Fig. 2From: 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 and salt pretreatment on root viability in alfalfa roots. 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