title: Could Uptake and Acropetal Translocation of PBDEs by Corn Be Enhanced Following Cu Exposure? Evidence from a Root Damage Experiment.
abstract: Cocontamination by heavy metals and persistent organic pollutants (POPs) is ubiquitous in the environment. Fate of POPs within soil/water-plant system is a significant concern and an area where much uncertainty still exists when plants suffered cotoxicity from POPs and metals. This study investigated the fate of polybrominated diphenyl ethers (PBDEs) when copper (Cu) was present within the soil/water-plant system using pot and hydroponic experiments. The presence of Cu was found to induce damage to the root cell membranes of corn (Zea mays L. cv. Nongda 108) with increasing concentration in both shoots and roots. The PBDE congeners BDE209 and BDE47 in shoots were also enhanced with the increasing electrolytic leakage from root, attributed to Cu damage, and the highest shoot BDE209 and BDE47 levels were observed under the highest Cu dosage. In addition, positive correlations were observed between the PBDE content of corn shoots and the electrolytic leakage of corn roots. These results indicated that within a defective root system, more PBDEs will penetrate the roots and are acropetally translocated in the shoots. The potential ecological risk associated with the translocation and accumulation of POPs into plant shoots needs careful reconsideration in media cocontaminated with metals and POPs, whereas often ignored or underestimated in environmental risk assessments.
authors.affiliation: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640, China.|Graduate University of Chinese Academy of Sciences , Beijing 100039, China.
authors.forename: Shaorui
authors.initials: S
authors.lastname: Wang
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology , Dalian 116024, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640, China.
authors.forename: Chunling
authors.initials: C
authors.lastname: Luo
authors.affiliation: College of Life Sciences, Nanjing Agricultural University , Nanjing 210095, China.
authors.forename: Longfei
authors.initials: L
authors.lastname: Jiang
authors.affiliation: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640, China.
authors.forename: Mengke
authors.initials: M
authors.lastname: Song
authors.affiliation: Lancaster university , Lancaster Environment Centre, Lancaster, LA1 4YW, United Kingdom.
authors.forename: Dayi
authors.initials: D
authors.lastname: Zhang
authors.affiliation: School of Environmental Science and Engineering, Guangdong University of Technology , Guangzhou 510006, China.
authors.forename: Yujie
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640, China.
authors.forename: Gan
authors.initials: G
authors.lastname: Zhang
mesh_terms: D003300:Copper / Q000378:metabolism / Q000633:toxicity*; D055768:Halogenated Diphenyl Ethers / Q000378:metabolism*; D010539:Permeability; D018517:Plant Roots / Q000187:drug effects / Q000378:metabolism*; D018520:Plant Shoots / Q000378:metabolism; D012987:Soil; D012989:Soil Pollutants / Q000378:metabolism*; D003313:Zea mays / Q000187:drug effects / Q000378:metabolism*
chemical_list: D055768:Halogenated Diphenyl Ethers; D012987:Soil; D012989:Soil Pollutants; D003300:Copper