Table 5.
Heavy metal tolerance profile of ten potential PGPR strains at a varying concentration of HMs.
| S. No. | Isolates | Tolerance (μg/ml) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fe 50 | Fe 100 | Fe 300 | Mn 50 | Mn 100 | Mn 300 | Cu 50 | Cu 100 | Cu 300 | Zn 50 | Zn 100 | Zn 300 | Pb 50 | Pb 100 | Pb 300 | % (R) | ||
| 1 | Bacillus thuringiensis BS-45 | T | T | T | T | T | S | T | T | T | T | T | T | T | T | T | 90 |
| 2 | Enterococcus gallinarum PS-16 | T | T | T | T | T | T | T | S | S | T | T | S | T | T | T | 70 |
| 3 | Paenibacillus polymyxa FB-50 | T | T | T | T | T | T | T | T | T | T | T | T | T | T | T | 100 |
| 4 | Agrobacterium tumefaciens RS-79 | T | T | T | T | T | T | T | T | S | T | T | S | T | T | T | 80 |
| 5 | Ochrobactrum intermedium RS-72 | T | T | T | T | T | S | T | T | T | T | S | S | T | S | S | 50 |
| 6 | Acinetobacter calcoaceticus BS-27 | T | T | T | T | T | T | T | T | T | T | T | T | T | T | T | 100 |
| 7 | Pseudomonas putida BS-19 | T | T | T | T | T | T | T | T | T | T | T | T | T | T | T | 100 |
| 8 | Pseudomonas fluorescens FB-49 | T | T | T | T | T | T | T | T | T | T | T | T | T | T | T | 100 |
| 9 | Klebsiella michiganensis PS-2 | T | T | T | T | T | S | T | T | T | T | S | S | T | T | T | 70 |
| 10 | Serratia marcescens RS-65 | T | T | T | T | T | S | T | S | S | T | S | S | T | T | T | 50 |
| % (T) | 100 | 100 | 100 | 100 | 100 | 70 | 100 | 80 | 70 | 100 | 70 | 60 | 100 | 90 | 90 | ||
| % (S) | 0 | 0 | 0 | 0 | 30 | 0 | 20 | 30 | 0 | 30 | 40 | 0 | 10 | 10 | |||
T = tolerant and S = sensitive.