Phytoremediation is a strategy to employ plants to recover high quantities of metals in the soil into the harvestable parts, such as shoots and roots. High levels of Cd and lead (Pb) in the soil cause several stress symptoms in plants, including a decrease in growth, reduced root growth, and carbohydrate metabolism. In this study, Saravan and HGS-867 as local landrace and Indian guar variety were selected to investigate the effect of the application of Pb (0, 40, 150, and 200 mg/l) and the cadmium (0, 25, 50, and 100 mg/l) on phonological, yield parameters and phytoremediation assessment. The results showed that Pb translocation factor (TF) was significant in Pb×Cd and Pb×Cd×G (genotype) treatments at 1% and in Pb×G at 5%. Pb bioconcentration factor (BCF) was significant in all treatments except Cd and Cd×G at 1%. Mean comparison of the data showed that the number of flowers, leaves, and clusters in plant decreased significantly with increasing Pb content. With increasing Cd concentration, the number of branches, height, the number of seeds, clusters, and leaves for each plant decreased significantly at the level of 1%. The maximum TF was observed in Pb at 40 mg/l in the HG-867 variety. Also, the Saravan landrace in Cd (100 mg/l) showed the highest amount of BCF (Cd). With increasing the concentrations of Pb and Cd, the gum percentage decreased significantly. The results of Pearson's correlation analysis indicated that plant height, number of pods/plant, root length, biomass, and pod length had a positive correlation with seed yield and a negative correlation with TF (Pb) and BCF (Pb). The results suggest that according to TF, BCF, and BAC, C. tetragonoloba L. can be effectively used as a good accumulator.
