Table 1.
Stress tolerance and plant growth-promoting traits of salt-tolerant Pseudomonas fluorescens Z1B4 from Zanthoxylum alatum Roxb.
| Plant growth-promoting attribute | Activity/Growth | |
|---|---|---|
| Tricalcium phosphate solubilization [μ:g/ml] | 615.3 ± 2.96 | |
| Auxin production [μ:g/ml] | 17.0 ± 1.15 | |
| Siderophore production [zone, mm] | 18.7 ± 1.20 | |
| Ammonia production | ++ | |
| 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity | + | |
| Hydrogen cyanide (HCN) production | +++ (strong) | |
| Antagonism against fungal pathogens (percentage inhibition) | Fusarium verticillioides | 52.0 ± 1.45 |
| Curvularia lunata | 38.5 ± 1.02 | |
| Alternaria alternata | 27.0 ± 1.20 | |
| Growth at different temperatures [°C] | 10 | + |
| 15 | +++ | |
| 20 | +++ | |
| 25 | +++ | |
| 30 | +++ | |
| 35 | ++ | |
| 40 | + | |
| Growth at different pH | 5 | ++ |
| 6 | +++ | |
| 7 | +++ | |
| 8 | + | |
| 9 | – | |
| NaCl [%] | 5 | +++ |
| 7.5 | ++ | |
| 10 | – | |
| CaSO4 [%] | 2.5 | +++ |
| 5 | +++ | |
| CaCO3 [%] | 2.5 | +++ |
| 5 | ++ | |
| CaCl2 [%] | 2.5 | ++ |
| 5 | – | |
Values represent the mean of three replicates ± standard error of the mean (SEmean); (+++) – strong activity/luxuriant growth, (++) – moderate activity/good growth, (+) – weak activity/ poor growth, (–) – no activity/no growth