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首页> 外文会议>Biogeochemistry of Trace Elements: Environmental Protection, Remediation and Human Health international Symposium >Determination of the enhancement of lead phytoextraction by Medicago sativa assisted by phytohormones and EDTA
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Determination of the enhancement of lead phytoextraction by Medicago sativa assisted by phytohormones and EDTA

机译：苜蓿和EDTA辅助的紫花苜蓿对铅提取的促进作用的测定

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摘要

In this study, alfalfa plants grown in hydroponics were exposed to 40mg Pb L1, ethylenediaminetetraacetic acid (EDTA) equimolar to Ph, and 1, 10 and 100μM of the phytohormones indole-3- acetic acid (IAA) and kinetin (Kn). An additional treatment containing Pb/EDTA/IAA/Kn was set. In this treatment both hormones were used at 100μM concentration. Lead uptake by alfalfa was determined by ICP/OES and XAS was used to determine the oxidation state of Pb in roots, stems, and leaves of alfalfa plants. Plants exposed to Pb/EDTA/100μM IAA/Kn acumulated about 9 500mg (Pb)·kg dry weight mass (d wt) in leaves (2275% more Pb than the treatment containing Pb/EDTA). This result demonstrated that the mixture EDTA/phytohormones enhanced the Pb uptake and translocation from the roots to the leaves high enough to make alfalfa reach the category of a Pb hyperaccumulator plant. The XAS studies demonstrated that Pb was absorbed and transported from the roots to the leaves as Pb (II).
机译：在这项研究中，将在水培法中生长的苜蓿植物暴露于40mg Pb L1，与Ph等摩尔的乙二胺四乙酸（EDTA）以及1,10和100μM的植物激素吲哚-3-乙酸（IAA）和激动素（Kn）中。设置了包含Pb / EDTA / IAA / Kn的其他处理方法。在这种治疗中，两种激素均以100μM的浓度使用。通过ICP / OES测定苜蓿对铅的吸收，并用XAS测定苜蓿植物根，茎和叶中铅的氧化态。暴露于Pb / EDTA /100μMIAA / Kn的植物叶片中的干重约为9 500mg（Pb）·kg干重（d wt）（比含Pb / EDTA的处理多出2275％的Pb）。该结果表明，EDTA /植物激素的混合物增强了Pb的吸收和从根部到叶片的转运，迁移的程度足以使苜蓿达到Pb超富集植物的范畴。 XAS研究表明，Pb以Pb（II）的形式从根部吸收并转运到叶片。

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    Yuna Pan; Jin Chen;

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    J. L. Gardea-Torresdey@Chemistry Department University of Texas at El Paso El Paso Texas 79968 USA Environmental Science and Engineering PhD Program University of Texas at El Paso El Paso TX 79968 USA Phone (915) 747-5359 Fax (915) 747-5748--M. L. Loez@Environmental Science and Engineering PhD Program University of Texas at El Paso El Paso TX 79968 USA Phone (915) 747-5359 Fax (915) 747-5748--J. R. Peralta-Videa@Chemistry Department University of Texas at El Paso El Paso Texas 79968 USA--T. Benitez@Chemistry Department University of Texas at El Paso El Paso Texas 79968 USA--J. G. Parsons@Chemistry Department University of Texas at El Paso El Paso Texas 79968 USA--;

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    Medicago; EDTA; phytoextraction; phytohormones;

    机译：紫花苜蓿; EDTA;植物提取植物激素;

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