Accumulation and transportation of copper in different ecotypes of Leersia hexandra Swartz |
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Authors: | Hua Lin Xue-Hong Zhang Liang Liang Jing Tian Jia-cheng Xian |
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Institution: | 1. College of Environmental Science and Engineering, Guilin University of Technology, Guilin, China;2. Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin, China |
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Abstract: | ABSTRACTThis study used hydroponics with different copper (Cu) concentrations to assess metal accumulation and growth in two different populations of Leersia hexandra Swartz, one obtained from a contaminated area (CP) and the other from a non-contaminated area (NCP). Data demonstrated that Cu exerted a lesser effect on the biomass of CP than NCP. The root and shoot biomass measurements of CP were significantly higher than those noted at NCP. Copper concentration in the tissues of L. hexandra from CP increased markedly correlated with the concentration of metal in the culture solution, and this trend was stronger than that in NCP. Copper concentrations in roots and shoots were significantly higher in CP than NCP. As Cu stress levels in the culture solution rose, the transport coefficient of both populations decreased. Furthermore, the coefficient of CP was significantly higher than NCP. At a Cu concentration of 38.4 mg/L, the transfer factor value of CP is 40% higher than NCP. In summary, CP showed higher accumulation and resistance to Cu compared with NCP. |
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Keywords: | Leersia hexandra Swartz population difference copper accumulation and transport |
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