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Neethu CS, Saravanakumar C, Purvaja R, Robin RS, Ramesh R. Arsenic resistance and horizontal gene transfer are associated with carbon and nitrogen enrichment in bacteria. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 311:119937. [PMID: 35977641 DOI: 10.1016/j.envpol.2022.119937] [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: 04/01/2022] [Revised: 07/14/2022] [Accepted: 08/07/2022] [Indexed: 06/15/2023]
Abstract
Coastal waters are confluences receiving large amounts of point and non-point sources of pollution. An attempt was made to explore microbial community interactions in response to carbon, nitrogen and metal pollution. Additionally, experiments were designed to analyze the influence of these factors on horizontal gene transfer (HGT). Shift in bacterial diversity dynamics by arsenic stress and nutrient addition in coastal waters was explored by metagenomics of microcosm setups. Phylogenetic analysis revealed equal distribution of Gammaproteobacteria (29%) and Betaproteobacteria (28%) in control microcosm. This proportional diversity from control switched to unique distribution of Gammaproteobacteria (44.5%)> Flavobacteria (17.7%)> Bacteriodia (11.92%)> Betaproteobacteria (11.52%) in microcosm supplemented with carbon, nitrogen and metal (C + N + M). Among metal-stressed systems, alpha diversity analysis indicated highest diversity of genera in C + N + M followed by N + M > C+M> metal alone. Arsenic and ampicillin sensitive E. coli XL1 blue and environmental strains (Vibrio tubiashii W85 and E. coli W101) were tested for efficiency of uptake of plasmid (P) pUCminusMCS (arsBRampR) under varying stress conditions. Transformation experiments revealed that combined effect of carbon, nitrogen and metal on horizontal gene transfer (HGT) was significantly higher (p < 0.01) than individual factors. The effect of carbon on HGT was proved to be superior to nitrogen under metal stressed conditions. Presence of arsenic in experimental setups (P + M, P + N + M and P + C + M) enhanced the HGT compared to non-metal counterparts supplemented with carbon or nitrogen. Arsenic resistant bacterial isolates (n = 200) were tested for the ability to utilize various carbon and nitrogen substrates and distinct positive correlation (p < 0.001) was found between arsenic resistance and utilization of urea and nitrate. However, evident positive correlation was not found between carbon sources and arsenic resistance. Our findings suggest that carbon and nitrogen pollution in aquatic habitats under arsenic stress determine the microbial community dynamics and critically influence uptake of genetic material from the surrounding environment.
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Affiliation(s)
- C S Neethu
- National Centre for Sustainable Coastal Management (NCSCM), Ministry of Environment, Forest and Climate Change (MoEFCC), Chennai 600025, India
| | - C Saravanakumar
- National Centre for Sustainable Coastal Management (NCSCM), Ministry of Environment, Forest and Climate Change (MoEFCC), Chennai 600025, India
| | - R Purvaja
- National Centre for Sustainable Coastal Management (NCSCM), Ministry of Environment, Forest and Climate Change (MoEFCC), Chennai 600025, India
| | - R S Robin
- National Centre for Sustainable Coastal Management (NCSCM), Ministry of Environment, Forest and Climate Change (MoEFCC), Chennai 600025, India
| | - R Ramesh
- National Centre for Sustainable Coastal Management (NCSCM), Ministry of Environment, Forest and Climate Change (MoEFCC), Chennai 600025, India.
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Yang X, Li Y, Ma J, Wu F, Wang L, Sun L, Zhang P, Wang W, Xu J. Comparative physiological and soil microbial community structural analysis revealed that selenium alleviates cadmium stress in Perilla frutescens. FRONTIERS IN PLANT SCIENCE 2022; 13:1022935. [PMID: 36275509 PMCID: PMC9585217 DOI: 10.3389/fpls.2022.1022935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Cadmium (Cd) toxicity not only affects plant growth and development, but also affects human health through the food chain. Several studies have demonstrated that Selenium (Se) alleviates Cd stress in plants; however, whether and how Se-alleviated Cd stress by regulating the structure of soil microbial community remain largely unclear. Here, we investigated the alleviating effects of exogenous applied Se (foliar spraying or root application) on plant growth under Cd stress in perilla (Perilla frutescens L.) by measuring the biomass, photosynthetic fluorescence parameters, root cell wall components and soil microbial community structure and diversity. Under Cd stress, perilla seedlings supplemented with Se increased chlorophyll content. Foliar spraying Se increased the levels of relative chlorophyll content (ΦII), photosynthetic system II (ΦPSII) and electron transport rate (ETR) in perilla leaves under Cd stress; while, root application of Se increased the levels of photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), water use efficiency (WUE) and stomatal limitation value (Ls) under Cd stress. Compared with Cd toxicity alone, root application of Se increased the contents of hemicellulosic 1 and hemicellulosic 2 in the cell wall of perilla roots. Cd toxicity or root application of Se did not affect soil bacterial community diversity. Root application of Se increased the relative abundance of Proteobacteria, Bacteroidetes, Fibrobacteres, Sphingomonas and Nitrosospira in Cd-contaminated soil, and thereby improving soil microbial community structure, finally promoting the growth of perilla seedlings.
