Figure 3. Formation of sand soil mulch and biofilm on root hairs of winter wheat (cv. Stava) by Bacillus thuringiensis AZP2.

Scanning electron micrographs were made of AZP2-primed wheat root systems after 10-day drought stress and show sand mulch (A, B) and bacterial biofilm formation on root hair (C, D). Significantly more soil mulch is attached to the AZP2 treated plant (A, right) in comparison to control (A, left). Red circles indicate the areas magnified.