Table 1.
Phenotypic comparison of soda lake isolates with related bacteria from the class Chrysiogenetes
| Characteristic | AHT11 | AHT19 | Desulfurispirillum alkaliphilum | Chrysiogenes arsenatis |
|---|---|---|---|---|
| Cell morphology | Spirillum with bipolar flagellum | Spirillum with bipolar flagellum | Spirillum with bipolar flagellum | Vibrio, single polar flagellum |
| Autotrophic growth | − | − | − | − |
| Electron donors | ||||
| H2 | + | − | + | − |
| Formate | + | − | − | − |
| Acetate, pyruvate, lactate malate, succinate, fumarate | + | + | + | + |
| Propionate | + | + | + | − |
| Citrate | − | − | + | − |
| Glycerol | + | − | − | − |
| Electron acceptors | ||||
| O2 | − | − | − | − |
| Sulfur (polysulfide) | + | + | + | − |
| NO3 −, NO2 − (to NH3) | − | − | + | + |
| N2O | − | − | − | − |
| Fumarate | − | − | + | − |
| AsO4 2− | + | + | − | + |
| DMSO, SeO4 2−, Fe3+, S2O3 2− | − | − | − | − |
| Oxidation of HS− with nitrate | − | − | + | n.d. |
| pH range (optimum) | 8.5–10.9 (10.2) | 8.2–10.5 (9.8) | 8.0–10.2 (9.0) | Neutrophilic |
| Salt range (M Na+) | 0.2–3.0 | 0.2–3.0 | 0.1–2.5 | Na-independent |
| Habitat | Soda lakes | Soda lakes | Bioreactor | Gold mine |
n.d. not determined