John Wiley & Sons, Ltd.

Combined effects of bisphenol A and cadmium on growth and nitrate assimilation of soybean seedling roots

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Bisphenol A (BPA) and cadmium (Cd) pollution exist simultaneously in many regions. However, little information is available regarding the combined effects of BPA and Cd pollution on plants. Plant roots are in direct contact with the soil, which is an important compartment of BPA and Cd. Here, the effects of combined BPA and Cd pollution on soybean seedling roots were evaluated in pot experiments. The combined treatment with BPA and Cd at the low concentrations (1.5 mg/kg BPA and 0.2 mg/kg Cd) improved soybean seedling root growth. However, the other combined BPA and Cd treatments, including the combined treatments with BPA (Cd) at the low concentration and Cd (BPA) at the high concentration, as well as the combined treatment with BPA and Cd at the high concentrations inhibited soybean seedling root growth. The improvement or inhibition of soybean seedling root growth was greater in the combined BPA and Cd treatments than in the single treatments. The effects of the combined BPA and Cd treatments on root growth resulted from changes in nitrate assimilation. In addition, the combined effects of BPA and Cd on the nitrate and ammonium contents in roots are also discussed. This research provides a basic understanding of the combined effects of BPA and Cd pollution on plant roots. Environ Toxicol Chem © 2014 SETAC

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