995. Phenetic diversity of alkaliphilic Bacillus strains: proposal for nine new species.
    Microbiology 141, 1745-1761.
Positive results for hydrolysis of gelatin, hydrolysis of casein, hydrolysis of starch,
hydrolysis of Tween 40 & 60 .
Negative results for deamination of phenylalanine, hydrolysis of hippurate, hydrolysis of Tween 20 & 80.
Variable results for nitrate reduction.
(c) Costin Stoica
Bacillus halodurans
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