Fig. 1From: The role of melatonin on caspase-3-like activity and expression of the genes involved in programmed cell death (PCD) induced by in vitro salt stress in alfalfa (Medicago sativa L.) rootsEffects of melatonin (0, 0.1, 10, and 15 µM) and NaCl (150 and 200 mM) on H2O2 (A), \({\text{O}}_{2}^{ - }\) (B) and ROS (C) content of alfalfa root. Data was collected after ten days of treatment with salt and melatonin. Data represents the mean of replicates ± SD and uncommon letters indicate significant differences based on Duncan's multiple range test (P < 0.05)Back to article page