Table 2.
Characteristics that differentiate the strain PU-7 with the closely related species of the genus Bacillus
| Characteristic | PU-7 | Bacillus psychrodurans DSM 11713T | Bacillus psychrotolerans DSM 11706T | Bacillus insolitus DSM 5T |
|---|---|---|---|---|
| Cell morphology | Rods | Rods | Regular rods | Rods |
| Cell size (μm) | 0.6–0.7 × 1.6–2 | 0.5–0.6 × 2–5 | 0.4–1 × 2–7 | 1.0–1.5 × 1.6–2.7 |
| Nitrate reduction | − | + | − | − |
| Salinity tolerance (%) | 9 | 5 | 3 | 2 |
| Temperature range (°C) | 18–40 | −2 to 30 | −2 to 30 | 0–25 |
| Anaerobic growth | − | + | − | − |
| β-Galactosidase | − | w | − | + |
| Lysine decarboxylase | − | w | w | + |
| Ornithine decarboxylase | − | + | + | + |
| Nitrate reduction | − | + | − | + |
| Hydrolysis of | ||||
| DNA | − | + | + | + |
| Gelatin | − | + | − | + |
| Starch | − | + | + | − |
| Tween 60 | + | w | + | − |
| Urea | + | − | − | w |
| Acid production from | ||||
| d-Glucose, | + | + | w | − |
| l-Arabinose, | − | w | w | − |
| d-Xylose | + | w | w | − |
| d-Mannitol | + | + | w | − |
| Utilization of | ||||
| Citrate | + | − | − | + |
+ positive, − negative, w weak