Table 2.
Thiobarbituric acid reactive substance content, GSH content, net photosynthesis, and plant dry mass of Varuna (high photosynthetic capacity) and RH30 (low photosynthetic capacity) cultivars of mustard (Brassica juncea L.) at 30 DAS.
| H2O2 concentration (μM) | ||||||||
|---|---|---|---|---|---|---|---|---|
|
Control |
25 |
50 |
100 |
|||||
| Parameters | Varuna | RH30 | Varuna | RH30 | Varuna | RH30 | Varuna | RH30 |
| TBARS content | 21 ± 1.1c | 25 ± 1.0b | 17 ± 0.85d | 22 ± 1.1c | 12 ± 0.68e | 18 ± 1d | 26 ± 1.3b | 32 ± 1.6a |
| GSH content | 286 ± 11d | 208 ± 10h | 342 ± 16c | 227 ± 11g | 389 ± 17b | 247 ± 12f | 412 ± 19a | 259 ± 13e |
| Net photosynthesis | 15.4 ± 0.8c | 10.4 ± 0.7g | 17.3 ± 0.8b | 11.3 ± 0.6f | 19.9 ± 1.1a | 12.2 ± 0.5e | 13.1 ± 0.7d | 7.2 ± 0.4h |
| Plant dry mass | 5.2 ± 0.27c | 3.4 ± 0.21g | 5.7 ± 0.28b | 3.8 ± 0.21f | 6.3 ± 0.34a | 4.1 ± 0.23e | 4.5 ± 0.24d | 2.7 ± 0.16h |
Plants were basally treated with 0, 25, 50, and 100 μM H2O2 mg at 15 days after seed germination. Data are presented as treatments mean ± SE (n = 4). Data followed by same letter are not significantly different by LSD test at P < 0.05.