Table 1.
Phosphorus releasing ability of PGPR
| Isolates | PGPR activities | Inorganic phosphate | Organic phosphate | IAA production | pH | ||
|---|---|---|---|---|---|---|---|
| SI | P content(mg/L) | SI | P content (mg/L) | ||||
| P 1 (Klebsilla pneumoniae) | Organic and inorganic P solubilizing, IAA production | 1.73 | 172.28 ± 3.15 | + | ++ | 5.32 | |
| P 2 (Klebsiella sp.) | Inorganic P solubilizing, IAA production | 1.52 | 109.25 ± 3.15 | – | ++ | 5.46 | |
| P 3 (Enterobacter asburiae) | Organic and inorganic P solubilizing, IAA production | 2.38 | 189.19 ± 3.91 | + | + | 5.13 | |
| P 4 (Raoultella sp.) | Inorganic P solubilizing, IAA production | 1.17 | 95.79 ± 3.78 | – | + | 5.78 | |
| P 5 (Klebsiella variicola) | Organic and inorganic P solubilizing, IAA production | 2.56 | 231.68 ± 3.13 | + | +++ | 4.96 | |
| P 6 (Agrobacterium sp.) | Inorganic P solubilizing | 1.32 | 67.18 ± 3.74 | – | – | 6.32 | |
| P 7 (Rhizobium sp.) | Inorganic P solubilizing, IAA production | 1.89 | 140.21 ± 3.81 | – | + | 5.96 | |
| P 8 (Enterobacter sp.) | Organic P solubilizing, IAA production | – | 2.87 | 13.64 ± 1.00 | + | 6.78 | |
| P 9 (Klebsiella sp.) | Organic and inorganic P solubilizing, IAA production | + | 2.50 | 29.93 ± 2.47 | +++ | 5.63 | |
| P 10 (Enterobacter sp.) | Organic P solubilizing | – | 2.00 | 8.49 ± 0. 7 | – | 6.37 | |
| P 11 (Comamonas SP.) | Organic P solubilizing, IAA production | – | 4.57 | 40.40 ± 1.90 | + | 5.26 | |
| Control | – | 1.23 ± 0.12 | – | 0.67 ± 0.07 | – | 7.02 | |
Note: + means the isolate can solubilize organic, inorganic phosphate or produce IAA, − means the isolate can not solubilize organic/inorganic phosphate