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Tian J, Du Y, Yu C, Liu W, Zou R, Zhao Y, Zhang T, Jiang Y, Tian Z. The influences of heavy metals on soil microbial C, N, P cycling and heavy metal resistance under different fertilization regimes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2025; 370:125915. [PMID: 39993708 DOI: 10.1016/j.envpol.2025.125915] [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: 12/06/2024] [Revised: 02/13/2025] [Accepted: 02/21/2025] [Indexed: 02/26/2025]
Abstract
Heavy metal pollution changes microbial heavy metal resistance and ecological functions of carbon (C), nitrogen (N), phosphorus (P), sulfur (S) cycling, although the connections between these changes have been insufficiently explored. The study investigated the effects of varying levels of heavy metal pollution and nutrient on microbial heavy metal resistance and C, N, P, S cycling in soils. The results indicated that heavy metal pollution significantly enhanced microbial metabolic potentials, such as denitrification, Dissimilatory nitrate reduction (DNRA), P uptake and transport, as well as resistance to Cu, Cd, Pb, and As. Heavy metals and pH were identified as major factors affecting these microbial functions. The diversity and evenness of host microorganisms carrying functional genes and heavy metal resistance genes (MRGs) were significantly affected by heavy metal pollution, but this effect was alleviated with the nutrient increased. In low-nutrient soils, a strong correlation between nitrogen degradation and Zn resistance was observed due to heavy metal pollution. As nutrients increased, the close correlations between hemicellulose, P uptake and transport, nitrogen degradation and Zn resistance were also observed. Bradyrhizobium, Nitrospira, Steroidobacter, and Luteitalea might play important roles in regulating C, N, P cycling and heavy metal resistance. This study revealed the adjustment mechanisms of microbial heavy metals resistance and ecological functions under heavy metal pollution and identified the primary host microorganisms.
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Affiliation(s)
- Jingyu Tian
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Yanbin Du
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Caihong Yu
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, 100083, China.
| | - Wenqing Liu
- Beijing Institute of Mineral Geology, Beijing, 101500, China
| | - Ruihong Zou
- Agricultural Technology Promotion Center of Longkou City, Longkou, 265700, China
| | - Yunfeng Zhao
- Beijing Institute of Mineral Geology, Beijing, 101500, China
| | - Tao Zhang
- Beijing Institute of Mineral Geology, Beijing, 101500, China
| | - Yucong Jiang
- Beijing Institute of Mineral Geology, Beijing, 101500, China
| | - Zhijun Tian
- Beijing Institute of Mineral Geology, Beijing, 101500, China
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2
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Banasiewicz J, Gumowska A, Hołubek A, Orzechowski S. Adaptations of the Genus Bradyrhizobium to Selected Elements, Heavy Metals and Pesticides Present in the Soil Environment. Curr Issues Mol Biol 2025; 47:205. [PMID: 40136459 PMCID: PMC11941057 DOI: 10.3390/cimb47030205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2025] [Revised: 03/08/2025] [Accepted: 03/17/2025] [Indexed: 03/27/2025] Open
Abstract
Rhizobial bacteria perform a number of extremely important functions in the soil environment. In addition to fixing molecular nitrogen and transforming it into a form available to plants, they participate in the circulation of elements and the decomposition of complex compounds present in the soil, sometimes toxic to other organisms. This review article describes the molecular mechanisms occurring in the most diverse group of rhizobia, the genus Bradyrhizobium, allowing these bacteria to adapt to selected substances found in the soil. Firstly, the adaptation of bradyrhizobia to low and high concentrations of elements such as iron, phosphorus, sulfur, calcium and manganese was shown. Secondly, the processes activated in their cells in the presence of heavy metals such as lead, mercury and arsenic, as well as radionuclides, were described. Additionally, due to the potential use of Bradyrhziobium as biofertilizers, their response to pesticides commonly used in agriculture, such as glyphosate, sulfentrazone, chlorophenoxy herbicides, flumioxazine, imidazolinone, atrazine, and insecticides and fungicides, was also discussed. The paper shows the great genetic diversity of bradyrhizobia in terms of adapting to variable environmental conditions present in the soil.
