Modulation in Growth, Yield, Water Relations, and Mineral Nutrients of Canola ( Brassica napus L.) by Foliar Application of Melatonin and Ascorbic Acid Under Salinity Stress

Salinity stress is a major abiotic factor that inhibits plant growth and yield. This study's objective was to evaluate how foliar applications of melatonin and ascorbic acid affected canola varieties under salt stress. The treatments of the study were as follows: canola varieties (a) (Oscar and Super), (b) melatonin (MT) and ascorbic acid (AsA) (control, 100 µM MT, 1 mM AsA, and 100 µM MT + 1 mM AsA), and (c) salt stress (0 mM NaCl, 75 mM NaCl, and 150 mM NaCl) levels were used. Under saline conditions, plant height was reduced by 27.8% in both varieties while the combined effect of MT and AsA improved the plant height up to 22.9% and 54.3% in Oscar and Super, respectively. Seed yield and biological yield…