FIG 4.

(A) Photographs illustrating the effects of three concentrations of trichothecene (EPT), trichodermol, and HA on the growth and root architecture of tomato plants. (B) qPCR analysis of the levels of expression of five tomato defense-related genes in the aerial parts of tomato plants grown under the effects of EPT (4 μg ml⁻¹), trichodermol (4 μg ml⁻¹), and HA (4 μg ml⁻¹) versus the levels of expression in control plants without any of these compounds. Comparative calculations and graphic representations were carried out as indicated in the legend to Fig. 3.