Pan Lili, Sun Jianteng, Wu Xiaodan, Wei Zi, Zhu Lizhong
Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China.
Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China.
J Environ Sci (China). 2016 Nov;49:197-202. doi: 10.1016/j.jes.2016.06.017. Epub 2016 Jul 16.
The occurrence and fate of hydroxylated polybrominated diphenyl ethers (OH-PBDEs) and methoxylated polybrominated diphenyl ethers (MeO-PBDEs) have received significant attention. However, there is limited information on the metabolism relationship between OH-pentaBDEs and MeO-pentaBDEs that were frequently detected with relatively high concentrations in the environment. In this study, the biotransformation between OH-BDE-99 and MeO-BDE-99 was investigated in rice, wheat, and soybean plants. All the three plants can metabolize OH-BDE-99 to corresponding homologous methoxylated metabolites, while the transformation from MeO-BDE-99 to OH-BDE-99 could only be found in soybean. The conversion of parent compounds was the highest in soybean, followed by wheat and rice. Transformation products were found mainly in the roots, with few metabolites being translocated to the shoots and solution after exposure. The results of this study provide valuable information for a better understanding of the accumulation and transformation of OH-PBDEs and MeO-PBDEs in different plants.
羟基多溴二苯醚（OH-PBDEs）和甲氧基多溴二苯醚（MeO-PBDEs）的发生与归宿已受到广泛关注。然而，对于在环境中经常被检测到且浓度相对较高的OH-五溴二苯醚和MeO-五溴二苯醚之间的代谢关系，相关信息却很有限。在本研究中，对水稻、小麦和大豆植株中OH-BDE-99与MeO-BDE-99之间的生物转化进行了研究。这三种植物都能将OH-BDE-99代谢为相应的同系甲氧基化代谢产物，而从MeO-BDE-99到OH-BDE-99的转化仅在大豆中被发现。母体化合物的转化率在大豆中最高，其次是小麦和水稻。转化产物主要存在于根部，暴露后很少有代谢产物转运到地上部分和溶液中。本研究结果为更好地理解OH-PBDEs和MeO-PBDEs在不同植物中的积累与转化提供了有价值的信息。
