有机磷酸酯类(OPEs)的植物吸收、传输及代谢
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- 英文论文题名：Plant uptake,translocation and biotransformation of OPEs
- 论文作者：万位宁 ; 张淑贞
- 英文论文作者：Weining Wan ; Shuzhen Zhang ; Research Center for Eco-Environmental Sciences ; Chinese Academy of Sciences
- 年：2016
- 作者机构：中国科学院生态环境研究中心;
- 论文关键词：有机磷酸酯 ; 植物吸收 ; 代谢
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十六分会：环境化学
- 语种：中文
- 分类号：X503.23;Q945
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十六分会 ; 环境化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：182k
- 原文格式：D
- 会议级别：全国
摘要
有机磷酸酯(OPEs)作为溴代阻燃剂的替代品已广泛应用于各行业[1],并在多种环境介质及生物体中检出[2],但目前关于OPEs的植物累积与转化研究尚未见报道。本研究选取小麦作为模式植物,以TCEP、TDCPP、TBEP和EHDPP为代表化合物,通过水培暴露实验研究了OPEs的植物吸收、传输和代谢。研究结果表明:暴露10 d后,小麦对TCEP、TBEP、TDCPP和EHDPP存在显著的吸收、传输和累积,根富集因子依次为EHDPP>TBEP>TDCPP>TCEP,而茎向传输因子大小为TCEP>TBEP>TDCPP>EHDPP。在小麦根部及茎叶中均检测到OPEs代谢产物,主要为母体化合物脱去一个取代基生成的二磷酸酯,代谢产物在根中的累积量远高于茎叶中,且非卤代OPEs较之卤代OPEs更易发生代谢。本研究的结果为更好地理解OPEs在植物中的行为提供了有用的信息。
Plant uptake and accumulation are the significant steps in the transfer of contaminants into the food chain as well as an important process in their global cycling.Nevertheless,there has been no research addressing plant uptake of organophosphate esters(OPEs).A detailed investigation on the uptake,translocation and transformation of TCEP,TDCPP,TBEP and EHDPP in wheat(Triticum aestivum L.) was conducted by hydroponic exposure.Root uptake followed the order:EHDPP > TBEP > TDCPP > TCEP,while TCEP was the most prone to acropetal translocation.Dialkyl and diaryl phosphates were also found both in wheat roots and shoots,which are considered to be the main metabolites of organophosphate tri-esters.Concentrations of metabolites in wheat roots were much higher than those in shoots.Chlorinated OPEs were more resistant to degradation compared with the non-chlorinated ones.This study provides important information for better understanding the information on plant uptake and transformation of OPEs.
Plant uptake and accumulation are the significant steps in the transfer of contaminants into the food chain as well as an important process in their global cycling.Nevertheless,there has been no research addressing plant uptake of organophosphate esters(OPEs).A detailed investigation on the uptake,translocation and transformation of TCEP,TDCPP,TBEP and EHDPP in wheat(Triticum aestivum L.) was conducted by hydroponic exposure.Root uptake followed the order:EHDPP > TBEP > TDCPP > TCEP,while TCEP was the most prone to acropetal translocation.Dialkyl and diaryl phosphates were also found both in wheat roots and shoots,which are considered to be the main metabolites of organophosphate tri-esters.Concentrations of metabolites in wheat roots were much higher than those in shoots.Chlorinated OPEs were more resistant to degradation compared with the non-chlorinated ones.This study provides important information for better understanding the information on plant uptake and transformation of OPEs.
引文
[1]Van der Veen,I.;De Boer,J.Chemosphere 2012,88:1119-1153
[2]Reemtsma,T.;Quintana,J.B.;Rodil,R.;Garc?a-Lopez,M.;Rodr?guez,I.Tr AC Trend.Anal.Chem.2008,27:727-737.
[2]Reemtsma,T.;Quintana,J.B.;Rodil,R.;Garc?a-Lopez,M.;Rodr?guez,I.Tr AC Trend.Anal.Chem.2008,27:727-737.