FIGURE 2.

Processes directly involved in rhizosphere mobilization, root uptake, root-to-shot transport and shoot utilization of essential (nutrients) and beneficial elements modulated by Si. Left (blue), nutrient deficiency; right (pink), excess of nutrients and beneficial elements; middle (blue/pink), nutrient deficiency or excess of nutrients and beneficial elements. General ameliorating effect of Si in stressed plants (e.g., increased tissue antioxidant capacity) may also improve overall plant performance thereby enhancing the above-mentioned processes.