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Golubev S, Rasterkovskaya M, Sungurtseva I, Burov A, Muratova A. Phenanthrene-Degrading and Nickel-Resistant Neorhizobium Strain Isolated from Hydrocarbon-Contaminated Rhizosphere of Medicago sativa L. Microorganisms 2024; 12:1586. [PMID: 39203428 PMCID: PMC11356111 DOI: 10.3390/microorganisms12081586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2024] [Revised: 07/24/2024] [Accepted: 08/01/2024] [Indexed: 09/03/2024] Open
Abstract
Pollutant degradation and heavy-metal resistance may be important features of the rhizobia, making them promising agents for environment cleanup biotechnology. The degradation of phenanthrene, a three-ring polycyclic aromatic hydrocarbon (PAH), by the rhizobial strain Rsf11 isolated from the oil-polluted rhizosphere of alfalfa and the influence of nickel ions on this process were studied. On the basis of whole-genome and polyphasic taxonomy, the bacterium Rsf11 represent a novel species of the genus Neorhizobium, so the name Neorhizobium phenanthreniclasticum sp. nov. was proposed. Analysis of phenanthrene degradation by the Rsf1 strain revealed 1-hydroxy-2-naphthoic acid as the key intermediate and the activity of two enzymes apparently involved in PAH degradation. It was also shown that the nickel resistance of Rsf11 was connected with the extracellular adsorption of metal by EPS. The joint presence of phenanthrene and nickel in the medium reduced the degradation of PAH by the microorganism, apparently due to the inhibition of microbial growth but not due to the inhibition of the activity of the PAH degradation enzymes. Genes potentially involved in PAH catabolism and nickel resistance were discovered in the microorganism studied. N. phenanthreniclasticum strain Rsf11 can be considered as a promising candidate for use in the bioremediation of mixed PAH-heavy-metal contamination.
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Affiliation(s)
| | | | | | | | - Anna Muratova
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Saratov Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), Saratov 410049, Russia; (S.G.); (M.R.); (I.S.); (A.B.)
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Bourles A, Pierre G, Amir H, Le Floc’h A, Chalkiadakis E, Médevielle V, Jourand P, Michaud P, Burtet-Sarramégna V, Guentas L. The cepacian-like exopolysaccharide of Paraburkholderia ultramafica STM10279 T enhances growth and metal adaptation of Tetraria comosa on New Caledonian ultramafic soil. FRONTIERS IN PLANT SCIENCE 2024; 15:1349724. [PMID: 38903440 PMCID: PMC11188366 DOI: 10.3389/fpls.2024.1349724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 05/13/2024] [Indexed: 06/22/2024]
Abstract
Paraburkholderia ultramafica STM10279T is a metal-tolerant rhizobacterium that promotes plant growth. It was isolated from the roots of Tetraria arundinaceae, a pioneer endemic tropical herb growing on ultramafic soils in New Caledonia. We have recently shown that the main mechanism of metal tolerance of P. ultramafica is related to the production of an acidic exopolysaccharide (EPS). To explore the potential role of this EPS in the plant's environmental adaptation, we first elucidated its structure by employing a combination of chromatography and mass spectrometry techniques. These analyses revealed that the EPS is highly branched and composed of galactosyl (35.8%), glucosyl (33.2%), rhamnosyl (19.5%), mannosyl (7.2%), and glucuronosyl residues (4.4%), similar to the EPS of the Burkholderia cepacia complex known as cepacian. We subsequently conducted greenhouse experiments on Tetraria comosa plantlets inoculated with P. ultramafica or a solution of its EPS during transplanting onto ultramafic substrate. The data showed that the dry weight of T. comosa shoots was 2.5 times higher in the plants treated with the EPS compared to the unexposed plants. In addition, inductively coupled plasma-optical emission spectrometry (ICP-OES) analysis revealed that exposure to the EPS significantly increased Ca, Mg, K, and P uptake as well as K content in roots. In vitro experiments using the Pikovskaya method showed that the EPS was able to solubilize phosphorus. Consistent with the retention of metals in roots and a reduction in shoots, our data revealed a significant decrease in metal translocation factors (TFs) in the plants inoculated with the EPS. These results suggest a beneficial effect of the rhizobacterial EPS on plant growth and abiotic stress mitigation. In addition, the data suggest that the reduced levels of trace metals in plants exposed to P. ultramafica STM10279T are due to metal chelation by the EPS. Further investigations are needed to firmly demonstrate whether this EPS could be used as a biostimulant for plant growth and adaptation to ultramafic soils.
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Affiliation(s)
- Alexandre Bourles
- Institut de Sciences Exactes et Appliquées, Université de la Nouvelle-Calédonie, Noumea, New Caledonia
| | - Guillaume Pierre
- Institut Pascal, Université Clermont Auvergne, Centre National de la Recherche Scientifique (CNRS), Clermont Auvergne Institut National Polytechnique (INP), Clermont-Ferrand, France
- Institut Universitaire de France (IUF), Paris, France
| | - Hamid Amir
- Institut de Sciences Exactes et Appliquées, Université de la Nouvelle-Calédonie, Noumea, New Caledonia
| | - Alizée Le Floc’h
- Institut de Sciences Exactes et Appliquées, Université de la Nouvelle-Calédonie, Noumea, New Caledonia
| | | | - Valérie Médevielle
- Institut de Sciences Exactes et Appliquées, Université de la Nouvelle-Calédonie, Noumea, New Caledonia
| | - Philippe Jourand
- Institute of Research for Development (IRD), UMR Entropie, Université de la Réunion, Saint Denis, France
| | - Philippe Michaud
- Institut Pascal, Université Clermont Auvergne, Centre National de la Recherche Scientifique (CNRS), Clermont Auvergne Institut National Polytechnique (INP), Clermont-Ferrand, France
| | - Valérie Burtet-Sarramégna
- Institut de Sciences Exactes et Appliquées, Université de la Nouvelle-Calédonie, Noumea, New Caledonia
| | - Linda Guentas
- Institut de Sciences Exactes et Appliquées, Université de la Nouvelle-Calédonie, Noumea, New Caledonia
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Saharan BS, Chaudhary T, Mandal BS, Kumar D, Kumar R, Sadh PK, Duhan JS. Microbe-Plant Interactions Targeting Metal Stress: New Dimensions for Bioremediation Applications. J Xenobiot 2023; 13:252-269. [PMID: 37367495 DOI: 10.3390/jox13020019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/25/2023] [Accepted: 05/30/2023] [Indexed: 06/28/2023] Open
Abstract
In the age of industrialization, numerous non-biodegradable pollutants like plastics, HMs, polychlorinated biphenyls, and various agrochemicals are a serious concern. These harmful toxic compounds pose a serious threat to food security because they enter the food chain through agricultural land and water. Physical and chemical techniques are used to remove HMs from contaminated soil. Microbial-metal interaction, a novel but underutilized strategy, might be used to lessen the stress caused by metals on plants. For reclaiming areas with high levels of heavy metal contamination, bioremediation is effective and environmentally friendly. In this study, the mechanism of action of endophytic bacteria that promote plant growth and survival in polluted soils-known as heavy metal-tolerant plant growth-promoting (HMT-PGP) microorganisms-and their function in the control of plant metal stress are examined. Numerous bacterial species, such as Arthrobacter, Bacillus, Burkholderia, Pseudomonas, and Stenotrophomonas, as well as a few fungi, such as Mucor, Talaromyces, Trichoderma, and Archaea, such as Natrialba and Haloferax, have also been identified as potent bioresources for biological clean-up. In this study, we additionally emphasize the role of plant growth-promoting bacteria (PGPB) in supporting the economical and environmentally friendly bioremediation of heavy hazardous metals. This study also emphasizes future potential and constraints, integrated metabolomics approaches, and the use of nanoparticles in microbial bioremediation for HMs.
