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Wang L, Liang Y, Liu S, Chen F, Ye Y, Chen Y, Wang J, Paterson DJ, Kopittke PM, Wang Y, Li C. Effect of silicon on the distribution and speciation of uranium in sunflower (Helianthus annuus). JOURNAL OF HAZARDOUS MATERIALS 2024; 478:135433. [PMID: 39146584 DOI: 10.1016/j.jhazmat.2024.135433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 07/15/2024] [Accepted: 08/03/2024] [Indexed: 08/17/2024]
Abstract
Sunflower (Helianthus annuus) can potentially be used for uranium (U) phytoremediation. However, the factors influencing the absorption of U and its subsequent distribution within plant tissues remain unclear, including the effect of silicon (Si) which is known to increase metal tolerance. Here, using hydroponics, the effect of Si on the distribution and speciation of U in sunflower was examined using synchrotron-based X-ray fluorescence and fluorescence-X-ray absorption near-edge spectroscopy. It was found that ∼88 % of U accumulates within the root regardless of treatments. Without the addition of Si, most of the U appeared to bind to epidermis within the roots, whereas in the leaves, U primarily accumulated in the veins. The addition of Si alleviated U phytotoxicity and decreased U concentration in sunflower by an average of 60 %. In the roots, Si enhanced U distribution in cell walls and impeded its entry into cells, likely due to increased callose deposition. In the leaves, Si induced the sequestration of U in trichomes. However, Si did not alter U speciation and U remained in the hexavalent form. These results provide information on U accumulation and distribution within sunflower, and suggest that Si could enhance plant growth under high U stress.
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Affiliation(s)
- Linlin Wang
- Northwestern Polytechnical University, School of Ecology and Environment, Xi'an 710072, China
| | - Yanru Liang
- Northwestern Polytechnical University, School of Ecology and Environment, Xi'an 710072, China
| | - Song Liu
- Northwest A&F University, College of Agronomy, Yangling 712100, China
| | - Fan Chen
- Northwestern Polytechnical University, School of Ecology and Environment, Xi'an 710072, China
| | - Yin Ye
- Northwestern Polytechnical University, School of Ecology and Environment, Xi'an 710072, China
| | - Yanlong Chen
- Northwestern Polytechnical University, School of Ecology and Environment, Xi'an 710072, China
| | - Jingjing Wang
- Northwestern Polytechnical University, School of Ecology and Environment, Xi'an 710072, China
| | - David J Paterson
- Australian Synchrotron, ANSTO, Clayton, Victoria 3168, Australia
| | - Peter M Kopittke
- The University of Queensland, School of Agriculture and Food Sustainability, St Lucia, Queensland 4072, Australia
| | - Yuheng Wang
- Northwestern Polytechnical University, School of Ecology and Environment, Xi'an 710072, China.
| | - Cui Li
- Northwestern Polytechnical University, School of Ecology and Environment, Xi'an 710072, China.
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2
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Ali S, Baloch SB, Bernas J, Konvalina P, Onyebuchi EF, Naveed M, Ali H, Jamali ZH, Nezhad MTK, Mustafa A. Phytotoxicity of radionuclides: A review of sources, impacts and remediation strategies. ENVIRONMENTAL RESEARCH 2024; 240:117479. [PMID: 37884073 DOI: 10.1016/j.envres.2023.117479] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 10/01/2023] [Accepted: 10/22/2023] [Indexed: 10/28/2023]
Abstract
Various anthropogenic activities and natural sources contribute to the presence of radioactive materials in the environment, posing a serious threat to phytotoxicity. Contamination of soil and water by radioactive isotopes degrades the environmental quality and biodiversity. They persist in soils for a considerable amount of time and disturb the fauna and flora of any affected area. Hence, their removal from the contaminated medium is inevitable to prevent their entry into the food chain and the organisms at higher levels of the food chain. Physicochemical methods for radioactive element remediation are effective; however, they are not eco-friendly, can be expensive and impractical for large-scale remediation. Contrastingly, different bioremediation approaches, such as phytoremediation using appropriate plant species for removing the radionuclides from the polluted sites, and microbe-based remediation, represent promising alternatives for cleanup. In this review, sources of radionuclides in soil as well as their hazardous impacts on plants are discussed. Moreover, various conventional physicochemical approaches used for remediation discussed in detail. Similarly, the effectiveness and superiority of various bioremediation approaches, such as phytoremediation and microbe-based remediation, over traditional approaches have been explained in detail. In the end, future perspectives related to enhancing the efficiency of the phytoremediation process have been elaborated.
