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Comparison of soil to plant transfer of uranium, radium and 210Po to wheat using three cultivation methods: hydroponics, plantlet and pot cultures. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07624-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lai JL, Liu ZW, Luo XG. A metabolomic, transcriptomic profiling, and mineral nutrient metabolism study of the phytotoxicity mechanism of uranium. JOURNAL OF HAZARDOUS MATERIALS 2020; 386:121437. [PMID: 31899027 DOI: 10.1016/j.jhazmat.2019.121437] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 10/05/2019] [Accepted: 10/08/2019] [Indexed: 05/28/2023]
Abstract
Uranium (U) is a nonessential element that is readily adsorbed and retained in plant roots, causing root damage plants, rather than being translocated to other parts of the plant. The phytotoxicity mechanism of U is poorly understood. In this study, Vicia faba, a model plant for toxicological research, was selected as experimental material to investigate the phytotoxicity mechanism of U. In this study, the effects of U on the growth and development, methonome, transcriptome and mineral nutrient metabolism of V. faba were studied under different U treatments (0-25 μM) by integrating metabolomics, transcriptomic, and mineral nutrient metabolism analysis techniques. The results showed that U accumulation in roots and aboveground parts reached 164.34-927.90 μg/pot, and 0.028-0.119 μg/pot, respectively. U was mainly accumulated in the cell wall of roots, which damaged the root microstructure and inhibited root growth and development. In terms of mineral nutrient metabolism, U treatment (0-25 μM) led to changes in mineral metabolic profiles of seedlings. In total, 612 different metabolites were identified in nontargeted metabolomics, including 309 significantly upregulated metabolites and 303 significantly downregulated metabolites. Using RNA-seq, 4974 differentially expressed genes (DEGs) were identified under the high-concentration U treatment (25 μM), including 1654 genes significantly upregulated genes and 3320 genes significantly downregulated genes. Metabolic pathway analysis showed that a high concentration of U led to an imbalance of mineral nutrient metabolism in plants and changes in the metabolism and transcriptome pathway of plants, including alterations in the function of plasmodesmata and auxin signal transduction pathway. The latter finding may potentially explain the toxic effect of U on plant roots.
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Affiliation(s)
- Jin-Long Lai
- College of Environment and Resources, Southwest University of Science and Technology, Mianyang, 621010, China; Engineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, China.
| | - Ze-Wei Liu
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China.
| | - Xue-Gang Luo
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China; Engineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, China.
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Henner P, Brédoire F, Tailliez A, Coppin F, Pierrisnard S, Camilleri V, Keller C. Influence of root exudation of white lupine (Lupinus albus L.) on uranium phytoavailability in a naturally uranium-rich soil. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2018; 190-191:39-50. [PMID: 29751206 DOI: 10.1016/j.jenvrad.2018.04.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 04/26/2018] [Accepted: 04/26/2018] [Indexed: 06/08/2023]
Abstract
Mechanisms of uranium (U) transfer from soil to plants remain poorly understood. The kinetics of supply of U to the soil solution from solid phases could be a key point to understand its phytoavailability and implications for environmental risk assessment. Root activity, particularly the continuous release of organic acids in the rhizosphere, could have an effect on this supply. We tested the impact of citrate exudation by roots of Lupinus albus, either P-sufficient (P+) or P-deficient (P-), on the phytoavailability of U from a naturally contaminated soil (total content of 413 mg U kg-1) using a rhizotest design. Combined effects of P (P-/P+ used to modulate plant physiology) and citrate (model exudate) on the solubilization of U contained in the soils were tested in closed reactors (batch). The batch experiment showed the existence of a low U available pool (0.4% total U) and high accessibility (kd' around 20 L kg-1) which was not significantly affected by P treatment or citrate concentrations. Analysis of U, Fe, Ca, P and citrate concentrations in the batches suggested a complex combination of mechanisms and factors including desorption, resorption, precipitation, co-sorption. On rhizotest, L. albus plants extracted 0.5-0.75% of the total U and between 25 and 40% of the estimated available U present in the rhizotest in 5 days. Uranium accumulation at the whole plant level (20 mg U kg-1d.w., shoot to root ratio around 10-3) seemed to be dependent neither on the plant P nutrition status nor citrate exudation level, possibly in relation with the equivalent accessibility of U whatever the growth conditions. Yet differential translocation to shoots seemed to be positively correlated to citrate exudation.
