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  • 标题:Uptake of Cadmium by Lemna minor, a (hyper?-) accumulator plant involved in phytoremediation applications
  • 本地全文:下载
  • 作者:D. Bianconi ; F. Pietrini ; A. Massacci
  • 期刊名称:E3S Web of Conferences
  • 印刷版ISSN:2267-1242
  • 电子版ISSN:2267-1242
  • 出版年度:2013
  • 卷号:1
  • 页码:1-4
  • DOI:10.1051/e3sconf/20130113002
  • 出版社:EDP Sciences
  • 摘要:Metal pollution in waters and soils is a major environmental and human health problem. Cadmium (Cd2 ) is a heavy metal displaying toxic effects in plants. In this work we studied the potentiality of Lemna minor, a monocotyledonous aquatic macrophyte, to phytoremediate cadmium-polluted waters. The plants were exposed to different cadmium concentrations 0, 13, 22 and 46μM CdSO4 for a period of 24, 48 and 72 hours. Relative growth rates (RGR), bioconcentration factor (BCF), tolerance index (Ti), cadmium uptake in whole plant and maximum efficiency of PSII (Fv/Fm) were measured under controlled climate conditions. RGR, Ti and Fv/Fm declined with increasing exposure time and cadmium concentrations, while the BCF and cadmium uptake showed an opposite behavior. Data analysis of RGR, BCF, Tiand FV/FM indicates that L. minor maintains a good capacity of growth, metal bioconcentration, tolerance and efficiency of PSII up to 48h in plants exposed to 13 and 22μM CdSO4. Our results exhibited that L. minor is a good cadmium accumulator and is able to remediate Cd-polluted waters, especially at low Cd concentrations.
  • 关键词:Lemna minor; cadmium (Cd); phytoremediation; chlorophyll a fluorescence.
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