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Affiliation(s)
- Shahzaib Ali
- Department of Agroecosystems, Faculty of Agriculture and Technology, University of South Bohemia in Ceske Budejovice, Branišovská 1645/31A, 37005, Ceske Budejovice, Czech Republic
| | - Sadia Babar Baloch
- Department of Agroecosystems, Faculty of Agriculture and Technology, University of South Bohemia in Ceske Budejovice, Branišovská 1645/31A, 37005, Ceske Budejovice, Czech Republic
| | - Jaroslav Bernas
- Department of Agroecosystems, Faculty of Agriculture and Technology, University of South Bohemia in Ceske Budejovice, Branišovská 1645/31A, 37005, Ceske Budejovice, Czech Republic.
| | - Petr Konvalina
- Department of Agroecosystems, Faculty of Agriculture and Technology, University of South Bohemia in Ceske Budejovice, Branišovská 1645/31A, 37005, Ceske Budejovice, Czech Republic
| | - Eze Festus Onyebuchi
- Department of Agroecosystems, Faculty of Agriculture and Technology, University of South Bohemia in Ceske Budejovice, Branišovská 1645/31A, 37005, Ceske Budejovice, Czech Republic
| | - Muhammad Naveed
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan
| | - Hassan Ali
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, 38040, Pakistan
| | - Zameer Hussain Jamali
- College of Environmental Science, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China
| | - Mohammad Tahsin Karimi Nezhad
- Department of Forest Ecology, The Silva Tarouca Research Institute for Landscape and Ornamental 13 Gardening, Lidicka, 25/27, Brno, 60200, Czech Republic
| | - Adnan Mustafa
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences Guangzhou, 510650, China.
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Vallet A, Martin-Laffon J, Favier A, Revel B, Bonnot T, Vidaud C, Armengaud J, Gaillard JC, Delangle P, Devime F, Figuet S, Serre NBC, Erba EB, Brutscher B, Ravanel S, Bourguignon J, Alban C. The plasma membrane-associated cation-binding protein PCaP1 of Arabidopsis thaliana is a uranyl-binding protein. JOURNAL OF HAZARDOUS MATERIALS 2023; 446:130668. [PMID: 36608581 DOI: 10.1016/j.jhazmat.2022.130668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/14/2022] [Accepted: 12/23/2022] [Indexed: 06/17/2023]
Abstract
Uranium (U) is a naturally-occurring radionuclide that is toxic to living organisms. Given that proteins are primary targets of U(VI), their identification is an essential step towards understanding the mechanisms of radionuclide toxicity, and possibly detoxification. Here, we implemented a chromatographic strategy including immobilized metal affinity chromatography to trap protein targets of uranyl in Arabidopsis thaliana. This procedure allowed the identification of 38 uranyl-binding proteins (UraBPs) from root and shoot extracts. Among them, UraBP25, previously identified as plasma membrane-associated cation-binding protein 1 (PCaP1), was further characterized as a protein interacting in vitro with U(VI) and other metals using spectroscopic and structural approaches, and in planta through analyses of the fate of U(VI) in Arabidopsis lines with altered PCaP1 gene expression. Our results showed that recombinant PCaP1 binds U(VI) in vitro with affinity in the nM range, as well as Cu(II) and Fe(III) in high proportions, and that Ca(II) competes with U(VI) for binding. U(VI) induces PCaP1 oligomerization through binding at the monomer interface, at both the N-terminal structured domain and the C-terminal flexible region. Finally, U(VI) translocation in Arabidopsis shoots was affected in pcap1 null-mutant, suggesting a role for this protein in ion trafficking in planta.
