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Garraud J, Plihon H, Capiaux H, Le Guern C, Mench M, Lebeau T. Drivers to improve metal(loid) phytoextraction with a focus on microbial degradation of dissolved organic matter in soils. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 26:63-81. [PMID: 37303191 DOI: 10.1080/15226514.2023.2221740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Bioaugmentation of soils can increase the mobilization of metal(loid)s from the soil-bearing phases. However, once desorbed, these metal(loid)s are mostly complexed to the dissolved organic matter (DOM) in the soil solution, which can restrict their availability to plants (roots mainly taking up the free forms) and then the phytoextraction performances. Firstly the main drivers influencing phytoextraction are reminded, then the review focuses on the DOM role. After having reminding the origin, the chemical structure and the lability of DOM, the pool of stable DOM (the most abundant in the soil) most involved in the complexation of metal(loid)s is addressed in particular by focusing on carboxylic and/or phenolic groups and factors controlling metal(loid) complexation with DOM. Finally, this review addresses the ability of microorganisms to degrade metal(loid)-DOM complexes as an additional lever for increasing the pool of free metal(loid) ions, and then phytoextraction performances, and details the origin of microorganisms and how they are selected. The development of innovative processes including the use of these DOM-degrading microorganisms is proposed in perspectives.
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Affiliation(s)
- Justine Garraud
- Nantes Université, Université d'Angers, Le Mans Université, CNRS, UMR 6112, Laboratoire de Planétologie et Géosciences, Nantes, France
| | - Hélène Plihon
- Nantes Université, Université d'Angers, Le Mans Université, CNRS, UMR 6112, Laboratoire de Planétologie et Géosciences, Nantes, France
| | - Hervé Capiaux
- Nantes Université, Université d'Angers, Le Mans Université, CNRS, UMR 6112, Laboratoire de Planétologie et Géosciences, Nantes, France
| | | | | | - Thierry Lebeau
- Nantes Université, Université d'Angers, Le Mans Université, CNRS, UMR 6112, Laboratoire de Planétologie et Géosciences, Nantes, France
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Emmeline D, Alexandra L, Hervé C, Pierre G, Jean-Yves C, Thierry L. Effect of Pseudomonas putida-producing pyoverdine on copper uptake by Helianthus annuus cultivated on vineyard soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 809:152113. [PMID: 34875330 DOI: 10.1016/j.scitotenv.2021.152113] [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: 08/04/2021] [Revised: 11/27/2021] [Accepted: 11/27/2021] [Indexed: 06/13/2023]
Abstract
Bioaugmentation-assisted phytoextraction was used to reduce the Cu load in vineyard soils. While performance is usually the endpoint of such studies, here we identified some mechanisms underlying Cu soil to plant transfer, particularly the role of siderophores in the extraction of Cu from the soil-bearing phases and its phytoavailability. Carbonated vs. non‑carbonated vineyard soils were cultivated with sunflower in rhizoboxes bioaugmented with Pseudomonas putida. gfp-Tagged P. putida was monitored in the soil and pyoverdine (Pvd), Cu, Fe, Mn, and Zn were measured in the soil solution. Trace elements (TE) were analysed in the roots and shoots. Plant growth and nutritional status were also measured. With bioaugmentation, the concentration of total Cu (vs. Cu2+) in the soil solution increased (decreased) by a factor of 1.6 to 2.6 (7 to 13) depending on the soil. The almost 1:1 relationship between the excess of Fe + Cu mobilized from the solid phase and the amount of Pvd in the soil solution in bioaugmented treatments suggests that Pvd mobilized Fe and Cu mainly by ligand-controlled dissolution via a 1:1 metal-Pvd complex. Bioaugmentation increased the Cu concentration by 17% in the shoots and by 93% in the roots, and by 30% to 60% the sunflower shoot biomass leading to an increase in the amount of Cu phytoextracted by up to 87%. The amount of Fe, Mn, Zn, and P also increased in the roots and shoots. Contrary to what was expected, carbonated soil did not increase the mobilization of TE. Our results showed that bioaugmentation increased phytoextraction, and its performance can be further improved by promoting the dissociation of Pvd-Cu complex in the solution at the soil-root interface.
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Affiliation(s)
- D'Incau Emmeline
- LPG, UMR 6112 CNRS-Université de Nantes, BP 92208, 44322 Nantes cedex 3, France
| | - Lépinay Alexandra
- OSUNA, UMS 3281 CNRS-Université de Nantes, BP 92208, 44322 Nantes cedex 3, France
| | - Capiaux Hervé
- LPG, UMR 6112 CNRS-Université de Nantes, BP 92208, 44322 Nantes cedex 3, France; OSUNA, UMS 3281 CNRS-Université de Nantes, BP 92208, 44322 Nantes cedex 3, France
| | - Gaudin Pierre
- LPG, UMR 6112 CNRS-Université de Nantes, BP 92208, 44322 Nantes cedex 3, France; OSUNA, UMS 3281 CNRS-Université de Nantes, BP 92208, 44322 Nantes cedex 3, France
| | - Cornu Jean-Yves
- ISPA, Bordeaux Sciences Agro, INRA, 33140 Villenave d'Ornon, France
| | - Lebeau Thierry
- LPG, UMR 6112 CNRS-Université de Nantes, BP 92208, 44322 Nantes cedex 3, France; OSUNA, UMS 3281 CNRS-Université de Nantes, BP 92208, 44322 Nantes cedex 3, France.
