Enhancement of Uranium Phytoaccumulation From Contaminated Soils

Shahandeh, H.; Hossner, L. R.

doi:10.1097/00010694-200204000-00004

Cited by 77 publications

(39 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To our knowledge, the present study is the first one addressing the effects of AMF on plant uptake of As and U from soil contaminated with a mixture of As and U. Our data demonstrated that the Chinese brake fern could highly accumulate U, with TF values for roots as high as 14, which were much higher than those reported so far (e.g., for sunflower and Indian mustard root bioaccumulation coefficients were 8.1 and 5.4, respectively; Shahandeh and Hossner, 2002). TF values for the roots were increased by the inoculation with AMF, especially for G. intraradices.…”

Section: Discussioncontrasting

confidence: 49%

“…TF values for the roots were increased by the inoculation with AMF, especially for G. intraradices. However, translocation of U from the roots to the fronds was relatively low, and was also observed in many other plants (Saric et al, 1995;Shahandeh and Hossner, 2002). It is possible that the high TF values in mycorrhizal roots were the result of adsorption of U on or in mycorrhizal hyphae, and also likely U accumulation in intraradical hyphae due to efficient U translocation via hyphal pathway.…”

Section: Discussionmentioning

confidence: 83%

“…Total U content was 111 mg U kg À1 , and exchangeable and carbonate-U (following the methods described by Shahandeh and Hossner, 2002) were 8.9 and 29.3 mg kg À1 soil, respectively. Total As content was 106 mg As kg À1 , and water extractable As (soil: water = 1:10) was 5.9 mg kg À1 soil.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Effects of arbuscular mycorrhizal inoculation on uranium and arsenic accumulation by Chinese brake fern (Pteris vittata L.) from a uranium mining-impacted soil

2006

View full text Add to dashboard Cite

A glasshouse experiment was conducted to investigate U and As accumulation by Chinese brake fern, Pteris vittata L., in association with different arbuscular mycorrhizal fungi (AMF) from a U and As contaminated soil. The soil used contains 111 mg U kg À1 and 106 mg As kg À1. P. vittata L. was inoculated with each of three AMF, Glomus mosseae, Glomus caledonium and Glomus intraradices. Two harvests were made during plant growth (two and three months after transplanting). Mycorrhizal colonization depressed plant growth particularly at the early stages. TF (transfer factor) values for As from soil to fronds were higher than 1.0, while those for roots were much lower. Despite the growth depressions, AM colonization had no effect on tissue As concentrations. Conversely, TF values for U were much higher for roots than for fronds, indicating that only very small fraction of U was translocated to fronds (less than 2%), regardless of mycorrhizal colonization. Mycorrhizal colonization significantly increased root U concentrations at both harvests. Root colonization with G. mosseae or G. intraradices led to an increase in TF values for U from 7 (non-inoculation control) to 14 at the first harvest. The highest U concentration of 1574 mg kg À1 was recorded in roots colonized by G. mosseae at the second harvest. The results suggested that P. vittata in combination with appropriate AMF would play very important roles in bioremediation of contaminated environments characterized by a multi-pollution.

show abstract

Section: Discussioncontrasting

confidence: 49%

Section: Discussionmentioning

confidence: 83%

See 1 more Smart Citation

Effects of arbuscular mycorrhizal inoculation on uranium and arsenic accumulation by Chinese brake fern (Pteris vittata L.) from a uranium mining-impacted soil

2006

View full text Add to dashboard Cite

show abstract

“…Despite that no typical symptoms of P deficiency were found among inoculated pots, the potential effects of plant P nutrition status on U accumulation could not be neglected. It is documented that plant uptake of U is affected by various factors, such as soil properties (Shahandeh and Hossner, 2002) and uraniumphosphorus interactions (Ebbs et al, 1998;Jerden Jr. et al, 2003). When P was present at high concentrations, complexes between U and P could most likely be formed in the soil.…”

Section: Discussionmentioning

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

View full text Add to dashboard Cite

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.

show abstract

“…Mobility and bioavailability of contaminants are among others affected by pollution type and origin, the element's physicochemical form and type and the physicochemical characteristics of the environment itself. Previous efforts to unravel the relation between 'available' forms of U and availability for plant uptake have not been very promising [1][2][3][4][5]. A new approach to assess metal bioavailability in soils, the diffusive gradient in thin film (DGT) technique, was developed for sampling an available fraction of heavy metals in soils [6].…”

Section: Introductionmentioning

confidence: 99%

Method of diffusive gradients in thin films (DGT) compared with other soil testing methods to predict phytoavailability of uranium and selected heavy metals from multipolluted soils

et al. 2009

View full text Add to dashboard Cite

Abstract. The measurement of diffusive gradients in thin films (DGT) has been proposed as a surrogate for metal uptake by plants. A small-scale experiment was performed to test the predictive capacity of the DGT method with respect to uranium and heavy metal availability and uptake by ryegrass. Correlation analysis was performed to compare the results obtained with the DGT device with more conventional bioavailability indices: concentration in pore water or in selective extractants. Six soils with different histories of uranium contamination and with distinct soil characteristics were screened. For uranium, the bioavailability indices evaluated were highly correlated, indicating that uranium pools assessed were at least partially comparable. For heavy metals, bioavailability indices were hardly correlated. Uranium concentration in the pore water was a better predictor for uranium uptake than amount recovered following selective extraction. The concentration measured with DGT (C DGT ) was also highly correlated with plant uptake. However, the significance level was sensitive to the value of the diffusion coefficient (pH dependent or not) used to calculate C DGT . For the heavy metals screened, only in the case of Cd was uptake predicted by C DGT .

show abstract

Enhancement of Uranium Phytoaccumulation From Contaminated Soils

Cited by 77 publications

References 25 publications

Effects of arbuscular mycorrhizal inoculation on uranium and arsenic accumulation by Chinese brake fern (Pteris vittata L.) from a uranium mining-impacted soil

Effects of arbuscular mycorrhizal inoculation on uranium and arsenic accumulation by Chinese brake fern (Pteris vittata L.) from a uranium mining-impacted soil

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

Method of diffusive gradients in thin films (DGT) compared with other soil testing methods to predict phytoavailability of uranium and selected heavy metals from multipolluted soils

Contact Info

Product

Resources

About