Figure 2.

Influence of Si supply on total magnesium (Mg) and silicon (Si) content of maize plants subjected to Mg deficiency. (A) total Mg content in roots; (B) total Mg content in shoots; (C) total Si content in roots and (D) total Si content in shoots of maize. Plants were grown in hydroponic culture under low Mg (0.02 mM) or normal Mg (0.5 mM) supply and two concentrations of Si (1.5 and 3 mM). Si provided in the second week of plant growth in hydroponic culture when Mg deficiency was applied. 21-days old plants were harvested 14 days after imposition of Mg deficiency. The white and black bars represent Mg-sufficient and Mg-deficient plants, respectively. Bars indicate means ± SE. Different letters denote significant differences according to LSD test (p < 0.05; n = 4).