Figure 4.

Photosyntheti-nitrogen use efficiency (NUE) in mustard (Brassica juncea L.) cv Pusa Jai Kisan at 30 DAS. Plants were grown with 100 mM NaCl (S) or 10 mM N plus 200 µl l⁻¹ ethephon (10 N + 200E) individually or in combination, and the plants grown with 10 N + 200 E alone or with NaCl (S) were treated with 100 µM norbornadiene (NBD). Data represent mean values ± SE (n = 4). Means denoted by the same letter are not significantly different at P < 0.05.