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Anusha P, Natarajan D, Rengarajan S, Alfarraj S, Kandasamy S. An assessment of metal absorption competence of indigenous metal tolerant bacterial species- an in-vitro study. ENVIRONMENTAL RESEARCH 2024; 251:118700. [PMID: 38499220 DOI: 10.1016/j.envres.2024.118700] [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: 12/31/2023] [Revised: 03/09/2024] [Accepted: 03/11/2024] [Indexed: 03/20/2024]
Abstract
Heavy metals pose a serious global threat to the environment. Hence, removing hazardous metals from soil samples has become complicated over the past few years. The current work looked into the remediation of heavy metals from aqueous solutions using a bacterial community and a unique bacterium obtained from metal-contaminated soil. In this investigation, the isolates of Bacillus anthracis A1-7, Bacillus. thuringiensis A1-3, Bacillus. cereus A1-5, and Pseudomonas aeruginosa A-33 actively demonstrated metal tolerances to various tested metals. Furthermore, an in-vitro biosorption study was performed under ideal concentration. The bacterial consortia achieved the highest biosorption effectiveness for Cu & Zn, 92.7% and 90.3%, respectively. When compared with a single bacterium, the group exhibited inferior Pb biosorption (86%). Since then, P. aeruginosa A33 has had the highest Pb biosorption. Finally, a bacterial consortium has devised an intriguing strategy for eliminating Cu and Pb from the polluted medium. P. aeruginosa A33 was found to be a mighty microbe that extracts Zn from polluted water. This metal-tolerant bacterium also exhibited specific proportions of selective commercially available antibiotics, which were analyzed using the Multiple Antibiotic Resistance (MAR) Index. In conclusion, these findings indicated that bacterial consortia composed of four bacterial isolates can remove metals from a metal-polluted medium.
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Affiliation(s)
- P Anusha
- Department of Chemistry, Kongunadu College of Engineering and Technology, Thottiam Trichy- 621215, India
| | - D Natarajan
- Department of Biotechnology, Periyar University, Salem, 636 011, Tamil Nadu, India.
| | - Sumathy Rengarajan
- Department of Biotechnology, Valliammal College for Women, E-9, Anna Nagar East, Chennai 600102, India
| | - Saleh Alfarraj
- Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Sabariswaran Kandasamy
- Department of Biotechnology, PSGR Krishnammal College for Women, Peelamedu, Coimbatore, Tamil Nadu, 641004, India.
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2
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Kwidzińska K, Zalewska M, Aksmann A, Kobos J, Mazur-Marzec H, Caban M. Multi-biomarker response of cyanobacteria Synechocystis salina and Microcystis aeruginosa to diclofenac. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134373. [PMID: 38678710 DOI: 10.1016/j.jhazmat.2024.134373] [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: 12/04/2023] [Revised: 02/14/2024] [Accepted: 04/19/2024] [Indexed: 05/01/2024]
Abstract
The cyanobacterial response to pharmaceuticals is less frequently investigated compared to green algae. Pharmaceuticals can influence not only the growth rate of cyanobacteria culture, but can also cause changes at the cellular level. The effect of diclofenac (DCF) as one of the for cyanobacteria has been rarely tested, and DCF has never been applied with cellular biomarkers. The aim of this work was to test the response of two unicellular cyanobacteria (Synechocystis salina and Microcystis aeruginosa) toward DCF (100 mg L-1) under photoautotrophic growth conditions. Such endpoints were analyzed as cells number, DCF uptake, the change in concentrations of photosynthetic pigments, the production of toxins, and chlorophyll a in vivo fluorescence. It was noted that during a 96 h exposure, cell proliferation was not impacted. Nevertheless, a biochemical response was observed. The increased production of microcystin was noted for M. aeruginosa. Due to the negligible absorption of DCF into cells, it is possible that the biochemical changes are induced by an external signal. The application of non-standard biomarkers demonstrates the effect of DCF on microorganism metabolism without a corresponding effect on biomass. The high resistance of cyanobacteria to DCF and the stimulating effect of DCF on the secretion of toxins raise concerns for environment biodiversity.
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Affiliation(s)
- Klaudia Kwidzińska
- University of Gdansk, Faculty of Chemistry, Department of Environmental Analysis, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Martyna Zalewska
- University of Gdansk, Faculty of Biology, Department of Plant Experimental Biology and Biotechnology, ul. Wita Stwosza 59, 80-308 Gdańsk, Poland
| | - Anna Aksmann
- University of Gdansk, Faculty of Biology, Department of Plant Experimental Biology and Biotechnology, ul. Wita Stwosza 59, 80-308 Gdańsk, Poland
| | - Justyna Kobos
- University of Gdansk, Faculty of Oceanography and Geography, Department of Marine Biology and Biotechnology, al. Marszałka Piłsudskiego 46, 81-378 Gdynia, Poland
| | - Hanna Mazur-Marzec
- University of Gdansk, Faculty of Oceanography and Geography, Department of Marine Biology and Biotechnology, al. Marszałka Piłsudskiego 46, 81-378 Gdynia, Poland
| | - Magda Caban
- University of Gdansk, Faculty of Chemistry, Department of Environmental Analysis, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
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Najar IN, Sharma P, Das R, Tamang S, Mondal K, Thakur N, Gandhi SG, Kumar V. From waste management to circular economy: Leveraging thermophiles for sustainable growth and global resource optimization. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 360:121136. [PMID: 38759555 DOI: 10.1016/j.jenvman.2024.121136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 04/24/2024] [Accepted: 05/09/2024] [Indexed: 05/19/2024]
Abstract
Waste of any origin is one of the most serious global and man-made concerns of our day. It causes climate change, environmental degradation, and human health problems. Proper waste management practices, including waste reduction, safe handling, and appropriate treatment, are essential to mitigate these consequences. It is thus essential to implement effective waste management strategies that reduce waste at the source, promote recycling and reuse, and safely dispose of waste. Transitioning to a circular economy with policies involving governments, industries, and individuals is essential for sustainable growth and waste management. The review focuses on diverse kinds of environmental waste sources around the world, such as residential, industrial, commercial, municipal services, electronic wastes, wastewater sewerage, and agricultural wastes, and their challenges in efficiently valorizing them into useful products. It highlights the need for rational waste management, circularity, and sustainable growth, and the potential of a circular economy to address these challenges. The article has explored the role of thermophilic microbes in the bioremediation of waste. Thermophiles known for their thermostability and thermostable enzymes, have emerged to have diverse applications in biotechnology and various industrial processes. Several approaches have been explored to unlock the potential of thermophiles in achieving the objective of establishing a zero-carbon sustainable bio-economy and minimizing waste generation. Various thermophiles have demonstrated substantial potential in addressing different waste challenges. The review findings affirm that thermophilic microbes have emerged as pivotal and indispensable candidates for harnessing and valorizing a range of environmental wastes into valuable products, thereby fostering the bio-circular economy.
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Affiliation(s)
- Ishfaq Nabi Najar
- Fermentation and Microbial Biotechnology Division, CSIR IIIM, Jammu, India
| | - Prayatna Sharma
- Department of Microbiology, School of Life Sciences, Sikkim University, Gairigaon, Tadong, Gangtok, 737102, Sikkim, India
| | - Rohit Das
- Department of Microbiology, School of Life Sciences, Sikkim University, Gairigaon, Tadong, Gangtok, 737102, Sikkim, India
| | - Sonia Tamang
- Department of Microbiology, School of Life Sciences, Sikkim University, Gairigaon, Tadong, Gangtok, 737102, Sikkim, India
| | | | - Nagendra Thakur
- Department of Microbiology, School of Life Sciences, Sikkim University, Gairigaon, Tadong, Gangtok, 737102, Sikkim, India
| | | | - Vinod Kumar
- Fermentation and Microbial Biotechnology Division, CSIR IIIM, Jammu, India.
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Zafar S, Ashraf A, Hayat S, Siddique MH, Waseem M, Hassan M, Qaisar H, Muzammil S. Isolation and characterization of novel cadmium-resistant Escherichia fergusonii ZSF-15 from industrial effluent for flocculant production and antioxidant enzyme activity. ENVIRONMENTAL MONITORING AND ASSESSMENT 2024; 196:412. [PMID: 38565815 DOI: 10.1007/s10661-024-12545-x] [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: 09/19/2023] [Accepted: 03/16/2024] [Indexed: 04/04/2024]
Abstract
Cadmium (Cd) is a highly toxic metal that frequently contaminates our environment. In this study, the bioflocculant-producing, cadmium-resistant Escherichia fergusonii ZSF-15 was characterized from Paharang drain, Bawa Chak, Faisalabad, Pakistan. The Cd-resistant E. fergusonii was used to determine the bioflocculant production using yeast-peptone-glycerol medium (pH 6.5) supplemented with 50 mg L-1 of Cd. The culture was incubated for 3 days at 37 °C in a rotary shaker at 120 rpm. The fermentation broth was centrifuged at 4000 g for 10 min after the incubation period. The maximum flocculating activity by isolate ZSF-15 was found to be 71.4% after 48 h of incubation. According to the Fourier transform infrared spectroscopy analysis, the bioflocculant produced by strain ZSF-15 was comprised of typical polysaccharide and protein, i.e. hydroxyl, carboxyl, and amino groups. The strain ZSF-15 exhibited bioflocculant activity at range of pH (6-8) and temperature (35-50℃). Maximum flocculation activity (i.e. 71%) was observed at 47℃, whereas 63% flocculation production was observed at pH 8. In the present study, antioxidant enzyme profile of ZSF-15 was also evaluated under cadmium stress. A significant increase in antioxidant enzymes including superoxide dismutase (118%) and ascorbate peroxidase (28%) was observed, whereas contents of catalase (86%), glutathione transferase (13%), and peroxidase (8%) were decreased as compared to control.
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Affiliation(s)
- Saima Zafar
- Department of Zoology, Government College University Faisalabad, Faisalabad, 38000, Punjab, Pakistan
| | - Asma Ashraf
- Department of Zoology, Government College University Faisalabad, Faisalabad, 38000, Punjab, Pakistan
| | - Sumreen Hayat
- Institute of Microbiology, Government College University Faisalabad, Faisalabad, 38000, Punjab, Pakistan
| | - Muhammad Hussnain Siddique
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad, 38000, Punjab, Pakistan
| | - Muhammad Waseem
- Department of Environmental Sciences, Government College University Faisalabad, Faisalabad, 38000, Punjab, Pakistan
| | - Mudassir Hassan
- Department of Zoology, Government College University Faisalabad, Faisalabad, 38000, Punjab, Pakistan
| | - Hira Qaisar
- Department of Zoology, Government College University Faisalabad, Faisalabad, 38000, Punjab, Pakistan
| | - Saima Muzammil
- Institute of Microbiology, Government College University Faisalabad, Faisalabad, 38000, Punjab, Pakistan.
