title: Dechlorination and chlorine rearrangement of 1,2,5,5,6,9,10-heptachlorodecane mediated by the whole pumpkin seedlings.
abstract: Short chain chlorinated paraffins (SCCPs) are ubiquitously present as persistent organic pollutants in the environment. However, little information on the interaction of SCCPs with plants is currently available. In this work, young pumpkin plants (Cucurbita maxima × C. Moschata) were hydroponically exposed to the congener of chlorinated decane, 1,2,5,5,6,9,10-heptachlorodecane (1,2,5,5,6,9,10-HepCD), to investigate the uptake, translocation and transformation of chlorinated decanes in the intact plants. It was found that parent HepCD was taken up by the pumpkin roots, translocated from root to shoots, and phytovolatilized from pumpkin plants to air via the plant transpiration flux. Our data suggested that dechlorination of 1,2,5,5,6,9,10-HepCD to lower chlorinated decanes and rearrangement of chlorine atoms in the molecule were all mediated by the whole pumpkin seedlings. Chlorinated decanes were found in the shoots and roots of blank controls, indicating that chlorinated decanes in the air could be absorbed by leaves and translocated from shoots to roots. Lower chlorinated congeners (C10H17Cl5) tended to detain in air compared to higher chlorinated congeners (C10H16Cl6and other C10H15Cl7). Potential transformation pathway and behavior of 1,2,5,5,6,9,10-HepCD in pumpkin were proposed based on these experiments.
authors.affiliation: School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China.
authors.forename: Yanlin
authors.initials: Y
authors.lastname: Li
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Xingwang
authors.initials: X
authors.lastname: Hou
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Miao
authors.initials: M
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Qunfang
authors.initials: Q
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China. Electronic address: liujy@rcees.ac.cn.
authors.forename: Jiyan
authors.initials: J
authors.lastname: Liu
authors.affiliation: Department of Civil and Environmental Engineering, University of Iowa, Iowa City, IA, USA.
authors.forename: Jerald L
authors.initials: JL
authors.lastname: Schnoor
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Guibin
authors.initials: G
authors.lastname: Jiang
mesh_terms: D001711:Biotransformation; D028464:Cucurbita / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism*; D004784:Environmental Monitoring / Q000379:methods*; D054879:Halogenation; D006843:Hydrocarbons, Chlorinated / Q000737:chemistry / Q000378:metabolism*; D018527:Hydroponics; D010232:Paraffin / Q000737:chemistry / Q000378:metabolism; D018517:Plant Roots / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism; D036226:Seedlings / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism*; D012639:Seeds / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism; D012989:Soil Pollutants / Q000737:chemistry / Q000378:metabolism*
chemical_list: C000619518:1,2,5,5,6,9,10-heptachlorodecane; D006843:Hydrocarbons, Chlorinated; D012989:Soil Pollutants; D010232:Paraffin