Table 1.
Growth conditions of halophilic alkalithermophiles
| Species | Source | Na+ concn (M) |
pH (Tmeasured [°C]) |
Temp (°C) |
|||
|---|---|---|---|---|---|---|---|
| Optimum | Range | Optimum | Range | Optimum | Range | ||
| Bacteria | |||||||
| Natranaerobius thermophilus | Wadi An Natrun, Egypt | 3.3–3.9 | 3.1–4.9 | 9.5 (55) | 8.5–10.6 (55) | 53 | 35–56 |
| Natranaerobius trueperi | Wadi An Natrun, Egypt | 3.8 | 3.1–5.4 | 9.5 (55) | 8.0–10.8 (55) | 52 | 26–55 |
| Natronovirga wadinatrunensis | Wadi An Natrun, Egypt | 3.9 | 3.3–5.3 | 9.9 (55) | 8.5–11.5 (55) | 51 | 26–56 |
| “Natranaerobius jonesii” | Lake Magadi, Kenya | 3.9 | 3.1–5.0 | 10.5 (60) | 8.5–11.5 (60) | 66 | 47–71 |
| “Natranaerobius grantii” | Lake Magadi, Kenya | 4.3 | 2.9–sat. | 9.5 (45) | 7.5–10 (45) | 46 | 31–52 |
| Halonatronum saccharophilum | Lake Magadi, Kenya | 2.05 | 0.5–2.9 | 8.5 (room temp) | 7.7–10.3 (room temp) | 55 | 18–60 |
| Dichotomicrobium thermohalophilum | Solar Lake near Eilat (Sinai) | 2.4 | 1.4–3.8 | 8.5 (room temp) | 5.8–9.5 | 50 | 20–65 |
| Archaea | |||||||
| Natronolimnobius aegyptiacus | Wadi An Natrun, Egypt | 4.5 | 2.9–5.5 | 9.5 (55) | 7.3–10.8 (55) | 54–57 | 29–65 |
| Natrialba hulunbeirensis | Soda lake, China | 3.4 | 2.0–5.1 | 9.0 (room temp) | 8.5–10.5 | 50 | 20–55 |