Nano Zero-Valent Iron Mediated Metal(loid) Uptake and Translocation by Arbuscular Mycorrhizal Symbioses

Wu, Sean F.; Vosátka, Miroslav; Vogel‐Mikuš, Katarina; Kavčič, Anja; Kelemen, Mitja; Šepec, Luka; Pelicon, Primož; Skála, Roman; Powter, Antonio Roberto Valero; Teodoro, Manuel; Michálková, Zuzana

doi:10.1021/acs.est.7b05516

Cited by 50 publications

(14 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By using Particle-induced Xray emission (PIXE), Orłowska et al (2011) also found that Ni was accumulated in fungal structures inside AM roots of a Ni hyperaccumulator (Berkheya coddii Roessler). A recent study by Wu et al (2018b) observed that Zn was mainly immobilized by arbuscules in the mycorrhizal maize roots grown in Zn/Pb contaminated soils. These studies collectively revealed that mycorrhizal stabilization of heavy metals may be a common strategy for plants capable of forming AM symbiosis to tolerate heavy metals in soil.…”

Section: Cr Translocation and Transformation In Plant Roots As Influementioning

confidence: 96%

Arbuscular mycorrhiza and plant chromium tolerance

Zhang

Huang

et al. 2019

Soil Ecol. Lett.

Self Cite

View full text Add to dashboard Cite

REVIEW A B S T R A C T Arbuscular mycorrhizal (AM) fungi are ubiquitous soil fungi that form symbiotic associations with most terrestrial plants. The growth and functions of AM fungi depend on carbohydrates supplied by the plants, in return, the fungi assist the plants to acquire mineral nutrients (e.g., phosphorus) from soil. The AM symbiosis also improves plant survival in various unfavorable environments, such as metal (loid) contaminated soil. It has been well demonstrated that AM symbiosis improved plant adaptation to Cr contamination, which would have a great potential in phytoremediation and ecological restoration of Cr contaminated soils. In this paper, we have reviewed the role of AM fungi in alleviation of Cr phytotoxicity and associated factors influencing plant Cr tolerance. AM symbiosis improves plant Cr tolerance through its direct roles in Cr stabilization and transformation and indirect roles via AM symbiosis mediated nutrient acquisition and physiological regulation. Future research on physiological and molecular mechanisms underlying Cr behavior and detoxification in AM symbiosis, as well as potential use of AM fungi in ecological restoration and agriculture production in Cr contaminated soils were also proposed.

show abstract

Section: Cr Translocation and Transformation In Plant Roots As Influementioning

confidence: 96%

Arbuscular mycorrhiza and plant chromium tolerance

Zhang

Huang

et al. 2019

Soil Ecol. Lett.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, AM fungi reduced the availability of heavy metals in the soil ( Figure 3 ). Second, in addition to the immobilization of heavy metals in the soil, the AM fungi could bind heavy metals in the fungal structures in the roots (e.g., intraradical hyphae, and vesicles), thereby inhibiting the transport of heavy metals to the aerial parts [ 16 , 22 , 25 , 30 , 31 ]. For example, when nZVI was added, the AM inoculation increased the root Zn concentration, but did not increase the shoot Zn concentration.…”

Section: Discussionmentioning

confidence: 99%

“…However, few studies have focused on the role of nZVI and AM fungi in soil phytoremediation. Wu et al [ 16 ] found that nZVI (0.5%, w / w ) and AM fungi altered metal(loid) uptake and translocation by maize plants. Therefore, to fill the knowledge gap, it is necessary to study the combined effect of nZVI and AM fungi in the phytoremediation of heavy metal-contaminated soil.…”

Section: Introductionmentioning

confidence: 99%

Contribution of Nano-Zero-Valent Iron and Arbuscular Mycorrhizal Fungi to Phytoremediation of Heavy Metal-Contaminated Soil