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Sonthiphand P, Rueangmongkolrat N, Uthaipaisanwong P, Kusonmano K, Mhuantong W, Termsaithong T, Limthamprasert C, Chotpantarat S, Luepromchai E. Soil Microbiomes and their Arsenic Functional Genes in Chronically High-Arsenic Contaminated Soils. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2024; 112:49. [PMID: 38466428 DOI: 10.1007/s00128-024-03866-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 01/31/2024] [Indexed: 03/13/2024]
Abstract
Microbial arsenic transformations play essential roles in controlling pollution and ameliorating risk. This study combined high-throughput sequencing and PCR-based approaches targeting both the 16 S rRNA and arsenic functional genes to investigate the temporal and spatial dynamics of the soil microbiomes impacted by high arsenic contamination (9.13 to 911.88 mg/kg) and to investigate the diversity and abundance of arsenic functional genes in soils influenced by an arsenic gradient. The results showed that the soil microbiomes were relatively consistent and mainly composed of Actinobacteria (uncultured Gaiellales and an unknown_67 - 14 bacterium), Proteobacteria, Firmicutes (particularly, Bacillus), Chloroflexi, and Acidobacteria (unknown_Subgroup_6). Although a range of arsenic functional genes (e.g., arsM, arsC, arrA, and aioA) were identified by shotgun metagenomics, only the arsM gene was detected by the PCR-based method. The relative abundance of the arsM gene accounted for 0.20%-1.57% of the total microbial abundance. Combining all analyses, arsenic methylation mediated by the arsM gene was proposed to be a key process involved in the arsenic biogeochemical cycle and mitigation of arsenic toxicity. This study advances our knowledge about arsenic mechanisms over the long-term in highly contaminated soils.
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Affiliation(s)
- Prinpida Sonthiphand
- Department of Biology, Faculty of Science, Mahidol University, 272 Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.
| | - Nattanan Rueangmongkolrat
- Department of Biology, Faculty of Science, Mahidol University, 272 Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Pichahpuk Uthaipaisanwong
- Systems Biology and Bioinformatics Research Group, Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi, Bang Khun Thian, Bangkok, Thailand
| | - Kanthida Kusonmano
- Systems Biology and Bioinformatics Research Group, Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi, Bang Khun Thian, Bangkok, Thailand
- Bioinformatics and Systems Biology Program, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bang Khun Thian, Bangkok, Thailand
| | - Wuttichai Mhuantong
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Pathumthani, Thailand
| | - Teerasit Termsaithong
- Learning Institute, King Mongkut's University of Technology Thonburi, Bangkok, Thailand
- Theoretical and Computational Physics (TCP) group, Center of Excellence in Theoretical and Computational Science (TaCS-CoE), King Mongkut's University of Technology Thonburi, Bangkok, Thailand
| | - Chanida Limthamprasert
- Department of Biology, Faculty of Science, Mahidol University, 272 Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand
| | - Srilert Chotpantarat
- Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Research Program on Controls of Hazardous Contaminants in Raw Water Resources for Water Scarcity Resilience, Center of Excellence on Hazardous Substance Management (HSM), Chulalongkorn University, Bangkok, Thailand
- Research Unit of Site Remediation on Metals Management from Industry and Mining (Site Rem), Chulalongkorn University, Bangkok, Thailand
| | - Ekawan Luepromchai
- Microbial Technology for Marine Pollution Treatment Research Unit, Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
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Firincă C, Zamfir LG, Constantin M, Răut I, Capră L, Popa D, Jinga ML, Baroi AM, Fierăscu RC, Corneli NO, Postolache C, Doni M, Gurban AM, Jecu L, Șesan TE. Microbial Removal of Heavy Metals from Contaminated Environments Using Metal-Resistant Indigenous Strains. J Xenobiot 2023; 14:51-78. [PMID: 38249101 PMCID: PMC10801475 DOI: 10.3390/jox14010004] [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: 11/15/2023] [Revised: 12/19/2023] [Accepted: 12/27/2023] [Indexed: 01/23/2024] Open
Abstract
Contamination of soil with heavy metals has become a matter of global importance due to its impact on agriculture, environmental integrity, and therefore human health and safety. Several microbial strains isolated from soil contaminated by long-term chemical and petrochemical activities were found to manifest various levels of tolerance to Cr, Pb, and Zn, out of which Bacillus marisflavi and Trichoderma longibrachiatum exhibited above-moderate tolerance. The concentrations of target heavy metals before and after bioremediation were determined using electrochemical screen-printed electrodes (SPE) modified with different nanomaterials. The morpho-structural SEM/EDX analyses confirmed the presence of metal ions on the surface of the cell, with metal uptake being mediated by biosorption with hydroxyl, carboxyl, and amino groups as per FTIR observations. T. longibrachiatum was observed to pose a higher bioremediation potential compared to B. marisflavi, removing 87% of Cr and 67% of Zn, respectively. Conversely, B. marisflavi removed 86% of Pb from the solution, compared to 48% by T. longibrachiatum. Therefore, the fungal strain T. longibrachiatum could represent a viable option for Cr and Zn bioremediation strategies, whereas the bacterial strain B. marisflavi may be used in Pb bioremediation applications.
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Affiliation(s)
- Cristina Firincă
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
- Department of Botany and Microbiology, Faculty of Biology, University of Bucharest, 91–95 Spl. Independenței, 050095 Bucharest, Romania
| | - Lucian-Gabriel Zamfir
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
| | - Mariana Constantin
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
- Department of Pharmacy, Faculty of Pharmacy, University Titu Maiorescu of Bucharest, 040441 Bucharest, Romania
| | - Iuliana Răut
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
| | - Luiza Capră
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
| | - Diana Popa
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
| | - Maria-Lorena Jinga
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
| | - Anda Maria Baroi
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
| | - Radu Claudiu Fierăscu
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
| | - Nicoleta Olguța Corneli
- National Institute of Research and Development for Microbiology and Immunology—Cantacuzino, 103 Spl. Independenței, 050096 Bucharest, Romania
| | - Carmen Postolache
- Department of Botany and Microbiology, Faculty of Biology, University of Bucharest, 91–95 Spl. Independenței, 050095 Bucharest, Romania
| | - Mihaela Doni
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
| | - Ana-Maria Gurban
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
| | - Luiza Jecu
- Biotechnology and Bioanalysis Departments, National Institute of Research and Development in Chemistry and Petrochemistry—ICECHIM, 202 Spl. Independenței, 060021 Bucharest, Romania; (C.F.); (M.D.)
| | - Tatiana Eugenia Șesan
- Department of Botany and Microbiology, Faculty of Biology, University of Bucharest, 91–95 Spl. Independenței, 050095 Bucharest, Romania
- Field Crop Section, Academy of Agricultural and Forestry Sciences, Bd Mărăști 61, 011464 Bucharest, Romania
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Farfan Pajuelo DG, Carpio Mamani M, Maraza Choque GJ, Chachaque Callo DM, Cáceda Quiroz CJ. Effect of Lyoprotective Agents on the Preservation of Survival of a Bacillus cereus Strain PBG in the Freeze-Drying Process. Microorganisms 2023; 11:2705. [PMID: 38004717 PMCID: PMC10673073 DOI: 10.3390/microorganisms11112705] [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: 10/07/2023] [Revised: 10/25/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023] Open
Abstract
Lyophilization is a widely employed long-term preservation method in which the bacterial survival rate largely depends on the cryoprotectant used. Bacillus cereus strain PBC was selected for its ability to thrive in environments contaminated with arsenic, lead, and cadmium, tolerate 500 ppm of free cyanide, and the presence of genes such as ars, cad, ppa, dap, among others, associated with the bioremediation of toxic compounds and enterotoxins (nheA, nheB, nheC). Following lyophilization, the survival rates for Mannitol 2.5%, Mannitol 10%, and Glucose 1% were 98.02%, 97.12%, and 96.30%, respectively, with the rates being lower than 95% for other sugars. However, during storage, for the same sugars, the survival rates were 78.71%, 97.12%, and 99.97%, respectively. In the cake morphology, it was found that the lyophilized morphology showed no relationship with bacterial survival rate. The best cryoprotectant for the PBC strain was 1% glucose since it maintained constant and elevated bacterial growth rates during storage, ensuring that the unique characteristics of the bacterium were preserved over time. These findings hold significant implications for research as they report a new Bacillus cereus strain with the potential to be utilized in bioremediation processes.
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Affiliation(s)
| | | | | | | | - César Julio Cáceda Quiroz
- Bioremediation Laboratory, Jorge Basadre Grohmann National University, Tacna 230001, Peru; (D.G.F.P.); (M.C.M.); (G.J.M.C.); (D.M.C.C.)
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Bellotti D, Leveraro S, Hecel A, Remelli M. Investigation of metal interactions with YrpE protein of Bacillus subtilis by a polyhistidine peptide model. Anal Biochem 2023; 680:115315. [PMID: 37689096 DOI: 10.1016/j.ab.2023.115315] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/04/2023] [Accepted: 09/05/2023] [Indexed: 09/11/2023]
Abstract
The use of model peptides that can simulate the behaviour of a protein domain is a very successful analytical method to study the metal coordination sites in biological systems. Here we study zinc and copper binding ability of the sequence HTHEHSHDHSHAH, which serves as model for the metal interactions with YrpE, a putative metal-binding protein of the ZinT family identified in Bacillus subtilis. Compared to other ZinT proteins secreted by Gram-negative bacteria, the metal-coordination properties of YrpE N-terminal histidine-rich domain have not been yet characterized. Different independent analytical methods, aimed at providing information on the stability and structure of the formed species, have been employed, including potentiometric titrations, electrospray ionization mass spectrometry, UV-Vis spectrophotometry, circular dichroism and electron paramagnetic resonance spectroscopy. The obtained speciation models and equilibrium constants allowed to compare the metal-binding ability of the investigated polyhistidine sequence with that of other well-known histidine-rich peptides. Our thermodynamic results revealed that the YrpE domain HTHEHSHDHSHAH forms more stable metal complexes than other His-rich domains of similar ZinT proteins. Moreover, the studied peptide, containing the alternated (-XH-)n motif, proved to be even more effective than the His6-tag (widely used in immobilized metal ion affinity chromatography) in binding zinc ions.
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Affiliation(s)
- Denise Bellotti
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, 44121, Ferrara, Italy; Faculty of Chemistry, University of Wrocław, 50-383, Wrocław, Poland.
| | - Silvia Leveraro
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, 44121, Ferrara, Italy.
| | - Aleksandra Hecel
- Faculty of Chemistry, University of Wrocław, 50-383, Wrocław, Poland.
| | - Maurizio Remelli
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, 44121, Ferrara, Italy.
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9
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Ma L, Zhou Y, Wang A, Li Q. A potential heavy metals detoxification system in composting: Biotic and abiotic synergy mediated by shell powder. BIORESOURCE TECHNOLOGY 2023; 386:129576. [PMID: 37506928 DOI: 10.1016/j.biortech.2023.129576] [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: 06/10/2023] [Revised: 07/18/2023] [Accepted: 07/25/2023] [Indexed: 07/30/2023]
Abstract
Regulating heavy metal resistance genes (HMRGs) was an effective method for heavy metal resistant bacteria (HMRB) to cope with heavy metal stress during dairy manure composting. This research aimed to investigate heavy metal detoxification mediated by shell powder (SP) in composting and the response of HMRB and HMRGs to changes in heavy metal bioavailability during composting. Research showed that SP additive reduced the bioavailability of Zu, Cu, and Mn by 10.64%, 13.90% and 14.14%, respectively. SP increased the composition percentage of humic acid (HA) in humus (HS) by 8%. SP enhanced the resistance of Actinobacteria to heavy metals and improved the regulation of HMRGs. Correlation analysis demonstrated that the bioavailability of heavy metals was positively correlated with most HMRGs. HA was significantly negatively correlated with the bioavailability of Zn, Cu and Mn. Therefore, SP additive could be a novel strategy for heavy metals detoxification during composting.