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Affiliation(s)
- Xiaohuan Yang
- College of Horticulture, Shanxi Agricultural University, Taigu, China
- College of Agriculture, Shanxi Agricultural University, Taigu, China
| | - Ying Li
- College of Horticulture, Shanxi Agricultural University, Taigu, China
- College of Agriculture, Shanxi Agricultural University, Taigu, China
| | - Jinhu Ma
- College of Agriculture, Shanxi Agricultural University, Taigu, China
| | - Fei Wu
- College of Horticulture, Shanxi Agricultural University, Taigu, China
| | - Liyin Wang
- College of Agriculture, Shanxi Agricultural University, Taigu, China
| | - Liangliang Sun
- College of Horticulture, Shanxi Agricultural University, Taigu, China
| | - Ping Zhang
- College of Horticulture, Shanxi Agricultural University, Taigu, China
| | - Wenying Wang
- College of Life Science, Qinghai Normal University, Xining, China
| | - Jin Xu
- College of Horticulture, Shanxi Agricultural University, Taigu, China
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Lin ZJ, Zhou ZC, Zhu L, Meng LX, Shuai XY, Sun YJ, Chen H. Behavior of antibiotic resistance genes in a wastewater treatment plant with different upgrading processes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 771:144814. [PMID: 33540158 DOI: 10.1016/j.scitotenv.2020.144814] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/18/2020] [Accepted: 12/20/2020] [Indexed: 06/12/2023]
Abstract
Wastewater treatment plants (WWTPs) in China have been upgraded or renovated with a variety of emerging processes, but a comprehensive understanding of the behavior of antibiotic resistance genes (ARGs) in these WWTPs is still lacking. Here, the distribution of ARGs and bacterial community were investigated in a wastewater treatment plant with upgrading processes (WWTP-UP). 238 unique ARGs were detected in all samples. During the study period, the average ARGs concentration decreased by 98.4% along the entire treatment process. The removal efficiency of A2/O-membrane bioreactor (MBR) process was significantly higher than that of A2/O-high efficiency flocculent settling/cloth media filter (HEFS/CMF) process (p < 0.05), which corresponded to 3.5 and 2.1 log values on average, respectively. Notably, 35 ARGs and 14 mobile genetic elements (MGEs) were persistent in all samples. Based on the co-occurrence pattern revealed by network analysis, persistent ARGs possibly spread through the transfer of persistent MGEs among persistent bacteria. Using multiple linear regression analysis, we obtained 3 to 5 possible indicators for major ARG types, which might be served to evaluate the general distribution of ARGs or even predict the abundance of different ARG types. Our findings provide new insights into the impacts of upgrading process on ARGs and highlight the need for better strategies to improve ARGs elimination in WWTPs.
