红麻对Cu和Cu-EDDS的吸收和富集
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家重点基础研究发展规划项目(2002CB410809);国家自然科学基金项目(40301046;40432005);中-荷战略科学联盟项目(2004CB720403);江苏省自然科学基金(BK2004166)资助


Plant Uptake and Accumulation of Cu and Cu-EDDS by Kenaf (Hibiscus Cannabinus L.)
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    生物可降解特性螯合剂[S,S]-乙二胺二琥珀酸(EDDS),被推荐用作污染土壤强化植物修复中的重金属活化试剂。我国能源经济作物红麻具有较高的地上生物产量,可望用于重金属污染土壤的植物吸取修复或稳定修复。通过水培试验研究了红麻对水培营养液中Cu及Cu-EDDS的吸收和富集效应。试验结果表明,能源植物红麻各组织中Cu的富集浓度依次为:根 > 叶 > 茎(皮)。扫描电镜-能谱分析表明,红麻根系从水培溶液中吸收的Cu主要经木质部导管向地上部运输。EDDS处理及Cu/EDDS摩尔比<1时,对红麻生长无急性植物毒性。红麻纤维皮层内Cu含量低于其他组织内的Cu含量,并低于纺织产品Cu含量标准(HJBZ 30-2000)。预测在Cu污染土壤上种植红麻,可望实现红麻纤维的安全生产,同时有可能实现对轻度Cu污染土壤的植物稳定和吸取修复。

    Abstract:

    The biodegradable chelator,[S, S]-isomer ethylenediaminedisuccinate (EDDS), has been proposed as an alternative soil additive used in enhanced phytoextraction of heavy metal contaminated soils. Energy plants with high biomass production can potentially be used in phytoextraction. In this study, a hydroponics experiment was conducted to investigate the uptake and accumulation of Cu and Cu-EDDS by kenaf (Hibiscus Cannabinus L.), one of the Chinese energy plants. The results showed that Cu concentration in plant tissues of kenaf was in the order of root > leaf > stem (skin). Scanning Electron Microscopy and energy dispersive X-ray spectrometer analysis suggested that Cu may be transported from root to the above ground tissues through xylem vessels. When the molar ratios between Cu and EDDS were below 1 and Cu concentrations were below 200μmol/L, there was no significant phytotoxicity be found to the plants. The Cu concentrations in the skin were lower than those in other plant parts as well as the national Cu standards for safety textile products (HJBZ30 2000). Kenaf (Hibiscus Cannabinus L.) is expected to be able to grow on slightly Cu contaminated soils to achieve safety fiber production, phytostabilization of the soils and phytoextraction of soil Cu.

    参考文献
    相似文献
    引证文献
引用本文

王国庆,李敏,骆永明,宋静,赵其国.红麻对Cu和Cu-EDDS的吸收和富集[J].土壤,2006,38(5):626-631. WANG Guo-qing, LI Min, LUO Yong-ming, SONG Jing, ZHAO Qi-guo. Plant Uptake and Accumulation of Cu and Cu-EDDS by Kenaf (Hibiscus Cannabinus L.)[J]. Soils,2006,38(5):626-631

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2017-05-20
  • 出版日期: