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Sulfate Metabolites of 4-Monochlorobiphenyl in Whole Poplar Plants

机译：杨树全株中4-一氯联苯的硫酸盐代谢产物

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摘要

4-Monochlorobiphenyl (PCB3) has been proven to be transformed into hydroxylated metabolites of PCB3 (OH-PCB3s) in whole poplar plants in our previous work. However, hydroxvlated metabolites of PCBs, including OH-PCB3s, as the substrates of sulfotransferases have not been studied in many organisms including plants in vivo. Poplar (Populus deltoides × nigra, DN34) was used to investigate the further metabolism from OH-PCB3s to PCB3 sulfates because it is a model plant and one that is frequently utilized in phytoremediation. Results showed poplar plants could metabolize PCB3 into PCB3 sulfates during 25 day exposures. Three sulfate metabolites, including 2'-PCB3 sulfate, 3'-PCB3 sulfate, and 4'-PCB3 sulfate, were identified in poplar roots and their concentrations increased in the roots from day 10 to day 25. The major products were 2'-PCB3 sulfate and 4'-PCB3 sulfate. However, the concentrations of PCB3 sulfates were much lower than those of OH-PCB3s in the roots, suggesting the sequential transformation of these hydroxylated PCB3 metabolites into PCB3 sulfates in whole poplars. In addition, 2'-PCB3 sulfate or 4'-PCB3 sulfate was also found in the bottom wood samples indicating some translocation or metabolism in woody tissue. Results suggested that OH-PCB3s were the substrates of sulfotransferases which catalyzed the formation of PCB3 sulfates in the metabolic pathway of PCB3.
机译：在我们之前的工作中，已证明4-单氯联苯（PCB3）在整个杨树植物中都可以转化为PCB3（OH-PCB3s）的羟基化代谢产物。但是，尚未在包括植物在内的许多生物体内研究过包括多羟基联苯（OH-PCB3s）在内的多氯联苯的羟基化代谢产物。杨树（Populus deltoides×nigra，DN34）被用于研究从OH-PCB3到PCB3硫酸盐的进一步代谢，因为它是一种典型的植物，并且是植物修复中经常使用的植物。结果表明，在暴露25天后，杨树植物可将PCB3代谢为PCB3硫酸盐。从第10天到第25天，在杨树根中鉴定出3种硫酸盐代谢物，包括2'-PCB3硫酸盐，3'-PCB3硫酸盐和4'-PCB3硫酸盐，并且它们在根中的浓度增加。主要产物为2'-硫酸PCB3和4'-PCB3硫酸盐。然而，硫酸根中PCB3的浓度远低于根中OH-PCB3的浓度，表明这些杨酸化的PCB3代谢产物在整个杨树中依次转化为PCB3硫酸盐。此外，在底部木材样品中还发现了2'-PCB3硫酸盐或4'-PCB3硫酸盐，表明木质组织中有些移位或代谢。结果表明，OH-PCB3s是磺基转移酶的底物，可在PCB3的代谢途径中催化PCB3硫酸盐的形成。

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  • 来源
    《Environmental Science & Technology》 |2013年第1期|557-562|共6页
  • 作者

    Guangshu Zhai; Hans-Joachim Lehmler; Jerald L. Schnoor;

  • 作者单位

    Department of Civil and Environmental Engineering and IIHR Hydroscience and Engineering, The University of Iowa, Iowa City, Iowa 52242, United States;

    Department of Occupational and Environmental Health, The University of Iowa, Iowa City, Iowa 52242, United States;

    Department of Civil and Environmental Engineering and IIHR Hydroscience and Engineering, The University of Iowa, Iowa City, Iowa 52242, United States,Department of Occupational and Environmental Health, The University of Iowa, Iowa City, Iowa 52242, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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