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Affiliation(s)
- Baljeet Singh Saharan
- Department of Microbiology, CCS Haryana Agricultural University, Hisar 125004, India
| | - Twinkle Chaudhary
- Department of Animal Biotechnology, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar 125004, India
| | - Balwan Singh Mandal
- Department of Forestry, CCS Haryana Agricultural University, Hisar 125004, India
| | - Dharmender Kumar
- Department of Biotechnology, Deenbandhu Chhotu Ram University of Science and Technology, Murthal 131039, India
| | - Ravinder Kumar
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa 125055, India
| | - Pardeep Kumar Sadh
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa 125055, India
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Vincent B, Hannibal L, Galiana A, Ducousso M, Jourand P. Respective and combined roles of rhizobia and ectomycorrhizal fungi in the plant growth, symbiotic efficiency, nutrients and metals contents of a leguminous tree species growing on ultramafic soils. Symbiosis 2022. [DOI: 10.1007/s13199-022-00850-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Edulamudi P, Antony Masilamani AJ, Vanga UR, Divi VRSG, Konada VM. Nickel tolerance and biosorption potential of rhizobia associated with horse gram [ Macrotyloma uniflorum (Lam.) Verdc.]. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2021; 23:1184-1190. [PMID: 33599156 DOI: 10.1080/15226514.2021.1884182] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The rhizobia isolated from root nodules of horse gram were screened for nickel (Ni) tolerance in vitro. The strain HGR-4 could tolerate 1000 µg g-1 of Ni. It was also observed that horse gram plants associated with HGR-4 have shown Ni stress tolerance in Ni amended soils up to a concentration of 100 µg g-1. In another experiment, the plants associated with HGR-4 have shown higher nodulation, nitrogen level, and leghaemoglobin content at 80 µg g-1 of Ni than control plants without HGR-4 inoculation. Analysis of biosorption potential of Ni in horse gram plants inoculated by the strain HGR-4 was done using atomic absorption spectroscopy revealed maximum biosorption in bacterial root nodules. Besides, there was a reduction in the content of the heavy metal in the soil samples which demonstrates a fair amount of heavy metal extraction and accumulation of Ni by rhizobia associated root nodules of the horse gram. This study demonstrates that the strain HGR-4 (GQ483457 Rhizobium sp. ATCC BAA-2335) could be a potential source for phytoextraction of Ni contaminated soils upon its association with horse gram. The study could be of use in phytoremediation of metal (Ni) contaminated soils in the future. Novelty statement: The phytoremediation of nickel (Ni) using of rhizobia associated with horse gram remains unevaluated till now. Horse gram associated with rhizobia could produce nodules and fix nitrogen even in Ni amended soils. The biosorption potential of the rhizobial strains was analyzed from both root nodules and soil. These findings imply that horse gram plants associated with these rhizobial strains could be used to remediate Ni metal in contaminated soils.
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Affiliation(s)
- Prabhavati Edulamudi
- Department of Botany and Microbiology, Acharya Nagarjuna University, Guntur, India
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Hao X, Zhu J, Rensing C, Liu Y, Gao S, Chen W, Huang Q, Liu YR. Recent advances in exploring the heavy metal(loid) resistant microbiome. Comput Struct Biotechnol J 2020; 19:94-109. [PMID: 33425244 PMCID: PMC7771044 DOI: 10.1016/j.csbj.2020.12.006] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 12/03/2020] [Accepted: 12/05/2020] [Indexed: 12/18/2022] Open
Abstract
Heavy metal(loid)s exert selective pressure on microbial communities and evolution of metal resistance determinants. Despite increasing knowledge concerning the impact of metal pollution on microbial community and ecological function, it is still a challenge to identify a consistent pattern of microbial community composition along gradients of elevated metal(loid)s in natural environments. Further, our current knowledge of the microbial metal resistome at the community level has been lagging behind compared to the state-of-the-art genetic profiling of bacterial metal resistance mechanisms in a pure culture system. This review provides an overview of the core metal resistant microbiome, development of metal resistance strategies, and potential factors driving the diversity and distribution of metal resistance determinants in natural environments. The impacts of biotic factors regulating the bacterial metal resistome are highlighted. We finally discuss the advances in multiple technologies, research challenges, and future directions to better understand the interface of the environmental microbiome with the metal resistome. This review aims to highlight the diversity and wide distribution of heavy metal(loid)s and their corresponding resistance determinants, helping to better understand the resistance strategy at the community level.
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Affiliation(s)
- Xiuli Hao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China
- Corresponding authors at: State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China.
| | - Jiaojiao Zhu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Christopher Rensing
- Institute of Environmental Microbiology, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Ying Liu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Shenghan Gao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenli Chen
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qiaoyun Huang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China
| | - Yu-Rong Liu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
- Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China
- Corresponding authors at: State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China.
