Abstract
Although it is known that the first As hyperaccumulator identified, Pteris vittata L., could exist in As-contaminated as well as uncontaminated soils, intra-specific variation in As accumulation among metallicolous (from As-contaminated soils) and nonmetallicolous populations (from uncontaminated soils) of P. vittata has not been fully explored. Variations in As concentrations of fronds were observed in three nonmetallicolous populations and four metallicolous populations of P. vittata collected from southeast China. The kinetics study showed that the concentration-dependent influx of arsenate and arsenite observed followed Michaelis–Menten kinetics, and that the average V max for arsenate and arsenite was apparently larger in the three nonmetallicolous populations than that in the three metallicolous populations. The pot trials indicated that the nonmetallicolous populations had significantly (p < 0.05) higher frond biomass, about 1.5–1.9-folds, when compared with the metallicolous populations in 250 and 500 mg As kg−1 soil treatments. The pot trials also demonstrated that the nonmetallicolous population of P. vittata had a significantly higher accumulation and translocation capacity for As. The present study suggests that As removal by P. vittata can be greatly enhanced by the judicious selection of the appropriate populations.
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Acknowledgments
We sincerely thank Ms. Sue Fung (Hong Kong Baptist University) for improving the manuscript. This study was supported by Areas of Excellence (AoE) Scheme “Centre for Marine Environmental Research and Innovative Technology” (AoE/P-04/04) of the Hong Kong Research Grants Council, and the Key project of the Education Commission of Henan Province (13A610043), China.
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Wu, F., Deng, D., Wu, S. et al. Arsenic tolerance, uptake, and accumulation by nonmetallicolous and metallicolous populations of Pteris vittata L. Environ Sci Pollut Res 22, 8911–8918 (2015). https://doi.org/10.1007/s11356-013-1593-1
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DOI: https://doi.org/10.1007/s11356-013-1593-1