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Affiliation(s)
- Liangcai Ma
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Yucheng Zhou
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Ao Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Qunliang Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
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10
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Leñini C, Rodriguez Ayala F, Goñi AJ, Rateni L, Nakamura A, Grau RR. Probiotic properties of Bacillus subtilis DG101 isolated from the traditional Japanese fermented food nattō. Front Microbiol 2023; 14:1253480. [PMID: 37840737 PMCID: PMC10569484 DOI: 10.3389/fmicb.2023.1253480] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 08/28/2023] [Indexed: 10/17/2023] Open
Abstract
Spore-forming probiotic bacteria offer interesting properties as they have an intrinsic high stability, and when consumed, they are able to survive the adverse conditions encountered during the transit thorough the host gastrointestinal (GI) tract. A traditional healthy food, nattō, exists in Japan consisting of soy fermented by the spore-forming bacterium Bacillus subtilis natto. The consumption of nattō is linked to many beneficial health effects, including the prevention of high blood pressure, osteoporosis, and cardiovascular-associated disease. We hypothesize that the bacterium B. subtilis natto plays a key role in the beneficial effects of nattō for humans. Here, we present the isolation of B. subtilis DG101 from nattō and its characterization as a novel spore-forming probiotic strain for human consumption. B. subtilis DG101 was non-hemolytic and showed high tolerance to lysozyme, low pH, bile salts, and a strong adherence ability to extracellular matrix proteins (i.e., fibronectin and collagen), demonstrating its potential application for competitive exclusion of pathogens. B. subtilis DG101 forms robust liquid and solid biofilms and expresses several extracellular enzymes with activity against food diet-associated macromolecules (i.e., proteins, lipids, and polysaccharides) that would be important to improve food diet digestion by the host. B. subtilis DG101 was able to grow in the presence of toxic metals (i.e., chromium, cadmium, and arsenic) and decreased their bioavailability, a feature that points to this probiotic as an interesting agent for bioremediation in cases of food and water poisoning with metals. In addition, B. subtilis DG101 was sensitive to antibiotics commonly used to treat infections in medical settings, and at the same time, it showed a potent antimicrobial effect against pathogenic bacteria and fungi. In mammalians (i.e., rats), B. subtilis DG101 colonized the GI tract, and improved the lipid and protein serum homeostasis of animals fed on the base of a normal- or a deficient-diet regime (dietary restriction). In the animal model for longevity studies, Caenorhabditis elegans, B. subtilis DG101 significantly increased the animal lifespan and prevented its age-related behavioral decay. Overall, these results demonstrate that B. subtilis DG101 is the key component of nattō with interesting probiotic properties to improve and protect human health.
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Affiliation(s)
- Cecilia Leñini
- Departamento de Microbiología, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Facundo Rodriguez Ayala
- Departamento de Microbiología, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Anibal Juan Goñi
- Departamento de Microbiología, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Liliana Rateni
- Departamento de Microbiología, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Akira Nakamura
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Roberto Ricardo Grau
- Departamento de Microbiología, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
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Kamyab H, Chelliapan S, Hayder G, Yusuf M, Taheri MM, Rezania S, Hasan M, Yadav KK, Khorami M, Farajnezhad M, Nouri J. Exploring the potential of metal and metal oxide nanomaterials for sustainable water and wastewater treatment: A review of their antimicrobial properties. CHEMOSPHERE 2023; 335:139103. [PMID: 37271472 DOI: 10.1016/j.chemosphere.2023.139103] [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: 02/27/2023] [Revised: 05/19/2023] [Accepted: 05/31/2023] [Indexed: 06/06/2023]
Abstract
Metallic nanoparticles (NPs) are of particular interest as antimicrobial agents in water and wastewater treatment due to their broad suppressive range against bacteria, viruses, and fungi commonly found in these environments. This review explores the potential of different types of metallic NPs, including zinc oxide, gold, copper oxide, and titanium oxide, for use as effective antimicrobial agents in water and wastewater treatment. This is due to the fact that metallic NPs possess a broad suppressive range against bacteria, viruses, as well as fungus. In addition to that, NPs are becoming an increasingly popular alternative to antibiotics for treating bacterial infections. Despite the fact that most research has been focused on silver NPs because of the antibacterial qualities that are known to be associated with them, curiosity about other metallic NPs as potential antimicrobial agents has been growing. Zinc oxide, gold, copper oxide, and titanium oxide NPs are included in this category since it has been demonstrated that these elements have antibacterial properties. Inducing oxidative stress, damage to the cellular membranes, and breakdowns throughout the protein and DNA chains are some of the ways that metallic NPs can have an influence on microbial cells. The purpose of this review was to engage in an in-depth conversation about the current state of the art regarding the utilization of the most important categories of metallic NPs that are used as antimicrobial agents. Several approaches for the synthesis of metal-based NPs were reviewed, including physical and chemical methods as well as "green synthesis" approaches, which are synthesis procedures that do not involve the employment of any chemical agents. Moreover, additional pharmacokinetics, physicochemical properties, and the toxicological hazard associated with the application of silver NPs as antimicrobial agents were discussed.
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Affiliation(s)
- Hesam Kamyab
- Faculty of Architecture and Urbanism, UTE University, Calle Rumipamba S/N and Bourgeois, Quito, Ecuador; Institute of Energy Infrastructure (IEI), Universiti Tenaga Nasional (UNITEN), Selangor Darul Ehsan, Kajang, 43000, Malaysia; Department of Biomaterials, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai, 600 077, India; Process Systems Engineering Centre (PROSPECT), Faculty of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia.
| | - Shreeshivadasan Chelliapan
- Engineering Department, Razak Faculty of Technology and Informatics, Universiti Teknologi Malaysia, Jln Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
| | - Gasim Hayder
- Institute of Energy Infrastructure (IEI), Universiti Tenaga Nasional (UNITEN), Selangor Darul Ehsan, Kajang, 43000, Malaysia; Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional (UNITEN), Selangor Darul Ehsan, Kajang, 43000, Malaysia
| | - Mohammad Yusuf
- Institute of Hydrocarbon Recovery, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak, 32610, Malaysia
| | - Mohammad Mahdi Taheri
- Department of Pharmaceutical Biomaterials, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Shahabaldin Rezania
- Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea
| | - Mudassir Hasan
- Department of Chemical Engineering King Khalid University, Abha, Saudi Arabia
| | - Krishna Kumar Yadav
- Faculty of Science and Technology, Madhyanchal Professional University, Ratibad, Bhopal, 462044, India; Environmental and Atmospheric Sciences Research Group, Scientific Research Center, Al-Ayen University, Thi-Qar, Nasiriyah, 64001, Iraq
| | - Majid Khorami
- Faculty of Architecture and Urbanism, UTE University, Calle Rumipamba S/N and Bourgeois, Quito, Ecuador; Facultad de Ingeniería en Mecánica y Ciencias de la Producción, Escuela Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Ecuado
| | - Mohammad Farajnezhad
- Azman Hashim International Business School (AHIBS), Universiti Teknologi Malaysia Kuala Lumpur, 54100, Kuala Lumpur, Malaysia
| | - J Nouri
- Department of Environmental Health Engineering, Tehran University of Medical Sciences, Tehran, Iran
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12
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Zelaya-Molina LX, Guerra-Camacho JE, Ortiz-Alvarez JM, Vigueras-Cortés JM, Villa-Tanaca L, Hernández-Rodríguez C. Plant growth-promoting and heavy metal-resistant Priestia and Bacillus strains associated with pioneer plants from mine tailings. Arch Microbiol 2023; 205:318. [PMID: 37615783 DOI: 10.1007/s00203-023-03650-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/26/2023] [Accepted: 08/06/2023] [Indexed: 08/25/2023]
Abstract
Open mine tailings dams are extreme artificial environments containing sizeable potentially toxic elements (PTEs), including heavy metals (HMs), transition metals, and metalloids. Furthermore, these tailings have nutritional deficiencies, including assimilable phosphorus sources, organic carbon, and combined nitrogen, preventing plant colonization. Bacteria, that colonize these environments, have mechanisms to tolerate the selective pressures of PTEs. In this work, several Priestia megaterium (formerly Bacillus megaterium), Bacillus mojavensis, and Bacillus subtilis strains were isolated from bulk tailings, anthills, rhizosphere, and endosphere of pioneer plants from abandoned mine tailings in Zacatecas, Mexico. Bacillus spp. tolerated moderate HMs concentrations, produced siderophores and indole-3-acetic acid (IAA), solubilized phosphates, and reduced acetylene in the presence of HMs. The strains harbored different PIB-type ATPase genes encoding for efflux pumps and Cation Diffusion Facilitator (CDF) genes. Moreover, nifH and nifD nitrogenase genes were detected in P. megaterium and B. mojavensis genomic DNA. They showed similarity with sequences of the beta-Proteobacteria species, which may represent likely horizontal transfer events. These Bacillus species precede the colonization of mine tailings by plants. Their phenotypic and genotypic features could be essential in the natural recovery of the sites by reducing the oxidative stress of HMs, fixing nitrogen, solubilizing phosphate, and accumulating organic carbon. These traits of the strains reflect the adaptations of Bacillus species to the mine tailings environment and could contribute to the success of phytoremediation efforts.
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Affiliation(s)
- Lily X Zelaya-Molina
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prol. de Carpio y Plan de Ayala S/N. Col. Sto. Tomás, C.P. 11340, Ciudad de México, México
- Centro Nacional de Recursos Genéticos-INIFAP, Boulevard de La Biodiversidad 400, Rancho Las Cruces, C.P. 47600, Tepatitlán de Morelos, Jalisco, México
| | - Jairo E Guerra-Camacho
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prol. de Carpio y Plan de Ayala S/N. Col. Sto. Tomás, C.P. 11340, Ciudad de México, México
| | - Jossue M Ortiz-Alvarez
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prol. de Carpio y Plan de Ayala S/N. Col. Sto. Tomás, C.P. 11340, Ciudad de México, México
- Programa "Investigadoras E Investigadores Por México". Consejo Nacional de Humanidades, Ciencias y Tecnologías (CONAHCyT), Av. de los Insurgentes Sur 1582, Crédito Constructor, Benito Juárez, C.P. 03940, Ciudad de México, México
| | - Juan M Vigueras-Cortés
- Laboratorio de Prototipos de Agua, Centro Interdisciplinario de Investigación Para El Desarrollo Integral Regional, IPN CIIDIR Durango, Sigma 119, Fracc. 20 de Noviembre II, C.P. 34220, Durango, Durango, México
| | - Lourdes Villa-Tanaca
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prol. de Carpio y Plan de Ayala S/N. Col. Sto. Tomás, C.P. 11340, Ciudad de México, México
| | - César Hernández-Rodríguez
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prol. de Carpio y Plan de Ayala S/N. Col. Sto. Tomás, C.P. 11340, Ciudad de México, México.
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13
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Oleńska E, Małek W, Wójcik M, Szopa S, Swiecicka I, Aleksandrowicz O, Włostowski T, Zawadzka W, Sillen WMA, Vangronsveld J, Cholakova I, Langill T, Thijs S. Bacteria associated with Zn-hyperaccumulators Arabidopsis halleri and Arabidopsis arenosa from Zn-Pb-Cd waste heaps in Poland as promising tools for bioremediation. Sci Rep 2023; 13:12606. [PMID: 37537323 PMCID: PMC10400580 DOI: 10.1038/s41598-023-39852-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 08/01/2023] [Indexed: 08/05/2023] Open
Abstract
To identify metal adapted bacteria equipped with traits positively influencing the growth of two hyperaccumulator plant species Arabidopsis arenosa and Arabidopsis halleri, we isolated bacteria inhabiting rhizosphere and vegetative tissues (roots, basal and stem leaves) of plants growing on two old Zn-Pb-Cd waste heaps in Bolesław and Bukowno (S. Poland), and characterized their potential plant growth promoting (PGP) traits as well as determined metal concentrations in rhizosphere and plant tissues. To determine taxonomic position of 144 bacterial isolates, 16S rDNA Sanger sequencing was used. A metabolic characterization of isolated strains was performed in vitro using PGP tests. A. arenosa and A. halleri accumulate high amounts of Zn in their tissues, especially in stem leaves. Among in total 22 identified bacterial taxa, the highest level of the taxonomical diversity (H' = 2.01) was revealed in A. halleri basal leaf endophytes originating from Bukowno waste heap area. The 96, 98, 99, and 98% of investigated strains showed tolerant to Cd, Zn, Pb and Cu, respectively. Generally, higher percentages of bacteria could synthesize auxins, siderophores, and acetoin as well as could solubilize phosphate. Nine of waste heap origin bacterial strains were tolerant to toxic metals, showed in vitro PGP traits and are potential candidates for bioremediation.