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Vincent B, Juillot F, Fritsch E, Klonowska A, Gerbert N, Acherar S, Grangeteau C, Hannibal L, Galiana A, Ducousso M, Jourand P. A leguminous species exploiting alpha- and beta-rhizobia for adaptation to ultramafic and volcano-sedimentary soils: an endemic Acacia spirorbis model from New Caledonia. FEMS Microbiol Ecol 2019; 95:5524360. [PMID: 31247638 DOI: 10.1093/femsec/fiz099] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/25/2019] [Indexed: 10/26/2022] Open
Abstract
Acacia spirorbis subsp. spirorbis Labill. is a widespread tree legume endemic to New Caledonia that grows in ultramafic (UF) and volcano-sedimentary (VS) soils. The aim of this study was to assess the symbiotic promiscuity of A. spirorbis with nodulating and nitrogen-fixing rhizobia in harsh edaphic conditions. Forty bacterial strains were isolated from root nodules and characterized through (i) multilocus sequence analyses, (ii) symbiotic efficiency and (iii) tolerance to metals. Notably, 32.5% of the rhizobia belonged to the Paraburkholderia genus and were only found in UF soils. The remaining 67.5%, isolated from both UF and VS soils, belonged to the Bradyrhizobium genus. Strains of the Paraburkholderia genus showed significantly higher nitrogen-fixing capacities than those of Bradyrhizobium genus. Strains of the two genera isolated from UF soils showed high metal tolerance and the respective genes occurred in 50% of strains. This is the first report of both alpha- and beta-rhizobia strains associated to an Acacia species adapted to UF and VS soils. Our findings suggest that A. spirorbis is an adaptive plant that establishes symbioses with whatever rhizobia is present in the soil, thus enabling the colonization of contrasted ecosystems.
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Affiliation(s)
- Bryan Vincent
- IRD, LSTM UMR040, TA A-82/J, Campus International de Baillarguet, 34398 Montpellier cedex 5, France
| | - Farid Juillot
- IRD, IMPMC UMR206, 98848 Nouméa Cedex, New Caledonia
| | | | - Agnieszka Klonowska
- IRD, Cirad, Univ. Montpellier, Interactions Plantes Microorganismes Environnement (IPME), 34394 Montpellier, France
| | - Noëmie Gerbert
- IRD, LSTM UMR040, TA A-82/J, Campus International de Baillarguet, 34398 Montpellier cedex 5, France
| | - Sarah Acherar
- IRD, LSTM UMR040, TA A-82/J, Campus International de Baillarguet, 34398 Montpellier cedex 5, France
| | - Cedric Grangeteau
- IRD, LSTM UMR040, TA A-82/J, Campus International de Baillarguet, 34398 Montpellier cedex 5, France
| | - Laure Hannibal
- IRD, LSTM UMR040, TA A-82/J, Campus International de Baillarguet, 34398 Montpellier cedex 5, France
| | - Antoine Galiana
- CIRAD, LSTM UMR082, TA A-82/J, Campus International de Baillarguet, 34398 Montpellier cedex 5, France
| | - Marc Ducousso
- CIRAD, LSTM UMR082, TA A-82/J, Campus International de Baillarguet, 34398 Montpellier cedex 5, France
| | - Philippe Jourand
- IRD, LSTM UMR040, TA A-82/J, Campus International de Baillarguet, 34398 Montpellier cedex 5, France
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Costa FS, Macedo MWFS, Araújo ACM, Rodrigues CA, Kuramae EE, de Barros Alcanfor SK, Pessoa-Filho M, Barreto CC. Assessing nickel tolerance of bacteria isolated from serpentine soils. Braz J Microbiol 2019; 50:705-713. [PMID: 31297747 DOI: 10.1007/s42770-019-00111-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 06/11/2019] [Indexed: 10/26/2022] Open
Abstract
Serpentine soils present unique characteristics such as a low Ca/Mg ratio, low concentration of nutrients, and a high concentration of heavy metals, especially nickel. Soil bacterial isolates from an ultramafic complex located in the tropical savanna known as the Brazilian Cerrado were studied. Nickel-tolerant bacteria were obtained, and their ability to remove nickel from a culture medium was assessed. Bacterial isolates presented higher tolerance to nickel salts than previously reported for bacteria obtained from serpentine environments in other regions of the world. In addition, the quantification of nickel in cell pellets indicated that at least four isolates may adsorb soluble forms of nickel. It is expected that information gathered in this study will support future efforts to exploit serpentine soil bacteria for biotechnological processes involving nickel decontamination from environmental samples.
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Affiliation(s)
- Flávio Silva Costa
- Graduate Program in Genomic Sciences and Biotechnology, Universidade Católica de Brasília, SGAN 916, Avenida W5, Brasilia, 70790-160, Brazil.,Institute of Microbiology, Friedrich-Schiller-Universität Jena, Neugasse 25, 07743, Jena, Germany
| | - Maria Wanna Figueiredo Sena Macedo
- Graduate Program in Genomic Sciences and Biotechnology, Universidade Católica de Brasília, SGAN 916, Avenida W5, Brasilia, 70790-160, Brazil
| | - Ana Carolina Moreira Araújo
- Graduate Program in Genomic Sciences and Biotechnology, Universidade Católica de Brasília, SGAN 916, Avenida W5, Brasilia, 70790-160, Brazil
| | - Cassimira Albuquerque Rodrigues
- Graduate Program in Genomic Sciences and Biotechnology, Universidade Católica de Brasília, SGAN 916, Avenida W5, Brasilia, 70790-160, Brazil
| | - Eiko Eurya Kuramae
- Department of Microbial Ecology, Nederlands Instituut vor Ecologie (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB, Wageningen, The Netherlands
| | | | - Marco Pessoa-Filho
- Embrapa Cerrados, BR 020, Km 18, PO Box 08223, Brasilia, 73310-970, Brazil
| | - Cristine Chaves Barreto
- Graduate Program in Genomic Sciences and Biotechnology, Universidade Católica de Brasília, SGAN 916, Avenida W5, Brasilia, 70790-160, Brazil.
