Figure 1.

Influence of Si supply on roots and shoots biomass as well as chlorophyll level of maize plants subjected to Mg deficiency. (A) shoot fresh weights; (B) root fresh weights and (C) chlorophyll level measured by dualex device. 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).