Clonal differences in mercury tolerance, accumulation, and distribution in willow.
Clonal differences in mercury tolerance, accumulation, and distribution in willow.
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DOI：
10.2134/jeq2004.1779
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发表时间：
2004-09
影响因子：
2.4
通讯作者：
Yaodong Wang;M. Greger
中科院分区：
文献类型：
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作者：
Yaodong Wang;M. Greger
本研究旨在研究柳属植物对汞的耐受性、积累和转运，以期利用柳属植物修复受汞污染的土壤。用0 ~ 15 μ m HgCl(2)溶液培养试验了6个柳（Salix spp.）无性系对汞的耐性。结果表明，柳对汞的敏感性差异较大，但在营养液中添加0.5 μ m HgCl(2)时，8个试验柳无性系对汞的积累和向茎部的转运相似。通过根系积累的总汞中，只有0.45 ~ 0.62%被转移到茎部。因此，根系是柳树积累汞的主要组织，根系中大部分（80%）的汞结合在细胞壁上。
This study was performed to investigate mercury (Hg) tolerance, accumulation, and translocation within the genus Salix for the potential use of this plant to remediate Hg-contaminated sites. Six clones of willow (Salix spp.) were tested on tolerance to Hg by treating plants grown in solution culture with 0 to 15 microM HgCl(2). Results showed that willow had a large variation in its sensitivity to Hg. However, the accumulation and translocation of Hg to shoots was similar in the eight tested willow clones as shown by cold vapor atomic absorption spectrometry analysis when plants were treated with 0.5 microM HgCl(2) in a nutrient solution. The majority of total Hg accumulated was localized to the roots, whereas only 0.45 to 0.62% of the total Hg accumulated via roots was translocated to the shoots. Thus, the root system is the main tissue of willow that accumulates Hg and the majority of the Hg in the root system (80%) was bound in the cell wall.