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Fagorzi C, Checcucci A, diCenzo GC, Debiec-Andrzejewska K, Dziewit L, Pini F, Mengoni A. Harnessing Rhizobia to Improve Heavy-Metal Phytoremediation by Legumes. Genes (Basel) 2018; 9:genes9110542. [PMID: 30413093 PMCID: PMC6266702 DOI: 10.3390/genes9110542] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/05/2018] [Accepted: 11/06/2018] [Indexed: 12/15/2022] Open
Abstract
Rhizobia are bacteria that can form symbiotic associations with plants of the Fabaceae family, during which they reduce atmospheric di-nitrogen to ammonia. The symbiosis between rhizobia and leguminous plants is a fundamental contributor to nitrogen cycling in natural and agricultural ecosystems. Rhizobial microsymbionts are a major reason why legumes can colonize marginal lands and nitrogen-deficient soils. Several leguminous species have been found in metal-contaminated areas, and they often harbor metal-tolerant rhizobia. In recent years, there have been numerous efforts and discoveries related to the genetic determinants of metal resistance by rhizobia, and on the effectiveness of such rhizobia to increase the metal tolerance of host plants. Here, we review the main findings on the metal resistance of rhizobia: the physiological role, evolution, and genetic determinants, and the potential to use native and genetically-manipulated rhizobia as inoculants for legumes in phytoremediation practices.
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Affiliation(s)
- Camilla Fagorzi
- Department of Biology, University of Florence, Via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy.
| | - Alice Checcucci
- Department of Biology, University of Florence, Via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy.
| | - George C diCenzo
- Department of Biology, University of Florence, Via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy.
| | - Klaudia Debiec-Andrzejewska
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
| | - Lukasz Dziewit
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
| | - Francesco Pini
- Department of Agri-food Production and Environmental Science, University of Florence, 50144 Florence, Italy.
| | - Alessio Mengoni
- Department of Biology, University of Florence, Via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy.
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Deng S, Ke T, Li L, Cai S, Zhou Y, Liu Y, Guo L, Chen L, Zhang D. Impacts of environmental factors on the whole microbial communities in the rhizosphere of a metal-tolerant plant: Elsholtzia haichowensis Sun. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 237:1088-1097. [PMID: 29153474 DOI: 10.1016/j.envpol.2017.11.037] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/08/2017] [Accepted: 11/09/2017] [Indexed: 05/08/2023]
Abstract
Rhizospheric microbes play important roles in plant growth and heavy metals (HMs) transformation, possessing great potential for the successful phytoremediation of environmental pollutants. In the present study, the rhizosphere of Elsholtzia haichowensis Sun was comprehensively studied to uncover the influence of environmental factors (EFs) on the whole microbial communities including bacteria, fungi and archaea, via quantitative polymerase chain reaction (qPCR) and high-throughput sequencing. By analyzing molecular ecological network and multivariate regression trees (MRT), we evaluated the distinct impacts of 37 EFs on soil microbial community. Of them, soil pH, HMs, soil texture and nitrogen were identified as the most influencing factors, and their roles varied across different domains. Soil pH was the main environmental variable on archaeal and bacterial community but not fungi, explaining 25.7%, 46.5% and 40.7% variation of bacterial taxonomic composition, archaeal taxonomic composition and a-diversity, respectively. HMs showed important roles in driving the whole microbial community and explained the major variation in different domains. Nitrogen (NH4-N, NO3-N, NO2-N and TN) explained 47.3% variation of microbial population composition and 15.9% of archaeal taxonomic composition, demonstrating its influence in structuring the rhizospheric microbiome, particularly archaeal and bacterial community. Soil texture accounted for 10.2% variation of population composition, 28.9% of fungal taxonomic composition, 19.2% of fungal a-diversity and 7.8% of archaeal a-diversity. Rhizosphere only showed strong impacts on fungi and bacteria, accounting for 14.7% and 4.9% variation of fungal taxonomic composition and bacterial a-diversity. Spatial distance had stronger influence on bacteria and archaea than fungi, but not as significant as other EFs. For the first time, our study provides a complete insight into key influential EFs on rhizospheric microbes and how their roles vary across microbial domains, giving a hand for understanding the construction of microbial communities in rhizosphere.
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Affiliation(s)
- Songqiang Deng
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430079, PR China
| | - Tan Ke
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, PR China
| | - Longtai Li
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430079, PR China
| | - Shenwen Cai
- Department of Resources and Environment, Zunyi Normal College, Zunyi 563000, PR China
| | - Yuyue Zhou
- College of Life Sciences, Wuhan University, Wuhan 430079, PR China
| | - Yue Liu
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, PR China
| | - Limin Guo
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430079, PR China.
| | - Lanzhou Chen
- School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, PR China.
| | - Dayi Zhang
- School of Environment, Tsinghua University, Beijing 100084, PR China.
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11
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Rubio-Sanz L, Brito B, Palacios J. Analysis of metal tolerance in Rhizobium leguminosarum strains isolated from an ultramafic soil. FEMS Microbiol Lett 2018; 365:4813332. [DOI: 10.1093/femsle/fny010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 01/16/2018] [Indexed: 11/12/2022] Open
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Abstract
Phytoremediation is a promising technology that uses plants and their associated microbes to clean up contaminants from the environment. In recent years, phytoremediation assisted by plant growth-promoting bacteria (PGPB) has been highly touted for cleaning up toxic metals from soil. PGPB include rhizospheric bacteria, endophytic bacteria and the bacteria that facilitate phytoremediation by other means. This review provides information about the traits and mechanisms possessed by PGPB that improve plant metal tolerance and growth, and illustrate mechanisms responsible for plant metal accumulation/translocation in plants. Several recent examples of phytoremediation of metals facilitated by PGPB are reviewed. Although many encouraging results have been reported in the past years, there have also been numerous challenges encountered in phytoremediation in the field. To implement PGPB-assisted phytoremediation of metals in the natural environment, there is also a need to critically assess the ecological effects of PGPB, especially for those nonnative bacteria.
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Affiliation(s)
- Zhaoyu Kong
- School of Life Science, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, China.