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Affiliation(s)
- Joanna Banasiewicz
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Aleksandra Gumowska
- Faculty of Biology and Biotechnology, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776 Warsaw, Poland; (A.G.); (A.H.)
| | - Agata Hołubek
- Faculty of Biology and Biotechnology, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776 Warsaw, Poland; (A.G.); (A.H.)
| | - Sławomir Orzechowski
- Department of Biochemistry and Microbiology, Institute of Biology, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776 Warsaw, Poland
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Yang Y, Cui K, Huang Y, Yu K, Li C, Chen Y. Differential insights into the distribution characteristics of bacterial communities and their response to typical pollutants in the sediment and soil of large drinking water reservoir. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2025; 373:123947. [PMID: 39752965 DOI: 10.1016/j.jenvman.2024.123947] [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: 08/05/2024] [Revised: 10/21/2024] [Accepted: 12/27/2024] [Indexed: 01/15/2025]
Abstract
In this study, a large drinking water reservoir (Fengshuba Reservoir) was chosen as a representative case, and the bacterial communities in the sediments and soils of Water-level fluctuating zone (WLFZ) as well as their responses to heavy metals (HMs) and polycyclic aromatic hydrocarbons (PAHs) were systematically investigated. The results indicated that the abundance and diversity of the bacterial community obviously changed with seasonal hydrological variations in sediments, and the absolute abundance and composition of bacteria community differed significantly between the sediment phase and soil phase. Bacteria with the ability to degrade pollutants rapidly proliferate and gain ascendancy in the soil phase, with Burkholderia-Caballeronia-Paraburkholderia (B-C-P) and Bradyrhizobium forming the core of the largest community. Furthermore, Co-occurrence network analysis indicated that a more stable bacterial community composition in the sediment phase. The community assembly pattern of bacteria in sediments exhibit a higher degree of stochasticity than that observed in soils of the WLFZ. Furthermore, the Spearman correlations found that the interaction between physicochemical factors, HMs, and PAHs with bacteria community was stronger in the soils of WLFZ. In total, the structural equation models indicated that PAHs were the main driver in altering the deterministic process of bacterial community in the sediment, while HMs and physicochemical factors had a greater effect on the bacteria community in the WLFZ. This study systematically revealed the differential characteristics of bacterial community and their response to typical pollutants between the sediments and soils of large drinking water reservoir.
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Affiliation(s)
- Yongjie Yang
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China; School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Kangping Cui
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Yuansheng Huang
- College of Ecology and Environment, Xinjiang University, Urumqi, 830017, China
| | - Kaifeng Yu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Chenxuan Li
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Yihan Chen
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
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Kushwaha P, Murawska-Wlodarczyk K, Stanek M, Stefanowicz AM, Seget B, Babst-Kostecka A. Trade-offs and adaptation to metalliferous soils: The role of soil microbiome in metal tolerance and uptake in Arabidopsis halleri ecotypes from a reciprocal transplant experiment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 957:177470. [PMID: 39547387 DOI: 10.1016/j.scitotenv.2024.177470] [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: 06/24/2024] [Revised: 11/05/2024] [Accepted: 11/07/2024] [Indexed: 11/17/2024]
Abstract
Soil contamination with trace metal elements is a worldwide issue, prompting research on plant species capable of hyperaccumulating metals to reduce soil toxicity. Previous research suggests that both plant species and their populations can affect soil microbial communities, yet little is known about how different populations of hyperaccumulator species influence these microbial communities to enhance metal-uptake and tolerance. This study evaluated the effect of soil origin, soil microbiome, and plant population on phytoextraction efficiencies of Cd and Zn among four A. halleri populations: two each from metalliferous and non-metalliferous sites. In a controlled transplant experiment, clonal replicates of A. halleri were grown in native and three non-native soils for six months. Biogeochemical analyses of plants and soils were conducted, alongside sequencing of root-associated soil bacterial/archaeal and fungal DNA. Soil treatments primarily differed in pH, total Cd, Pb, and Zn, as well as acid and alkaline phosphatase enzyme activities. A combined effect of soil origin and population was noted for arylsulfatase and β-glucosidase activities, as well as ammonium and nitrate concentrations. Both non-metallicolous and metallicolous populations accumulated high levels of Cd and Zn in metalliferous soils with the non-metallicolous population NM_PL14 outperforming the metallicolous populations in Zn hyperaccumulation. Interestingly, non-metallicolous populations grown in metalliferous soils exhibited no trade-offs in plant performance despite higher Cd and Zn accumulation. Soil origin had a stronger effect on the bacterial/archaeal and fungal community composition than plant ecotype. Partial least square regression models explained 66 % and 79 % of the variability in A. halleri Cd and Zn hyperaccumulation. There was a positive association between Zn-uptake and specific microbial taxa (e.g., Cornebacteriales, Microbacteriaceae, Propionibacteriales, Rhizobiaceae, Basidiomycota, Oidiodendron, Phallaceae) and functional activity (e.g., arylsulfatase, S oxidation) in metalliferous soils. Taken together, our findings suggest that non-metallicolous A. halleri populations may be better suited for Zn phytoextraction applications.
