Fig. 3From: 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.) rootsDNA degradation in salt-stressed alfalfa root meristem. Arrows indicate smear and DNA Laddering (A). Inhibition of DNA laddering after treatment with melatonin (0.1, 10 and 15 µM) under 150 and 300 mM NaCl (B)Back to article page