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Waseem M, Ducousso M, Prin Y, Domergue O, Hannibal L, Majorel C, Jourand P, Galiana A. Ectomycorrhizal fungal diversity associated with endemic Tristaniopsis spp. (Myrtaceae) in ultramafic and volcano-sedimentary soils in New Caledonia. MYCORRHIZA 2017; 27:407-413. [PMID: 28091750 DOI: 10.1007/s00572-017-0761-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 01/04/2017] [Indexed: 06/06/2023]
Abstract
New Caledonian serpentine (ultramafic) soils contain high levels of toxic heavy metals, in particular nickel, (up to 20 g kg-1) and are deficient in essential elements like carbon, nitrogen and phosphorus while having a high magnesium/calcium ratio. Although previous studies showed that ectomycorrhizal symbioses could play an important role in the adaptation of the endemic plants to ultramafic soils (FEMS Microbiol Ecol 72:238-49, 2010), none of them have compared the diversity of microbial communities from ultramafic vs non-ultramafic soils in New Caledonia. We explored the impact of edaphic characteristics on the diversity of ectomycorrhizal (ECM) fungi associated with different endemic species of Tristaniopsis (Myrtaceae) growing under contrasting soil conditions in the natural ecosystems of New Caledonia. ECM root tips were thus sampled from two different ultramafic sites (Koniambo massif and Desmazures forest) vs two volcano-sedimentary ones (Arama and Mont Ninndo). The molecular characterization of the ECM fungi through partial sequencing of the ITS rRNA gene revealed the presence of different dominant fungal genera including, both soil types combined, Cortinarius (36.1%), Pisolithus (18.5%), Russula (13.4%), Heliotales (8.2%) and Boletellus (7.2%). A high diversity of ECM taxa associated with Tristaniopsis species was found in both ultramafic and volcano-sedimentary soils but no significant differences in ECM genera distribution were observed between both soil types. No link could be established between the phylogenetic clustering of ECM taxa and their soil type origin, thus suggesting a possible functional-rather than taxonomical-adaptation of ECM fungal communities to ultramafic soils.
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Affiliation(s)
- Muhammad Waseem
- CIRAD, UMR113 CIRAD/INRA/IRD/SupAgro/UM, Laboratoire des Symbioses Tropicales et Méditerranéennes, Campus International de Baillarguet, TA A-82/J, F-34398 Cedex 5, Montpellier, France
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Marc Ducousso
- CIRAD, UMR113 CIRAD/INRA/IRD/SupAgro/UM, Laboratoire des Symbioses Tropicales et Méditerranéennes, Campus International de Baillarguet, TA A-82/J, F-34398 Cedex 5, Montpellier, France
| | - Yves Prin
- CIRAD, UMR113 CIRAD/INRA/IRD/SupAgro/UM, Laboratoire des Symbioses Tropicales et Méditerranéennes, Campus International de Baillarguet, TA A-82/J, F-34398 Cedex 5, Montpellier, France
| | - Odile Domergue
- INRA, UMR113 CIRAD/INRA/IRD/SupAgro/UM, Laboratoire des Symbioses Tropicales et Méditerranéennes, Campus International de Baillarguet, TA A-82/J, F-34398 Cedex 5, Montpellier, France
| | - Laure Hannibal
- IRD, UMR113 CIRAD/INRA/IRD/SupAgro/UM, Laboratoire des Symbioses Tropicales et Méditerranéennes, F-98848, Noumea Cedex, New Caledonia
| | - Clarisse Majorel
- IRD, UMR113 CIRAD/INRA/IRD/SupAgro/UM, Laboratoire des Symbioses Tropicales et Méditerranéennes, F-98848, Noumea Cedex, New Caledonia
| | - Philippe Jourand
- IRD, UMR113 CIRAD/INRA/IRD/SupAgro/UM, Laboratoire des Symbioses Tropicales et Méditerranéennes, F-98848, Noumea Cedex, New Caledonia
| | - Antoine Galiana
- CIRAD, UMR113 CIRAD/INRA/IRD/SupAgro/UM, Laboratoire des Symbioses Tropicales et Méditerranéennes, Campus International de Baillarguet, TA A-82/J, F-34398 Cedex 5, Montpellier, France.
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Liang J, Zhang M, Lu M, Li Z, Shen X, Chou M, Wei G. Functional characterization of a csoR-cueA divergon in Bradyrhizobium liaoningense CCNWSX0360, involved in copper, zinc and cadmium cotolerance. Sci Rep 2016; 6:35155. [PMID: 27725778 PMCID: PMC5057107 DOI: 10.1038/srep35155] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 09/26/2016] [Indexed: 12/14/2022] Open
Abstract
Random mutagenesis in a symbiotic nitrogen-fixing Bradyrhizobium liaoningense CCNWSX0360 (Bln0360) using Tn5 identified five copper (Cu) resistance-related genes. They were functionally sorted into three groups: transmembrane transport (cueA and tolC); oxidation (copA); and protection of the membrane barrier (lptE and ctpA). The gene cueA, together with the upstream csoR (Cu-sensitive operon repressor), constituted a csoR-cueA divergon which plays a crucial role in Cu homeostasis. Deletion of cueA decreased the Cu tolerance of cells, and complementation of this mutant restored comparable Cu resistance to that of the wild-type. Transcriptional and fusion expression analysis demonstrated that csoR-cueA divergon was up-regulated by both the monovalent Cu+ and divalent Zn2+/Cd2+, and negatively regulated by transcriptional repressor CsoR, via a bidirectional promoter. Deletion of csoR renders the cell hyper-resistant to Cu, Zn and Cd. Although predicted to encode a Cu transporting P-type ATPase (CueA), cueA also conferred resistance to zinc and cadmium; two putative N-MBDs (N-terminal metal binding domains) of CueA were required for the Cu/Zn/Cd tolerance. Moreover, cueA is needed for nodulation competitiveness of B. liaoningense in Cu rich conditions. Together, the results demonstrated a crucial role for the csoR-cueA divergon as a component of the multiple-metal resistance machinery in B. liaoningense.
