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Extracting cadmium in the presence of salt: a study on three poplar clones under controlled conditions

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Abstract

This study aimed at determining the cadmium phytoextraction potential of three Populus alba L. clones cultivated in the presence of increasing sodium chloride concentrations. Plantlets of a commercial and two autochthonous poplar clones were grown in perlite with nutrient solution enriched in CdSO4 (50 and 100 μM) and NaCl (25 and 50 mM), administered either alone or in combination. The three clones showed significant variation not only in cadmium and salt tolerance, accumulation and content, but also in the effect of the interaction between the two elements on these parameters. The toxic effect of Cd and salt excess on plants was mutually exacerbated by the presence of both. Even though the outcome of the joint treatment was always a decrease in shoot Cd or Na accumulation, the three clones showed variation in the extent of such reduction. Evaluating the total element content per plant shoot, the fast-growing commercial clone displayed the highest phytoextraction potential for Cd and Na, either alone or in mixture. Our results demonstrated for the first time that the Cd response in presence of salt can vary in the different clones.

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Acknowledgments

Mrs. Catia Boggi (IBBR-CNR) is gratefully acknowledged for her precious technical support.

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Correspondence to Maurizio Capuana.

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Responsible Editor: Elena Maestri

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Capuana, M., Bianchi, E., Cencetti, G. et al. Extracting cadmium in the presence of salt: a study on three poplar clones under controlled conditions. Environ Sci Pollut Res 28, 1040–1051 (2021). https://doi.org/10.1007/s11356-020-10536-2

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  • DOI: https://doi.org/10.1007/s11356-020-10536-2

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