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Growth and N2-fixing activity of soybean plants inoculated with Bradyrhizobium japonicum USDA110 or the nosZ mutanta
| Strain | Growth (g [fresh wt] plant−1)
|
N2-fixing activity (C2H2-reducing activity) (μmol h−1 g of nodule [fresh wt]−1) | ||
|---|---|---|---|---|
| Shoot | Root | Nodule | ||
| USDA110 | 10.8 ± 0.7 | 4.8 ± 0.4 | 1.0 ± 0.1 | 10.3 ± 1.3 |
| USDA110ΔnosZ | 10.4 ± 0.9 | 4.5 ± 0.4 | 0.9 ± 0.1 | 9.0 ± 2.0 |
| Uninoculated | 6.9 ± 0.2 | 5.5 ± 0.2 | 0 | 0 |
Values for growth and N2-fixing activity are shown as means ± SDs, with six replications.
