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Vicia villosa Roth: a cover crop to phytoremediate arsenic polluted environments

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Abstract

Vicia villosa Roth is a legume species with a growing application in Argentina as a cover crop (CC), a practice that favors the sustainable development of agricultural systems. However, several areas where the use of this CC provides numerous advantages are affected by high concentrations of arsenic (As). Thus, in the present work we studied hairy vetch ability to cope with arsenate [As(V)], arsenite [As(III)], and the mixture of both along with oxidative stress indexes [chlorophyll content, malondialdehyde (MDA) equivalents] as well as anatomical and histological changes in the root structure. The results obtained suggested a different behavior of hairy vetch depending on its growth stage and on metal(oid) concentration. The roots treated with the contaminant showed less turgidity, thickening of the epidermal and subepidermal parenchymal outer layers, and the presence of dark deposits. The morpho-anatomic parameters (cortex length, vascular cylinder diameter, total diameter, and vascular cylinder area) were altered in plants treated with As(V) and As(V)/As(III) whereas the roots of plants treated with As(III) did not show significant differences respect to the control. Moreover V. villosa could tolerate and remove As from soil, thus the use of this legume species seems an attractive approach to remediate As while protecting contaminated soils.

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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This work was supported by the grants from Secretaría de Ciencia y Técnica-Universidad Nacional de Río Cuarto (SECyT-UNRC) (PPI 2016–2018), Fondo Nacional para la Investigación Científica y Tecnológica (FONCYT) (PICT 447/15), and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) (PIP). Sabrina G Ibañez, Claudia N Travaglia, and Elizabeth Agostini are members of the Research Career from CONICET (Argentina).

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Sabrina G. Ibañez did all the experiments. Claudia N. Travaglia contributed with the execution and analysis of microscopical assays. Sabrina G. Ibañez and Elizabeth Agostini designed the experiments, analyzed the results, and wrote the paper. Claudia N. Travaglia, María I. Medina, and Elizabeth Agostini critically revised and correct the manuscript.

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Correspondence to Sabrina G. Ibañez.

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The authors declare no competing interests.

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Responsible Editor: Philipp Gariguess

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Ibañez, S.G., Travaglia, C.N., Medina, M.I. et al. Vicia villosa Roth: a cover crop to phytoremediate arsenic polluted environments. Environ Sci Pollut Res 28, 38604–38612 (2021). https://doi.org/10.1007/s11356-021-13529-x

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  • DOI: https://doi.org/10.1007/s11356-021-13529-x

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