Figure 3.

Effect of nitric oxide and salt stress on H₂O₂ content, lipid peroxidation, cell viability and caspase-like activity in maize roots. H₂O₂ content (A), lipid peroxidation (B), cell death (C) and caspase-like enzymatic activity (D) were measured in maize roots after 21 d of treatment that was initiated at the V1 stage of vegetative growth. Treatments were with nutrient solution (UNTREATED) or nutrient solution supplemented to contain a final concentration of either 10 µM DETA/NO, 10 µM DETA, 150 mM NaCl, 10 µM DETA/NO + 150 mM NaCl and 10 µM DETA + 150 mM NaCl. Bars represent the means ± SE of three independent experiments with two separate plants used for each experiment.