Table 1.
Comparison of electrokinetic response to MFC current production in Shewanella strains and mutants
| Response to: | ||||||||
| Electron acceptors (activity radii, μm) | Electrode (activity radii, μm) | |||||||
| Shewanella strains/mutants | None | MnO2 | Fe(OH)3 | MnO2 + AQDS | Fe(OH)3 + AQDS | 0 mV | +600 mV | Current production(relative to MR-1) |
| S. oneidensis MR-1 | nr | <200 | nr | <550 | <350 | nr | 100–200 | ++ |
| MR-1 ∆cheA3 | nr | nr | nr | <550 | <400 | nr | 100–200 | +++ |
| MR-1 ∆cymA | nr | nr | nr | nd | nd | nr | nr | — |
| MR-1 ∆mtrA | nr | nr | nr | <550 | <450 | nr | nr | — |
| MR-1 ∆mtrB | nr | nr | nr | <550 | <450 | nr | nr | — |
| S. amazonensis SB2B | nr | <450 | nr | nd | nd | nr | 100–200 | ++ |
| S. putrefaciens CN32 | nr | <250 | nr | nd | nd | nr | <100 | + |
nr, no or negligible response; nd, not determined; ++, current production of wild-type MR-1.