Fig. 4

The effects of IFQA on the contents of H₂O₂ and MDA in maize roots under H₂O₂ treatment. DAB staining (a) of maize roots, which were cultured in water for two days after germination and then transferred into H₂O, 50 mg/L IFQA, 1 mM H₂O₂, 1 mM H₂O₂ + 50 mg/L IFQA, 5 mM H₂O₂, and 5 mM H₂O₂ + 50 mg/L IFQA for 3 days; The contents of H₂O₂ (b) and MDA (c) in maize roots, which were cultured in water for two days after germination and then transferred into H₂O, 50 mg/L IFQA, 1 mM H₂O₂, and 1 mM H₂O₂ + 50 mg/L IFQA for three days, respectively. Letters above the boxes indicate statistically significant differences between samples (P < 0.05)