Journal
ENVIRONMENTAL POLLUTION
Volume 158, Issue 2, Pages 551-558Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2009.08.043
Keywords
Constitutional tolerance; Heavy metals; Phytoremediation; Ramie
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Funding
- National 863 Project of China [2001AA645010-3]
- National Natural Science Foundation of China [30570345]
- NSFC-Guangdong United Foundation [U0833004]
- Guangdong Natural Science Group Foundation [06202438]
- Research Council of University Grants Committee, Hong Kong [HKBU-218/03M]
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It is observed that ramie (Boehmeria nivea), an economic fiber crop, can establish and colonize metal-contaminated sites in China. Metal tolerance and accumulation by ramie originating from 13 metal-contaminated and 4 clean sites in China were compared under field and hydroponic conditions. All selected populations and germplasms displayed good growth performance under diverse metal-contaminated habitats; while growth responses, metal accumulation and tolerance were similar among the 8 populations and 2 germplasms when exposed to solutions containing elevated As, Cd, Pb, or Zn in the laboratory. These revealed that ramie possesses a certain degree of constitutional metal tolerance. To our knowledge, this is the first report of constitutional metal tolerance possessed by a fiber crop. Ramie can be considered as a good candidate for both fiber production and phytoremediation of sites contaminated by multi-metals, as it accumulates relative low metal concentrations, but possesses both high biomass and high economic value. (C) 2009 Elsevier Ltd. All rights reserved.
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