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Constitutional tolerance to heavy metals of a fiber crop, ramie (Boehmeria nivea), and its potential usage |
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| Authors: | B Yang WS Shu ZH Ye RL Qiu GX Cui |
| Institution: | a State Key Laboratory of Biocontrol, and School of Life Sciences, Sun Yat-sen (Zhongshan) University, Guangzhou 510275, PR China b Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology, and School of Sciences and Engineering, Sun Yat-sen (Zhongshan) University, Guangzhou 510275, PR China c The Institute of Bast Fiber Crops, The Chinese Academy of Agricultural Sciences, Changsha 410205, PR China d Ramie Research Institute, Hunan Agricultural University, Changsha 410128, PR China e Croucher Institute for Environmental Sciences, and Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR, PR China |
| Abstract: | 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. |
| Keywords: | Constitutional tolerance Heavy metals Phytoremediation Ramie |
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