FIGURE 4.

Pearson correlation analysis among all the studied parameters across all the treatments and species against Cr (left side figure) and Pb (right side figure) concentrations. LC, Leaf count; PRL, plant root length; PSL, plant shoot length; PFW, plant fresh weight; PDW, plant dry weight; Chl content, chlorophyll content; MSI, membrane sustainability index; CO₂d, CO₂ assimilation rate; RHd, relative humidity; A, net photosynthetic rate; E, transpiration rate; Gs, is stomatal conductance; and Ci, is leaf internal CO₂ concentration.