et al. 2021

View full text Add to dashboard Cite

Soil pollution with heavy metals has attracted increasing concern, which calls for the development of new remediation strategies. The combination of physical, chemical, and biological techniques can achieve more efficient remediation. However, few studies have focused on whether nanomaterials and beneficial microbes can be jointly used to facilitate phytoremediation. Therefore, we studied the role of nano-zero-valent iron (nZVI) and arbuscular mycorrhizal (AM) fungi in the phytoremediation of an acidic soil polluted with Cd, Pb and Zn, using sweet sorghum. X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), and mapping analyses were conducted to explore the mechanisms of metal immobilization by nZVI. The results showed that although both bare nZVI (B-nZVI) and starch-stabilized nZVI (S-nZVI) inhibited root mycorrhizal colonization, Acaulospora mellea ZZ successfully colonized the plant roots. AM inoculation significantly reduced the concentrations of DTPA-Cd, -Pb, and -Zn in soil, and the concentrations of Cd, Pb, and Zn in plants, indicating that AM fungi substantially facilitated heavy metal immobilization. Both B-nZVI and S-nZVI, ranging from 50 mg/kg to 1000 mg/kg, did not impede plant growth, and generally enhanced the phytoextraction of heavy metals. XRD, EDS and mapping analyses showed that S-nZVI was more susceptible to oxidation than B-nZVI, and thus had more effective immobilization effects on heavy metals. Low concentrations of nZVI (e.g., 100 mg/kg) and AM inoculation had synergistic effects on heavy metal immobilization, reducing the concentrations of Pb and Cd in roots and enhancing root Zn accumulation. In conclusion, our results showed that AM inoculation was effective in immobilizing heavy metals, whereas nZVI had a low phytotoxicity, and they could jointly contribute to the phytoremediation of heavy metal-contaminated soils with sweet sorghum.

show abstract

“…Most studies related to nZVI interactions with plants have shown no or minimal (usually at high concentrations) effects on their functions, e.g., Ma, et al [25] found a reduction of transpiration and growth of poplars after the application of 200 mg L −1 nZVI; Martínez-Fernández and Komárek [23] found reductions in the root hydraulic conductivity of tomato plants growing at concentrations of 100 mg L −1 nZVI, due to aggregation on the root surfaces. These works suggest that alterations of plant functions may not be due simply to direct chemical phytotoxicity, but are also a result of physical interactions between ENPs and plant cell transport paths [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…These ENPs can function as scavengers for contaminants, mainly because of their high reactivity and large specific surface area [6]. Nanosized zero-valent iron (nZVI) has recently become popular for use as a stabilizing agent for metal and metalloid contaminants, due to its strong reducing properties and high reactivity, which affect contaminant mobility through adsorption, redox reactions and surface precipitation and/or co-precipitation in the form of metal iron oxides [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Zero-Valent Iron Has Minimum Toxicological Risk on the Germination and Early Growth of Two Grass Species with Potential for Phytostabilization

et al. 2020

Self Cite

View full text Add to dashboard Cite

Two Poaceae species, Agrostis capillaris and Festuca rubra, were selected for their potential as phytostabilizing plants in multicontaminated soils. These species are resistant to contamination and maintain high concentrations of contaminants at the root level. Nanoscale zero-valent iron (nZVI) is an engineered nanomaterial with the ability to stabilize metal(loid)s in soils; its potential toxicological effects in the selected species were studied in a germination test using: (i) control variant without soil; (ii) soil contaminated with Pb and Zn; and (iii) contaminated soil amended with 1% nZVI, as well as in an hydroponic experiment with the addition of nZVI 0, 25, 50 and 100 mg L−1. nZVI had no negative effects on seed germination or seedling growth, but was associated with an increase in shoot growth and reduction of the elongation inhibition rate (root-dependent) of F. rubra seedlings. However, applications of nZVI in the hydroponic solution had no effects on F. rubra but A. capillaris developed longer roots and more biomass. Increasing nZVI concentrations in the growing solution increased Mg and Fe uptake and reduced the Fe translocation factor. Our results indicate that nZVI has few toxic effects on the studied species.

show abstract

Nano Zero-Valent Iron Mediated Metal(loid) Uptake and Translocation by Arbuscular Mycorrhizal Symbioses

Cited by 50 publications

References 73 publications

Arbuscular mycorrhiza and plant chromium tolerance

Arbuscular mycorrhiza and plant chromium tolerance

Contribution of Nano-Zero-Valent Iron and Arbuscular Mycorrhizal Fungi to Phytoremediation of Heavy Metal-Contaminated Soil

Nanoscale Zero-Valent Iron Has Minimum Toxicological Risk on the Germination and Early Growth of Two Grass Species with Potential for Phytostabilization

Contact Info

Product

Resources

About