Potentials of Miscanthus x giganteus for phytostabilization of trace element-contaminated soils: Ex situ experiment

Nsanganwimana, Florien; Souki, Karim Suhail Al; Waterlot, Christophe; Douay, Francis; Pelfrêne, Aurélie; Ridošková, Andrea; Louvel, Brice; Pourrut, Bertrand

doi:10.1016/j.ecoenv.2021.112125

Cited by 29 publications

(18 citation statements)

References 45 publications

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“…Miscanthus × giganteus has demonstrated considerable phytostabilization capacities in different polluted areas. Besides accumulating toxic elements (TEs) mainly in their underground parts, they contribute to restoring soil functionality and biological activities [7,11,21]. However, the distinctive attribute of miscanthus is its ability to thrive and develop well in such degraded areas.…”

Section: Discussionmentioning

confidence: 99%

“…Andrejić et al [23], Jiang et al [24] and Zhang et al [25] also showed that Zn, Cd/As and Cd concentrations in miscanthus aboveground parts increased proportionally along with the spiked-soil concentrations. The rise in the leaf TE concentrations could be a result of their increased exposure and uptake/translocation due to the limited soil volume and quantity in pots [18,21].…”

Section: Discussionmentioning

confidence: 99%

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Response of Three Miscanthus × giganteus Cultivars to Toxic Elements Stress: Part 1, Plant Defence Mechanisms

Souki

Liné

Douay

et al. 2021

Plants

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Miscanthus × giganteus demonstrated good phytostabilization potentials in toxic element (TE) contaminated soils. However, information about its tolerance to elevated concentrations is still scarce. Therefore, an ex-situ pot experiment was launched using three cultivars (termed B, U, and A) grown in soils with a gradient Cd, Pb and Zn concentrations. Control plants were also cultivated in non-contaminated soil. Results show that the number of tillers per plant, stem diameter as well as leaf photosynthetic pigments (chlorophyll a, b and carotenoids) were negatively impacted by soil contamination. On the other hand, phenolic compounds, flavonoids, tannins, and anthocyanins levels along with the antioxidant enzymatic activities of superoxide dismutase, ascorbate peroxidase and glutathione reductase increased in the plants grown on contaminated soils. Altogether, these data demonstrate that miscanthus is impacted by concentrations of toxic elements yet is able to tolerate high levels of soil contamination. These results may contribute to clarifying the miscanthus tolerance strategy against high contamination levels and its efficiency in phytoremediation.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Response of Three Miscanthus × giganteus Cultivars to Toxic Elements Stress: Part 1, Plant Defence Mechanisms

Souki

Liné

Douay

et al. 2021

Plants

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“…TE accumulation in agricultural soils is of concern due to food safety issues, potential health risks, as well as detrimental effects on soil ecosystems [ 2 ]. The areas surrounding the former Pb smelter Metaleurop Nord in Northern France are an explicit example of the complexities that might arise as a result of intense land TE pollution [ 3 , 4 ]. The former smelter was active for more than a century and generated great quantities of dust.…”

Section: Introductionmentioning

confidence: 99%

Response of Three Miscanthus × giganteus Cultivars to Toxic Elements Stress: Part 2, Comparison between Two Growing Seasons

Souki

Liné

Moravec

et al. 2022

Plants

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The positive impact on restoring soil functionality, decreasing toxic elements (TE) bioaccessibility, and enhancing soil physicochemical and biological parameters established a consensus on considering a Miscanthus x giganteus convenient species for phytomanaging wide TE contaminated areas. Nevertheless, information about the plant’s mode of reaction to elevated soil multi-TE concentrations is still scarce. For the sake of investigating the miscanthus response to stressful TE concentrations, an ex-situ pot experiment was initiated for 18 months, with three miscanthus cultivars referred to as B, U, and A planted in soils with gradient Cd, Pb, and Zn concentrations. A non-contaminated control soil was introduced as well, and plants were cultivated within. Results revealed that the long exposure to increasing soil TE concentrations caused the number of tillers per plant to decline and the TE concentrations in the leaves to boost progressively with the soil contamination. The photosynthetic pigments (chlorophyll a, b, and carotenoids) were negatively affected as well. However, the phenolic compounds, flavonoids, tannins, and anthocyanins, along with the antioxidant enzymatic activities of superoxide dismutase, ascorbate peroxidase, and glutathione reductase elevated progressively with the TE concentration and exposure duration. Conclusively, miscanthus plants demonstrated an intensified and synchronized antioxidative activity against the TE concentration.

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“…The role of plants used in phytostabilization is primarily to protect the surface of contaminated soil from water and wind erosion and to reduce the amount of leachate produced after rainfall [16]. This is only possible if the plants can develop a dense cover and a deep and highly branched root system [17]. They should also demonstrate considerable tolerance to PTEs, intensive transpiration and high accumulation of PTEs in roots accompanied by a low accumulation in above-ground parts [18].…”

Section: Introductionmentioning

confidence: 99%

Biochar-Assisted Phytostabilization for Potentially Toxic Element Immobilization

et al. 2021

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In response to the growing threat to the quality of the soil environment, new technologies are being developed to protect and remediate contaminated sites. A new approach, namely, assisted phytostabilization, has been used in areas contaminated with high levels of potentially toxic elements (PTEs), using various soil additives. This paper determined the effectiveness of biochar-assisted phytostabilization using Dactylis glomerata L. of soil contaminated with high concentrations of the selected PTEs (in mg/kg soil): Cu (780 ± 144), Cd (25.9 ± 2.5), Pb (13,540 ± 669) and Zn (8433 ± 1376). The content of the selected PTEs in the roots and above-ground parts of the tested grass, and in the soil, was determined by atomic absorption spectrometry (AAS). The addition of biochar to the contaminated soil led to an increase in plant biomass and caused an increase in soil pH values. Concentrations of Cu, Cd, Pb and Zn were higher in the roots than in the above-ground parts of Dactylis glomerata L. The application of biochar significantly reduced the total content of PTEs in the soil after finishing the phytostabilization experiment, as well as reducing the content of bioavailable forms extracted from the soil using CaCl2 solution, which was clearly visible with respect to Cd and Pb. It is concluded that the use of biochar in supporting the processes of assisted phytostabilization of soils contaminated with PTEs is justified.

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Potentials of Miscanthus x giganteus for phytostabilization of trace element-contaminated soils: Ex situ experiment

Cited by 29 publications

References 45 publications

Response of Three Miscanthus × giganteus Cultivars to Toxic Elements Stress: Part 1, Plant Defence Mechanisms

Response of Three Miscanthus × giganteus Cultivars to Toxic Elements Stress: Part 1, Plant Defence Mechanisms

Response of Three Miscanthus × giganteus Cultivars to Toxic Elements Stress: Part 2, Comparison between Two Growing Seasons

Biochar-Assisted Phytostabilization for Potentially Toxic Element Immobilization

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