Table 4.
Nitrogen (N) content (mg g−1 DW), nitrate reductase (NR) activity (nmol (NO2) g−1FW h−1), activity of 1-aminocyclopropane carboxylic acid (ACC) (ACS; μg ACC m−2 s−1) and ethylene evolution (μl m−2 s−1) in mustard (Brassica juncea L.) cv Pusa Jai Kisan at 30 DAS. Plants were treated either with 5 mM N, 10 mM N, 200 µl l−1 ethephon in different combinations and grown with or without 100 mM NaCl. Data means with the same letter are not different significantly at P < 0.05. DW, dry weight; FW, fresh weight.
| Treatments | N content | NR activity | ACS activity | Ethylene evolution |
|---|---|---|---|---|
| Control | 23.3 ± 1.23h | 353 ± 13.8f | 66.0 ± 3.67e | 35.0 ± 1.7e |
| 5 mM N (N5) | 29.1 ± 1.57 g | 376 ± 17.7e | 55.3 ± 3.48f | 30.6 ± 1.34f |
| 10 mM N (N10) | 46.5 ± 1.73c | 458 ± 20.2c | 43.7 ± 3.27h | 23.5 ± 1.03h |
| 100 mM NaCl | 19.2 ± 0.9j | 261 ± 12.1h | 199.0 ± 6.6a | 65.0 ± 3.74a |
| 200 µl l−1 ethephon (E) | 41.0 ± 1.77d | 432 ± 22.3d | 74.0 ± 4.86c | 41.1 ± 3.28c |
| N5 + NaCl | 20.6 ± 1.16i | 296 ± 14.2 g | 79.4 ± 5.2b | 46.0 ± 3.3b |
| N10 + NaCl | 30.7 ± 1.37f | 369 ± 13.3f | 64.6 ± 3.3e | 34.5 ± 1.82e |
| NaCl + E | 31.2 ± 1.42f | 375 ± 14.6f | 65.3 ± 3.38e | 36.4 ± 1.94e |
| N5 + E | 56.7 ± 2.3b | 507 ± 24.1b | 69.3 ± 4.38d | 38.4 ± 2.28d |
| N10 + E | 61.4 ± 2.41a | 539 ± 28.2a | 53.0 ± 4.22 g | 27.8 ± 1.44 g |
| N5 + NaCl + E | 37.3 ± 1.6e | 443 ± 17.3d | 56.1 ± 3.54f | 29.5 ± 1.33f |
| N10 + NaCl + E | 47.0 ± 1.83c | 464 ± 19.9c | 44.9 ± 3.35h | 24.6 ± 1.24h |