FIGURE 3.
Effects of different levels of alkaline stress with and without seed-priming with silicon (Si) on (A) the content of malondialdehyde (MDA) and the activities of (B) superoxide dismutase (SOD), (C) catalase (CAT) and (D) peroxidase (POD) in leaves of 25-day-old maize plants. Bars represent standard deviation (SD) of the means (n = 3). Different letters indicate significant differences among the treatments at P < 0.05, according to Duncan’s multiple range test. FW, fresh weight.