Rhizosphere soils of phytoremediator plants growing in Pb-contaminated landfill sites are natural reservoirs of indigenous arbuscular mycorrhizal fungi (AMF) and phosphate-solubilizing bacteria (PSB), which can enhance plant growth and phytoremediation. This study evaluated the combined effects of rhizosphere soils containing AMF (rhizomyco) from three phytoremediators (Calotropis gigantea, Jatropha gossypiifolia, and Senna alata) and PSB inoculation. The pot experiment was conducted using a 3×2 factorial in a completely randomized design with four replications. The primary parameters were C. gigantea stem-cutting biomass, Pb uptake, and AMF propagation potential. Data were analyzed using ANOVA, DMRT, and Pearson’s correlation analysis. S. alata rhizomyco resulted in the highest C. gigantea stem-cutting biomass growth and Pb uptake, despite exhibiting the lowest AMF propagation potential. In contrast, J. gossypiifolia rhizomyco showed the highest AMF propagation potential but produced the lowest plant biomass among the other rhizomyco sources, suggesting that AMF propagation potential does not necessarily reflect symbiotic effectiveness in promoting plant growth and Pb uptake. Meanwhile, PSB inoculation enhanced C. gigantea stem-cutting biomass and Pb uptake, while promoting Pb retention in roots and limiting its translocation to shoots, resulting in root BAF values >1 and TF values <1. These findings highlight the potential of selecting effective rhizomyco communities and combining them with PSB inoculation to improve the growth and Pb phytoremediation capacity of C. gigantea stem cuttings.
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