Table 3.
Bacteria swimming speed and reversal frequency around metal oxide minerals.
| Strain | Mineral | Reversal frequency (reversals/s) | Speed (μm/s) | ||
|---|---|---|---|---|---|
| ≤2 μm | >2 μm | ≤2 μm | >2 μm | ||
| MR-1 | MnO2 | 0.97 ± 0.58a | 0.32 ± 0.48a | 24.37 ± 6k | 19.26 ± 11.2k |
| Fe(OH)3 | 0.74 ± 0.5b | 0.21 ± 0.39b | 18.12 ± 5.4l | 12.6 ± 5.4l | |
| SB2B | MnO2 | 1.657 ± 0.925c | 0.320 ± 0.462c | 37.7 ± 14.7m | 23.5 ± 8.79m |
| Fe(OH)3 | nr | nr | nr | nr | |
| PV-4 | MnO2 | 0.930 ± 0.3d | 0.519 ± 0.7d | 56.05 ± 35.8n | 48.49 ± 59.8n |
| Fe(OH)3 | 0.177 ± 0.34e | 0.586 ± 0.59e | 12.73 ± 6.1 | 13.57 ± 4.4 | |
| W3-18-1 | MnO2 | nr | nr | nr | nr |
| Fe(OH)3 | 0.228 ± 0.39 | 0.298 ± 0.27 | 15.54 ± 9.7p | 9.48 ± 1.5p | |
| CN32 | MnO2 | 1.371 ± 0.98g | 0.622 ± 0.49g | 34.98 ± 10.18q | 22.6 ± 8.4q |
| Fe(OH)3 | 0.573 ± 0.47h | 0.342 ± 0.39h | 17.86 ± 6.5r | 13.62 ± 5.1r | |
| ANA3 | MnO2 | 1.240 ± 0.91i | 0.416 ± 0.47i | 20.38 ± 3.7s | 14.71 ± 6.7s |
| Fe(OH)3 | 0.786 ± 0.45j | 0.426 ± 0.49j | 21.79 ± 7.7t | 13.87 ± 5.7t | |
Results
a−t
indicates significant difference of ± 2 S.D.
nr = no response. OS155, NCIMB400, and OS217 did not show response to minerals.