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Affiliation(s)
- Priyanka Kushwaha
- Department of Environmental Science, The University of Arizona, Tucson, AZ 85721, USA.
| | | | - Małgorzata Stanek
- W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, 31-512 Krakow, Poland
| | - Anna M Stefanowicz
- W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, 31-512 Krakow, Poland
| | - Barbara Seget
- W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, 31-512 Krakow, Poland
| | - Alicja Babst-Kostecka
- Department of Environmental Science, The University of Arizona, Tucson, AZ 85721, USA
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Agashe R, George J, Pathak A, Fasakin O, Seaman J, Chauhan A. Shotgun metagenomics analysis indicates Bradyrhizobium spp. as the predominant genera for heavy metal resistance and bioremediation in a long-term heavy metal-contaminated ecosystem. Microbiol Resour Announc 2024; 13:e0024524. [PMID: 39499072 PMCID: PMC11636340 DOI: 10.1128/mra.00245-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Accepted: 08/28/2024] [Indexed: 11/07/2024] Open
Abstract
Ten soil cores were collected from the long-term heavy metal-contaminated Savannah River Site (SRS) and studied using shotgun metagenomics. In-line with our previous reports, Bradyrhizobium spp. dominated the SRS soils, and thus we recommend that SRS bioremediation studies target the Bradyrhizobium genus.
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Affiliation(s)
- Rohan Agashe
- School of the Environment, Florida A&M University, Tallahassee, Florida, USA
| | - Jonathan George
- School of the Environment, Florida A&M University, Tallahassee, Florida, USA
| | - Ashish Pathak
- School of the Environment, Florida A&M University, Tallahassee, Florida, USA
| | - Olasunkanmi Fasakin
- School of the Environment, Florida A&M University, Tallahassee, Florida, USA
| | - John Seaman
- Savannah River Ecology Laboratory, University of Georgia, Aiken, South Carolina, USA
| | - Ashvini Chauhan
- School of the Environment, Florida A&M University, Tallahassee, Florida, USA
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6
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Lan W, Zhou Q, Li J, Liu M, Deng Y, Huang Y, Zhou Y, Yang H, Xiao Y. Investigation of Cd and Pb enrichment capacities of Erigeron sumatrensis across three polluted regions: Insights into soil parameters and microbial communities. ENVIRONMENTAL RESEARCH 2024; 262:119868. [PMID: 39216739 DOI: 10.1016/j.envres.2024.119868] [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: 07/01/2024] [Revised: 08/17/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024]
Abstract
Erigeron sumatrensis is a vigorously growing invasive plant in mining areas and has been the subject of research for its potential in the phytoremediation of heavy metals. In this study, the bioconcentration factor (BCF) and translocation factor (TF) of E. sumatrensis were assessed to evaluate its phytoaccumulation potential for cadmium (Cd) and lead (Pb) across three distinct zinc mining regions with different degrees of contamination, including Huayuan (HY), Yueyang (YY), and Liuyang (LY) areas. The region of HY is identified as having the most severe Cd contamination, while the most pronounced Pb pollution characterizes the LY area. The findings indicate that E. sumatrensis demonstrated a stronger ability to enrich Cd and Pb in less contaminated areas. To elucidate the underlying mechanisms, high-throughput sequencing of 16S rRNA and internal transcribed spacer (ITS) regions was employed to analyze the rhizosphere bacterial and fungal communities across the three areas. The results revealed significant variations in the microbial community structure, function, and composition, suggesting a complex interplay between the plant and its associated microorganisms. Correlation analysis identified several soil properties, including soil pH, total nitrogen (TN), available nitrogen (AN), organic matter (OM), and available phosphorus (AP), as pivotal factors that may influence the heavy metal enrichment capabilities of the plant. Notably, some microorganisms (e.g., Burkholderia, Brevundimonas, Paraglomus, and Trichoderma) and enzymes (e.g., P-type ATPases, citrate synthase, catalase) of microorganisms were found to be potentially involved in facilitating the accumulation of Cd and Pb by E. sumatrensis. This research contributes to understanding how invasive alien plants can be utilized to remedy contaminated environments. It highlights the importance of modulating critical soil factors to enhance the phytoremediation potential of E. sumatrensis, which could aid in developing strategies to manage invasive plants and mitigate heavy metal pollution in ecosystems.
