Sun Zhaoguo, Wang Lihong, Wang Qingqing, Zhou Qing, Huang Xiaohua
State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China; School of Environmental and Civil Engineering, Jiangnan University, Wuxi, China.
Environ Toxicol Chem. 2014 Sep;33(9):2013-9. doi: 10.1002/etc.2647. Epub 2014 Jul 30.
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. In the present study, the effects of combined BPA and Cd pollution on soybean seedling roots were evaluated in pot experiments. Combined treatment with BPA and Cd at low concentrations (1.5 mg/kg BPA and 0.2 mg/kg Cd) improved soybean seedling root growth. However, other combined BPA and Cd treatments, including combined treatment with BPA (Cd) at the low concentration and Cd (BPA) at the high concentration as well as combined treatment with BPA and Cd at the high concentration, 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 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 discussed. The present research provides a basic understanding of the combined effects of BPA and Cd pollution on plant roots.
双酚A（BPA）和镉（Cd）污染在许多地区同时存在。然而，关于BPA和Cd污染对植物的联合影响的信息却很少。植物根系直接与土壤接触，而土壤是BPA和Cd的一个重要储存库。在本研究中，通过盆栽试验评估了BPA和Cd联合污染对大豆幼苗根系的影响。低浓度（1.5毫克/千克BPA和0.2毫克/千克Cd）的BPA和Cd联合处理促进了大豆幼苗根系生长。然而，其他BPA和Cd联合处理，包括低浓度BPA（Cd）与高浓度Cd（BPA）的联合处理以及高浓度BPA和Cd的联合处理，均抑制了大豆幼苗根系生长。BPA和Cd联合处理对大豆幼苗根系生长的促进或抑制作用比单一处理更为显著。BPA和Cd联合处理对根系生长的影响源于硝酸盐同化作用的变化。此外，还讨论了BPA和Cd对根系中硝酸盐和铵含量的联合影响。本研究为理解BPA和Cd污染对植物根系的联合影响提供了基础认识。
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