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Affiliation(s)
- Alicia Vallet
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, IBS, 38000 Grenoble, France
| | | | - Adrien Favier
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, IBS, 38000 Grenoble, France
| | - Benoît Revel
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | - Titouan Bonnot
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | - Claude Vidaud
- BIAM, CEA, CNRS, Univ. Aix-Marseille, 13108 Saint-Paul-lez-Durance, France
| | - Jean Armengaud
- Département Médicaments et Technologies pour la Santé (DMTS), Université Paris-Saclay, CEA, INRAE, SPI, F-F-30200 Bagnols-sur-Cèze, France
| | - Jean-Charles Gaillard
- Département Médicaments et Technologies pour la Santé (DMTS), Université Paris-Saclay, CEA, INRAE, SPI, F-F-30200 Bagnols-sur-Cèze, France
| | - Pascale Delangle
- Univ. Grenoble Alpes, CEA, CNRS, GRE-INP, IRIG, SyMMES, 38000 Grenoble, France
| | - Fabienne Devime
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | - Sylvie Figuet
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | - Nelson B C Serre
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | | | | | - Stéphane Ravanel
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France
| | | | - Claude Alban
- Univ. Grenoble Alpes, CNRS, CEA, INRAE, IRIG, LPCV, 38000 Grenoble, France.
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4
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Jessat J, Moll H, John WA, Bilke ML, Hübner R, Kretzschmar J, Steudtner R, Drobot B, Stumpf T, Sachs S. A comprehensive study on the interaction of Eu(III) and U(VI) with plant cells (Daucus carota) in suspension. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129520. [PMID: 35908404 DOI: 10.1016/j.jhazmat.2022.129520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 06/23/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Daucus carota suspension cells showed a high affinity towards Eu(III) and U(VI) based on a single-step bioassociation process with an equilibrium after 48-72 h. Cells responded with an increased metabolic activity towards heavy metal stress. Luminescence spectroscopy pointed to multiple species for both f-block elements in the culture media, providing initial hints of their interaction with cells and released metabolites. Using nuclear magnetic resonance spectroscopy, we could prove that malate, as an released metabolite in the culture medium, was found to complex with U. Luminescence spectroscopy also showed that Eu(III)-EDTA species are interacting with the cells. Furthermore, Eu(III) and U(VI) coordination is dominated by phosphate groups provided by the cells. We found that Ca ion channels of D. carota cells were involved in the uptake of U(VI), which led to a bioprecipitation of U(VI) in the vacuole of the cells, most probably as uranyl(VI) phosphates along with an intracellular sorption of U(VI) on biomembranes by lipid structures. Eu(III) could be found locally concentrated in the cell wall and in the cytoplasm with a co-localization with phosphorous and oxygen.
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Affiliation(s)
- Jenny Jessat
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Henry Moll
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Warren A John
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Marie-Louise Bilke
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - René Hübner
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Jerome Kretzschmar
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Robin Steudtner
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Björn Drobot
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Thorsten Stumpf
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Susanne Sachs
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany.
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5
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Wu G, Chen X, Zheng T, Xiao PX, Zhong NY, Yang XL, Li Y, Li W. Effects of U on the growth, reactive oxygen metabolism and osmotic regulation in radish (Raphanus sativus L.). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:55081-55091. [PMID: 35312915 DOI: 10.1007/s11356-022-19803-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 03/15/2022] [Indexed: 06/14/2023]
Abstract
Uranium (U) is a non-essential and toxic element, so it is necessary to study the physiological mechanism of plant response to U stress. The present study evaluated the growth status, reactive oxygen metabolism and osmotic regulation system in radish (Raphanus sativus) under U stress (0, 25, 50 and 100 μM). The results showed that U had no significant effect on the germination of radish seeds but inhibited the growth of seedlings, such as reduced root activity and increased plasma membrane permeability. U is mainly distributed in radish roots, so it poisons the roots more than the aboveground parts. When U concentration was 25 μM, superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) activities in radish were increased to cope with the oxidative stress caused by U stress, and the accumulation of proline and soluble sugar was increased to maintain cell turgor. However, under high concentration (100 μM), the damage of radish root was serious; thus, the SOD, CAT and soluble sugar could not respond to U stress. In conclusion, the identification and characterization of U-stress responses in genuine U-tolerant plants would improve our knowledge on the detoxification of this radionuclide.
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Affiliation(s)
- Guo Wu
- Life Science College, Sichuan Normal University, Chengdu, 610101, China.
