title: Effect of copper on in vivo fate of BDE-209 in pumpkin.
abstract: 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.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China; School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi Province, China.
authors.forename: Mang
authors.initials: M
authors.lastname: Lu
authors.forename: Zhong-Zhi
authors.initials: ZZ
authors.lastname: Zhang
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Su
authors.forename: Yu-Xin
authors.initials: YX
authors.lastname: Xu
authors.forename: Xue-Jiao
authors.initials: XJ
authors.lastname: Wu
authors.forename: Min
authors.initials: M
authors.lastname: Zhang
mesh_terms: D003300:Copper / Q000737:chemistry*; D028464:Cucurbita / Q000378:metabolism*; D055768:Halogenated Diphenyl Ethers / Q000493:pharmacokinetics*
chemical_list: D055768:Halogenated Diphenyl Ethers; D003300:Copper; C010902:decabromobiphenyl ether
keywords: Debromination; Enzyme; MeO-PBDEs; Mineralization; OH-PBDEs