Table 2.
Characterization of rhizobacterial isolates for plant growth promoting activities.
| Isolate | PS | CP | SP | ZS | HP | IP | PP | BF | AD | Antibacterial |
Antifungal |
||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Xac | Xoo | C | F | ||||||||||
| TRS-1 | - | - | + | + | + | + | + | + | - | ++ | +++ | ++ | - |
| TRS-2 | - | - | ++ | - | ++ | + | - | - | + | - | - | - | - |
| TRS-3 | - | - | + | + | + | ++ | +++ | - | - | - | - | - | - |
| TRS-4 | - | - | +++ | - | + | ++ | - | - | + | - | - | - | - |
| TRS-5 | +++ | - | ++ | - | + | ++ | - | - | - | + | +++ | - | - |
| TRS-7 | - | - | +++ | - | ++ | +++ | - | + | + | - | - | - | - |
| TRS-8 | - | - | +++ | +++ | + | +++ | + | - | + | - | - | - | - |
PS- Phosphate solubilization; CP- Chitinase production; SP- Siderophore production; ZS- Zinc solubilization; HP- HCN production; IP- IAA production; PP- Phytase production; BF- Biofilm formation; AD- ACC deaminase activity. ‘+’, positive; ‘-’, negative result for the test. For phosphate and zinc solubilization, siderophore and chitinase production, antifungal and antibacterial assay: ‘+’, zone of clearance <0.2 mm; ‘++’, zone of clearance 0.2–0.4 mm; ‘+++’, zone of clearance >0.4 mm. For IAA production: ‘+’, absorbance <0.1; ‘++’, absorbance 0.1–0.3; ‘+++’, absorbance >0.3. Xac- Xanthomonas axonopodis pv. citri; Xoo- Xanthomonas oryzae pv. oryzae; C- Curvularia sp.; F- Fusarium sp.