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The variation of REE (rare earth elements) patterns in soil-grown plants: a new proxy for the source of rare earth elements and silicon in plants

机译：土壤植物中REE（稀土元素）模式的变化：植物中稀土元素和硅来源的新代表

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摘要

Rare earth elements (REEs) in five species of soil-grown plants (Taxodium japonicum, Populus sieboldii, Sasa nipponica, Thea sinensis and Vicia villosa) and in the soil on which each plant grew were determined with an inductively coupled plasma mass spectrometer (ICP-MS) in order to observe the variation in the distribution of REEs and to elucidate their source in soil-grown plants. The plant samples were divided into root (secondary root and main root), trunk (stem) and leaf; the soils into water soluble (soilsoluble fraction), HCl and HNO3 soluble (soilnon-silicate fraction) and HF soluble (soilsilicate fraction). The REE abundances of samples were compared using REE patterns where the abundances were normalized to those of a chondrite and plotted on a logarithmic scale against the atomic number. All the plants showed similar REE patterns independent of species and location, and a W-shape variation (W-type tetrad effect) and abundance depletion of cerium (negative Ce anomaly) were found in each REE patterns of plants, more conspicuous tetrad effect being observed in HREE (heavier rare earth elements) region than in LREE (lighter rare earth elements) region. The overall variation of REE patterns of each secondary root was not similar to that of soilsoluble fraction, but similar to that of soilsilicate fraction except for the tetrad effect and Ce anomaly. The REE patterns can be interpreted by the idea that plants of different species take in REEs and Si from different parts in the soil. The results of this study seem to imply that Sasa nipponica and Vicia villosa take in free REEs and Si rather directly from silicate in the soil, and that a majority of REEs and Si in Taxodium japonicum and Thea sinensis are originated from the soluble fraction in the soil.
机译：用电感耦合等离子体质谱仪（ICP）测定五种土壤生长植物（日本Taxodium japonicum，Populus sieboldii，Sasa nipponica，Thea sinensis和Vicia villosa）中以及每种植物生长的土壤中的稀土元素（REE）。 -MS），以观察REE分布的变化并阐明土壤植物中REE的来源。将植物样品分为根（次生根和主根），树干（茎）和叶。土壤分为水溶性（soilsolve 馏分），HCl和HNO3 可溶性（soilnon-silates 馏分）和HF可溶性（soilsilates 馏分） ）。使用REE模式比较样品的REE丰度，其中将丰度标准化为球粒陨石的丰度，并以对数标度相对于原子序数作图。所有植物均表现出相似的REE模式，而与物种和位置无关，并且在每种REE模式中均发现了W形变化（W型四元效应）和铈的丰度耗尽（Ce负异常），其中更明显的四元效应是在HREE（重稀土元素）区域观察到的结果比在LREE（轻稀土元素）区域观察到的结果好。次生根的REE模式总体变化与土壤可溶性级分不相似，但与四硅土效应和Ce异常不同，与土壤硅酸盐级分相似。 。 REE模式可以通过以下想法来解释：不同物种的植物从土壤的不同部分吸收REE和Si。这项研究的结果似乎表明，日本莎草和野豌豆直接从土壤中的硅酸盐中吸收了游离的REE和Si，而日本红豆杉和Thea sinensis中的大部分REE和Si则来自于土壤中的可溶性部分。泥。

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  • 来源
    《Plant and Soil》 |2001年第1期|53-64|共12页
  • 作者

    FengFu Fu; Tasuku Akagi; Sadayo Yabuki; Masaya Iwaki;

  • 作者单位

    Division of Surface Characterization The Institute of Physical and Chemical Research (RIKEN);

    Faculty of Agriculture Tokyo University of Agriculture and Technology;

    Division of Surface Characterization The Institute of Physical and Chemical Research (RIKEN);

    Division of Surface Characterization The Institute of Physical and Chemical Research (RIKEN);

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    rare earth elements; REE pattern; silicon; soil; terrestrial plants;

    机译：稀土元素稀土元素格局硅土陆地植物;

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