The Common Ice Plant (Mesembryanthemum crystallinum L.)–Phytoremediation Potential for Cadmium and Chromate-Contaminated Soils
| Autor: | Zbigniew Miszalski, Adriana Kaczmarczyk, Michał Nosek, Agnieszka Lis-Krzyścin, Marta Śliwa-Cebula, Paweł Kaszycki |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
cadmium chemistry.chemical_element Plant Science 010501 environmental sciences 01 natural sciences plant stress tolerance phytoextraction chemistry.chemical_compound hyperaccumulation Dry weight chromate lcsh:Botany Ecology Evolution Behavior and Systematics phytostabilization 0105 earth and related environmental sciences heavy metal stress Abiotic component Cadmium Ecology Chromate conversion coating biology Chemistry fungi Mesembryanthemum crystallinum food and beverages soil remediation biology.organism_classification lcsh:QK1-989 Phytoremediation Environmental chemistry Shoot Potassium chromate 010606 plant biology & botany |
| Zdroj: | Plants, Vol 9, Iss 1230, p 1230 (2020) Plants Volume 9 Issue 9 |
| ISSN: | 2223-7747 |
| Popis: | The common ice plant (Mesembryanthemum crystallinum L.) is a widely studied model due to its tolerance to numerous biotic and abiotic stresses. In this study, carried out in model pots, the plants were treated with variant doses of Cd(II) and Cr(VI) and proved resistant to extreme levels of these heavy metals. Initial toxicity symptoms were observed upon final concentrations of 818 mg Cd kg&minus 1 soil d.w., and 1699 mg Cr kg&minus 1 applied as potassium chromate. Biometric analyses revealed that none of the Cr(VI) doses affected dry weight of the plant organs thus maintaining the shoot-to-root ratio. The Cd and Cr hypertolerance strategies were divergent and resulted in different accumulation patterns. For the case of Cd(II), an excluder-like mechanism was developed to prevent the plant from toxicity. For chromate, high accumulation potential together with Cr(VI) root-to-shoot translocation at sublethal concentrations was revealed (up to 6152 mg Cr kg&minus 1 shoot at 4248 mg Cr kg&minus 1 soil). It is concluded that M. crystallinum reveals considerable phytoremediation capabilities due to unique growth potential in contaminated substrates and is suitable for bioreclamation of degraded soils. The plant is especially applicable for efficient phytoextraction of chromate-contamination, whereas for Cd-affected areas it may have a phytostabilizing effect. |
| Databáze: | OpenAIRE |
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