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首页> 外文期刊>Environmental Science & Technology >Transformation of Natural and Synthetic Estrogens by Maize Seedlings
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Transformation of Natural and Synthetic Estrogens by Maize Seedlings

机译：玉米幼苗对天然和合成雌激素的转化

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摘要

In agricultural fields, crop plants may transform orrndegrade hormonally active compounds in manure used as fertilizer andrnthereby affect the overall endocrine-disrupting activity of agriculturalrnrunoff. This study examined the transformation of two natural steroidrnestrogens [17/β-estradiol (17/β-E2) and estrone (E1)] and two syntheticrnestrogen mimics [zeranol (α-ZAL) and zearalanone (ZAN)] by maizernseedlings. Growing whole maize seedlings in hydroponic solutions ofrntarget estrogens resulted in both oxidative (i.e., 17β-E2 to El and α-ZALrnto ZAN) and reductive (i.e., E1 to 17β-E2 and ZAN to α-ZAL)rntransformations. Although all four estrogens accumulated in maize rootsrnas both parents and products, the shoots contained only 17/β-E2 and α-rnZAL, regardless of whether they were the parent or the product. Crudernplant enzyme extracts led to substantial reductive transformations butrncreated only trace amounts of oxidation products. In contrast, only oxidative transformations occurred in solutions exposed tornplant-associated microbes. Thus, the combined effects of plant enzymes and plant-associated microbes account for the reversiblerntransformations observed with whole plants. These effects are expected to generally decrease the overall estrogenicity of runoffrnfrom manure-fertilized fields.
机译：在农业领域，农作物可能会转化肥料中用作肥料的荷尔蒙活性化合物，从而影响农业径流的整体内分泌干扰活动。这项研究检查了玉米淀粉幼虫对两种天然甾体雌激素[17 /β-雌二醇（17 /β-E2）和雌酮（E1）]和两种合成雌激素模拟物[zeranol（α-ZAL）和泽拉丙酮（ZAN）]的转化。在目标雌激素的水耕溶液中种植整粒玉米幼苗会导致氧化（即从17β-E2变成E1和Z-α-ZALrntoZAN）和还原性（即从E1到17β-E2和ZAN变成α-ZAL）转化。尽管所有四个雌激素都在玉米根中既有亲本也有产品积累，但无论它们是亲本还是产品，这些芽仅含有17 /β-E2和α-rnZAL。芸苔属植物的酶提取物导致大量的还原转化，但仅产生痕量的氧化产物。相反，暴露于与植物相关的微生物的溶液中仅发生氧化转化。因此，植物酶和植物相关微生物的共同作用解释了在整个植物中观察到的可逆转化。预期这些作用通常会降低肥料肥料田间径流的总体雌激素性。

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  • 来源
    《Environmental Science & Technology》 |2013年第10期|5101-5108|共8页
  • 作者

    Marcella L. Card; Jerald L. Schnoor; Yu-Ping Chin;

  • 作者单位

    Environmental Science Graduate Program The Ohio State University, 125 South Oval Mall, Columbus, Ohio 43210, United States,National Research Centre for Environ-mental Toxicology, 39 Kessels Road, Coopers Plains, Queens-land 4108, Australia;

    Department of Civil and Environmental Engineering, College of Engineering, University of Iowa, 4119 Seamans Center, Iowa City, Iowa 52242, United States;

    School of Earth Sciences, The Ohio State University, 125 South Oval Mall, Columbus, Ohio 43210, 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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