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Affiliation(s)
- Jianqiang Liang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Mingzhe Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Mingmei Lu
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Zhefei Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Xihui Shen
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Minxia Chou
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Gehong Wei
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
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Porter SS, Chang PL, Conow CA, Dunham JP, Friesen ML. Association mapping reveals novel serpentine adaptation gene clusters in a population of symbiotic Mesorhizobium. ISME JOURNAL 2016; 11:248-262. [PMID: 27420027 PMCID: PMC5315480 DOI: 10.1038/ismej.2016.88] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Revised: 05/23/2016] [Accepted: 05/25/2016] [Indexed: 01/18/2023]
Abstract
The genetic variants that underlie microbial environmental adaptation are key components of models of microbial diversification. Characterizing adaptive variants and the pangenomic context in which they evolve remains a frontier in understanding how microbial diversity is generated. The genomics of rhizobium adaptation to contrasting soil environments is ecologically and agriculturally important because these bacteria are responsible for half of all current biologically fixed nitrogen, yet they live the majority of their lives in soil. Our study uses whole-genome sequencing to describe the pan-genome of a focal clade of wild mesorhizobia that show contrasting levels of nickel adaptation despite high relatedness (99.8% identity at 16S). We observe ecotypic specialization within an otherwise genomically cohesive population, rather than finding distinct specialized bacterial lineages in contrasting soil types. This finding supports recent reports that heterogeneous environments impose selection that maintains differentiation only at a small fraction of the genome. Our work further uses a genome-wide association study to propose candidate genes for nickel adaptation. Several candidates show homology to genetic systems involved in nickel tolerance and one cluster of candidates correlates perfectly with soil origin, which validates our approach of ascribing genomic variation to adaptive divergence.
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Affiliation(s)
- Stephanie S Porter
- School of Biological Sciences, Washington State University, Vancouver, WA, USA
| | - Peter L Chang
- Section of Molecular and Computational Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA.,Department of Plant Pathology and Nematology, University of California, Davis, CA, USA
| | - Christopher A Conow
- Section of Molecular and Computational Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Joseph P Dunham
- Section of Molecular and Computational Biology, Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA
| | - Maren L Friesen
- Department of Plant Biology, Michigan State University, East Lansing, MI, USA
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Guentas L, Gensous S, Cavaloc Y, Ducousso M, Amir H, De Georges de Ledenon B, Moulin L, Jourand P. Burkholderia novacaledonica sp. nov. and B. ultramafica sp. nov. isolated from roots of Costularia spp. pioneer plants of ultramafic soils in New Caledonia. Syst Appl Microbiol 2016; 39:151-159. [DOI: 10.1016/j.syapm.2016.03.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 03/09/2016] [Accepted: 03/18/2016] [Indexed: 11/28/2022]
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Losfeld G, L'Huillier L, Fogliani B, Jaffré T, Grison C. Mining in New Caledonia: environmental stakes and restoration opportunities. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:5592-5607. [PMID: 25065482 DOI: 10.1007/s11356-014-3358-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 07/17/2014] [Indexed: 06/03/2023]
Abstract
New Caledonia is a widely recognised marine and terrestrial biodiversity hot spot. However, this unique environment is under increasing anthropogenic pressure. Major threats are related to land cover change and include fire, urban sprawling and mining. Resulting habitat loss and fragmentation end up in serious erosion of the local biodiversity. Mining is of particular concern due to its economic significance for the island. Open cast mines were exploited there since 1873, and scraping out soil to access ores wipes out flora. Resulting perturbations on water flows and dramatic soil erosion lead to metal-rich sediment transport downstream into rivers and the lagoon. Conflicting environmental and economic aspects of mining are discussed in this paper. However, mining practices are also improving, and where impacts are inescapable ecological restoration is now considered. Past and ongoing experiences in the restoration of New Caledonian terrestrial ecosystems are presented and discussed here. Economic use of the local floristic diversity could also promote conservation and restoration, while providing alternative incomes. In this regard, Ecocatalysis, an innovative approach to make use of metal hyperaccumulating plants, is of particular interest.
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Affiliation(s)
- Guillaume Losfeld
- FRE 3673-Bioinspired Chemistry and Ecological Innovation-CNRS, University of Montpellier 2, Stratoz, Cap Alpha, Avenue de l'Europe, 34830, Clapiers, France
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Mesa J, Mateos-Naranjo E, Caviedes MA, Redondo-Gómez S, Pajuelo E, Rodríguez-Llorente ID. Scouting contaminated estuaries: heavy metal resistant and plant growth promoting rhizobacteria in the native metal rhizoaccumulator Spartina maritima. MARINE POLLUTION BULLETIN 2015; 90:150-159. [PMID: 25467875 DOI: 10.1016/j.marpolbul.2014.11.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 10/31/2014] [Accepted: 11/01/2014] [Indexed: 06/04/2023]
Abstract
Spartina maritima is a native endangered heavy metal rhizoaccumulator cordgrass naturally growing in southwest coasts of Spain, where is used as a biotool to rehabilitate degraded salt marshes. Fifteen bacterial strains were isolated from the rhizosphere of S. maritima growing in the estuary of the Tinto River, one of the most polluted areas in the world. A high proportion of bacteria were resistant towards several heavy metals. They also exhibited multiple plant growth promoting (PGP) properties, in the absence and the presence of Cu. Bacillus methylotrophicus SMT38, Bacillusaryabhattai SMT48, B. aryabhattai SMT50 and Bacilluslicheniformis SMT51 were selected as the best performing strains. In a gnobiotic assay, inoculation of Medicago sativa seeds with the selected isolates induced higher root elongation. The inoculation of S. maritima with these indigenous metal-resistant PGP rhizobacteria could be an efficient method to increase plant adaptation and growth in contaminated estuaries during restoration programs.
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Affiliation(s)
- J Mesa
- Departamento de Microbiología, Facultad de Farmacia, Universidad de Sevilla, C/Profesor García González 2, 41012 Sevilla, Spain
| | - E Mateos-Naranjo
- Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain
| | - M A Caviedes
- Departamento de Microbiología, Facultad de Farmacia, Universidad de Sevilla, C/Profesor García González 2, 41012 Sevilla, Spain
| | - S Redondo-Gómez
- Departamento de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain
| | - E Pajuelo
- Departamento de Microbiología, Facultad de Farmacia, Universidad de Sevilla, C/Profesor García González 2, 41012 Sevilla, Spain
| | - I D Rodríguez-Llorente
- Departamento de Microbiología, Facultad de Farmacia, Universidad de Sevilla, C/Profesor García González 2, 41012 Sevilla, Spain.