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Affiliation(s)
- Ze-Jun Lin
- Institute of Environmental Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Zhen-Chao Zhou
- Institute of Environmental Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Lin Zhu
- Institute of Environmental Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Ling-Xuan Meng
- Institute of Environmental Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xin-Yi Shuai
- Institute of Environmental Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yu-Jie Sun
- Institute of Environmental Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Hong Chen
- Institute of Environmental Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
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Detection of pathogenic bacteria in hot tap water using the qPCR method: preliminary research. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0533-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Wu Q, Lu C, Ni M, Wang H, Liu W, Chen J. Streptomyces lydicus A01 affects soil microbial diversity, improving growth and resilience in tomato. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2019; 61:182-196. [PMID: 30255551 DOI: 10.1111/jipb.12724] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 09/18/2018] [Indexed: 05/27/2023]
Abstract
The actinomycete Streptomyces lydicus A01 promotes tomato seedling growth; however, the underlying mechanism is unclear. In this study, we investigated whether changes in soil microbial diversity, following Streptomyces lydicus A01 treatment, were responsible for the increased tomato seedling growth. Eukaryotic 18S ribosomal DNA (rDNA) sequencing showed that S. lydicus A01-treated and untreated soil shared 193 operational taxonomic units (OTUs), whereas bacterial 16S rDNA sequencing identified 1,219 shared OTUs between the treated and untreated soil. Of the 42 dominant eukaryotic OTUs, eight were significantly increased and six were significantly decreased after A01 treatment. Of the 25 dominant bacterial OTUs, 12 were significantly increased and eight were significantly decreased after A01 treatment. Most of the eukaryotes and bacteria that increased in abundance exhibited growth promoting characteristics, which were mainly predicted to be associated with mineralization of nitrogen and phosphorus, phosphate solubilization, nutrient accumulation, and secretion of auxin, whereas some were related to plant protection, such as the degradation of toxic and hazardous substances. Soil composition tests showed that S. lydicus A01 treatment enhanced the utilization of nitrogen, phosphorus, and potassium in tomato seedlings. Thus, microbial fertilizers based on S. lydicus A01 may improve plant growth, without the detriment effects of chemical fertilizers.
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Affiliation(s)
- Qiong Wu
- The Key laboratory of Urban (South) Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- Laboratory of Biological Microbiology, Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Caige Lu
- Laboratory of Biological Microbiology, Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Mi Ni
- Laboratory of Biological Microbiology, Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Hongli Wang
- Laboratory of Biological Microbiology, Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Weicheng Liu
- Laboratory of Biological Microbiology, Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Jie Chen
- The Key laboratory of Urban (South) Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
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Mukherjee N, Bartelli D, Patra C, Chauhan BV, Dowd SE, Banerjee P. Microbial Diversity of Source and Point-of-Use Water in Rural Haiti - A Pyrosequencing-Based Metagenomic Survey. PLoS One 2016; 11:e0167353. [PMID: 27936055 PMCID: PMC5147895 DOI: 10.1371/journal.pone.0167353] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 11/12/2016] [Indexed: 12/26/2022] Open
Abstract
Haiti endures the poorest water and sanitation infrastructure in the Western Hemisphere, where waterborne diseases cause significant morbidity and mortality. Most of these diseases are reported to be caused by waterborne pathogens. In this study, we examined the overall bacterial diversity of selected source and point-of-use water from rural areas in Central Plateau, Haiti using pyrosequencing of 16s rRNA genes. Taxonomic composition of water samples revealed an abundance of Firmicutes phyla, followed by Proteobacteria and Bacteroidetes. A total of 38 bacterial families and 60 genera were identified. The presence of several Klebsiella spp. (tentatively, K. pneumoniae, K. variicola and other Klebsiella spp.) was detected in most water samples. Several other human pathogens such as Aeromonas, Bacillus, Clostridium, and Yersinia constituted significantly higher proportion of bacterial communities in the point-of-use water samples compared to source water. Bacterial genera traditionally associated with biofilm formation, such as Chryseobacterium, Fusobacterium, Prevotella, Pseudomonas were found in the point-of-use waters obtained from water filters or domestic water storage containers. Although the pyrosequencing method utilized in this study did not reveal the viability status of these pathogens, the abundance of genetic footprints of the pathogens in water samples indicate the probable risk of bacterial transmission to humans. Therefore, the importance of appropriate handling, purification, and treatment of the source water needed to be clearly communicated to the communities in rural Haiti to ensure the water is safe for their daily use and intake.