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Jalali J, Gaudin P, Capiaux H, Ammar E, Lebeau T. Isolation and screening of indigenous bacteria from phosphogypsum-contaminated soils for their potential in promoting plant growth and trace elements mobilization. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 260:110063. [PMID: 32090810 DOI: 10.1016/j.jenvman.2020.110063] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 12/03/2019] [Accepted: 01/01/2020] [Indexed: 06/10/2023]
Abstract
Bacteria isolated from soils in the vicinity of phosphogypsum (PG) stockpiles were studied for their potential use in bioaugmentation-assisted phytoextraction. Quick, miniaturized biochemical tests were performed in the presence of metal trace elements (MTE), including rare earth elements (Cd, Sr, Ce, La, Nd and Y), corresponding to their bioavailable concentrations in PG. The intention herein was to assess the capacity of bacteria to: i) grow in PG; ii) produce indole acetic acid and ACC deaminase to promote plant growth and reduce stress; and iii) produce siderophores, including pyoverdine, to mobilize MTE. Results showed that even at maximum PG concentration (10 g/L and pH 3.40), 7 out of 32 isolates were able to grow. The biochemical tests showed differences in the presence or absence of MTE. The presence of MTE seems to promote the production of IAA by a factor of 3.25. On the contrary, it inhibits ACC deaminase and siderophore production, including pyoverdine. According to a scoring method applied, the two most efficient isolates exhibiting maximum metabolite production were identified as Bacillus sp.
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Affiliation(s)
- Jihen Jalali
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322, Nantes Cedex 3, France; Research Unit on Coastal and Urban Environments, University of Sfax, National Engineering School of Sfax, BP 1173, 3038, Sfax, Tunisia; Tunisian Chemical Group, M'Dhilla-Gafsa Factory, B.P. 215, 2100, Gafsa, Tunisia
| | - Pierre Gaudin
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322, Nantes Cedex 3, France
| | - Hervé Capiaux
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322, Nantes Cedex 3, France; Platform for the Molecular Analyses of Biodiversity - Environment, Bioengineering IUT, 85035, La Roche-sur-Yon, France
| | - Emna Ammar
- Research Unit on Coastal and Urban Environments, University of Sfax, National Engineering School of Sfax, BP 1173, 3038, Sfax, Tunisia
| | - Thierry Lebeau
- Laboratory of Planetology and Geodynamics of Nantes, UMR 6112 CNRS, Faculty of Sciences and Technology of Nantes, BP 92208, 44322, Nantes Cedex 3, France.
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Cornu JY, Huguenot D, Jézéquel K, Lollier M, Lebeau T. Bioremediation of copper-contaminated soils by bacteria. World J Microbiol Biotechnol 2017; 33:26. [PMID: 28044274 DOI: 10.1007/s11274-016-2191-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 12/19/2016] [Indexed: 11/24/2022]
Abstract
Although copper (Cu) is an essential micronutrient for all living organisms, it can be toxic at low concentrations. Its beneficial effects are therefore only observed for a narrow range of concentrations. Anthropogenic activities such as fungicide spraying and mining have resulted in the Cu contamination of environmental compartments (soil, water and sediment) at levels sometimes exceeding the toxicity threshold. This review focuses on the bioremediation of copper-contaminated soils. The mechanisms by which microorganisms, and in particular bacteria, can mobilize or immobilize Cu in soils are described and the corresponding bioremediation strategies-of varying levels of maturity-are addressed: (i) bioleaching as a process for the ex situ recovery of Cu from Cu-bearing solids, (ii) bioimmobilization to limit the in situ leaching of Cu into groundwater and (iii) bioaugmentation-assisted phytoextraction as an innovative process for in situ enhancement of Cu removal from soil. For each application, the specific conditions required to achieve the desired effect and the practical methods for control of the microbial processes were specified.
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Affiliation(s)
- Jean-Yves Cornu
- ISPA, INRA, Bordeaux Sciences Agro, 33140, Villenave d'Ornon, France
| | - David Huguenot
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454, Marne-la-Vallée, France
| | - Karine Jézéquel
- Université de Haute Alsace, EA 3991 LVBE (Laboratoire Vigne Biotechnologies et Environnement), Equipe Dépollution Biologique des Sols, 33 rue de Herrlisheim, BP 50568, 68008, Colmar cedex, France
| | - Marc Lollier
- Université de Haute Alsace, EA 3991 LVBE (Laboratoire Vigne Biotechnologies et Environnement), Equipe Dépollution Biologique des Sols, 33 rue de Herrlisheim, BP 50568, 68008, Colmar cedex, France
| | - Thierry Lebeau
- Université de Nantes, UMR 6112 LPG-Nantes (Laboratoire de Planétologie et Géodynamique de Nantes), 2 rue de la Houssinière, BP 92208, 44322, Nantes cedex 3, France.
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Kurth C, Kage H, Nett M. Siderophores as molecular tools in medical and environmental applications. Org Biomol Chem 2016; 14:8212-27. [PMID: 27492756 DOI: 10.1039/c6ob01400c] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Almost all life forms depend on iron as an essential micronutrient that is needed for electron transport and metabolic processes. Siderophores are low-molecular-weight iron chelators that safeguard the supply of this important metal to bacteria, fungi and graminaceous plants. Although animals and the majority of plants do not utilise siderophores and have alternative means of iron acquisition, siderophores have found important clinical and agricultural applications. In this review, we will highlight the different uses of these iron-chelating molecules.
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Affiliation(s)
- Colette Kurth
- Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Adolf-Reichwein-Str. 23, D-07745 Jena, Germany
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