Higher levels of reactive species of oxygen are harmful to plant tissues. This study evaluated the action of different doses of thymol on soybean seed germination, biometric analysis and enzymatic parameters; both involved in germination process. High doses of thymol affected the plantlet growth, but not hampered the germination.
Keywords:
ascorbate peroxidase; catalase; superoxide dismutase; Glycine max L; seed vigor
| Dose (mg L-1) | Germination (%) | GSI | Shoot lenght (cm) | Root lenght (cm) | SOD (U min-¹ mg-¹ protein) |
|---|---|---|---|---|---|
| 0 | 88.5 (±2.5) | 22.35 (±0.54) | 8.47 (±0.21) | 12.77 (±1.38) | 1.44 (±0.22) |
| 0.01 | 86.5 (±1.5) | 21.56 (±0.48) | 6.66 (±0.23)* | 11.10 (±0.80) | 1.05 (±0.49)* |
| 0.1 | 87.5 (±1.7) | 21.96 (±0.50) | 7.96 (±0.66) | 11.80 (±0.72) | 0.75 (±0.11)* |
| 1 | 85.5 (±3.6) | 21.53 (±0.86) | 6.17 (±0.29)* | 10.86 (±0.40) | 2.07 (±0.43) |
| 10 | 85.5 (±1.3) | 21.34 (±0.28) | 2.60 (±0.14)* | 2.78 (±0.30)* | 0.22 (±0.06)* |
| 100 | 93.5 (±2.8) | 23.38 (±0.60) | 2.83 (±0.34)* | 4.07 (±0.27)* | 0.95 (±0.27)* |
