title: Uptake, translocation and metabolism of decabromodiphenyl ether (BDE-209) in seven aquatic plants.
abstract: Terrestrial plant uptake of PBDEs from contaminated soils has been widely reported recently. In this study the fate of deca-BDE within a plant/PBDEs/aquatic environment system was investigated through simulated pot experiments. Accumulations of the total PBDEs and deca-BDE were observed in tissues of seven test aquatic plant species, namely Phragmites australis, Cyperus papyrus, Alternanthera philoxeroides, Colocasia esculenta, Scirpus validus, Acorus calamus and Oryza sativa. In all seven plants, O. sativa leads the uptake and accumulation both in the total PBDEs (444.8 ng g(-1)) and deca-BDE (368.0 ng g(-1)) in roots. Among the six common phytoremediation aquatic plants, A. calamus leads the uptake (236.2 ng g(-1)), and P. australis leads the translocation (Cshoot/Croot = 0.35), while A. philoxeroides (43.4%) and P. australis (80.0%) lead in the metabolism efficiencies in the root and shoot, respectively. The detection of seventeen lesser brominated PBDE congeners provided the debromination evidence, and the specific PBDEs profiles in test plant species indicated there is no common metabolic pattern. Furthermore, a relative high proportion of lesser brominated PBDE congeners in shoots suggested the possible metabolic difference between roots and shoots. Finally, a noticeable percentage of penta- and octa-BDE derived from deca-BDE also hint the ecological risk in deca-BDE use. This comparative research on the aquatic plants provide a broad vision on the understanding of plant/PBDEs/aquatic environment interaction system, and may be applied to remediate PBDEs in contaminated waters and sediments.
authors.affiliation: Guangdong Institute of Microbiology, Guangzhou 510070, China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou 510070, China. Electronic address: dengdaiyong@hotmail.com.
authors.forename: Daiyong
authors.initials: D
authors.lastname: Deng
authors.affiliation: Guangdong Institute of Microbiology, Guangzhou 510070, China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou 510070, China; South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; University of Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Jin
authors.initials: J
authors.lastname: Liu
authors.affiliation: Guangdong Institute of Microbiology, Guangzhou 510070, China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou 510070, China.
authors.forename: Meiying
authors.initials: M
authors.lastname: Xu
authors.affiliation: Department of Agriculture and Environmental Sciences, Cooperative Research Programs, Lincoln University in Missouri, Jefferson City, MO 65101, USA.
authors.forename: Guolu
authors.initials: G
authors.lastname: Zheng
authors.affiliation: Guangdong Institute of Microbiology, Guangzhou 510070, China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou 510070, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Guo
authors.affiliation: Guangdong Institute of Microbiology, Guangzhou 510070, China; State Key Laboratory of Applied Microbiology Southern China, Guangzhou 510070, China.
authors.forename: Guoping
authors.initials: G
authors.lastname: Sun
mesh_terms: D055768:Halogenated Diphenyl Ethers / Q000493:pharmacokinetics*; D010944:Plants / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics*
chemical_list: D055768:Halogenated Diphenyl Ethers; D014874:Water Pollutants, Chemical; C010902:decabromobiphenyl ether
keywords: Deca-BDE; Fresh water; PBDEs; Phytoremediation; Sediment