Table 5.
Activity of superoxide dismutase (SOD), peroxidase dismutase (POD), and the formation of malondialdehyde (MDA) under varying moisture regimes, genotypes, and foliar-applied plant hormones in dry-seeded rice.
| Plant Hormones | Soil Moisture Tension Regimes | |||
|---|---|---|---|---|
| 10 kPa | 20 kPa | |||
| Genotypes | ||||
| PR-111 | PR-123 | PR-111 | PR-123 | |
| Activity of SOD (U per mg of protein) | ||||
| GA3 (40 mg kg−1) | 3.71 | 4.33 | 5.52 | 4.75 |
| ABA (20 mg kg−1) | 4.87 | 6.16 | 5.68 | 5.71 |
| CK (40 mg kg−1) | 3.75 | 4.31 | 3.54 | 4.21 |
| Water spray (control) | 3.52 | 4.20 | 2.63 | 2.40 |
| LSD0.05 | 0.62 | |||
| Activity of POD (µ moles per minute per gram of fw) | ||||
| GA3 (40 mg kg−1) | 5.62 | 6.50 | 6.03 | 5.99 |
| ABA (20 mg kg−1) | 5.10 | 5.12 | 7.73 | 6.81 |
| CK (40 mg kg−1) | 5.03 | 6.79 | 7.08 | 5.35 |
| Water spray (control) | 3.92 | 4.45 | 4.98 | 5.01 |
| LSD0.05 | 0.36 | |||
| MDA production in flag leaf (mg per g of fw) | ||||
| GA3 (40 mg kg−1) | 7.60 | 9.70 | 7.20 | 6.90 |
| ABA (20 mg kg−1) | 5.70 | 8.40 | 5.80 | 6.00 |
| CK (40 mg kg−1) | 9.90 | 12.1 | 11.80 | 6.00 |
| Water spray (control) | 15.2 | 14.5 | 15.4 | 10.9 |
| LSD0.05 | 1.05 | |||
LSD, least significant differences; GA3, gibberellic acid; CK, cytokinin; and ABA, abscisic acid.