TABLE 4.
Growth pH range and Fe(II) formation assay results for five selected isolates
| Genus, strain | Growth pH range (optimal growth pH)a | Schwertmanniteb |
Goethiteb |
||||
|---|---|---|---|---|---|---|---|
| pH on day: |
Amt of Fe(II) (mM) on day 22 | pH on day: |
Amt of Fe(II) (mM) on day 22 | ||||
| 0 | 22 | 0 | 22 | ||||
| Acidobacteria sp. | |||||||
| YE3-D1-20 | 2.5-5.0 (3.5) | 3.0 ± 0.0 | 4.0 ± 0.2 | 3.1 ± 0.3 | 3.2 ± 0.2 | 3.2 ± 0.1 | 0.6 ± 0.3 |
| Alicyclobacillus spp. | |||||||
| FeSo-D4-20-CH | 1.5-6.0 (3.5) | 3.0 ± 0.0 | 3.6 ± 0.6 | 2.4 ± 1.6 | 3.1 ± 0.2 | 2.9 ± 0.2 | 0.1 ± 0.1 |
| YE4-D4-4i-CH | 2.5-5.0 (3.5) | 3.0 ± 0.1 | 3.9 ± 0.1 | 3.6 ± 0.0 | 3.0 ± 0.0 | 3.0 ± 0.1 | 0.9 ± 0.2 |
| Acidocella sp. | |||||||
| YE4-N1-5-CH | 2.5-4 (2.5) | 3.0 ± 0.0 | 3.6 ± 0.4 | 2.6 ± 0.8 | 3.2 ± 0.2 | 3.1 ± 0.2 | 0.7 ± 0.2 |
| Unknown Dyella-like genus sp. | |||||||
| YE3-D1-10-CH | 2.0-5.0 (3.5) | 3.0 ± 0.0 | 4.0 ± 0.1 | 3.6 ± 0.6 | 3.3 ± 0.1 | 3.3 ± 0.2 | 0.8 ± 0.1 |
| Control | 3.1 ± 0.0 | 2.8 ± 0.0 | 0.1 ± 0.1 | 3.1 ± 0.0 | 3.0 ± 0.0 | 0.1 ± 0.1 | |
a
Tested in the YE media under oxic conditions without the presence of Fe(III) minerals.
b
Tested in the YE media under microoxic conditions.