Table 2.
Changes in GSH- and NADPH-based redox status in the leaves of Brassica napus 14 days after drought imposition.
| GSH | GSSG | GSH/GSSG | NADPH | NADP+ | NADPH/NADP+ | ||
|---|---|---|---|---|---|---|---|
| Day | Treatment | (nmol g−1 FW) | (nmol g−1 FW) | Ratio | (nmol g−1 FW) | (nmol g−1 FW) | Ratio |
| 0 | Control | 582 ± 35 | 44.3 ± 3.7 | 13.2 ± 0.7 | 3.2 ± 0.3 | 6.0 ± 0.4 | 0.53 ± 0.04 |
| Drought | 582 ± 35 | 44.3 ± 3.7 | 13.2 ± 0.7 | 3.2 ± 0.3 | 6.0 ± 0.4 | 0.53 ± 0.04 | |
| 2 | Control | 560 ± 46 | 45.5 ± 5.7 | 12.4 ± 0.6 | 3.7 ± 0.3 | 7.1 ± 0.6 | 0.53 ± 0.04 |
| Drought | 697 ± 37 * | 50.4 ± 4.3 | 13.9 ± 0.5 * | 5.0 ± 0.4 * | 6.9 ± 0.5 | 0.73 ± 0.09 * | |
| 4 | Control | 620 ± 58 | 48.1 ± 4.6 | 12.9 ± 0.8 | 3.3 ± 0.4 | 6.5 ± 0.4 | 0.51 ± 0.07 |
| Drought | 741 ± 42 * | 63.3 ± 5.2 * | 11.7 ± 0.4 | 4.9 ± 0.3 ** | 7.3 ± 0.4 | 0.67 ± 0.07 | |
| 10 | Control | 575 ± 30 | 51.2 ± 4.8 | 11.3 ± 0.5 | 3.6 ± 0.4 | 5.6 ± 0.5 | 0.65 ± 0.11 |
| Drought | 392 ± 28 ** | 78.2 ± 5.9 ** | 5.1 ± 0.7 *** | 3.0 ± 0.4 | 9.2 ± 0.8 ** | 0.33 ± 0.02 ** | |
| 14 | Control | 606 ± 48 | 51.8 ± 4.9 | 11.7 ± 0.7 | 3.9 ± 0.3 | 5.4 ± 0.3 | 0.73 ± 0.08 |
| Drought | 363 ± 33 ** | 81.4 ± 6.2 ** | 4.5 ± 0.6 *** | 3.8 ± 0.3 | 10.3 ± 0.7 *** | 0.37 ± 0.04 ** |
Data are represented as means ± S.E. for n = 4. Asterisks indicate significant difference between well-watered and drought-stressed plants at each harvest day: * p < 0.05, ** p < 0.01, *** p < 0.001.