Table 5.
Determination of the growth-promotion ability of phosphate-solubilizing bacteria.
| Strain no | Soluble phosphorus content (mg L−1) | Nitrogenase activity (C2H2 nmol mL−1 h−1) | ACC deaminase (µmol mg−1 h−1) | IAA (µg mL−1) | Siderophore D/d |
|---|---|---|---|---|---|
| HRP2 | 123.73 ± 7.17a | 83.06 ± 2.50a | 0.78 ± 0.03a | 7.64 ± 0.61c | 0.91 ± 0.03b |
| JLP2 | 44.51 ± 2.2.52f | – | – | 12.42 ± 0.67b | – |
| SSP2 | 116.51 ± 1.96b | 76.09 ± 2.79b | 0.22 ± 0.03c | 6.27 ± 0.75c | 0.88 ± 0.06b |
| JRP13 | 67.76 ± 2.26e | – | – | 11.51 ± 0.82b | – |
| JRP22 | 79.36 ± 1.54c | 73.19 ± 2.24b | 0.50 ± 0.02b | 14.44 ± 1.10a | 1.81 ± 0.08a |
| JRP23 | 74.74 ± 1.67d | – | – | – | 0.72 ± 0.03cf |
| JRP24 | 67.21 ± 1.67e | – | – | – | 0.87 ± 0.05b |
ACC 1-aminocyclopropane-1-carboxylate deaminase, IAA indole-3-acetic acid.
Significant differences among the seven bacterial strains for each growth promotion indicator were determined using one-way analysis of variance at p < 0.05. The data are shown as mean ± SD (n = 3).
Different lowercase letters represent significant differences among strains isolated from Chinese fir at p < 0.05.