The occurrence and fate of hydroxylated polybrominated diphenyl ethers（OH-PBDEs） and methoxylated polybrominated diphenyl ethers（Me O-PBDEs） have received significant attention. However, there is limited informati...The occurrence and fate of hydroxylated polybrominated diphenyl ethers（OH-PBDEs） and methoxylated polybrominated diphenyl ethers（Me O-PBDEs） have received significant attention. However, there is limited information on the metabolism relationship between OH-pentaB DEs and MeO-pentaB DEs 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.展开更多
基金supported by the National Basic Research Program (973) of China (No. 2014CB441104)National Natural Science Foundation of China (Nos. 21520102009 and 21137003)the Zhejiang Provincial Natural Science Foundation of China (LY14B070009)
文摘The occurrence and fate of hydroxylated polybrominated diphenyl ethers（OH-PBDEs） and methoxylated polybrominated diphenyl ethers（Me O-PBDEs） have received significant attention. However, there is limited information on the metabolism relationship between OH-pentaB DEs and MeO-pentaB DEs 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.
