Abstract
Plant growth-promoting rhizobacteria (PGPR) play an important role in the biodegradation of natural and xenobiotic organic compounds in soil. They can also alter heavy metal bioavailability and contribute to phytoremediation in the presence or absence of synthetic metal chelating agents. In this study, the inhibitory effect of Cd 2+ and Ni 2+ at different concentrations of Ca 2+ and Mg 2+ , and the influence of the widely used chelator EDTA on growth of the PGPR Pseudomonas brassicacearum in a mineral salt medium with a mixture of four main plant exudates (glucose, fructose, citrate, succinate) was investigated. Therefore, the bacteriostatic effect of Cd 2+ ,N i 2+ and EDTA on the maximum specific growth rate and the determination of EC50 values was used to quantify inhibitoryimpact.Athigh concentrations
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