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Affiliation(s)
- Wendi Lan
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Qingfan Zhou
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Jian Li
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Mingxin Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Yan Deng
- Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China
| | - Yong Huang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Yu Zhou
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Hua Yang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China; Yuelushan Laboratory, Changsha, 410128, China.
| | - Yunhua Xiao
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China; Yuelushan Laboratory, Changsha, 410128, China.
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7
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Soto-Varela ZE, Orozco-Sánchez CJ, Bolívar-Anillo HJ, Martínez JM, Rodríguez N, Consuegra-Padilla N, Robledo-Meza A, Amils R. Halotolerant Endophytic Bacteria Priestia flexa 7BS3110 with Hg 2+ Tolerance Isolated from Avicennia germinans in a Caribbean Mangrove from Colombia. Microorganisms 2024; 12:1857. [PMID: 39338530 PMCID: PMC11434322 DOI: 10.3390/microorganisms12091857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/29/2024] [Accepted: 05/31/2024] [Indexed: 09/30/2024] Open
Abstract
The mangrove ecosystems of the Department of Atlántico (Colombian Caribbean) are seriously threatened by problems of hypersalinization and contamination, especially by heavy metals from the Magdalena River. The mangrove plants have developed various mechanisms to adapt to these stressful conditions, as well as the associated microbial populations that favor their growth. In the present work, the tolerance and detoxification capacity to heavy metals, especially to mercury, of a halotolerant endophytic bacterium isolated from the species Avicennia germinans located in the Balboa Swamp in the Department of Atlántico was characterized. Diverse microorganisms were isolated from superficially sterilized A. germinans leaves. Tolerance to NaCl was evaluated for each of the obtained isolates, and the most resistant was selected to assess its tolerance to Pb2+, Cu2+, Hg2+, Cr3+, Co2+, Ni2+, Zn2+, and Cd2+, many of which have been detected in high concentrations in the area of study. According to the ANI and AAI percentages, the most halotolerant strain was identified as Priestia flexa, named P. flexa 7BS3110, which was able to tolerate up to 12.5% (w/v) NaCl and presented a minimum inhibitory concentrations (MICs) of 0.25 mM for Hg, 10 mM for Pb, and 15 mM for Cr3+. The annotation of the P. flexa 7BS3110 genome revealed the presence of protein sequences associated with exopolysaccharide (EPS) production, thiol biosynthesis, specific proteins for chrome efflux, non-specific proteins for lead efflux, and processes associated with sulfur and iron homeostasis. Scanning electron microscopy (SEM) analysis showed morphological cellular changes and the transmission electron microscopy (TEM) showed an electrodense extracellular layer when exposed to 0.25 mM Hg2+. Due to the high tolerance of P. flexa 7BS3110 to Hg2+ and NaCl, its ability to grow when exposed to both stressors was tested, and it was able to thrive in the presence of 5% (w/v) NaCl and 0.25 mM of Hg2+. In addition, it was able to remove 98% of Hg2+ from the medium when exposed to a concentration of 14 mg/L of this metalloid. P. flexa 7BS3110 has the potential to bioremediate Hg2+ halophilic contaminated ecosystems.
