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首页> 外文期刊>Environmental Science & Technology >Hydroxylated Metabolites of 4-Monochlorobinhenyl and Its Metabolic Pathway in Whole Poplar Plants
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Hydroxylated Metabolites of 4-Monochlorobinhenyl and Its Metabolic Pathway in Whole Poplar Plants

机译：杨树全株中4-一氯二苯甲基的羟基代谢产物及其代谢途径

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摘要

4-Monochlorobiphenyl (CB3), mainly an airborne pollutant, undergoes rapid biotransformation to produce hydroxylated metabolites (OH-CB3s). However, up to now, hydroxylation of CB3 has not been studied in living organisms. In order to explore the formation of hydroxylated metabolites of CB3 in whole plants, poplars (Populus deltoides × nigra, DN34) were exposed to CB3 for 10 days. Poplars are a model plant with complete genomic sequence, and they are widely used in phytoremediation. Results showed poplar plants can metabolize CB3 into OH-CB3S. Three monohydroxy metabolites, including 2'-hydroxy-4-chlorobiphenyl (2'OH-CB3), 3'-hydroxy-4-chlorobiphenyl (3'OH-CB3), and 4'-hydroxy-4-chlorobiphenyl (4'OH -CB3), were identified in hydroponic solution and in different parts of the poplar plant The metabolite 4'OH-CB3 was the major product In addition, there were two other unknown monohydroxy metabolites of CB3 found in whole poplar plants. Based on their physical and chemical properties, they are likely to be 2-hydroxy-4-chlorobiphenyl (2OH-CB3) and 3-hydroxy-4-chlorobiphenyl (3OH-CB3). Compared to the roots and leaves, the middle portion of the plant (the middle wood and bark) had higher concentrations of 2'OH-CB3, 3'OH-CB3, and 4'OH-CB3, which suggests that these hydroxylated metabolites of CB3 are easily translocated in poplars from roots to shoots. The total masses of 2'OH-CB3, 3'OH-CB3, and 4'OH-CB3 in whole poplar plants were much higher than those in solution, strongly suggesting that it is mainly the poplar plant itself which metabolizes CB3 to OH-CB3s. Finally, the data suggest that the metabolic pathway be via epoxide intermediates.
机译：4-一氯联苯（CB3）是主要的空气污染物，经过快速的生物转化，生成羟基化代谢物（OH-CB3s）。然而，迄今为止，尚未在活生物体中研究CB3的羟基化。为了探索整个植物中CB3羟基化代谢产物的形成，将杨树（Populus deltoides×nigra，DN34）暴露于CB3 10天。杨树是具有完整基因组序列的模型植物，广泛用于植物修复中。结果表明，杨树植物可以将CB3代谢为OH-CB3S。三种单羟基代谢物，包括2'-羟基-4-氯联苯（2'OH-CB3），3'-羟基-4-氯联苯（3'OH-CB3）和4'-羟基-4-氯联苯（4'OH -CB3）是在水培溶液中以及在杨树植物的不同部位鉴定出来的。代谢产物4'OH-CB3是主要产物。此外，在整个杨树植物中还发现了另外两种未知的CB3单羟基代谢产物。基于它们的物理和化学性质，它们很可能是2-羟基-4-氯联苯（2OH-CB3）和3-羟基-4-氯联苯（3OH-CB3）。与根和叶相比，植物的中间部分（中间的木材和树皮）具有较高的2'OH-CB3、3'OH-CB3和4'OH-CB3浓度，这表明这些羟基化代谢产物CB3容易在杨树中从根到芽转移。整个杨树植物中2'OH-CB3、3'OH-CB3和4'OH-CB3的总质量比溶液中的高得多，强烈表明主要是由杨树本身将CB3代谢为OH-。 CB3。最后，数据表明代谢途径是通过环氧化物中间体。

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  • 来源
    《Environmental Science & Technology》 |2010年第10期|P.3901-3907|共7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;

    rnDepartment of Occupational and Environmental Health, The University of Iowa, Iowa City, Iowa 52242;

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

  • 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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