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Affiliation(s)
- Ewa Oleńska
- Faculty of Biology, University of Bialystok, 1J Ciołkowski, 15-245, Bialystok, Poland.
| | - Wanda Małek
- Faculty of Biology and Biotechnology, Institute of Biological Sciences, Maria Curie-Skłodowska University, 19 Akademicka, 20-033, Lublin, Poland
| | - Małgorzata Wójcik
- Faculty of Biology and Biotechnology, Institute of Biological Sciences, Maria Curie-Skłodowska University, 19 Akademicka, 20-033, Lublin, Poland
| | - Sebastian Szopa
- SHIM-POL A.M. Borzymowski, 5 Lubomirski, 05-080, Izabelin, Poland
| | - Izabela Swiecicka
- Faculty of Biology, University of Bialystok, 1J Ciołkowski, 15-245, Bialystok, Poland
- Laboratory of Applied Microbiology, University of Bialystok, 1J Ciołkowski, 15-245, Bialystok, Poland
| | | | - Tadeusz Włostowski
- Faculty of Biology, University of Bialystok, 1J Ciołkowski, 15-245, Bialystok, Poland
| | - Weronika Zawadzka
- Faculty of Biology, University of Bialystok, 1J Ciołkowski, 15-245, Bialystok, Poland
| | - Wouter M A Sillen
- Faculty of Environmental Biology, Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Jaco Vangronsveld
- Faculty of Biology and Biotechnology, Institute of Biological Sciences, Maria Curie-Skłodowska University, 19 Akademicka, 20-033, Lublin, Poland
- Faculty of Environmental Biology, Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Iva Cholakova
- Faculty of Environmental Biology, Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Tori Langill
- Faculty of Environmental Biology, Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Sofie Thijs
- Faculty of Environmental Biology, Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium
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14
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Mafulul SG, Joel EB, Gushit J. Health risk assessment of potentially toxic elements (PTEs) concentrations in soil and fruits of selected perennial economic trees growing naturally in the vicinity of the abandoned mining ponds in Kuba, Bokkos Local Government Area (LGA) Plateau State, Nigeria. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:5893-5914. [PMID: 37183215 DOI: 10.1007/s10653-023-01600-0] [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: 07/12/2022] [Accepted: 04/27/2023] [Indexed: 05/16/2023]
Abstract
This study was designed to determine the level of potentially toxic elements (PTEs) contamination in soil and selected fruits and assesses the health risk of inhabitants in the abandoned tin mining community in Kuba, Bokkos LGA. Samples of the abandoned mine soil and selected fruits mango (Magnifera indica), guava (Psidium guajava), avocado pear (Persea americana), and banana (Musa spp)) from the vicinity of the abandoned mine were analyzed for the presence of arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), and zinc (Zn) using inductively coupled plasma mass spectrometry (ICP-MS). The results showed that the levels of all the PTEs analysed in the abandoned mine soil samples were significantly (p < 0.05) higher than their corresponding values in the control soil from the non-mining area. Except for Cd, the mean concentrations of As, Cr, Cu, Mn, Ni, and Pb were significantly higher than the FAO/WHO maximum permissible limit. Except for Zn in guava fruits and Cd in avocado fruits, the mean concentration of PTEs in fruits from abandoned mines was significantly (p < 0.05) higher than their corresponding control values. In contrast, the mean levels of As, Cr, Cu, Mn, Ni, and Pb in the investigated fruits were significantly (p < 0.05) higher than FAO/WHO maximum permissible limits established for fruits. The studied fruits remarkably took up and bioaccumulated PTEs from the abandoned mine soil. Mango fruit significantly bioaccumulated As (5.40), Cd (3.40), and Zn (2.81). Guava fruit bioaccumulated As (1.50) and Cd (4.60), while avocado bioaccumulated As (3.53), Cd (3.80), and Zn (6.48). Banana bioaccumulated As (0.96), Cd (0.80), and Zn (6.78). The hazard quotient values for PTEs investigated in fruits for adults, and children were several folds greater than 1. The hazard index (HI) for the PTEs through consuming fruits for children and adults was greater than 1, indicating that possible health risks exist for both local children and adults. However, the HI values for the children were higher than those for adults, implying that children were exposed to more potential noncarcinogenic health risks from PTEs than adults. The total cancer risk (TCR) values for Cr and Ni for all the fruits studied were within 10-3-10-1, which is several-fold higher than the permissible limits (10-6 and < 10-4), indicating high carcinogenic risk. TCR values for Cd and Pb in all the fruits, except for Cd in guava and avocado fruits for children, were within the range of 10-5-10-4, indicating that they are associated with moderate risk. The CR values for all the PTEs in all the fruits for adults and children except for mango fruit adults were within 10-2-10-1, indicating high carcinogenic risk. In conclusion, the results and risk assessment provided by this study indicate that human exposure to fruits from abandoned mines suggests a high vulnerability of the local community to PTE toxicity. Long-term preventive measures to safeguard the health of the residents need to be put in place.
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Affiliation(s)
- Simon Gabriel Mafulul
- Department of Biochemistry, Faculty of Basic Medical Sciences, University of Jos, P.M.B. 2084, Jos, Plateau State, Nigeria.
| | - Enoch Banbilbwa Joel
- Department of Biochemistry, Faculty of Basic Medical Sciences, University of Jos, P.M.B. 2084, Jos, Plateau State, Nigeria
| | - John Gushit
- Department of Science Laboratory Technology, Faculty of Natural Sciences, University of Jos, P.M.B. 2084, Jos, Plateau State, Nigeria
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Kulkova I, Dobrzyński J, Kowalczyk P, Bełżecki G, Kramkowski K. Plant Growth Promotion Using Bacillus cereus. Int J Mol Sci 2023; 24:ijms24119759. [PMID: 37298706 DOI: 10.3390/ijms24119759] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 05/25/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023] Open
Abstract
Plant growth-promoting bacteria (PGPB) appear to be a sensible competitor to conventional fertilization, including mineral fertilizers and chemical plant protection products. Undoubtedly, one of the most interesting bacteria exhibiting plant-stimulating traits is, more widely known as a pathogen, Bacillus cereus. To date, several environmentally safe strains of B. cereus have been isolated and described, including B. cereus WSE01, MEN8, YL6, SA1, ALT1, ERBP, GGBSTD1, AK1, AR156, C1L, and T4S. These strains have been studied under growth chamber, greenhouse, and field conditions and have shown many significant traits, including indole-3-acetic acid (IAA) and aminocyclopropane-1-carboxylic acid (ACC) deaminase production or phosphate solubilization, which allows direct plant growth promotion. It includes an increase in biometrics traits, chemical element content (e.g., N, P, and K), and biologically active substances content or activity, e.g., antioxidant enzymes and total soluble sugar. Hence, B. cereus has supported the growth of plant species such as soybean, maize, rice, and wheat. Importantly, some B. cereus strains can also promote plant growth under abiotic stresses, including drought, salinity, and heavy metal pollution. In addition, B. cereus strains produced extracellular enzymes and antibiotic lipopeptides or triggered induced systemic resistance, which allows indirect stimulation of plant growth. As far as biocontrol is concerned, these PGPB can suppress the development of agriculturally important phytopathogens, including bacterial phytopathogens (e.g., Pseudomonas syringae, Pectobacterium carotovorum, and Ralstonia solanacearum), fungal phytopathogens (e.g., Fusarium oxysporum, Botrytis cinerea, and Rhizoctonia solani), and other phytopathogenic organisms (e.g., Meloidogyne incognita (Nematoda) and Plasmodiophora brassicae (Protozoa)). In conclusion, it should be noted that there are still few studies on the effectiveness of B. cereus under field conditions, particularly, there is a lack of comprehensive analyses comparing the PGP effects of B. cereus and mineral fertilizers, which should be reduced in favor of decreasing the use of mineral fertilizers. It is also worth mentioning that there are still very few studies on the impact of B. cereus on the indigenous microbiota and its persistence after application to soil. Further studies would help to understand the interactions between B. cereus and indigenous microbiota, subsequently contributing to increasing its effectiveness in promoting plant growth.
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Affiliation(s)
- Iryna Kulkova
- Institute of Technology and Life Sciences-National Research Institute, Falenty, 3 Hrabska Avenue, 05-090 Raszyn, Poland
| | - Jakub Dobrzyński
- Institute of Technology and Life Sciences-National Research Institute, Falenty, 3 Hrabska Avenue, 05-090 Raszyn, Poland
| | - Paweł Kowalczyk
- Department of Animal Nutrition, The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, Instytucka 3 Str., 05-110 Jabłonna, Poland
| | - Grzegorz Bełżecki
- Department of Animal Nutrition, The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, Instytucka 3 Str., 05-110 Jabłonna, Poland
| | - Karol Kramkowski
- Department of Physical Chemistry, Medical University of Białystok, Kilińskiego 1 Str., 15-089 Białystok, Poland
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Nana AS, Falkenberg T, Rechenburg A, Ntajal J, Kamau JW, Ayo A, Borgemeister C. Seasonal variation and risks of potentially toxic elements in agricultural lowlands of central Cameroon. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:4007-4023. [PMID: 36631578 DOI: 10.1007/s10653-022-01473-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 12/27/2022] [Indexed: 06/01/2023]
Abstract
Intensive urban agriculture is expanding in Cameroon, which increases the risks of environmental pollution, particularly in the lowlands. This study assessed the seasonal characteristics of some potentially toxic elements and their ecological risks during the dry and wet seasons in urban agricultural soils in four lowlands in Yaoundé. The area and seasonal variation of some potentially toxic elements (Cu, Pb, Zn, Cd, Cr, and Ni) were evaluated using mixed-effects modeling. The pollution status of these elements in the soil was evaluated and interpreted using parameters such as the single pollution (SPI) and Nemerow composite pollution (NCPI) indices. In addition, the effect of these metals in the environment was assessed using the potential ecological risk index (PERI). The distribution of all the studied elements showed an area effect, while a seasonal effect was only noticeable for Cu. The concentration of Cu, Pb, and Zn was higher than the recommended threshold values in one of the areas sampled, while Cr exceeded these threshold values in all areas during both seasons. Cr exhibited the highest SPI among all studied elements during the dry and wet seasons in all areas. Except for the NCPI in one area, where grade V (strong) soil pollution was recorded during the wet season, the soil from all the study areas exhibited a slight pollution level (grade III) with a mean NCPI between 1 and 2. The PERI value of all areas was below the reference values during both seasons, suggesting an overall low potential contamination risk of the soil biota. The results indicate that preventive action to limit the heavy metal contamination in the lowlands of Yaoundé needs to be taken, for instance, through the promotion of more sustainable use of agrochemicals like pesticides and mineral fertilizers.
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Affiliation(s)
- Annie Stephanie Nana
- Center for Development Research (ZEF), University of Bonn, 53113, Bonn, Germany.
