Figure 3.
The effects of ND on APX (a), CAT (b), and POD (c) antioxidative enzyme activities in root of barley cultivars under different concentrations. The error bars (mean ± SE) followed by various letters are statistically significant (P < 0.05, Duncan’s Multiple Range Test). Significant differences between the two concentrations are marked with different letter. NC7:7 days after ND application; NC14: 14 days after ND application.