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Affiliation(s)
- Zamira E Soto-Varela
- Facultad de Ciencias Básicas y Biomédicas, Centro de Investigación en Biodiversidad y Cambio Climático-ADAPTIA, Universidad Simón Bolívar, Barranquilla 080002, Colombia
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma de Madrid, Campus Cantoblanco, 28049 Madrid, Spain
| | - Christian J Orozco-Sánchez
- Facultad de Ciencias Básicas y Biomédicas, Centro de Investigación en Biodiversidad y Cambio Climático-ADAPTIA, Universidad Simón Bolívar, Barranquilla 080002, Colombia
- Institute of Applied Microbiology, Justus-Liebig-University, 35392 Giessen, Germany
| | - Hernando José Bolívar-Anillo
- Facultad de Ciencias Básicas y Biomédicas, Centro de Investigación en Biodiversidad y Cambio Climático-ADAPTIA, Universidad Simón Bolívar, Barranquilla 080002, Colombia
| | - José M Martínez
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma de Madrid, Campus Cantoblanco, 28049 Madrid, Spain
| | - Nuria Rodríguez
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma de Madrid, Campus Cantoblanco, 28049 Madrid, Spain
- Centro de Astrobiología (INTA-CSIC), Carretera, Ajalvir km 4, 28850 Torrejón de Ardoz, Spain
| | - Natalia Consuegra-Padilla
- Facultad de Ciencias Básicas y Biomédicas, Centro de Investigación en Biodiversidad y Cambio Climático-ADAPTIA, Universidad Simón Bolívar, Barranquilla 080002, Colombia
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma de Madrid, Campus Cantoblanco, 28049 Madrid, Spain
| | - Alfredo Robledo-Meza
- Facultad de Ciencias Básicas y Biomédicas, Centro de Investigación en Biodiversidad y Cambio Climático-ADAPTIA, Universidad Simón Bolívar, Barranquilla 080002, Colombia
| | - Ricardo Amils
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma de Madrid, Campus Cantoblanco, 28049 Madrid, Spain
- Centro de Astrobiología (INTA-CSIC), Carretera, Ajalvir km 4, 28850 Torrejón de Ardoz, Spain
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Jiménez-Venegas J, Zamora-Leiva L, Univaso L, Soto J, Tapia Y, Paneque M. Profile of Bacterial Communities in Copper Mine Tailings Revealed through High-Throughput Sequencing. Microorganisms 2024; 12:1820. [PMID: 39338494 PMCID: PMC11433839 DOI: 10.3390/microorganisms12091820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2024] [Revised: 08/27/2024] [Accepted: 08/28/2024] [Indexed: 09/30/2024] Open
Abstract
Mine-tailing dumps are one of the leading sources of environmental degradation, often with public health and ecological consequences. Due to the complex ecosystems generated, they are ideal sites for exploring the bacterial diversity of specially adapted microorganisms. We investigated the concentrations of trace metals in solid copper (Cu) mine tailings from the Ovejería Tailings Dam of the National Copper Corporation of Chile and used high-throughput sequencing techniques to determine the microbial community diversity of the tailings using 16S rRNA gene-based amplicon sequence analysis. The concentrations of the detected metals were highest in the following order: iron (Fe) > Cu > manganese (Mn) > molybdenum (Mo) > lead (Pb) > chromium (Cr) > cadmium (Cd). Furthermore, 16S rRNA gene-based sequence analysis identified 12 phyla, 18 classes, 43 orders, 82 families, and 154 genera at the three sampling points. The phylum Proteobacteria was the most dominant, followed by Chlamydiota, Bacteroidetes, Actinobacteria, and Firmicutes. Genera, such as Bradyrhizobium, Aquabacterium, Paracoccus, Caulobacter, Azospira, and Neochlamydia, showed high relative abundance. These genera are known to possess adaptation mechanisms in high concentrations of metals, such as Cd, Cu, and Pb, along with nitrogen-fixation capacity. In addition to their tolerance to various metals, some of these genera may represent pathogens of amoeba or humans, which contributes to the complexity and resilience of bacterial communities in the studied Cu mining tailings. This study highlights the unique microbial diversity in the Ovejería Tailings Dam, including the discovery of the genus Neochlamydia, reported for the first time for heavy metal resistance. This underscores the importance of characterizing mining sites, particularly in Chile, to uncover novel bacterial mechanisms for potential biotechnological applications.
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Affiliation(s)
- Joseline Jiménez-Venegas
- Faculty of Agricultural Sciences, University of Chile, Santa Rosa 11315, La Pintana, Santiago 8820808, Chile; (J.J.-V.); (Y.T.)
