Fig. 3.
Effect of plant growth regulators (PGRs); gibberellic acid (GA3), triacontanol (Tria) or salicylic acid (SA) on two different cultivars of menthol mint grown with or without cadmium (Cd) on (A) net photosynthetic rate (PN), (B) stomatal conductance (gs), (C) internal carbon dioxide concentration (Ci) and, (D) Rubisco activity. Data are presented as treatments mean ± SE (n = 5). The bar shows standard error and different capital and small letters represent significant differences in Kushal and Kosi cultivars among various treatments by DMRT test at P ≤ 0.05