Figure 3.

The effect of salt and Si treatment on the Si content (A), Na⁺ concentrations (B), K⁺ concentrations (C) and K⁺/Na⁺ ratio (D) in alfalfa leaves. Four weeks-old alfalfa seedlings were exposed to 0, 50, 100, and 200 mM with (+2 mM Si) or without (−2 mM Si) Silicon for 14d. Leaves were sampled 14 d after conducting salt and Si treatment to determine the ion concentrations. Bars indicate standard deviation (SD) of the means (n = 4). Different letters denote significant differences among the treatments based on Duncan’s multiple range test (P < 0.05). DW, dry weight.