- Master Program in Territorial Management of Natural Resources, University of Chile, Santa Rosa 11315, La Pintana, Santiago 8820808, Chile
| | - Leonardo Zamora-Leiva
- Fundación Bionostra Chile Research, Almirante Lynch 1179, San Miguel, Santiago 8920033, Chile; (L.Z.-L.); (L.U.); (J.S.)
| | - Luciano Univaso
- Fundación Bionostra Chile Research, Almirante Lynch 1179, San Miguel, Santiago 8920033, Chile; (L.Z.-L.); (L.U.); (J.S.)
| | - Jorge Soto
- Fundación Bionostra Chile Research, Almirante Lynch 1179, San Miguel, Santiago 8920033, Chile; (L.Z.-L.); (L.U.); (J.S.)
| | - Yasna Tapia
- Faculty of Agricultural Sciences, University of Chile, Santa Rosa 11315, La Pintana, Santiago 8820808, Chile; (J.J.-V.); (Y.T.)
| | - Manuel Paneque
- Faculty of Agricultural Sciences, University of Chile, Santa Rosa 11315, La Pintana, Santiago 8820808, Chile; (J.J.-V.); (Y.T.)
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9
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Lin K, Jian J, Zhang Y, Liu Y, Li S, Zhao Y, Xu H. Study on Plant-blanket to reduce heavy metal migration caused by precipitation and to improve the soil environment of pyritic tailings. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 939:173376. [PMID: 38795991 DOI: 10.1016/j.scitotenv.2024.173376] [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: 03/13/2024] [Revised: 05/09/2024] [Accepted: 05/18/2024] [Indexed: 05/28/2024]
Abstract
The increasing demand for mineral resources due to industrial development has led to significant tailings pollution during the mineral extraction process. In the southwestern region of China, a large amount of pyritic tailings containing pyrite cinder easily leaches heavy metals and other pollutants when exposed to precipitation, resulting in widespread soil contamination. Effective remediation methods are urgently needed to address this issue. This study utilized naturally occurring Plant-blanket formed by the symbiosis of moss and herbaceous plants on pyritic tailings as restoration material. Through leaching experiments and staining tracer techniques, the study investigated the ability of Plant-blanket to reduce the migration of heavy metals from pyrite cinder to soil under the influence of precipitation and its role in improving the soil environment. The results showed that within 12 h, the Plant-blanket could absorb water equivalent to 206.9 % of its own weight and had good water retention ability. It reduced the stained area ratio of soil horizontal and vertical profiles after precipitation leaching by a maximum of 76.08 % and 46.41 %, respectively, and improved the pH, cation exchange capacity (CEC), bulk density, and water content of soil at different depths. In addition, after being covered by Plant-blanket, the migration of Cd and Cu was reduced by a maximum of 44.35 % and 55.77 % respectively, and it increased the diversity and abundance of bacterial communities, promoting the recovery of soil microbial ecological functions. These findings indicate that Plant-blanket can regulate water and improve soil environment, and has certain control ability on the migration of Cd and Cu produced by pyritic tailings. Meanwhile, Plant-blanket plays an important role in improving the soil environment in mining areas and promoting ecosystem restoration, providing valuable reference for further exploration of ecological restoration of tailings.
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Affiliation(s)
- Kangkai Lin
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China
| | - Jiannan Jian
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China
| | - Yumei Zhang
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China
| | - Yikai Liu
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China
| | - Shiyao Li
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China
| | - Yun Zhao
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China.
| | - Heng Xu
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, Sichuan, PR China; Key Laboratory of Environment Protection, Soil ecological protection and pollution control, Sichuan University & Department of Ecology and Environment of Sichuan, Chengdu 61006510, Sichuan, PR China.
