TABLE 6.
Effect of different levels of soil applied Cu (0, 30, or 60 mg kg–1) and/or MEL (30, 40, or 50 μM) on leaf peroxidase (units g–1 FM), catalase (mM H2O2 decomposed g–1 FM), superoxide dismutase (unit g–1 FM), glutathione (nmol g–1 FW), and proline (mg g–1 FM) content of Brassica juncea at 45 DAS.
| Treatments | Peroxidase | Catalase | Superoxide-dismutase | Glutathione | Proline |
| Control | 12.16 ± 0.23g | 424.13 ± 8.02f | 136 ± 2.57f | 380 ± 7.19g | 15.57 ± 0.29f |
| Cu (30 mg kg–1) | 13.65 ± 0.26ef | 452.50 ± 8.56e | 152 ± 2.87de | 402 ± 7.60f | 17.36 ± 0.33e |
| Cu (60 mg kg–1) | 14.68 ± 0.28d | 488.56 ± 9.24de | 163. ± 3.08c | 443 ± 8.38e | 18.95 ± 0.36cd |
| MEL (30 μM) | 14.21 ± 0.27g | 482.92 ± 9.13de | 158 ± 3.00d | 413 ± 7.81f | 17.12 ± 0.32e |
| MEL (40 μM) | 15.28 ± 0.29c | 554.52 ± 10.68a | 167 ± 3.16bc | 461 ± 8.72cd | 19.13 ± 0.36cd |
| MEL (50 μM) | 14.73 ± 0.28d | 527.28 ± 9.97bc | 160 ± 3.04cd | 439 ± 8.30e | 18.02 ± 0.34de |
| Cu (30) + MEL (30 μM) | 14.52 ± 0.27de | 506.00 ± 9.57d | 163 ± 3.08c | 434 ± 8.20e | 18.65 ± 0.35d |
| Cu (30) + MEL (40 μM) | 16.38 ± 0.31b | 533.19 ± 10.08b | 170 ± 3.22b | 497 ± 9.41b | 20.44 ± 0.39b |
| Cu (30) + MEL (50 μM) | 15.30 ± 0.29c | 522.05 ± 9.87c | 166 ± 3.14bc | 474 ± 8.97c | 19.87 ± 0.38bc |
| Cu (60) + MEL (30 μM) | 16.67 ± 0.32ab | 535.59 ± 10.13b | 166 ± 3.14bc | 472 ± 8.93c | 20.19 ± 0.38b |
| Cu (60) + MEL (40 μM) | 17.63 ± 0.33a | 556.33 ± 10.52a | 181 ± 3.44a | 520 ± 9.84a | 22.74 ± 0.43a |
| Cu (60) + MEL (50 μM) | 16.73 ± 0.32ab | 542.14 ± 10.25b | 173 ± 3.28b | 495 ± 9.37b | 21.00 ± 0.40b |
Data shows the mean ± standard error. Same letters indicate that there is no significant difference at P < 0.05.