Figure 4.
Effects of silicon (Si, 1 mM) on K+ concentration (a) and total K+ uptake (b) of sorghum plants grown under control (3 mM KCl)and low K (0.05 mM KCl) conditions. All parameters were measured after 15 days of treatment. Values are presented as the mean ± SE (n = 3). Different letters in one measure indicate statistically significant differences at P < 0.05.