Arbuscular mycorrhizal fungi can decrease the uptake of uranium by subterranean clover grown at high levels of uranium in soil

Rufyikiri, Gervais; Huysmans, Lien; Wannijn, Jean; Hees, May Van; Leyval, Corinne; Jakobsen, Iver

doi:10.1016/j.envpol.2003.12.021

Cited by 77 publications

(38 citation statements)

References 34 publications

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“…Below a critical Zn soil concentration, Zn uptake was enhanced, while above this level Zn translocation to the shoot decreased. The results of Rufyikiri et al (2004b) were corroborated by those obtained by Chen et al (2005aChen et al ( ,b,d, 2006 who observed an increased U immobilization in roots, a lower U accumulation in shoots and consequently, a lower translocation of U from rootto-shoot when plants were colonized by AM fungi. Chen et al (2005d) also noticed, using a compartmented pot system, that more U was partitioned to the shoots of Medicago truncatula when roots and hyphae could take up U than when only hyphae could develop in the contaminated soil compartment.…”

Section: Influence Of Am Fungi On Root-to-shoot U Translocationsupporting

confidence: 86%

Section: Influence Of Am Fungi On Root-to-shoot U Translocationmentioning

confidence: 90%

“…The results presented by Rufyikiri et al (2004b) showed that the biomass production of neither roots nor shoot was influenced by U levels. Rufyikiri et al (2004b) suggested that at the U levels tested, the fraction of U in the soil solution was probably extremely low due principally to the pH of the soil and were therefore not threatening for plant development. This is similar to previous observations and is in accordance with U ecotoxicity thresholds of 250 mg kg À1 dry soil proposed to be protective for terrestrial plants (Sheppard et al, 2005).…”

Section: Influence Of Am Fungi On Root-to-shoot U Translocationmentioning

confidence: 90%

“…The study presented by Rufyikiri et al (2004b) aimed at determining the role of the AM fungus G. intraradices in these processes. Mycorrhizal and non-mycorrhizal plants were grown in a substrate containing U concentrations from 0 to 87 mg kg À1 dry soil.…”

Section: Influence Of Am Fungi On Root-to-shoot U Translocationmentioning

confidence: 99%

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Impact of arbuscular mycorrhizal fungi on uranium accumulation by plants

Boulois

Joner

Leyval

et al. 2008

Journal of Environmental Radioactivity

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Contamination by uranium (U) occurs principally at U mining and processing sites. Uranium can have tremendous environmental consequences, as it is highly toxic to a broad range of organisms and can be dispersed in both terrestrial and aquatic environments. Remediation strategies of U-contaminated soils have included physical and chemical procedures, which may be beneficial, but are costly and can lead to further environmental damage. Phytoremediation has been proposed as a promising alternative, which relies on the capacity of plants and their associated microorganisms to stabilize or extract contaminants from soils. In this paper, we review the role of a group of plant symbiotic fungi, i.e. arbuscular mycorrhizal fungi, which constitute an essential link between the soil and the roots. These fungi participate in U immobilization in soils and within plant roots and they can reduce root-to-shoot translocation of U. However, there is a need to evaluate these observations in terms of their importance for phytostabilization strategies.

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Section: Influence Of Am Fungi On Root-to-shoot U Translocationsupporting

confidence: 86%

Section: Influence Of Am Fungi On Root-to-shoot U Translocationmentioning

confidence: 90%

Section: Influence Of Am Fungi On Root-to-shoot U Translocationmentioning

confidence: 90%

Section: Influence Of Am Fungi On Root-to-shoot U Translocationmentioning

confidence: 99%

See 2 more Smart Citations

Impact of arbuscular mycorrhizal fungi on uranium accumulation by plants

Boulois

Joner

Leyval

et al. 2008

Journal of Environmental Radioactivity

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“…However, according to previous work, negligible amount of U(VI) remain in the soluble and exchangeable forms over any significant time, thereby limiting the amount available for plant uptake and subsequent phytoremediation (Bunzl et al, 1995;Sheppard and Thibault, 1992). In addition, plant-associated microorganisms, including mycorrhizal fungi, may have significant effects on U uptake (Rufyikiri et al, 2002(Rufyikiri et al, , 2003(Rufyikiri et al, , 2004b. Arbuscular mycorrhizae (AM) are ubiquitous symbiotic associations between higher plants and soil fungi (Smith and Read, 1997) and their extraradical mycelium form bridges between plant roots and soil, and mediate the transfer of various elements into plants.…”

Section: +mentioning

confidence: 99%

Effects of the mycorrhizal fungus Glomus intraradices on uranium uptake and accumulation by Medicago truncatula L. from uranium-contaminated soil

et al. 2005

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Phytostabilization strategies may be suitable to reduce the dispersion of uranium (U) and the overall environmental risks of U-contaminated soils. The role of Glomus intraradices, an arbuscular mycorrhizal (AM) fungus, in such phytostabilization of U was investigated with a compartmented plant cultivation system facilitating the specific measurement of U uptake by roots, AM roots and extraradical hyphae of AM fungi and the measurement of U partitioning between root and shoot. A soil-filled plastic pot constituted the main root compartment (C A ) which contained a plastic vial filled with U-contaminated soil amended with 0, 50 or 200 mg KH 2 PO 4 )P kg -1 soil (C B ). The vial was sealed by coarse or fine nylon mesh, permitting the penetration of both roots and hyphae or of just hyphae. Medicago truncatula plants grown in C A were inoculated with G. intraradices or remained uninoculated. Dry weight of shoots and roots in C A was significantly increased by G. intraradices, but was unaffected by mesh size or by P application in C B . The P amendments decreased root colonization in C B , and increased P content and dry weight of those roots. Glomus intraradices increased root U concentration and content in C A , but decreased shoot U concentrations. Root U concentrations and contents were significantly higher when only hyphae could access U inside C B than when roots could also directly access this U pool.

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Microbial Bioremediation of Metals and Radionuclides

Gadd

2012

Encyclopedia of Environmetrics

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Microorganisms possess a variety of mechanisms that effect changes in metal speciation and mobility. As well as being components of natural elemental cycles for metals, these processes may be exploited in environmental biotechnology and almost all metal‐microbe interactions have been examined for removal, recovery, or detoxification of metal, organometal, metalloid, or metal radionuclide pollutants. Metal mobilization can be achieved by, for example, protonation, chelation, chemical and redox transformations, while immobilization can occur by precipitation or biomineralization, or by sorption, uptake, and intracellular sequestration. Redox reactions can mobilize or immobilize metals depending on the metal species involved. Solubilization may enable metal removal from solids such as soils, sediments, dumps, and industrial and mining wastes. Metal immobilization results in insoluble forms of low bioavailability. Biotechnological applications of microbial systems in bioremediation may provide alternatives or adjuncts to conventional treatment methods for solids, and contaminated effluents and wastewaters. While much research is laboratory‐based, there are many developments to pilot/demonstration scale, with several in situ and ex situ large‐scale processes in successful operation. Metal removal/transformation processes are also intrinsic components of traditional means of water/sewage treatment as well as reed bed, lagoon, and wetlands technologies.

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Arbuscular mycorrhizal fungi can decrease the uptake of uranium by subterranean clover grown at high levels of uranium in soil

Cited by 77 publications

References 34 publications

Impact of arbuscular mycorrhizal fungi on uranium accumulation by plants

Impact of arbuscular mycorrhizal fungi on uranium accumulation by plants

Effects of the mycorrhizal fungus Glomus intraradices on uranium uptake and accumulation by Medicago truncatula L. from uranium-contaminated soil

Microbial Bioremediation of Metals and Radionuclides

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