Table 2.
Biodegradation of isoproturon by Pseudoxanthomonas sp. at 25 °C and different pH
| Time (days) | pH 6.5 | pH 7.0 | pH 7.5 | |||
|---|---|---|---|---|---|---|
| Control | Treatment | Control | Treatment | Control | Treatment | |
| 5 | 3.71 ± 0.20 (1.86) | 13.16 ± 0.25 (6.58) | 6.00 ± 0.38 (3.0) | 21.08 ± 0.28 (10.54) | 4.48 ± 0.30 (2.24) | 17.93 ± 0.53 (8.97) |
| 10 | 6.07 ± 0.26 (3.04) | 46.57 ± 0.60 (23.29) | 11.01 ± 0.44 (5.51) | 61.28 ± 0.68 (30.64) | 7.21 ± 0.17 (3.61) | 55.17 ± 0.46 (27.59) |
| 15 | 9.31 ± 0.34 (4.66) | 97.72 ± 1.14 (48.86) | 18.21 ± 0.28 (9.11) | 118.78 ± 0.35 (59.39) | 11.93 ± 0.47 (5.97) | 113.19 ± 0.59 (56.6) |
| 20 | 16.00 ± 0.25 (8.0) | 139.34 ± 0.20 (69.67) | 20.02 ± 0.73 (11.01) | 146.68 ± 0.60 (73.34) | 17.70 ± 0.52 (8.85) | 143.19 ± 0.37 (71.6) |
| SEm± | CD at 5 % | SEm± | CD at 5 % | SEm± | CD at 5 % | |
|---|---|---|---|---|---|---|
| A (control)ns | 0.25 | 0.76 | 0.25 | 0.75 | 0.22 | 0.67 |
| B (treatment)** | 0.35 | 1.07 | 0.35 | 1.06 | 0.31 | 0.95 |
| A*B (interaction)** | 0.50 | 1.52 | 0.51 | 1.50 | 0.44 | 1.35 |
Values are degraded amount of IUP in mg l−1, initial IPU concentration = 200 mg l−1, ± SE, n = 3
Values in parenthesis represent % IPU degradation
Control: uninoculated, Treatment: inoculated with Pseudoxanthomonas sp.
** Significantly different from the control at p < 0.05