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Affiliation(s)
- Nabanita Mukherjee
- Division of Epidemiology, Biostatistics, and Environmental Health, School of Public Health, University of Memphis, Desoto Avenue, Memphis, Tennessee, United States of America
| | - Debra Bartelli
- Division of Epidemiology, Biostatistics, and Environmental Health, School of Public Health, University of Memphis, Desoto Avenue, Memphis, Tennessee, United States of America
| | - Cyril Patra
- Division of Epidemiology, Biostatistics, and Environmental Health, School of Public Health, University of Memphis, Desoto Avenue, Memphis, Tennessee, United States of America
| | - Bhavin V. Chauhan
- Division of Epidemiology, Biostatistics, and Environmental Health, School of Public Health, University of Memphis, Desoto Avenue, Memphis, Tennessee, United States of America
| | - Scot E. Dowd
- Molecular Research LP (MR DNA), Shallowater, Texas, United States of America
| | - Pratik Banerjee
- Division of Epidemiology, Biostatistics, and Environmental Health, School of Public Health, University of Memphis, Desoto Avenue, Memphis, Tennessee, United States of America
- * E-mail:
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Forbes JD, Van Domselaar G, Sargent M, Green C, Springthorpe S, Krause DO, Bernstein CN. Microbiome profiling of drinking water in relation to incidence of inflammatory bowel disease. Can J Microbiol 2016; 62:781-93. [PMID: 27420183 DOI: 10.1139/cjm-2016-0219] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The etiology of inflammatory bowel disease (IBD) is unknown; current research is focused on determining environmental factors. One consideration is drinking water: water systems harbour considerable microbial diversity, with bacterial concentrations estimated at 10(6)-10(8) cells/L. Perhaps differences in microbial ecology of water sources may impact differential incidence rates of IBD. Regions of Manitoba were geographically mapped according to incidence rates of IBD and identified as high (HIA) or low (LIA) incidence areas. Bulk water, filter material, and pipe wall samples were collected from public buildings in different jurisdictions and their population structure analyzed using 16S rDNA sequencing. At the phylum level, Proteobacteria were observed significantly less frequently (P = 0.02) in HIA versus LIA. The abundance of Proteobacteria was also found to vary according to water treatment distribution networks. Gammaproteobacteria was the most abundant class of bacteria and was observed more frequently (P = 0.006) in LIA. At the genus level, microbes found to associate with HIA include Bradyrhizobium (P = 0.02) and Pseudomonas (P = 0.02). Particular microbes were found to associate with LIA or HIA, based on sample location and (or) type. This work lays out a basis for further studies exploring water as a potential environmental source for IBD triggers.
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Affiliation(s)
- Jessica D Forbes
- a Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Manitoba, Canada.,b National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Gary Van Domselaar
- a Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Manitoba, Canada.,b National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada
| | - Michael Sargent
- c Department of Internal Medicine and the University of Manitoba IBD Clinical and Research Centre, 715 McDermot Avenue, Winnipeg, MB R3E 3P4, Canada
| | - Chris Green
- d Department of Community Health Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, MB R3E 0W3, Canada
| | - Susan Springthorpe
- e Centre for Research on Environmental Microbiology, University of Ottawa, Ottawa, Ontario, Canada
| | - Denis O Krause
- a Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Charles N Bernstein
- c Department of Internal Medicine and the University of Manitoba IBD Clinical and Research Centre, 715 McDermot Avenue, Winnipeg, MB R3E 3P4, Canada
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Bai Y, Liang J, Liu R, Hu C, Qu J. Metagenomic analysis reveals microbial diversity and function in the rhizosphere soil of a constructed wetland. ENVIRONMENTAL TECHNOLOGY 2014; 35:2521-2527. [PMID: 25145207 DOI: 10.1080/09593330.2014.911361] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Microbial communities play a critical role in the degradation of effluent contaminants in constructed wetlands. Many questions remain, however, regarding the role ofmicrobial communities in rhizospheric soil. In this study, we used metagenomic analysis to assess microbial community composition and function in a constructed wetland receiving surface water. The diversity of the microbial community of rhizosphere soil was found to be significantly greater than that of the wetland influent water. This enhancement is likely due to the availability of diverse habitats and nutrients provided by the wetland plants. From function annotation of metagenomic data, a number of biodegradation pathways associated with 14 xenobiotic compounds were identified in soil. Nitrogen fixation, nitrification and denitrification genes were semi-quantitatively analysed. By screening of manganese transformation genes, we found that the biological oxidation of Mn2+ (mainly catalysed by multicopper oxidase) in the influent water yielded insoluble Mn4+, which subsequently precipitated and were incorporated into the wetland soil. These data show that the use of metagenomic analysis can provide important new insights for the study of wetland ecosystems and, in particular, how biologically mediated transformation or degradation can be used to reduce contamination of point and non-point source wastewater.
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