- Plant Functional Genomics and Bioinformatics Research Center, Sichuan Normal University, Chengdu, 610101, China.
| | - Xi Chen
- Life Science College, Sichuan Normal University, Chengdu, 610101, China
| | - Ting Zheng
- Life Science College, Sichuan Normal University, Chengdu, 610101, China
- Plant Functional Genomics and Bioinformatics Research Center, Sichuan Normal University, Chengdu, 610101, China
| | - Pi-Xian Xiao
- Life Science College, Sichuan Normal University, Chengdu, 610101, China
| | - Ning-Ying Zhong
- Life Science College, Sichuan Normal University, Chengdu, 610101, China
| | - Xiu-Lin Yang
- Life Science College, Sichuan Normal University, Chengdu, 610101, China
| | - Yi Li
- Life Science College, Sichuan Normal University, Chengdu, 610101, China
| | - Wei Li
- Life Science College, Sichuan Normal University, Chengdu, 610101, China
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6
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Sarthou MCM, Devime F, Baggio C, Figuet S, Alban C, Bourguignon J, Ravanel S. Calcium-permeable cation channels are involved in uranium uptake in Arabidopsis thaliana. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127436. [PMID: 34638071 DOI: 10.1016/j.jhazmat.2021.127436] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 09/28/2021] [Accepted: 10/03/2021] [Indexed: 06/13/2023]
Abstract
Uranium (U) is a non-essential and toxic element that is taken up by plants from the environment. The assimilation pathway of U is still unknown in plants. In this study, we provide several evidences that U is taken up by the roots of Arabidopsis thaliana through Ca2+-permeable cation channels. First, we showed that deprivation of Arabidopsis plants with calcium induces a 1.5-fold increase in the capacity of roots to accumulate U, suggesting that calcium deficiency promotes the radionuclide import pathway. Second, we showed that external calcium inhibits U accumulation in roots, suggesting a common route for the uptake of both cations. Third, we found that gadolinium, nifedipine and verapamil inhibit the absorption of U, suggesting that different types of Ca2+-permeable channels serve as a route for U uptake. Last, we showed that U bioaccumulation in Arabidopsis mutants deficient for the Ca2+-permeable channels MCA1 and ANN1 is decreased by 40%. This suggests that MCA1 and ANN1 contribute to the absorption of U in different zones and cell layers of the root. Together, our results describe for the first time the involvement of Ca2+-permeable cation channels in the cellular uptake of U.
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Affiliation(s)
- Manon C M Sarthou
- Univ. Grenoble Alpes, INRAE, CEA, CNRS, IRIG, LPCV, 38000 Grenoble, France
| | - Fabienne Devime
- Univ. Grenoble Alpes, INRAE, CEA, CNRS, IRIG, LPCV, 38000 Grenoble, France
| | - Célia Baggio
- Univ. Grenoble Alpes, INRAE, CEA, CNRS, IRIG, LPCV, 38000 Grenoble, France
| | - Sylvie Figuet
- Univ. Grenoble Alpes, INRAE, CEA, CNRS, IRIG, LPCV, 38000 Grenoble, France
| | - Claude Alban
- Univ. Grenoble Alpes, INRAE, CEA, CNRS, IRIG, LPCV, 38000 Grenoble, France
| | | | - Stéphane Ravanel
- Univ. Grenoble Alpes, INRAE, CEA, CNRS, IRIG, LPCV, 38000 Grenoble, France.
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7
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Revel B, Catty P, Ravanel S, Bourguignon J, Alban C. High-affinity iron and calcium transport pathways are involved in U(VI) uptake in the budding yeast Saccharomyces cerevisiae. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126894. [PMID: 34416697 DOI: 10.1016/j.jhazmat.2021.126894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/20/2021] [Accepted: 08/10/2021] [Indexed: 06/13/2023]
Abstract
Uranium (U) is a naturally-occurring radionuclide that is toxic for all living organisms. To date, the mechanisms of U uptake are far from being understood. Here we provide a direct characterization of the transport machineries capable of transporting U, using the yeast Saccharomyces cerevisiae as a unicellular eukaryote model. First, we evidenced a metabolism-dependent U transport in yeast. Then, competition experiments with essential metals allowed us to identify calcium, iron and copper entry pathways as potential routes for U uptake. The analysis of various metal transport mutants revealed that mutant affected in calcium (mid1Δ and cch1Δ) and Fe(III) (ftr1Δ) transport, exhibited highly reduced U uptake rates and accumulation, demonstrating the implication of the calcium channel Mid1/Cch1 and the iron permease Ftr1 in U uptake. Finally, expression of the Mid1 gene into the mid1Δ mutant restored U uptake levels of the wild type strain, underscoring the central role of the Mid1/Cch1 calcium channel in U absorption process in yeast. Our results also open up the opportunity for rapid screening of U-transporter candidates by functional expression in yeast, before their validation in more complex higher eukaryote model systems.