- Laboratory of Biotechnology and Environment, Department of Plant Biology, Faculty of Science, University of Yaoundé I, 812, Yaoundé, Cameroon.
| | - Timo Falkenberg
- Center for Development Research (ZEF), University of Bonn, 53113, Bonn, Germany
- Institute of Hygiene and Public Health, Medical Faculty, University of Bonn, 53127, Bonn, Germany
| | - Andrea Rechenburg
- Institute of Hygiene and Public Health, Medical Faculty, University of Bonn, 53127, Bonn, Germany
| | - Joshua Ntajal
- Department of Geography, University of Bonn, 53115, Bonn, Germany
| | | | - Anne Ayo
- Laboratory of Biotechnology and Environment, Department of Plant Biology, Faculty of Science, University of Yaoundé I, 812, Yaoundé, Cameroon
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Harpke M, Kothe E. Biofilm formation in Gram-positives as an answer to combined salt and metal stress. J Basic Microbiol 2023. [PMID: 37189214 DOI: 10.1002/jobm.202300149] [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: 03/22/2023] [Revised: 04/17/2023] [Accepted: 04/24/2023] [Indexed: 05/17/2023]
Abstract
Biofilm formation can lead to tolerance against stressors like antibiotics, toxic metals, salts, and other environmental contaminants. Halo- and metal-tolerant bacilli and actinomycete strains isolated from a former uranium mining and milling site in Germany were shown to form biofilm in response to salt and metal treatment; specifically, Cs and Sr exposition led to biofilm formation. Since the strains were obtained from soil samples, a more structured environment was tested using expanded clay to provide porous structures resembling the natural environment. There, accumulation of Cs could be shown for Bacillus sp. SB53B, and high Sr accumulation ranging from 75% to 90% was seen with all isolates tested. We could, therefore, show that biofilms in a structured environment like soil will contribute to the water purification obtained by the passage of water through the critical zone of soil, providing an ecosystem benefit that can hardly be overestimated.
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Affiliation(s)
- Marie Harpke
- Institute of Microbiology, Friedrich Schiller University Jena, Jena, Germany
| | - Erika Kothe
- Institute of Microbiology, Friedrich Schiller University Jena, Jena, Germany
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Schommer VA, Vanin AP, Nazari MT, Ferrari V, Dettmer A, Colla LM, Piccin JS. Biochar-immobilized Bacillus spp. for heavy metals bioremediation: A review on immobilization techniques, bioremediation mechanisms and effects on soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 881:163385. [PMID: 37054796 DOI: 10.1016/j.scitotenv.2023.163385] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 04/15/2023]
Abstract
Heavy metals contamination present risks to ecosystems and human health. Bioremediation is a technology that has been applied to minimize the levels of heavy metals contamination. However, the efficiency of this process varies according to several biotic and abiotic aspects, especially in environments with high concentrations of heavy metals. Therefore, microorganisms immobilization in different materials, such as biochar, emerges as an alternative to alleviate the stress that heavy metals have on microorganisms and thus improve the bioremediation efficiency. In this context, this review aimed to compile recent advances in the use of biochar as a carrier of bacteria, specifically Bacillus spp., with subsequent application for the bioremediation of soil contaminated with heavy metals. We present three different techniques to immobilize Bacillus spp. on biochar. Bacillus strains are capable of reducing the toxicity and bioavailability of metals, while biochar is a material that serves as a shelter for microorganisms and also contributes to bioremediation through the adsorption of contaminants. Thus, there is a synergistic effect between Bacillus spp. and biochar for the heavy metals bioremediation. Biomineralization, biosorption, bioreduction, bioaccumulation and adsorption are the mechanisms involved in this process. The application of biochar-immobilized Bacillus strains results in beneficial effects on the contaminated soil, such as the reduction of toxicity and accumulation of metals in plants, favoring their growth, in addition to increasing microbial and enzymatic activity in soil. However, competition and reduction of microbial diversity and the toxic characteristics of biochar are reported as negative impacts of this strategy. More studies using this emerging technology are essential to improve its efficiency, to elucidate the mechanisms and to balance positive and negative impacts, especially at the field scale.
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Affiliation(s)
- Vera Analise Schommer
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Ana Paula Vanin
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Mateus Torres Nazari
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Valdecir Ferrari
- Graduate Program in Mining, Metallurgical and Materials Engineering (PPGE3M), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Aline Dettmer
- Graduate Program in Food Science and Technology (PPGCTA), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Luciane Maria Colla
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil.
| | - Jeferson Steffanello Piccin
- Graduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
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Kognou ALM, Chio C, Khatiwada JR, Shrestha S, Chen X, Zhu Y, Ngono Ngane RA, Agbor Agbor G, Jiang ZH, Xu CC, Qin W. Characterization of Potential Virulence, Resistance to Antibiotics and Heavy Metals, and Biofilm-Forming Capabilities of Soil Lignocellulolytic Bacteria. Microb Physiol 2023; 33:36-48. [PMID: 36944321 DOI: 10.1159/000530228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 03/12/2023] [Indexed: 03/23/2023]
Abstract
Soil bacteria participate in self-immobilization processes for survival, persistence, and production of virulence factors in some niches or hosts through their capacities for autoaggregation, cell surface hydrophobicity, biofilm formation, and antibiotic and heavy metal resistance. This study investigated potential virulence, antibiotic and heavy metal resistance, solvent adhesion, and biofilm-forming capabilities of six cellulolytic bacteria isolated from soil samples: Paenarthrobacter sp. MKAL1, Hymenobacter sp. MKAL2, Mycobacterium sp. MKAL3, Stenotrophomonas sp. MKAL4, Chryseobacterium sp. MKAL5, and Bacillus sp. MKAL6. Strains were subjected to phenotypic methods, including heavy metal and antibiotic susceptibility and virulence factors (protease, lipase, capsule production, autoaggregation, hydrophobicity, and biofilm formation). The effect of ciprofloxacin was also investigated on bacterial susceptibility over time, cell membrane, and biofilm formation. Strains MKAL2, MKAL5, and MKAL6 exhibited protease and lipase activities, while only MKAL6 produced capsules. All strains were capable of aggregating, forming biofilm, and adhering to solvents. Strains tolerated high amounts of chromium, lead, zinc, nickel, and manganese and were resistant to lincomycin. Ciprofloxacin exhibited bactericidal activity against these strains. Although the phenotypic evaluation of virulence factors of bacteria can indicate their pathogenic nature, an in-depth genetic study of virulence, antibiotic and heavy metal resistance genes is required.
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Affiliation(s)
| | - Chonlong Chio
- Department of Biology, Lakehead University, Thunder Bay, Ontario, Canada
| | | | - Sarita Shrestha
- Department of Biology, Lakehead University, Thunder Bay, Ontario, Canada
| | - Xuantong Chen
- Department of Biology, Lakehead University, Thunder Bay, Ontario, Canada
| | - Yuen Zhu
- School of Environment and Resources, Shanxi University, Taiyuan, China
| | | | - Gabriel Agbor Agbor
- Centre for Research on Medicinal Plants and Traditional Medicine, Institute of Medical Research and Medicinal Plants Studies Cameroon, Yaoundé, Cameroon
| | - Zi-Hua Jiang
- Department of Chemistry, Lakehead University, Thunder Bay, Ontario, Canada
| | - Chunbao Charles Xu
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario, Canada
| | - Wensheng Qin
- Department of Biology, Lakehead University, Thunder Bay, Ontario, Canada
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20
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Wróbel M, Śliwakowski W, Kowalczyk P, Kramkowski K, Dobrzyński J. Bioremediation of Heavy Metals by the Genus Bacillus. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:ijerph20064964. [PMID: 36981874 PMCID: PMC10049623 DOI: 10.3390/ijerph20064964] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/07/2023] [Accepted: 03/09/2023] [Indexed: 06/12/2023]
Abstract
Environmental contamination with heavy metals is one of the major problems caused by human activity. Bioremediation is an effective and eco-friendly approach that can reduce heavy metal contamination in the environment. Bioremediation agents include bacteria of the genus Bacillus, among others. The best-described species in terms of the bioremediation potential of Bacillus spp. Are B. subtilis, B. cereus, or B. thuringiensis. This bacterial genus has several bioremediation strategies, including biosorption, extracellular polymeric substance (EPS)-mediated biosorption, bioaccumulation, or bioprecipitation. Due to the above-mentioned strategies, Bacillus spp. strains can reduce the amounts of metals such as lead, cadmium, mercury, chromium, arsenic or nickel in the environment. Moreover, strains of the genus Bacillus can also assist phytoremediation by stimulating plant growth and bioaccumulation of heavy metals in the soil. Therefore, Bacillus spp. is one of the best sustainable solutions for reducing heavy metals from various environments, especially soil.
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Affiliation(s)
- Monika Wróbel
- Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland
| | - Wojciech Śliwakowski
- Institute of Technology and Life Sciences—National Research Institute, Falenty, 3 Hrabska Avenue, 05-090 Raszyn, Poland
| | - Paweł Kowalczyk
- Department of Animal Nutrition, The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, Instytucka 3, 05-110 Jabłonna, Poland
| | - Karol Kramkowski
- Department of Physical Chemistry, Medical University of Białystok, Kilińskiego 1 Str., 15-089 Białystok, Poland
| | - Jakub Dobrzyński
- Institute of Technology and Life Sciences—National Research Institute, Falenty, 3 Hrabska Avenue, 05-090 Raszyn, Poland
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21
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Sharma P, Bano A, Yadav S, Singh SP. Biocatalytic Degradation of Emerging Micropollutants. Top Catal 2023. [DOI: 10.1007/s11244-023-01790-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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22
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Dan Y, Wang X, Ji M, Sang W, Shen Z, Zhang Y. Influence of temperature change on the immobilization of soil Pb and Zn by hydrochar: Roles of soil microbial modulation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 320:121109. [PMID: 36669718 DOI: 10.1016/j.envpol.2023.121109] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 01/13/2023] [Accepted: 01/17/2023] [Indexed: 06/17/2023]
Abstract
Considering the potential effect of the ambient temperature on soil microorganisms during heavy metal immobilization by hydrochar, 60 days of soil incubation was conducted to explore the impact of ambient temperature (5, 25, and 35 °C) on the immobilization of Pb and Zn by chitosan-magnetic sawdust hydrochar (CMSH) and magnetic chitosan hydrochar (MCH). The results showed that soil pH was relatively high and total organic carbon (TOC) was slightly lower in the 35 °C treatment. The diethylenetriaminepentaacetic acid (DTPA) available state content decreased significantly with the temperature increasing. Meanwhile, the ratios of stable Pb and Zn in the sequential extraction method proposed by the European Community Bureau of Reference (BCR) gradually increased with increasing temperature. The heatmap based on microbial community showed that elevated temperature not only favored the enrichment of metal-stable phyla, such as Chloroflexi, but was also involved in inhibiting the growth of Firmicutes, Actinobacteriota, and Proteobacteria. Meanwhile, different genera (Fonticella and Bacillus) in the Firmicutes phylum had distinct responses to temperature as well as to heavy metal immobilization effects. Subsequently, redundancy analysis confirmed that Chloroflexi and Fonticella were positively correlated with temperature and stable state metal content, while Actinobacteriota and Bacillus were negatively correlated with temperature and were positively correlated with DTPA available metal content. Moreover, Pb and Zn indicators displayed significant correlations for the dominant genera (R2 > 0.8, p < 0.02).