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Wu Z, Cai P, Liang E, Chen Q, Sun W, Wang J. Distinct adaptive strategies and microbial interactions of soil viruses under different metal(loid) contaminations. JOURNAL OF HAZARDOUS MATERIALS 2023; 460:132347. [PMID: 37619274 DOI: 10.1016/j.jhazmat.2023.132347] [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: 06/07/2023] [Revised: 08/05/2023] [Accepted: 08/17/2023] [Indexed: 08/26/2023]
Abstract
Viruses, as the most abundant organisms, significantly influence ecological function and microbial survival in soils, yet little was known about how viruses and virus-microbe interactions respond to environmental stresses induced by metal(loid) contaminations. Here, we conducted the metagenomic analysis to investigate the adaptative mechanisms of soil viruses under different metal(loid) contamination levels. By capturing a catalogue of 23,066 viruses, we found that viral communities exhibited the increased richness, diversity, and the temperate to lytic ratio in facing the highest metal(loid) contaminations. Meanwhile, viruses displayed obvious lineage-specific infection modes to distinct dominant hosts under different pollution levels. Viral functions linking to the inhibition of transcription and the enhancement of DNA repairment as well as multiple resistance not only contributed to coping with elevated multiple metal(loid) stresses, but also facilitated the adaptation and functioning of viral hosts. Moreover, the harmonious coexistence of viruses and resistant/pathogenic bacteria under the heaviest contaminations potentially exacerbated disseminating resistance and pathogenicity, while viruses under the lightest contaminations might be natural predators of resistant/pathogenic bacteria through lysing host cells. Overall, this study highlights the ecological importance of viral adaptation and the interactions between viruses and resistant/pathogenic bacteria in contaminated environments, contributing to developing virus-based approaches to soil restoration.
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Affiliation(s)
- Zongzhi Wu
- College of Environmental Sciences and Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing 100871, China; School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Pinggui Cai
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Enhang Liang
- College of Environmental Sciences and Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing 100871, China
| | - Qian Chen
- College of Environmental Sciences and Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing 100871, China
| | - Weiling Sun
- College of Environmental Sciences and Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing 100871, China
| | - Jiawen Wang
- College of Environmental Sciences and Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing 100871, China; School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
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Peng X, Zhao R, Yang Y, Zhou Y, Zhu Y, Qin P, Wang M, Huang H. Effect of the Combination of Phosphate-Solubilizing Bacteria with Orange Residue-Based Activator on the Phytoremediation of Cadmium by Ryegrass. PLANTS (BASEL, SWITZERLAND) 2023; 12:2727. [PMID: 37514342 PMCID: PMC10384834 DOI: 10.3390/plants12142727] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 06/25/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
Amendments with activators or microorganisms to enhance phytoremediation in toxic-metal-polluted soils have been widely studied. In this research, the production of indoleacetic acid, siderophore, and 1-aminocyclopropane-1-carboxylate (ACC) deaminase by phosphate-solubilizing bacteria was investigated during a pure culture experiment. Pot experiments were performed using Cd-polluted soil with the following treatments: control (CK, only ultrapure water), orange-peel-based activator (OG), and a combination of phosphate-solubilizing bacteria (Acinetobacter pitti) and OG (APOG). Ryegrass plant height and fresh weight, Cd content in ryegrass, total and available Cd soil content, soil enzyme activity, and soil bacterial diversity were determined in this work. The findings showed that the height of ryegrass in OG and APOG increased by 14.78% and 21.23%. In the APOG group, a decreased ratio of Cd was 3.37 times that of CK, and the bioconcentration factor was 1.28 times that of CK. The neutral phosphatase activity of APOG was 1.33 times that of CK and catalase activity was 1.95 times that of CK. The activity of urease was increased by 35.48%. APOG increased the abundance of beneficial bacteria and Proteobacteria was the dominant bacterium, accounting for 57.38% in APOG. Redundancy analysis (RDA) showed that nutrient elements were conducive to the propagation of the dominant bacteria, the secretion of enzymes, and the extraction rate of Cd in the soil. The possible enhancement mechanism of phytoremediation of cadmium by A. pitti combined with OG was that, on the one hand, APOG increased soil nutrient elements and enzyme activities promoted the growth of ryegrass. On the other hand, APOG activated Cd and boosted the movement of Cd from soil to ryegrass. This research offers insight for the combination of phosphate-solubilizing bacteria with an orange-peel-based activator to improve phytoremediation of Cd-contaminated soils and also provides a new way for the resource utilization of fruit residue.
