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| Phytostabilization potential of Phalaris arundinacea L. for cadmium and copper contaminated soil in arid area |
| Received:August 17, 2015 |
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| KeyWord:reed canary grass;accumulation;drought;phytostabilization;heavy metal |
| Author Name | Affiliation | E-mail | | GUI Jing | Department of Grassland Science, College of Animal Science and Technology, Northwest A & F University, Yangling 712100, China | | | LIU Juan | Department of Grassland Science, College of Animal Science and Technology, Northwest A & F University, Yangling 712100, China | | | GAO Wei | Department of Grassland Science, College of Animal Science and Technology, Northwest A & F University, Yangling 712100, China | | | WANG Quan-zhen | Department of Grassland Science, College of Animal Science and Technology, Northwest A & F University, Yangling 712100, China | wangquanzhen191@163.com |
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| Abstract: |
| A pot experiment was carried out in greenhouse to examine the phytostabilization potential of reed canary grass(Phalaris arundinacea L.) for cadmium(Cd) and copper(Cu) polluted soil in arid regions. An orthogonal experimental design with three factors(i.e., Cd, Cu, and soil moisture) and three levels(i.e., Cd at 50, 110, and 170 mg·kg-1, Cu at 100, 275, and 450 mg·kg-1, and soil moisture at 20%, 50%, and 80%) of each factor was employed. Biomass, MDA, and proline content as well as Cd and Cu accumulation of the grass were examined. At soil moisture of 20%, the grass exhibited chlorosis, shrinkage, and wilting, and its biomass was the lowest, but content of MDA and proline was significantly increased. However, no significant differences were found between the other treatments and the control. These three factors influenced biomass and MDA content in order of soil moisture content> Cd concentration> Cu concentration, while they affected proline content in sequence of soil moisture content> Cu concentration> Cd concentrations. The accumulation of Cd and Cu in roots was higher than that in shoots. The bioaccumulation factors of both cadmium and copper were greater than 1, with that of cadmium being greater than that of copper. The translocation factors of cadmium and copper were lower than 1. These results suggest that Phalaris arundinacea L. has a certain tolerance to cadmium and copper as well as water stress, and is a promising candidate for phytostabilization of Cd and Cu polluted soil in moderate drought areas. |
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