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Affiliation(s)
- Yitong Dan
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Xiaoxia Wang
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Mengyuan Ji
- Department of Biology, University of Padua, 35131, Padova, Italy
| | - Wenjing Sang
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China.
| | - Zheng Shen
- Institute of New Rural Development, Tongji University, Shanghai, 200092, China
| | - Yalei Zhang
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
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23
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Biotechnology Advances in Bioremediation of Arsenic: A Review. Molecules 2023; 28:molecules28031474. [PMID: 36771138 PMCID: PMC9921067 DOI: 10.3390/molecules28031474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/16/2023] [Accepted: 01/31/2023] [Indexed: 02/05/2023] Open
Abstract
Arsenic is a highly toxic metalloid widespread in the Earth's crust, and its contamination due to different anthropogenic activities (application of agrochemicals, mining, waste management) represents an emerging environmental issue. Therefore, different sustainable and effective remediation methods and approaches are needed to prevent and protect humans and other organisms from detrimental arsenic exposure. Among numerous arsenic remediation methods, those supported by using microbes as sorbents (microbial remediation), and/or plants as green factories (phytoremediation) are considered as cost-effective and environmentally-friendly bioremediation. In addition, recent advances in genetic modifications and biotechnology have been used to develop (i) more efficient transgenic microbes and plants that can (hyper)accumulate or detoxify arsenic, and (ii) novel organo-mineral materials for more efficient arsenic remediation. In this review, the most recent insights from arsenic bio-/phytoremediation are presented, and the most relevant physiological and molecular mechanisms involved in arsenic biological routes, which can be useful starting points in the creation of more arsenic-tolerant microbes and plants, as well as their symbiotic associations are discussed.
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24
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Conte C, Apostolaki ET, Vizzini S, Migliore L. A Tight Interaction between the Native Seagrass Cymodocea nodosa and the Exotic Halophila stipulacea in the Aegean Sea Highlights Seagrass Holobiont Variations. PLANTS (BASEL, SWITZERLAND) 2023; 12:350. [PMID: 36679063 PMCID: PMC9863530 DOI: 10.3390/plants12020350] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 01/03/2023] [Accepted: 01/05/2023] [Indexed: 06/17/2023]
Abstract
Seagrasses harbour bacterial communities with which they constitute a functional unit called holobiont that responds as a whole to environmental changes. Epiphytic bacterial communities rapidly respond to both biotic and abiotic factors, potentially contributing to the host fitness. The Lessepsian migrant Halophila stipulacea has a high phenotypical plasticity and harbours a highly diverse epiphytic bacterial community, which could support its invasiveness in the Mediterranean Sea. The current study aimed to evaluate the Halophila/Cymodocea competition in the Aegean Sea by analysing each of the two seagrasses in a meadow zone where these intermingled, as well as in their monospecific zones, at two depths. Differences in holobionts were evaluated using seagrass descriptors (morphometric, biochemical, elemental, and isotopic composition) to assess host changes, and 16S rRNA gene to identify bacterial community structure and composition. An Indicator Species Index was used to identify bacteria significantly associated with each host. In mixed meadows, native C. nodosa was shown to be affected by the presence of exotic H. stipulacea, in terms of both plant descriptors and bacterial communities, while H. stipulacea responded only to environmental factors rather than C. nodosa proximity. This study provided evidence of the competitive advantage of H. stipulacea on C. nodosa in the Aegean Sea and suggests the possible use of associated bacterial communities as an ecological seagrass descriptor.
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Affiliation(s)
- Chiara Conte
- PhD Program in Evolutionary Biology and Ecology, University of Rome Tor Vergata, 00133 Rome, Italy
- Laboratory of Ecology and Ecotoxicology, Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Eugenia T. Apostolaki
- Institute of Oceanography, Hellenic Centre for Marine Research, P.O. Box 2214, 71003 Heraklion, Crete, Greece
| | - Salvatrice Vizzini
- Department of Earth and Marine Sciences, University of Palermo, Via Archirafi 18, 90123 Palermo, Italy
- CoNISMa, National Interuniversity Consortium for Marine Sciences, Piazzale Flaminio 9, 00196 Roma, Italy
| | - Luciana Migliore
- Laboratory of Ecology and Ecotoxicology, Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
- eCampus University, Via Isimbardi 10, 22060 Novedrate (CO), Italy
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25
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Feng H, Meng P, Zhang S, Chen W, Wang H, Wang C. Insights from comparative transcriptome analysis in the responses of Pb-tolerant fungi Curvularia tsudae to Pb stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 249:114476. [PMID: 38321691 DOI: 10.1016/j.ecoenv.2022.114476] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 12/06/2022] [Accepted: 12/23/2022] [Indexed: 02/08/2024]
Abstract
The fungus Curvularia tsudae can survive in environments that are extremely contaminated by heavy metals; however, the underlying molecular mechanisms of heavy metal tolerance are not clear. In this study, we determined the effects of lead (Pb) stress on the growth of C. tsudae and used RNA-Seq to identify significant genes and biological processes involved. The present study showed that C. tsudae had an outstanding resistant capacity to Pb stress and could survive at a concentration of 1600 mg L-1 Pb. Although an obvious inhibition on the growth was observed, the fungus exhibited tolerance as it continued to grow at a Pb concentration of 1600 mg L-1 for seven days. A total of 9997 (9020 up and 977 down) differentially expressed genes (DEGs) were detected in the mycelium of C. tsudae at Pb free (0 mg L-1) and Pb stressed samples. Pathway enrichment analysis identified several biological processes for managing Pb stress. Genes involved in carbohydrate metabolism tended to be modulated in response to Pb stress, while amino acids and the lipid metabolism would also be induced by Pb stress, and up-regulated genes involved in antioxidant substances and ABC transporters may be committed to high Pb tolerance. Our study contributes to the current literature on C. tsudae response to Pb stress and provides a useful reference for fungi as bioremediators in heavy metal-contaminated environments.
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Affiliation(s)
- Huan Feng
- College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Panpan Meng
- College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Shouxia Zhang
- College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Wei Chen
- College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Haihua Wang
- North Florida Research and Education Center, University of Florida, 155 Research Road, Quincy, FL 32351, USA
| | - Chunyan Wang
- College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China.
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26
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Wang LL, Liu YM, Liu HM, Shi QS, Peng RQ, Xie XB. The role of structural evolution in the complexation and flocculation of heavy metals by the microbial product poly-γ-glutamic acid. CHEMOSPHERE 2022; 308:136441. [PMID: 36116632 DOI: 10.1016/j.chemosphere.2022.136441] [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: 03/21/2022] [Revised: 07/20/2022] [Accepted: 09/10/2022] [Indexed: 06/15/2023]
Abstract
The process and mechanism of heavy metal flocculation with extracellular polymeric substances (EPS) secreted by microorganisms, are crucial to their fate in natural environment, wastewater treatment and soil bioremediation applications. However, the structural features of EPS and the relationship between these features and the flocculation process and mechanism remain unclear. In the present study, structural features of the microbial product poly-γ-glutamic acid (γ-PGA) complexed with the heavy metal ions Pb2+ and Cu2+ were characterized and the evolution of these features was identified as having a key role in the flocculation process and mechanism. The secondary structure of the γ-PGA-Pb complex changed significantly, while that of the γ-PGA-Cu complex was only slightly altered. The significant structural change in γ-PGA-Pb was found to be responsible for the combination of residual COOH and Pb2+, promoting the bridging of inter-colloids and faster growth of hydrodynamic diameter. If the conformation changed sufficiently, such as with the γ-PGA-Pb complex in the pH range 4.6-6.2, pH had no impact on the conversion ratio. The unchanged structure of γ-PGA-Cu prevented the flocculation process, although the coordination mode of γ-PGA-Cu resulted in a higher biosorption capacity. This in-depth molecular-level study provides insight into the γ-PGA flocculation mechanism, promoting the use of γ-PGA and γ-PGA producing microorganisms for application in various remediation strategies.
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Affiliation(s)
- Ling-Ling Wang
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Ya-Min Liu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Hui-Ming Liu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Qing-Shan Shi
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China.
| | - Ru-Qun Peng
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China
| | - Xiao-Bao Xie
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, China.
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27
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Tufail MA, Iltaf J, Zaheer T, Tariq L, Amir MB, Fatima R, Asbat A, Kabeer T, Fahad M, Naeem H, Shoukat U, Noor H, Awais M, Umar W, Ayyub M. Recent advances in bioremediation of heavy metals and persistent organic pollutants: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 850:157961. [PMID: 35963399 DOI: 10.1016/j.scitotenv.2022.157961] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 08/02/2022] [Accepted: 08/06/2022] [Indexed: 06/15/2023]
Abstract
Heavy metals and persistent organic pollutants are causing detrimental effects on the environment. The seepage of heavy metals through untreated industrial waste destroys the crops and lands. Moreover, incineration and combustion of several products are responsible for primary and secondary emissions of pollutants. This review has gathered the remediation strategies, current bioremediation technologies, and their primary use in both in situ and ex situ methods, followed by a detailed explanation for bioremediation over other techniques. However, an amalgam of bioremediation techniques and nanotechnology could be a breakthrough in cleaning the environment by degrading heavy metals and persistant organic pollutants.
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Affiliation(s)
| | - Jawaria Iltaf
- Institute of Chemistry, University of Sargodha, 40100, Pakistan
| | - Tahreem Zaheer
- Department of Biological Physics, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary
| | - Leeza Tariq
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore 53700, Pakistan
| | - Muhammad Bilal Amir
- Key Laboratory of Insect Ecology and Molecular Biology, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Rida Fatima
- School of Science, Department of Chemistry, University of Management and Technology, Lahore, Pakistan
| | - Ayesha Asbat
- Department of Pharmacy, The University of Lahore, Lahore, Pakistan
| | - Tahira Kabeer
- Center of Agriculture Biochemistry and Biotechnology CABB, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Fahad
- Department of Plant Breeding and Genetics, Bahauddin Zakariya University, Multan, Pakistan
| | - Hamna Naeem
- Department of Environmental Sciences, Fatima Jinnah Women University, The Mall, 46000 Rawalpindi, Pakistan
| | - Usama Shoukat
- Integrated Genomics Cellular Development Biology Lab, Department of Entomology, University of Agriculture, Faisalabad, Pakistan
| | - Hazrat Noor
- Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Muhammad Awais
- International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Wajid Umar
- Institute of Environmental Science, Hungarian University of Agriculture and Life Sciences, Gödöllő 2100, Hungary
| | - Muhaimen Ayyub
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Pakistan
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28
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Sreehari K, Namratha W, Joseph N, Balachandran M. Toxic heavy metal ion detection by fluorescent nanocarbon sensor derived from a medicinal plant. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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29
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Batool M, Rahman SU, Ali M, Nadeem F, Ashraf MN, Harris M, Du Z, Khan WUD. Microbial-assisted soil chromium immobilization through zinc and iron-enriched rice husk biochar. Front Microbiol 2022; 13:990329. [PMID: 36171745 PMCID: PMC9511223 DOI: 10.3389/fmicb.2022.990329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 08/15/2022] [Indexed: 11/13/2022] Open
Abstract
Soil chromium toxicity usually caused by the tannery effluent compromises the environment and causes serious health hazards. The microbial role in strengthening biochar for its soil chromium immobilization remains largely unknown. Hence, this study evaluated the effectiveness of zinc and iron-enriched rice husk biochar (ZnBC and FeBC) with microbial combinations to facilitate the chromium immobilization in sandy loam soil. We performed morphological and molecular characterization of fungal [Trichoderma harzianum (F1), Trichoderma viride (F2)] and bacterial [Pseudomonas fluorescence (B1), Bacillus subtilis (B2)] species before their application as soil ameliorants. There were twenty-five treatments having ZnBC and FeBC @ 1.5 and 3% inoculated with bacterial and fungal isolates parallel to wastewater in triplicates. The soil analyses were conducted in three intervals each after 20, 30, and 40 days. The combination of FeBC 3%+F2 reduced the soil DTPA-extractable chromium by 96.8% after 40 days of incubation (DAI) relative to wastewater. Similarly, 92.81% reduction in chromium concentration was achieved through ZnBC 3%+B1 after 40 DAI compared to wastewater. Under the respective treatments, soil Cr(VI) retention trend increased with time such as 40 > 30 > 20 DAI. Langmuir adsorption isotherm verified the highest chromium adsorption capacity (41.6 mg g−1) with FeBC 3% at 40 DAI. Likewise, principal component analysis (PCA) and heat map disclosed electrical conductivity-chromium positive, while cation exchange capacity-chromium and pH-organic matter negative correlations. PCA suggested the ZnBC-bacterial while FeBC-fungal combinations as effective Cr(VI) immobilizers with >70% data variance at 40 DAI. Overall, the study showed that microbes + ZnBC/FeBC resulted in low pH, high OM, and CEC, which ultimately played a role in maximum Cr(VI) adsorption from wastewater applied to the soil. The study also revealed the interrelation and alternations in soil dynamics with pollution control treatments. Based on primitive soil characteristics such as soil metal concentration, its acidity, and alkalinity, the selection criteria can be set for treatments application to regulate the soil properties. Additionally, FeBC with Trichoderma viride should be tested on the field scale to remediate the Cr(VI) toxicity.
