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Phytoremediation potential and physiological response of Miscanthus × giganteus cultivated on fertilized and non-fertilized flotation tailings

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Abstract

A 2-year field experiment was carried out with aim to assess the phytoremediation potential of Miscanthus × giganteus cultivated on the flotation tailings and to evaluate the effects of mineral NPK fertilizer on metal accumulation and plant physiological parameters and growth. Flotation tailings of the mine Rudnik (Serbia) are burdened with Pb, Cu and Zn and cause heavy metal pollution and deterioration of the surrounding ecosystems. In the second year of growth, plants retained the major portion of metals within their roots, with bioconcentration factor > 1 for Cu and Zn and < 1 for Pb. Their translocation factors were far below 1, showing that M. × giganteus acts as excluder of Cu, Zn and especially Pb. Higher amounts of Pb and Zn in leaves reduced the photosynthetic rate and total antioxidative capacity, but increased lipid peroxidation level. Changes at physiological level resulted in pronounced leaf senescence, reduced plant growth rate and annual biomass yield. Fertilization enhanced metal uptake by plant roots, but had no effect on their translocation to leaves. It improved chlorophyll a content, potential efficiency of Photosystem II photochemistry and biomass yield. Overall results indicate that M. × giganteus can be cultivated on the abandoned flotation tailings and that fertilization had positive effects on its physiology and growth.

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Acknowledgements

We thank the staff of Mine “Rudnik” for providing us the experimental field on the mine flotation tailings and for the technical support.

Funding

This study was funded by Serbian Ministry of Education, Science and Technological Development (grant number 173030 and TR31057).

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Correspondence to Tamara Rakić.

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The authors declare that they have no conflict of interest.

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Responsible editor: Elena Maestri

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Andrejić, G., Šinžar-Sekulić, J., Prica, M. et al. Phytoremediation potential and physiological response of Miscanthus × giganteus cultivated on fertilized and non-fertilized flotation tailings. Environ Sci Pollut Res 26, 34658–34669 (2019). https://doi.org/10.1007/s11356-019-06543-7

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  • DOI: https://doi.org/10.1007/s11356-019-06543-7

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