Table 1.
Interactive effect of various doses of soil applied biochar and peatmoss on the antioxidant enzymatic activities of tobacco grown under drought stressed conditions
| Treatments | SOD (U g− 1) | POD (U g− 1) | CAT (U g− 1) | APX (U g− 1) | ||
|---|---|---|---|---|---|---|
| Control | PM (-) | BC0 | 518.77 ± 9.67 e | 17088.89 ± 682.20 cd | 522.10 ± 7.45 ef | 0.41 ± 0.01 c |
| BC1 | 490.52 ± 16.37 ef | 16893.96 ± 253.16 cd | 497.30 ± 10.74 fg | 0.38 ± 0.01 c | ||
| BC2 | 462.47 ± 8.99 f | 15727.43 ± 439.91 d | 460.55 ± 13.52 g | 0.29 ± 0.02 d | ||
| PM (+) | BC0 | 412.74 ± 13.88 g | 13693.00 ± 915.37 e | 389.53 ± 12.57 h | 0.21 ± 0.02 e | |
| BC1 | 393.24 ± 14.82 gh | 11579.41 ± 744.75 f | 369.20 ± 13.74 hi | 0.18 ± 0.01 ef | ||
| BC2 | 345.66 ± 13.76 h | 10038.17 ± 736.64 f | 333.75 ± 15.13 i | 0.14 ± 0.02 f | ||
| Drought Stress | PM (-) | BC0 | 873.72 ± 12.24 a | 25521.19 ± 276.34 a | 797.97 ± 10.98 a | 0.53 ± 0.01 a |
| BC1 | 832.69 ± 14.17 ab | 24862.58 ± 408.91 a | 769.93 ± 8.37 ab | 0.49 ± 0.01 ab | ||
| BC2 | 817.04 ± 15.07 b | 23951.10 ± 392.25 a | 726.87 ± 13.93 a | 0.46 ± 0.01 b | ||
| PM (+) | BC0 | 688.93 ± 6.11 c | 19794.69 ± 405.01b | 614.53 ± 16.43 c | 0.38 ± 0.01 c | |
| BC1 | 646.29 ± 11.33 cd | 19144.57 ± 332.32 b | 583.08 ± 14.86 cd | 0.33 ± 0.02 d | ||
| BC2 | 626.17 ± 16.92 d | 17959.13 ± 228.56 bc | 551.61 ± 10.27 de | 0.29 ± 0.02 d | ||
For each parameter, bars with the same letter are not significantly different across treatment means (p ≤ 0.05) based on a Tukey’s-HSD test. Capped lines denote the standard deviation of three replicates. PM (+); with peatmoss; PM (-); without peatmoss; BC0 = no biochar; BC1 = 150 mg kg− 1; BC2 = 300 mg kg− 1