TABLE 1.
Tolerance of “F. myxofaciens” P3G to some transition metals and comparison with iron-oxidizing acidithiobacilli
| Metal | Concn (mM) of metala: |
|||
|---|---|---|---|---|
| “F. myxofaciens” P3G | Acidithiobacillus ferrooxidans type strain | Acidithiobacillus ferrivorans type strain | Acidithiobacillus ferridurans type strain | |
| Fe2+ | ≥100 | 400 (200) | 400 (200) | 600 (400) |
| Fe3+ | 100 (50) | 400 (200) | <100 | 300 (200) |
| Mn2+ | 30 (20) | ND | ND | ND |
| Al3+ | >100 | 400 (300) | 400 (300) | 400 (300) |
| Cu2+ | 40 (30) | 500 (400) | <50 | 300 (200) |
| Zn2+ | >100 | 1000 (800) | 300 (200) | 1000 (800) |
| Ni2+ | 5 (1) | 200 (100) | 300 (200) | 300 (200) |
| MoO42− | <0.5 | 0.25 (0.10) | <0.10 | 0.10 (0.04) |
a
Data show concentrations of metals that completely inhibited ferrous iron oxidation by the bacteria listed, and numbers in parentheses show the highest metal concentrations where iron oxidation was observed. ND, not determined.