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Affiliation(s)
- Masooma Batool
- Sustainable Development Study Centre, Government College University, Lahore, Pakistan
| | - Shafeeq ur Rahman
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, China
- MOE Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing, China
| | - Muhammad Ali
- Sustainable Development Study Centre, Government College University, Lahore, Pakistan
| | - Faisal Nadeem
- Department of Soil Science, University of the Punjab, Lahore, Pakistan
| | - Muhammad Nadeem Ashraf
- Institute of Soil & Environmental Sciences, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Harris
- Department of Environmental Sciences, University of Lahore, Lahore, Pakistan
| | - Zhenjie Du
- Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang, China
- Water Environment Factor Risk Assessment Laboratory of Agricultural Products Quality and Safety, Ministry of Agriculture and Rural Affairs, Xinxiang, China
- *Correspondence: Waqas-ud-Din Khan
| | - Waqas-ud-Din Khan
- Sustainable Development Study Centre, Government College University, Lahore, Pakistan
- Zhenjie Du
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Li N, Li H, Zhu C, Liu C, Su G, Chen J. Controlling AMR in the Pig Industry: Is It Enough to Restrict Heavy Metals? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:11265. [PMID: 36141538 PMCID: PMC9517514 DOI: 10.3390/ijerph191811265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/02/2022] [Accepted: 09/06/2022] [Indexed: 06/16/2023]
Abstract
Heavy metals have the potential to influence the transmission of antimicrobial resistance (AMR). However, the effect on AMR caused by heavy metals has not been clearly revealed. In this study, we used a microcosm experiment and metagenomics to examine whether common levels of Cu and Zn in pig manure influence AMR transmission in manured soil. We found that the abundance of 204 ARGs significantly increased after manure application, even though the manure did not contain antibiotic residuals. However, the combined addition of low Cu and Zn (500 and 1000 mg/kg, respectively) only caused 14 ARGs to significantly increase, and high Cu and Zn (1000 and 3000 mg/kg, respectively) caused 27 ARGs to significantly increase. The disparity of these numbers suggested that factors within the manure were the primary driving reasons for AMR transmission, rather than metal amendments. A similar trend was found for biocide and metal resistance genes (BMRGs) and mobile genetic elements (MGEs). This study offers deeper insights into AMR transmission in relation to the effects of manure application and heavy metals at commonly reported levels. Our findings recommend that more comprehensive measures in controlling AMR in the pig industry are needed apart from restricting heavy metal additions.
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Affiliation(s)
- Na Li
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
- Institute for Public Safety Research, Tsinghua University, Beijing 100084, China
| | - Hongna Li
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Changxiong Zhu
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Chong Liu
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Guofeng Su
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
- Institute for Public Safety Research, Tsinghua University, Beijing 100084, China
| | - Jianguo Chen
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
- Institute for Public Safety Research, Tsinghua University, Beijing 100084, China
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Sharma R, Jasrotia T, Umar A, Sharma M, Sharma S, Kumar R, Alkhanjaf AAM, Vats R, Beniwal V, Kumar R, Singh J. Effective removal of Pb(II) and Ni(II) ions by Bacillus cereus and Bacillus pumilus: An experimental and mechanistic approach. ENVIRONMENTAL RESEARCH 2022; 212:113337. [PMID: 35469857 DOI: 10.1016/j.envres.2022.113337] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 04/03/2022] [Accepted: 04/15/2022] [Indexed: 06/14/2023]
Abstract
Herein, we report a bacteria-based strategy as an efficient, reasonable, benign, and promising methodology for remediating heavy metals fed waterbodies. The contemporary study deals with isolating, screening, and characterizing heavy metal resistive bacteria from metal-rich sites. The transcriptome analysis reveals the identity of the isolated species as Bacillus pumilus and Bacillus cereus. Batch studies put forth the bioremoval results in designed conditions of different pH, concentration, dose, and time. The mechanistic actions are drawn using complementary techniques such as Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The theory of surface adsorption of lead (Pb(II)) and nickel (Ni(II)) is further fostered by the application of adsorption isotherms. The conducted studies establish the bacterial morphological stratagems and multifarious biochemical approaches for countering metallic ions of Pb(II) and Ni(II). The exhibition of significant removal results by the isolated bacterial strains in simulated water samples with remarkable proliferation rates has opened up its favorability for industrial platforms.
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Affiliation(s)
- Rohit Sharma
- Department of Biotechnology, Maharishi Markandeshwar Deemed to Be University, Mullana (Ambala), 133207, Haryana, India
| | - Teenu Jasrotia
- Department of Environment Studies, Panjab University, Chandigarh, 160014, India; Department of Chemistry and Centre of Advanced Studies, Panjab University, Chandigarh, 160014, India
| | - Ahmad Umar
- Department of Chemistry, Faculty of Science and Arts, Najran University, Najran, 11001, Saudi Arabia; Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran, 11001, Saudi Arabia.
| | - Monu Sharma
- Department of Biotechnology, Maharishi Markandeshwar Deemed to Be University, Mullana (Ambala), 133207, Haryana, India
| | - Sonu Sharma
- Department of Biotechnology, Maharishi Markandeshwar Deemed to Be University, Mullana (Ambala), 133207, Haryana, India
| | - Rajeev Kumar
- Department of Environment Studies, Panjab University, Chandigarh, 160014, India
| | - Abdulrab Ahmed M Alkhanjaf
- Molecular Diagnostics, Clinical Laboratory Sciences Department, College of Applied Medical Sciences, Najran University, Najran, 11001, Saudi Arabia
| | - Rajeev Vats
- Scientist E and Head, Northern Regional Laboratory, Bureau of Indian Standards, Mohali, Punjab, India
| | - Vikas Beniwal
- Department of Microbiology, School of Interdisciplinary and Applied Sciences, Central University of Haryana, Mahendergarh, 123031, India
| | - Raman Kumar
- Department of Biotechnology, Maharishi Markandeshwar Deemed to Be University, Mullana (Ambala), 133207, Haryana, India.
| | - Joginder Singh
- Department of Chemistry¸ Maharishi Markandeshwar (Deemed to Be University), Mullana (Ambala), 133207, Haryana, India
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Prakash AA, Sathishkumar K, AlSalhi MS, Devanesan S, Mani P, Kamala-Kannan S, Vijayanand S, Rajasekar A. Integrated approach of photo-assisted electrochemical oxidation and sequential biodegradation of textile effluent. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 307:119412. [PMID: 35568287 DOI: 10.1016/j.envpol.2022.119412] [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: 02/01/2022] [Revised: 04/12/2022] [Accepted: 05/01/2022] [Indexed: 06/15/2023]
Abstract
Synthetic azo dyes are extensively used in the textile industries, which are being released as textile effluent into the environment presence of azo dyes in the environment is great environmental concern therefore treatment of textile effluent is crucial for proper release of the effluent into the environment. Electrochemical oxidation (EO) is extensively used in the degradation of pollutants because of its high efficiency. In this study, photo-assisted electrooxidation (PEO) followed by biodegradation of the textile effluent was evaluated. The pretreatment of textile effluent was conducted by EO and PEO in a tubular flow cell with TiO2-Ti/IrO2-RuO2 anode and titanium cathode under different current densities (10, 15, and 20 mA cm-2). The chemical oxygen demand level reduced from 3150 mg L-1 to 1300 and 600 mg L-1under EO and PEO, respectively. Furthermore, biodegradation of EO and PEO pretreated textile effluent shows reduction in chemical oxygen demand (COD) from 1300 mg L-1 to 900 mg L-1and 600 mg L-1to 110 mg L-1, respectively. The most abundant genera were identified as Acetobacter, Achromobacter, Acidaminococcus, Actinomyces, and Acetomicrobium from the textile effluent. This study suggests that an integrated approach of PEO and subsequent biodegradation might be an effective and eco-friendly method for the degradation of textile effluent.
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Affiliation(s)
- Arumugam Arul Prakash
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore, Tamil Nadu, 632115, India
| | - Kuppusamy Sathishkumar
- Rhizosphere Biology Laboratory, Department of Microbiology, Bharathidasan University, Tiruchirappalli, 620 024, Tamil Nadu, India
| | - Mohamad S AlSalhi
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box: 2455, Riyadh, 11451, Saudi Arabia
| | - Sandhanasamy Devanesan
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box: 2455, Riyadh, 11451, Saudi Arabia
| | - Panagal Mani
- Department of Biotechnology, Annai College of Arts and Science, Kumbakonam, Thanjavur District, Affiliated to Bharathidasan University, Tiruchirappalli, Tamil Nadu, 612503, India
| | - Seralathan Kamala-Kannan
- Division of Biotechnology Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Science, Jeonbuk National University, Iksan, 54596, South Korea
| | - Selvaraj Vijayanand
- Bioresource Technology Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore, Tamil Nadu, 632115, India
| | - Aruliah Rajasekar
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore, Tamil Nadu, 632115, India.
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Mafulul SG, Potgieter JH, Longdet IY, Okoye ZSC, Potgieter-Vermaak SS. Health Risks for a Rural Community in Bokkos, Plateau State, Nigeria, Exposed to Potentially Toxic Elements from an Abandoned Tin Mine. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 83:47-66. [PMID: 35678870 DOI: 10.1007/s00244-022-00936-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
The past mining activities in Bokkos Local Government Area (LGA) were performed in an uncontrolled way and gave rise to many abandoned ponds now serving as domestic and irrigation water sources. Past research focused mainly on the environmental impact, and we show for the first time what the human health risk through consumption of contaminated food crops is in these communities. This study was designed to determine the level of Potentially Toxic Elements (PTEs) contamination in pond water, soil, and food crops and assess the health risk of inhabitants in the abandoned tin mining community in Bokkos LGA. Samples of the mining pond water, soil, and selected food crops from farms irrigated with the pond water: bitter leaf (Vernonia amygdalina), pepper (Piper nigrum), okra (Albelmoschus esculentus), maize (Zea mays), sweet potato (Ipomoea batatas), and Irish potato (Solanum tuberosum) were analyzed for each of the eight PTEs (viz. Cu, Cr, Fe, Mn, Ni, Zn, Cd, and Pb) using inductively coupled plasma optical emission spectrometry (ICP-OES). The results obtained showed that the levels of all the PTEs analyzed in the soil, pond water, and selected food crops except for Fe and Mn in soil and Cd in sweet potato were greater than their corresponding background area values (p < 0.05). Also, the mean concentrations of all the PTEs except for Cu in pond water were significantly (p < 0.05) higher than the WHO maximum permissible limit. With the exception of Fe, Ni, and Zn for pepper and okra, Cu and Fe for maize grains as well as Cu, Ni, and Zn for sweet and Irish potatoes and Fe and Cd for sweet potato, the mean concentrations of PTEs in the food crops were significantly higher than WHO maximum permissible limit. The EF values of Cd (0.39); Cu (3.59) and Ni (2.81); Cr (9.38) and Pb (17.84); and Mn (178.13) and Zn (83.22) classified the soil as minimally, moderately, significantly, and extremely highly enriched, respectively. The PI values of all the PTEs in the soil studied were all greater than 5, indicating that the soils were severely contaminated. There was evidence that food crops significantly bioaccumulated PTEs either as a result of contaminated soil and/or irrigation water. The bioaccumulation was not uniform and was dominated by transfer from the polluted irrigation water. The bitter leaf, okra, and to some extent maize had the highest transfer of PTEs, and Mn, Cu, and Zn had the highest bioaccumulation in the food crops investigated. The hazardous index (HI) for the eight PTEs through the consumption of food crops was 107 for children and 33 for adults which greatly exceeded the recommended limit of 1, thus indicating that possible health risks exist for both local children and adults. For every PTE, the values of HI for children are many-fold higher than those for adults, which is of particular concern due to the high HI values for Pb found for maize consumption, a typical staple food. The cancer risk values for Cr and Ni for all the food crops were within 10-3-10-1 which is several fold higher than the permissible limits (10-6 and < 10-4) indicating the high carcinogenic risk. It can be concluded based on the results and risk assessment provided by this study that human exposure to mining pond water and soil in farms around the mining pond through the food chain suggests the high vulnerability of the local community to PTE toxicity. Long-term preventive measures to safeguard the health of the residents need to be put in place.