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Affiliation(s)
- Benoît Revel
- Univ. Grenoble Alpes, CEA, INRAE, CNRS, IRIG, LPCV, 38000 Grenoble, France
| | - Patrice Catty
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, LCBM, 38000 Grenoble, France
| | - Stéphane Ravanel
- Univ. Grenoble Alpes, CEA, INRAE, CNRS, IRIG, LPCV, 38000 Grenoble, France
| | | | - Claude Alban
- Univ. Grenoble Alpes, CEA, INRAE, CNRS, IRIG, LPCV, 38000 Grenoble, France.
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8
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Jessat J, Sachs S, Moll H, John W, Steudtner R, Hübner R, Bok F, Stumpf T. Bioassociation of U(VI) and Eu(III) by Plant ( Brassica napus) Suspension Cell Cultures-A Spectroscopic Investigation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:6718-6728. [PMID: 33929840 DOI: 10.1021/acs.est.0c05881] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this study, we investigated the interaction of U(VI) and Eu(III) with Brassica napus suspension plant cells as a model system. Concentration-dependent (0-200 μM) bioassociation experiments showed that more than 75% of U(VI) and Eu(III) were immobilized by the cells. In addition to this phenomenon, time-dependent studies for 1 to 72 h of exposure showed a multistage bioassociation process for cells that were exposed to 200 μM U(VI), where, after initial immobilization of U(VI) within 1 h of exposure, it was released back into the culture medium starting within 24 h. A remobilization to this extent has not been previously observed. The MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay was used to correlate the bioassociation behavior of Eu and U with the cell vitality. Speciation studies by spectroscopy and in silico methods highlighted various U and Eu species over the course of exposure. We were able to observe a new U species, which emerged simultaneously with the remobilization of U back into the solution, which we assume to be a U(VI) phosphate species. Thus, the interaction of U(VI) and Eu(III) with released plant metabolites could be concluded.
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Affiliation(s)
- Jenny Jessat
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Susanne Sachs
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Henry Moll
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Warren John
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Robin Steudtner
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - René Hübner
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Frank Bok
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Thorsten Stumpf
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
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9
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Rajabi F, Jessat J, Garimella JN, Bok F, Steudtner R, Stumpf T, Sachs S. Uranium(VI) toxicity in tobacco BY-2 cell suspension culture - A physiological study. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 211:111883. [PMID: 33454591 DOI: 10.1016/j.ecoenv.2020.111883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/14/2020] [Accepted: 12/28/2020] [Indexed: 06/12/2023]
Abstract
For the first time, the physiological and cellular responses of Nicotiana tabacum (BY-2) cells to uranium (U) as an abiotic stressor were studied using a multi-analytic approach that combined biochemical analysis, thermodynamic modeling and spectroscopic studies. The goal of this investigation was to determine the U threshold toxicity in tobacco BY-2 cells, the influence of U on the homeostasis of micro-macro essential nutrients, as well as the effect of Fe starvation on U bioassociation in cultured BY-2 cells. Our findings demonstrated that U interferes with the homeostasis of essential elements. The interaction of U with BY-2 cells confirmed both time- and concentration-dependent kinetics. Under Fe deficiency, a reduced level of U was detected in the cells compared to Fe-sufficient conditions. Interestingly, blocking the Ca channels with gadolinium chloride caused a decrease in U concentration in the BY-2 cells. Spectroscopic studies evidenced changes in the U speciation in the culture media with increasing exposure time under both Fe-sufficient and deficient conditions, leading us to conclude that different stress response reactions are related to Fe metabolism. Moreover, it is suggested that U toxicity in BY-2 cells is highly dependent on the existence of other micro-macro elements as shown by negative synergistic effects of U and Fe on cell viability.
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Affiliation(s)
- Fatemeh Rajabi
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Jenny Jessat
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Jawaharlal Nehru Garimella
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Frank Bok
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Robin Steudtner
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Thorsten Stumpf
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Susanne Sachs
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany.
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