Accumulation, speciation, and coordination of arsenic in an inbred line and a wild type cultivar of the desert plant species Chilopsis linearis (Desert willow)
Accumulation, speciation, and coordination of arsenic in an inbred line and a wild type cultivar of the desert plant species Chilopsis linearis (Desert willow)
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DOI：
10.1016/j.phytochem.2009.01.010
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发表时间：
2009-03-01
期刊：
影响因子：
3.8
通讯作者：
Gardea-Torresdey, Jorge L.
中科院分区：
文献类型：
--
作者：
Castillo-Michel, Hiram A.;Zuverza-Mena, Nubia;Gardea-Torresdey, Jorge L.
本文研究了荒漠植物Chilopsis linearis （desert willow）对砷（As）、硫(S)和磷(P)的吸收。比较了自交系（红色花）和野生型（白色花）植物对砷处理的不同反应。用砷酸盐(AS（2)O(5), AS -v）处理1月龄幼苗7 d。20和40mg As-v - L-1。ICP-OES分析结果表明，在20 mg As-v -1浓度下，红花植株根和茎的干wt分别为280 +/- 11和98 +/- 7 mg As kg(-1)，而白花植株根和茎的干wt分别为196 +/- 30和103 +/- 13 mg As kg（-1）。在此处理水平下，两种植物叶片中砷的浓度均低于检测限。在40 mg As-v -1处理下，红花植株的根和茎中砷含量分别为290 +/- 77和151 +/- 60 mg As kg(-1)，叶片中未检测到砷含量，而白花植株的根、茎和叶中砷含量分别为406 +/- 36、213 +/- 12和177 +/- 40 mg As kg（-1）。所有As处理植株的S浓度均升高，而两种类型植株的根和茎以及红花植株的叶片中P浓度均降低。x射线吸收光谱分析表明，在两种类型的植物中，砷酸盐以As-(SX)(3)种的形式部分还原为亚砷酸盐。2009爱思唯尔有限公司版权所有。
This study investigated the absorption of arsenic (As), sulfur (S), and phosphorus (P) in the desert plant Chilopsis linearis (Desert willow). A comparison between an inbred line (red flowered) and wild type (white flowered) plants was performed to look for differential responses to As treatment. One month old seedlings were treated for 7 days with arsenate (AS(2)O(5), As-v) at 0. 20, and 40 mg As-v L-1. Results from the ICP-OES analysis showed that at 20 mg As-v L-1, red flowered plants had 280 +/- 11 and 98 +/- 7 mg As kg(-1) dry wt in roots and stems, respectively, while white flowered plants had 196 +/- 30 and 103 +/- 13 mg As kg(-1) dry wt for roots and stems. At this treatment level, the concentration of As in leaves was below detection limits for both plants. In red flowered plants treated with 40 mg As-v L-1, As was at 290 +/- 77 and 151 +/- 60 mg As kg(-1) in roots and stems, respectively, and not detected in leaves, whereas white flowered plants had 406 +/- 36, 213 +/- 12, and 177 +/- 40 mg As kg(-1) in roots, stems, and leaves. The concentration of S increased in all As treated plants, while the concentration of P decreased in roots and stems of both types of plants and in leaves of red flowered plants. X-ray absorption spectroscopy analyses demonstrated partial reduction of arsenate to arsenite in the form of As-(SX)(3) species in both types of plants. (C) 2009 Elsevier Ltd. All rights reserved.