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Rubio-Sanz L, Prieto RI, Imperial J, Palacios JM, Brito B. Functional and expression analysis of the metal-inducible dmeRF system from Rhizobium leguminosarum bv. viciae. Appl Environ Microbiol 2013; 79:6414-22. [PMID: 23934501 PMCID: PMC3811197 DOI: 10.1128/aem.01954-13] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Accepted: 08/06/2013] [Indexed: 02/04/2023] Open
Abstract
A gene encoding a homolog to the cation diffusion facilitator protein DmeF from Cupriavidus metallidurans has been identified in the genome of Rhizobium leguminosarum UPM791. The R. leguminosarum dmeF gene is located downstream of an open reading frame (designated dmeR) encoding a protein homologous to the nickel- and cobalt-responsive transcriptional regulator RcnR from Escherichia coli. Analysis of gene expression showed that the R. leguminosarum dmeRF genes are organized as a transcriptional unit whose expression is strongly induced by nickel and cobalt ions, likely by alleviating the repressor activity of DmeR on dmeRF transcription. An R. leguminosarum dmeRF mutant strain displayed increased sensitivity to Co(II) and Ni(II), whereas no alterations of its resistance to Cd(II), Cu(II), or Zn(II) were observed. A decrease of symbiotic performance was observed when pea plants inoculated with an R. leguminosarum dmeRF deletion mutant strain were grown in the presence of high concentrations of nickel and cobalt. The same mutant induced significantly lower activity levels of NiFe hydrogenase in microaerobic cultures. These results indicate that the R. leguminosarum DmeRF system is a metal-responsive efflux mechanism acting as a key element for metal homeostasis in R. leguminosarum under free-living and symbiotic conditions. The presence of similar dmeRF gene clusters in other Rhizobiaceae suggests that the dmeRF system is a conserved mechanism for metal tolerance in legume endosymbiotic bacteria.
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Affiliation(s)
- L. Rubio-Sanz
- Centro de Biotecnología y Genómica de Plantas (CBGP) and Departamento de Biotecnología, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Politécnica de Madrid, Madrid, Spain
| | - R. I. Prieto
- Centro de Biotecnología y Genómica de Plantas (CBGP) and Departamento de Biotecnología, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Politécnica de Madrid, Madrid, Spain
| | - J. Imperial
- Centro de Biotecnología y Genómica de Plantas (CBGP) and Departamento de Biotecnología, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Politécnica de Madrid, Madrid, Spain
- Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - J. M. Palacios
- Centro de Biotecnología y Genómica de Plantas (CBGP) and Departamento de Biotecnología, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Politécnica de Madrid, Madrid, Spain
| | - B. Brito
- Centro de Biotecnología y Genómica de Plantas (CBGP) and Departamento de Biotecnología, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Politécnica de Madrid, Madrid, Spain
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Chardot-Jacques V, Calvaruso C, Simon B, Turpault MP, Echevarria G, Morel JL. Chrysotile dissolution in the rhizosphere of the nickel hyperaccumulator Leptoplax emarginata. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:2612-20. [PMID: 23373689 DOI: 10.1021/es301229m] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Ni phytoextraction processes need further understanding of the interactions between Ni availability in soils and its absorption by plant roots. The large metal uptake and root exudation by hyperaccumulator species could accelerate the weathering process of Ni-bearing phases in the rhizosphere. The aim of this work was to quantify the weathering of a Ni-bearing mineral phase in the rhizosphere of the Ni-hyperaccumulator Leptoplax emarginata. The studied mineral was chrysotile which was characterized by a low Ni solubility. Column experiments were performed to assess the effect of the Ni-hyperaccumulator L. emarginata and the contribution of rhizobacteria on the dissolution rate of chrysotile. Mineral weathering was monitored by measuring Ni and Mg transferred to leachates or plants throughout the experiment. Results showed that L. emarginata increased chrysotile dissolution by more than 2-fold . The hyperaccumulator L. emarginata accumulated 88% on average of total mobilized Ni. Inoculation with Ni-resistant bacteria in the rhizosphere of L. emarginata had no significant effect on chrysotile dissolution or plant accumulation of Ni in this context. Finally, after 15 weeks of culture, 1.65% of total Ni in the system was mobilized in the planted treatments compared with 0.03% in the unplanted treatments.
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Affiliation(s)
- Vanessa Chardot-Jacques
- Laboratoire Sols et Environnement, UMR 1120, Unversité de Lorraine - INRA, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandoeuvre-lès-Nancy, Cédex, France
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Gonin M, Gensous S, Lagrange A, Ducousso M, Amir H, Jourand P. Rhizosphere bacteria ofCostulariaspp. from ultramafic soils in New Caledonia: diversity, tolerance to extreme edaphic conditions, and role in plant growth and mineral nutrition. Can J Microbiol 2013; 59:164-74. [DOI: 10.1139/cjm-2012-0570] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Rhizosphere bacteria were isolated from Costularia spp., pioneer sedges from ultramafic soils in New Caledonia, which is a hotspot of biodiversity in the South Pacific. Genus identification, ability to tolerate edaphic constraints, and plant-growth-promoting (PGP) properties were analysed. We found that 105colony-forming units per gram of root were dominated by Proteobacteria (69%) and comprised 21 genera, including Burkholderia (28%), Curtobacterium (15%), Bradyrhizobium (9%), Sphingomonas (8%), Rhizobium (7%), and Bacillus (5%). High proportions of bacteria tolerated many elements of the extreme edaphic conditions: 82% tolerated 100 μmol·L–1chromium, 70% 1 mmol·L–1nickel, 63% 10 mmol·L–1manganese, 24% 1 mmol·L–1cobalt, and 42% an unbalanced calcium/magnesium ratio (1/16). These strains also exhibited multiple PGP properties, including the ability to produce ammonia (65%), indole-3-acetic acid (60%), siderophores (52%), and 1-aminocyclopropane-1-carboxylate (ACC) deaminase (39%); as well as the capacity to solubilize phosphates (19%). The best-performing strains were inoculated with Sorghum sp. grown on ultramafic substrate. Three strains significantly enhanced the shoot biomass by up to 33%. The most successful strains influenced plant nutrition through the mobilization of metals in roots and a reduction of metal transfer to shoots. These results suggest a key role of these bacteria in plant growth, nutrition, and adaptation to the ultramafic constraints.
