Table 1.
Screening for the production of PGP traits of various isolates.
| Traits | Isolates | |||
|---|---|---|---|---|
| N6 | H7 | B1 | V8 | |
| Plant Growth-Promoting (PGP) Traits | ||||
| Phytase activity (IU/mL) | 346.67 ± 2.77 | 329.73 ± 1.33 | 261.67 ± 3.41 | 312.71 ± 2.11 |
| P solubilization (µg/mL) | 3229.02 ± 8.52 | 876.04 ± 3.21 | 507.01 ± 4.56 | 513.05 ± 6.78 |
| Organic acid production | +++ | + | + | + |
| Nitrogen fixation | +++ | + | + | + |
| Ammonia production | +++ | + | + | + |
| Siderophore production | 79.0 ± 0.01 | 43.10 ± 0.01 | 52.11 ± 0.01 | 63.12 ± 0.01 |
| IAA production (µg/mL) | 78.45 ± 1.92 | 43.51 ± 3.91 | 5.22 ± 1.40 | 34.41 ± 1.7 |
| Salinity Ameliorating Traits | ||||
| ACCD (µM/mg/h) | 0.910 ± 1.21 | 0.782 ± 1.02 | 0.563 ± 1.01 | 0.312 ± 1.03 |
| EPS production (g/L) | 32.211 ± 1.21 | 8.12 ± 1.71 | 15.22 ± 1.91 | 23.20 ± 2.23 |
| Antioxidant Enzymes | ||||
| SOD (IU/mg protein) | 13.86 ± 1.03 | 10.15 ± 1.04 | 9.06 ± 1.21 | 7.84 ± 3.21 |
| CAT (IU/mg protein) | 0.07 ± 0.02 | 0.04 ± 0.01 | 0.02 ± 0.01 | 0.01 ± 0.06 |
| GSH (µg/mg protein) | 22.12 ± 6.54 | 17.11 ± 4.32 | 12.12 ± 3.32 | 9.13 ± 2.71 |
IAA = Indole acetic acid; ACCD = 1-aminocyclopropane-1-carboxylate deaminase; EPS = Exopolysachharide; SOD = Superoxide dismutase; CAT = Catalase; GSH = Glutathione reductase. + = present − = absent, ++ = positive, +++ = strong positive, Nd = not detected, % SU = % siderophore units. Values are the average of five replicates and were analyzed by one-way ANOVA followed by Turkey’s test.