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Affiliation(s)
- Simon Gabriel Mafulul
- Department of Biochemistry, Faculty of Medical Sciences, University of Jos, Plateau State, P.M.B. 2084, Jos, Nigeria.
| | - Johannes H Potgieter
- Ecology & Environment Research Centre, Department of Natural Science, Faculty of Science and Engineering, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, UK
- School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Private Bag X3, PO Wits, Johannesburg, 2050, South Africa
| | - Ishaya Yohanna Longdet
- Department of Biochemistry, Faculty of Medical Sciences, University of Jos, Plateau State, P.M.B. 2084, Jos, Nigeria
| | - Zebulon S C Okoye
- Department of Biochemistry, Faculty of Medical Sciences, University of Jos, Plateau State, P.M.B. 2084, Jos, Nigeria
| | - Sanja S Potgieter-Vermaak
- Ecology & Environment Research Centre, Department of Natural Science, Faculty of Science and Engineering, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, UK
- Molecular Science Institute, School of Chemistry, University of the Witwatersrand, Private Bag X3, PO Wits, Johannesburg, 2050, South Africa
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Elsayed A, Moussa Z, Alrdahe SS, Alharbi MM, Ghoniem AA, El-khateeb AY, Saber WIA. Optimization of Heavy Metals Biosorption via Artificial Neural Network: A Case Study of Cobalt (II) Sorption by Pseudomonas alcaliphila NEWG-2. Front Microbiol 2022; 13:893603. [PMID: 35711743 PMCID: PMC9194897 DOI: 10.3389/fmicb.2022.893603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 05/02/2022] [Indexed: 02/03/2023] Open
Abstract
The definitive screening design (DSD) and artificial neural network (ANN) were conducted for modeling the biosorption of Co(II) by Pseudomonas alcaliphila NEWG-2. Factors such as peptone, incubation time, pH, glycerol, glucose, K2HPO4, and initial cobalt had a significant effect on the biosorption process. MgSO4 was the only insignificant factor. The DSD model was invalid and could not forecast the prediction of Co(II) removal, owing to the significant lack-of-fit (P < 0.0001). Decisively, the prediction ability of ANN was accurate with a prominent response for training (R2 = 0.9779) and validation (R2 = 0.9773) and lower errors. Applying the optimal levels of the tested variables obtained by the ANN model led to 96.32 ± 2.1% of cobalt bioremoval. During the biosorption process, Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray spectroscopy, and scanning electron microscopy confirmed the sorption of Co(II) ions by P. alcaliphila. FTIR indicated the appearance of a new stretching vibration band formed with Co(II) ions at wavenumbers of 562, 530, and 531 cm-1. The symmetric amino (NH2) binding was also formed due to Co(II) sorption. Interestingly, throughout the revision of publications so far, no attempt has been conducted to optimize the biosorption of Co(II) by P. alcaliphila via DSD or ANN paradigm.
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Affiliation(s)
- Ashraf Elsayed
- Botany Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Zeiad Moussa
- Department of Microbiology, Soils, Water and Environment Research Institute, Agricultural Research Center, Giza, Egypt
| | - Salma Saleh Alrdahe
- Department of Biology, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia
| | | | - Abeer A. Ghoniem
- Department of Microbiology, Soils, Water and Environment Research Institute, Agricultural Research Center, Giza, Egypt
| | - Ayman Y. El-khateeb
- Department of Agricultural Chemistry, Faculty of Agriculture, Mansoura University, Mansoura, Egypt
| | - WesamEldin I. A. Saber
- Department of Microbiology, Soils, Water and Environment Research Institute, Agricultural Research Center, Giza, Egypt
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Khan M, Kamran M, Kadi RH, Hassan MM, Elhakem A, Sakit ALHaithloul HA, Soliman MH, Mumtaz MZ, Ashraf M, Shamim S. Harnessing the Potential of Bacillus altitudinis MT422188 for Copper Bioremediation. Front Microbiol 2022; 13:878000. [PMID: 35663894 PMCID: PMC9161743 DOI: 10.3389/fmicb.2022.878000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 04/05/2022] [Indexed: 12/08/2022] Open
Abstract
The contamination of heavy metals is a cause of environmental concern across the globe, as their increasing levels can pose a significant risk to our natural ecosystems and public health. The present study was aimed to evaluate the ability of a copper (Cu)-resistant bacterium, characterized as Bacillus altitudinis MT422188, to remove Cu from contaminated industrial wastewater. Optimum growth was observed at 37°C, pH 7, and 1 mm phosphate, respectively. Effective concentration 50 (EC50), minimum inhibitory concentration (MIC), and cross-heavy metal resistance pattern were observed at 5.56 mm, 20 mm, and Ni > Zn > Cr > Pb > Ag > Hg, respectively. Biosorption of Cu by live and dead bacterial cells in its presence and inhibitors 1 and 2 (DNP and DCCD) was suggestive of an ATP-independent efflux system. B. altitudinis MT422188 was also able to remove 73 mg/l and 82 mg/l of Cu at 4th and 8th day intervals from wastewater, respectively. The presence of Cu resulted in increased GR (0.004 ± 0.002 Ug−1FW), SOD (0.160 ± 0.005 Ug−1FW), and POX (0.061 ± 0.004 Ug−1FW) activity. Positive motility (swimming, swarming, twitching) and chemotactic behavior demonstrated Cu as a chemoattractant for the cells. Metallothionein (MT) expression in the presence of Cu was also observed by SDS-PAGE. Adsorption isotherm and pseudo-kinetic-order studies suggested Cu biosorption to follow Freundlich isotherm as well as second-order kinetic model, respectively. Thermodynamic parameters such as Gibbs free energy (∆G°), change in enthalpy (∆H° = 10.431 kJ/mol), and entropy (∆S° = 0.0006 kJ/mol/K) depicted the biosorption process to a feasible, endothermic reaction. Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and Energy-Dispersive X-Ray Spectroscopy (EDX) analyses revealed the physiochemical and morphological changes in the bacterial cell after biosorption, indicating interaction of Cu ions with its functional groups. Therefore, these features suggest the potentially effective role of B. altitudinis MT422188 in Cu bioremediation.
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Affiliation(s)
- Maryam Khan
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Muhammad Kamran
- School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA, Australia
| | - Roqayah H. Kadi
- Department of Biology, College of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Mohamed M. Hassan
- Department of Biology, College of Science, Taif University, Taif, Saudi Arabia
- *Correspondence: Mohamed M. Hassan,
| | - Abeer Elhakem
- Department of Biology, College of Sciences and Humanities, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | | | - Mona H. Soliman
- Botany and Microbiology Department, Faculty of Science, Cairo University, Giza, Egypt
- Biology Department, Faculty of Science, Taibah University, Al-Sharm, Yanbu El-Bahr, Saudi Arabia
| | - Muhammad Zahid Mumtaz
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Muhammad Ashraf
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Saba Shamim
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
- Saba Shamim,
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Hu Frisk J, Pejler G, Eriksson S, Wang L. Heavy metal tolerance of Mesorhizobium delmotii thymidylate kinase. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2022; 41:1305-1317. [PMID: 35345982 DOI: 10.1080/15257770.2022.2055059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Metal ions play an important role in many metabolic processes in all living organisms. At low concentrations, heavy metals such as Fe2+, Cu2+ and Zn2+ are essential cofactors for many enzymes. However, at high concentrations they are toxic. Mesorhizobium species belong to the class α-proteobacteria and have high tolerance to soil acidity, salinity, temperature extremes, and metallicolous conditions. To identify factors responsible for this tolerance we have studied the effects of metal ions on Mesorhizobium delmotii thymidylate kinase (MdTMPK), an essential enzyme in the synthesis of dTTP, thus being vital for cell growth. We show that Mg2+ and Mn2+ are the divalent metal ions required for catalysis and that Mn2+ gives the highest catalytic efficiency. MdTMPK activity in the presence of Mg2+ was strongly inhibited by the co-presence of Zn2+, Ni2+ and Co2+. However, the addition of Cs+ caused >2-fold enhanced MdTMPK activity. For TMPK from Bacilus anthracis and humans, the effects of Mg2+ and Mn2+ were similar, whereas the effects of other divalent metal ions were different, and no stimulatory effect of Cs+ was observed. Together, our results demonstrate that MdTMPK and BaTMPK function well in the presence of high concentrations of heavy metal ions, introducing a potential contribution of these enzymes to the heavy metal tolerance of Mesorhizobium delmotii and Bacillus anthracis.
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Affiliation(s)
- Junmei Hu Frisk
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Gunnar Pejler
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden.,Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Staffan Eriksson
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Liya Wang
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
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Bacterial Biosorbents, an Efficient Heavy Metals Green Clean-Up Strategy: Prospects, Challenges, and Opportunities. Microorganisms 2022; 10:microorganisms10030610. [PMID: 35336185 PMCID: PMC8953973 DOI: 10.3390/microorganisms10030610] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/09/2022] [Accepted: 03/10/2022] [Indexed: 12/17/2022] Open
Abstract
Rapid industrialization has led to the pollution of soil and water by various types of contaminants. Heavy metals (HMs) are considered the most reactive toxic contaminants, even at low concentrations, which cause health problems through accumulation in the food chain and water. Remediation using conventional methods, including physical and chemical techniques, is a costly treatment process and generates toxic by-products, which may negatively affect the surrounding environment. Therefore, biosorption has attracted significant research interest in the recent decades. In contrast to existing methods, bacterial biomass offers a potential alternative for recovering toxic/persistent HMs from the environment through different mechanisms for metal ion uptake. This review provides an outlook of the advantages and disadvantages of the current bioremediation technologies and describes bacterial groups, especially extremophiles with biosorbent potential for heavy metal removal with relevant examples and perspectives.
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38
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Ul Haq H, Huang W, Li Y, Zhang T, Ma S, Zhang Y, Song Y, Lin D, Tian B. Genetic and genomic characterization of multidrug resistant Bacillus subtilis M3 isolated from an activated sludge reactor treating wastewater. Biologia (Bratisl) 2022. [DOI: 10.1007/s11756-021-01006-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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