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Affiliation(s)
- Mathieu Gonin
- Institut de recherche pour le développement (IRD), Laboratoire des symbioses tropicales et Méditerranéennes (LSTM UR040), B.P. A5, 98848 Nouméa, Nouvelle-Calédonie
| | - Simon Gensous
- Université de la Nouvelle-Calédonie, Laboratoire insulaire du vivant et de l’environnement, B.P. R4, 98851 Nouméa Cedex, Nouvelle-Calédonie
| | - Alexandre Lagrange
- Université de la Nouvelle-Calédonie, Laboratoire insulaire du vivant et de l’environnement, B.P. R4, 98851 Nouméa Cedex, Nouvelle-Calédonie
| | - Marc Ducousso
- Le Centre de coopération internationale en recherche agronomique pour le développement (CIRAD), Laboratoire des symbioses tropicales et Méditerranéennes (LSTM), Campus international de Baillarguet, TA-A82/J - 34398 Montpellier Cedex 5, France
| | - Hamid Amir
- Université de la Nouvelle-Calédonie, Laboratoire insulaire du vivant et de l’environnement, B.P. R4, 98851 Nouméa Cedex, Nouvelle-Calédonie
| | - Philippe Jourand
- Institut de recherche pour le développement (IRD), Laboratoire des symbioses tropicales et Méditerranéennes (LSTM UR040), B.P. A5, 98848 Nouméa, Nouvelle-Calédonie
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23
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Relationships between pasture legumes, rhizobacteria and nodule bacteria in heavy metal polluted mine waste of SW Sardinia. Symbiosis 2012. [DOI: 10.1007/s13199-012-0207-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Porter SS, Rice KJ. TRADE-OFFS, SPATIAL HETEROGENEITY, AND THE MAINTENANCE OF MICROBIAL DIVERSITY. Evolution 2012; 67:599-608. [DOI: 10.1111/j.1558-5646.2012.01788.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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25
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Klonowska A, Chaintreuil C, Tisseyre P, Miché L, Melkonian R, Ducousso M, Laguerre G, Brunel B, Moulin L. Biodiversity of Mimosa pudica rhizobial symbionts (Cupriavidus taiwanensis, Rhizobium mesoamericanum) in New Caledonia and their adaptation to heavy metal-rich soils. FEMS Microbiol Ecol 2012; 81:618-35. [DOI: 10.1111/j.1574-6941.2012.01393.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 04/06/2012] [Accepted: 04/09/2012] [Indexed: 11/30/2022] Open
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Li J, Zhang T, Wang L, Liu Y, Dai R, Liu X. Characterization and quantification of the nickel resistant microbial community in activated sludge using 16S rDNA and nickel resistance genes. ENVIRONMENTAL TECHNOLOGY 2011; 32:533-542. [PMID: 21877534 DOI: 10.1080/09593330.2010.504749] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The effect of nickel on the microbial community in the activated sludge of a sequencing batch reactor (SBR) reactor was investigated by continuously dosing nickel from 60 to 240 mg Ni(II) L(-1). The diversity of the microbial community was investigated by polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis of the variable V3 region of the bacterial 16S rDNA. The experimental results showed that the community structure changed significantly after dosing with nickel with a shift in dominant species, the disappearance of some original species and the emergence of some new species. The existence of a nickel resistant gene was also investigated using PCR. The obtained nickel resistance gene had a maximum homology with the plasmid pMOL30 of Ralstonia metallidurans CH34. The quantitative real-time PCR results indicated that the quantity of the nickel resistance gene was related to the nickel concentration loaded to the reactor.
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Affiliation(s)
- Jia Li
- Environmental Biotechnology Laboratory, Department of Civil Engineering, University of Hong Kong, Hong Kong, China
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27
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Jourand P, Ducousso M, Reid R, Majorel C, Richert C, Riss J, Lebrun M. Nickel-tolerant ectomycorrhizal Pisolithus albus ultramafic ecotype isolated from nickel mines in New Caledonia strongly enhance growth of the host plant Eucalyptus globulus at toxic nickel concentrations. TREE PHYSIOLOGY 2010; 30:1311-1319. [PMID: 20688880 DOI: 10.1093/treephys/tpq070] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Ectomycorrhizal (ECM) Pisolithus albus (Cooke & Massee), belonging to the ultramafic ecotype isolated in nickel-rich serpentine soils from New Caledonia (a tropical hotspot of biodiversity) and showing in vitro adaptive nickel tolerance, were inoculated to Eucalyptus globulus Labill used as a Myrtaceae plant-host model to study ectomycorrhizal symbiosis. Plants were then exposed to a nickel (Ni) dose-response experiment with increased Ni treatments up to 60 mg kg( - )(1) soil as extractable Ni content in serpentine soils. Results showed that plants inoculated with ultramafic ECM P. albus were able to tolerate high and toxic concentrations of Ni (up to 60 μg g( - )(1)) while uninoculated controls were not. At the highest Ni concentration tested, root growth was more than 20-fold higher and shoot growth more than 30-fold higher in ECM plants compared with control plants. The improved growth in ECM plants was associated with a 2.4-fold reduction in root Ni concentration but a massive 60-fold reduction in transfer of Ni from root to shoots. In vitro, P. albus strains could withstand high Ni concentrations but accumulated very little Ni in its tissue. The lower Ni uptake by mycorrhizal plants could not be explained by increased release of metal-complexing chelates since these were 5- to 12-fold lower in mycorrhizal plants at high Ni concentrations. It is proposed that the fungal sheath covering the plant roots acts as an effective barrier to limit transfer of Ni from soil into the root tissue. The degree of tolerance conferred by the ultramafic P. albus isolates to growth of the host tree species is considerably greater than previously reported for other ECM. The primary mechanisms underlying this improved growth were identified as reduced Ni uptake into the roots and markedly reduced transfer from root to shoot in mycorrhizal plants. The fact that these positive responses were observed at Ni concentrations commonly observed in serpentinic soils suggests that ultramafic ecotypes of P. albus could play an important role in the adaptation of tree species to soils containing high concentrations of heavy metals and aid in strategies for ecological restoration.
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Affiliation(s)
- Philippe Jourand
- Laboratoire des Symbioses Tropicales et Méditerranéennes, 98848 Nouméa cedex, Nouvelle-Calédonie.
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Jourand P, Ducousso M, Loulergue-Majorel C, Hannibal L, Santoni S, Prin Y, Lebrun M. Ultramafic soils from New Caledonia structurePisolithus albusin ecotype. FEMS Microbiol Ecol 2010; 72:238-49. [DOI: 10.1111/j.1574-6941.2010.00843.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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