FIGURE 2.

Effects of different levels of alkaline stress with and without seed-priming with silicon (Si) on (A) Na⁺ content, (B) K⁺ content and (C) K⁺/Na⁺ ratio in 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. DW, dry weight.