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.
J Hazard Mater. 2013 Nov 15;262:311-7. doi: 10.1016/j.jhazmat.2013.08.067. Epub 2013 Sep 1.
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.
进行了为期 60 天的生长箱实验，以研究铜胁迫对南瓜吸收、迁移和代谢十溴二苯醚（BDE-209）的影响。在测试的植物中检测到了总共 9 种脱溴代谢物（de-PBDEs）、2 种羟基化 PBDEs（OH-PBDEs）和 1 种甲氧基化 PBDEs（MeO-PBDEs）。总脱溴、羟基化或甲氧基化代谢物的浓度通常遵循根>茎>叶的顺序，并且 de-PBDEs>OH-PBDEs>MeO-PBDEs。这些结果表明代谢优先发生在根部而不是茎和叶中。适量添加铜（50mg/kg）会导致植物组织中 OH-PBDE 浓度增加，而较高浓度的铜会抑制 BDE-209 的吸收和代谢。在植物中未检测到 BDE-209 的体内矿化。这些结果提供了有关重金属暴露下 BDE-209 在植物组织中行为的有价值信息。
