Table 3 Siderophore, indole-3-acetic acid (IAA) and gibberellic acid (GA3) production by Streptomyces spp. isolates. PGRs Plant-growth regulators, CAS chrome azurol S
Isolate | Siderophore production | PGR production a | |
|---|---|---|---|
Halo diameter on CAS medium (mm)a | IAA (μg mL−1) | GA3 (μg mL−1) | |
TL1 | 00 | 44.4 ± 1.7 | 00 |
TL2 | 00 | 37.9 ± 0.4 | 00 |
TL3 | 00 | 84.1 ± 0. 6 | 00 |
TL4 | 26 ± 1.3 | 81.1 ± 1.2 | 42.7 ± 0.9 |
TL5 | 00 | 35.9 ± 0.5 | 00 |
TL6 | 08 ± 0.8 | 00 | 00 |
TL7 | 22 ± 1.3 | 117.1 ± 0.6 | 55.3 ± 0.7 |