Phylum Firmicutes, Class Bacilli, Order Bacillales, Family Bacillaceae, Genus Bacillus, Bacillus gibsonii Nielsen, Fritze & Priest 1995.
Stout rods, 0.6-1.0 x 2.0-3.0 µm, forming subterminally, ellipsoidal (0.6-1.0 x 0.8-1.6
µm) endospores (in ageing cultures are paracentrally and occasionally laterally) in
Colonies are yellow, smooth, shiny and circular. Aerobic. Alkalitolerant. Growth
occurs at pH 7 & 8 (optimum) and at 20 - 30 ºC (variable growth at 10 & 37 ºC).
Allantoin, urate or NaCl are not required for growth. Growth occurs in nutrient broth
with 2 - 9% NaCl added. Variable growth in 10% & 12% NaCl.
Isolated from soil.
- 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.
- 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 lactose utilization, hydrolysis of gelatin & casein.
Negative results for glycogen utilization, N-acetylglucosamine utilization, deamination
of phenylalanine, hydrolysis of hippurate, hydrolysis of starch, hydrolysis of pullulan,
hydrolysis of Tween 20 & 80.
Variable results for nitrate reduction, hydrolysis of Tween 40 & 60.
(c) Costin Stoica