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Affiliation(s)
- Pascale Henner
- Institute for Radioprotection and Nuclear Safety (IRSN/PSE-ENV/SRTE), Laboratory of Research on Radionuclides Transfer Within Terrestrial Ecosystems (LR2T), Cadarache, Bat 183, BP 3, 13115 Saint Paul-lez-Durance, France.
| | - Félix Brédoire
- Institute for Radioprotection and Nuclear Safety (IRSN/PSE-ENV/SRTE), Laboratory of Research on Radionuclides Transfer Within Terrestrial Ecosystems (LR2T), Cadarache, Bat 183, BP 3, 13115 Saint Paul-lez-Durance, France
| | - Antoine Tailliez
- Institute for Radioprotection and Nuclear Safety (IRSN/PSE-ENV/SRTE), Laboratory of Research on Radionuclides Transfer Within Terrestrial Ecosystems (LR2T), Cadarache, Bat 183, BP 3, 13115 Saint Paul-lez-Durance, France
| | - Frédéric Coppin
- Institute for Radioprotection and Nuclear Safety (IRSN/PSE-ENV/SRTE), Laboratory of Research on Radionuclides Transfer Within Terrestrial Ecosystems (LR2T), Cadarache, Bat 183, BP 3, 13115 Saint Paul-lez-Durance, France
| | - Sylvie Pierrisnard
- Institute for Radioprotection and Nuclear Safety (IRSN/PSE-ENV/SRTE), Laboratory of Research on Radionuclides Transfer Within Terrestrial Ecosystems (LR2T), Cadarache, Bat 183, BP 3, 13115 Saint Paul-lez-Durance, France
| | - Virginie Camilleri
- Institute for Radioprotection and Nuclear Safety (IRSN/PSE-ENV/SRTE), Laboratory of Research on Radionuclides Effects on Ecosystems (LECO), Cadarache, Bat 183, BP 3, 13115 Saint Paul-lez-Durance, France
| | - Catherine Keller
- Aix Marseille Univ, CNRS, IRD, INRA, Coll France, CEREGE, BP 80, 13545 Aix-en-Provence Cedex 04, France
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Boghi A, Roose T, Kirk GJD. A Model of Uranium Uptake by Plant Roots Allowing for Root-Induced Changes in the soil. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:3536-3545. [PMID: 29466669 DOI: 10.1021/acs.est.7b06136] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We develop a model with which to study the poorly understood mechanisms of uranium (U) uptake by plants. The model is based on equations for transport and reaction of U and acids and bases in the rhizosphere around cylindrical plant roots. It allows for the speciation of U with hydroxyl, carbonate, and organic ligands in the soil solution; the nature and kinetics of sorption reactions with the soil solid; and the effects of root-induced changes in rhizosphere pH. A sensitivity analysis showed the importance of soil sorption and speciation parameters as influenced by pH and CO2 pressure; and of root geometry and root-induced acid-base changes linked to the form of nitrogen taken up by the root. The root absorbing coefficient for U, relating influx to the concentration of U species in solution at the root surface, was also important. Simplified empirical models of U uptake by different plant species and soil types need to account for these effects.
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Affiliation(s)
- Andrea Boghi
- School of Water, Energy & Environment , Cranfield University , Cranfield, Bedford MK43 0AL , U.K
| | - Tiina Roose
- Faculty of Engineering and Environment , University of Southampton , Southampton SO17 1BJ , U.K
| | - Guy J D Kirk
- School of Water, Energy & Environment , Cranfield University , Cranfield, Bedford MK43 0AL , U.K
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