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Affiliation(s)
- Xin Peng
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Rule Zhao
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Yuan Yang
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Yaoyu Zhou
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Yichun Zhu
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Pufeng Qin
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Mi Wang
- Chinalco Environmental Protection and Ecological Technology (Hunan) Co., Ltd., Changsha 410021, China
| | - Hongli Huang
- Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
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Zhang R, Song C, Zhao Y, Zhang G, Xie L, Wei Z, Li H. A new strategy for treating Pb 2+ and Zn 2+ pollution with industrial waste derivatives Humin. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 322:121236. [PMID: 36758929 DOI: 10.1016/j.envpol.2023.121236] [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: 11/16/2022] [Revised: 01/18/2023] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
Metal pollution caused by industrial waste accumulation is a long-term and far-reaching problem. Humin (HM), as a highly condensed organic component insoluble in alkaline or water solution, is often discarded as humic acid industrial waste. However, the abundant active functional groups in HM reported by some researches make it possible for HM to remove metals. In this study, a waste reuse strategy was proposed to reduce the pressure of industrial metal pollution on the environment. HM was obtained from lignite waste residue. Scanning electron microscopy, energy spectrum and Fourier infrared spectroscopy, combined with the adsorption models were employed to reveal the mechanism of HM adsorption. The results showed that HM had multiple adsorption mechanism and high biological stability. The adsorption capacity of HM to Zn2+ and Pb2+ were 194.88 mg/g and 289.59 mg/g respectively. HM adsorbed Zn2+ mainly by physical multilayer adsorption. And the adsorption of Pb2+ by HM was mainly a monolayer chemical reaction, which depended on its active functional groups and the exchange of valence electrons. Notably, HM could simultaneously remove Pb2+ and Zn2+ and almost did not affect its original adsorption capacity to single ions. These results will provide a new strategy for the treatment of metal pollution in the future and alleviate the pressure of multiple metal pollution of the environment.
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Affiliation(s)
- Ruju Zhang
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, 300387, China; College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Caihong Song
- College of Life Science, Liaocheng University, Liaocheng, 252000, China
| | - Yue Zhao
- College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Guogang Zhang
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, 300387, China
| | - Lina Xie
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, 300387, China
| | - Zimin Wei
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, 300387, China; College of Life Science, Northeast Agricultural University, Harbin, 150030, China.
| | - Huiying Li
- College of Life Science, Northeast Agricultural University, Harbin, 150030, China
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Liu H, Cui Y, Zhou J, Penttinen P, Liu J, Zeng L, Chen Q, Gu Y, Zou L, Zhao K, Xiang Q, Yu X. Nickel mine soil is a potential source for soybean plant growth promoting and heavy metal tolerant rhizobia. PeerJ 2022; 10:e13215. [PMID: 35474688 PMCID: PMC9035279 DOI: 10.7717/peerj.13215] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 03/13/2022] [Indexed: 01/12/2023] Open
Abstract
Mine soil is not only barren but also contaminated by some heavy metals. It is unclear whether some rhizobia survived under extreme conditions in the nickel mine soil. Therefore, this study tries to isolate some effective soybean plant growth promoting and heavy metal resistant rhizobia from nickel mine soil, and to analyze their diversity. Soybean plants were used to trap rhizobia from the nickel mine soil. A total of 21 isolates were preliminarily identified as rhizobia, which were clustered into eight groups at 87% similarity level using BOXA1R-PCR fingerprinting technique. Four out of the eight representative isolates formed nodules on soybean roots with effectively symbiotic nitrogen-fixing and plant growth promoting abilities in the soybean pot experiment. Phylogenetic analysis of 16S rRNA, four housekeeping genes (atpD-recA-glnII-rpoB) and nifH genes assigned the symbiotic isolates YN5, YN8 and YN10 into Ensifer xinjiangense and YN11 into Rhizobium radiobacter, respectively. They also showed different tolerance levels to the heavy metals including cadmium, chromium, copper, nickel, and zinc. It was concluded that there were some plant growth promoting and heavy metal resistant rhizobia with the potential to facilitate phytoremediation and alleviate the effects of heavy metals on soybean cultivation in nickel mine soil, indicating a novel evidence for further exploring more functional microbes from the nickel mine soil.
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Affiliation(s)
- Han Liu
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yongliang Cui
- Sichuan Provincial Academy of Natural Resource and Sciences, Chengdu, Sichuan, China
| | - Jie Zhou
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Petri Penttinen
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Jiahao Liu
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Lan Zeng
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Qiang Chen
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Yunfu Gu
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Likou Zou
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Ke Zhao
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Quanju Xiang
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Xiumei Yu
- College of Resources, Sichuan Agricultural University, Chengdu, Sichuan, China
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