FIGURE 7.

Microscope observation of amorphous silica cells and SiO₂ quantification. (A) SEM of the infested leaf surfaces (adaxial face) from susceptible Puitá INTA-CL and tolerant IRGA 423 cultivars, highlighting the amorphous silica cells. (B) Quantification of SiO₂ using SEM. Figures in (A) are representatives of 10 analyzed leaf surfaces from each cultivar. Represented values in (B) are the averages of 10 samples ± SE. Mean values with one asterisk are significantly different as determined by the Student’s t-test (P ≤ 0.05). DW, dry weight.