Table 5. Symbiotic properties of 5 and 6 week old bean plants.
| Strain | Genotype | AR(µmol h−1 plant−1) | Nodule number | AR per nodule (nmol h−1) | AR(µmol h−1 plant−1) | Nodule number | AR per nodule (nmol h−1) |
| 5 weeks | 6 weeks | ||||||
| RU2222 | wild-type | 3.3±0.1 | 502±31 | 6.6±0.8 | 4.5±0.4 | 751±30 | 6.0±0.3 |
| RU1933 | aapJQM::ΩSpbraE::TnphoA | 2.0±0.2 | 347±15 | 5.5±0.9 | 2.2±0.3 | 369±46 | 6.1±0.4 |
The rates of acetylene reduction and numbers of nodules by plants inoculated with RU1933 were significantly different from those of plants inoculated with wild-type RU2222 (p = 0.01; n≥6). ND = not determined. P-values were determined by ttest.