Table 3.
Biodegradation of isoproturon by Pseudoxanthomonas sp. at 30 °C and different pH
| Time (days) | pH 6.5 | pH 7.0 | pH 7.5 | |||
|---|---|---|---|---|---|---|
| Control | Treatment | Control | Treatment | Control | Treatment | |
| 5 | 4.71 ± 0.20 (2.36) | 27.78 ± 0.11 (13.89) | 8.04 ± 0.37 (4.0) | 35.34 ± 0.42 (17.67) | 6.82 ± 0.63 (3.41) | 30.01 ± 0.58 (15.01) |
| 10 | 8.40 ± 0.38 (4.2) | 48.14 ± 0.19 (24.07) | 13.34 ± 0.34 (6.67) | 59.70 ± 0.54 (29.85) | 10.21 ± 0.72 (5.11) | 52.14 ± 0.75 (26.07) |
| 15 | 11.65 ± 0.64 (5.83) | 115.04 ± 0.81 (57.52) | 19.88 ± 027 (9.94) | 134.67 ± 0.37 (67.34) | 15.60 ± 0.70 (7.80) | 121.62 ± 0.63 (60.81) |
| 20 | 17.02 ± 0.25 (9.0) | 153.13 ± 0.36 (76.57) | 22.02 ± 0.86 (11.51) | 165.73 ± 0.59 (82.87) | 18.70 ± 0.58 (9.35) | 154.89 ± 0.51 (77.45) |
| SEm± | CD at 5 % | SEm± | CD at 5 % | SEm± | CD at 5 % | |
|---|---|---|---|---|---|---|
| A (control)ns | 0.21 | 0.65 | 0.25 | 0.75 | 0.32 | 0.97 |
| B (treatment)** | 0.30 | 0.92 | 0.35 | 1.07 | 0.45 | 1.37 |
| A*B (interaction)** | 0.43 | 1.30 | 0.50 | 1.51 | 0.64 | 1.94 |
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