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| Uptake kinetic characteristics and subcellular distribution of Pb2+ and Cd2+ in Neyraudia reynaudiana |
| Received:February 19, 2016 |
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| KeyWord:Neyraudia reynaudiana;Pb;Cd;absorption kinetics;subcellular distribution |
| Author Name | Affiliation | E-mail | | LUO Jie-wen | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Co-innovation Center for Soil and Water Conservation in Red Soil Region of the Cross-straits, Fuzhou 350002, China | | | HUANG Mei-ying | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Co-innovation Center for Soil and Water Conservation in Red Soil Region of the Cross-straits, Fuzhou 350002, China | | | YIN Dan-yang | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Co-innovation Center for Soil and Water Conservation in Red Soil Region of the Cross-straits, Fuzhou 350002, China | | | WU Peng-fei | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Co-innovation Center for Soil and Water Conservation in Red Soil Region of the Cross-straits, Fuzhou 350002, China | | | CAI Li-ping | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Co-innovation Center for Soil and Water Conservation in Red Soil Region of the Cross-straits, Fuzhou 350002, China | | | ZHOU Chui-fan | College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Co-innovation Center for Soil and Water Conservation in Red Soil Region of the Cross-straits, Fuzhou 350002, China | zhouchuifan@163.com |
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| Abstract: |
| Neyraudia reynaudiana is a soil-conservating plant and can grow well in heavy metal polluted soils. Here a solution culture experiment was conducted to examine uptake and subcellular distrubution of Pb and Cd in the plant under different metal levels and stress times. Results showed that the uptake of Pb and Cd by N. reynaudiana increased with heavy metal concentrations and stress time. Freundlich and Michaelis-Menten equations fit the data very well, R2>0.95. It was also revealed that heavy metals were mainly distributed in the roots. Neyraudia reynaudiana had greater absorption ability for Pb(the highest content reached to 4 687.87 mg·kg-1), but higher absorption rate for Cd. For subcellular distribution, Pb and Cd were mainly distributed in the cell walls and soluble constituents. Under different concentrations and stress times of Pb and Cd, the Pb/Cd content in cell wall and soluble constituent subcellular components accounted for over 60% of the total. Therefore, N. reynaudiana has stronger absorption ability of Pb, and it could change the subcellular distribution of heavy metals to reduce the toxicity of heavy metals for maintaining its steady state. This study provides theoretical support for screening phytoremediation materials. |
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