Fig. 6

SEM images of the ultrastructure of stomata in the epidermis of S. abrotanoides leaves in normal (A, B) and limited water supply treatments without CNPs (E, F) or with CNPs supplementation for normal (C, D) and limited water (G, H) at 90 ppm CNPs. Chitosan nanoparticles (CNPs), Field capacity (FC). The micrographs were scaled at 2 M (B, D, F, and H) and 20 M (A, C, E, and G), respectively