Effect of copper on in vivo fate of BDE-209 in pumpkin

• Published in: Journal of hazardous materials Vol. 262; pp. 311 - 317
• Main Authors: Lu, Mang, Zhang, Zhong-Zhi, Su, Xiao-Li, Xu, Yu-Xin, Wu, Xue-Jiao, Zhang, Min
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.11.2013; Elsevier
• Subjects: Applied sciences; Copper - chemistry; Cucurbita - metabolism; Debromination; Enzyme; Exact sciences and technology; Halogenated Diphenyl Ethers - pharmacokinetics; MeO-PBDEs; Mineralization; OH-PBDEs; Pollution; Debromination; OH-PBDEs; MeO-PBDEs; Enzyme; Mineralization; Translocation; Dehalogenation; Metabolite; Flame retardant; Volatile organic compound; Plant leaf; Low volatile compound; Metabolism; Uptake; Heavy metal; Persistent organic pollutant; Degradation product; Organic compounds
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2013.08.067

•The effect of copper ions on BDE-209 debromination was investigated.•BDE-209 metabolism occurred preferentially in roots than in stems and leaves.•No in vivo mineralization of BDE-209 was detected in the plants. A 60-day growth chamber experiments were performed to investigate the effect of Cu stress on the uptake, translocation and metabolism of decabromodiphenyl ether (BDE-209) by pumpkin. A total of nine debrominated metabolites (de-PBDEs), two hydroxylated PBDEs (OH-PBDEs) and one methoxylated PBDEs (MeO-PBDEs) were detected in the tested plants. Concentrations of the total debrominated, hydroxylated or methoxylated metabolites generally followed the order of roots>stems>leaves, and de-PBDEs>OH-PBDEs>MeO-PBDEs. These results indicate that metabolism occurred preferentially in roots than in stems and leaves. The addition of moderate dosage of Cu (50mg/kg) resulted in increment in OH-PBDE concentrations in plant tissues, whereas higher concentrations of Cu could inhibit uptake and metabolism of BDE-209. No in vivo mineralization of BDE-209 was detected in the plants. These results provide valuable information about the behavior of BDE-209 in plant tissues under heavy metal exposure.