1
|
Zhuo T, He L, Chai B, Zhou S, Wan Q, Lei X, Zhou Z, Chen B. Micro-pressure promotes endogenous phosphorus release in a deep reservoir by favouring microbial phosphate mineralisation and solubilisation coupled with sulphate reduction. WATER RESEARCH 2023; 245:120647. [PMID: 37738938 DOI: 10.1016/j.watres.2023.120647] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 09/10/2023] [Accepted: 09/17/2023] [Indexed: 09/24/2023]
Abstract
Deep reservoirs vary in their hydrostatic pressure owing to artificial water level control. The potential migration of phosphorus (P) in reservoir sediments raises the risk of harmful algal blooms. To ascertain the mechanisms of endogenous P release in reservoirs, we characterised aquatic microbial communities associated with coupled iron (Fe), P and sulphur (S) cycling at the sediment-water interface. The responses of microbial communities to hydrostatic pressures of 0.2-0.7 mega pascals (MPa; that is, micro-pressures) were investigated through a 30-day simulation experiment. Our findings unravelled a potential mechanism that micro-pressure enhanced the solubilisation of Fe/aluminium (Al)-bound P caused by microbially-driven sulphate reduction, leading to endogenous P release in the deep reservoir. Although the vertical distribution of labile Fe was not affected by pressure changes, we did observe Fe resupply at sediment depths of 2-5 cm. Metagenomic analysis revealed increased abundances of functional genes for P mineralisation (phoD, phoA), P solubilisation (pqqC, ppx-gppA) and sulphate reduction (cysD, cysC) in sediments subjected to micro-pressure, which contrasted with the pattern of S oxidation gene (soxB). There was a tight connection between P and S cycling-related microbial communities, based on significant positive correlations between labile element (P and S) concentrations and functional gene (phoD, cysD) abundances. This provided strong support that Fe-P-S coupling processes were governed by micro-pressure through modulation of P and S cycling-related microbial functions. Key taxa involved in P and S cycling (for example, Bradyrhizobium, Methyloceanibacter) positively responded to micro-pressure and as such, indirectly drove P release from sediments by facilitating P mineralisation and solubilisation coupled with sulphate reduction.
Collapse
Affiliation(s)
- Tianyu Zhuo
- School of Environmental Science and Engineering, Tianjin University, Jinnan District, Tianjin 300350, China
| | - Lixin He
- Hebei Collaborative Innovation Center for the Regulation and Comprehensive Management of Water Resources and Water Environment, Hebei University of Engineering, Handan 056038, China; Hebei Key Laboratory of Intelligent Water Conservancy, School of Water Conservancy and Hydroelectric, Hebei University of Engineering, Handan 056038, China
| | - Beibei Chai
- Hebei Collaborative Innovation Center for the Regulation and Comprehensive Management of Water Resources and Water Environment, Hebei University of Engineering, Handan 056038, China; Hebei Key Laboratory of Intelligent Water Conservancy, School of Water Conservancy and Hydroelectric, Hebei University of Engineering, Handan 056038, China.
| | - Shilei Zhou
- Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Qiong Wan
- School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Xiaohui Lei
- State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China.
| | - Zhenming Zhou
- College of Civil Engineering, Huaqiao University, Xiamen 361021, China
| | - Bin Chen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China
| |
Collapse
|
2
|
Han S, Tang R, Yang S, Xie CJ, Narsing Rao MP, Rensing C, Liu GH, Zhou SG. Geothrix oryzisoli sp. nov., a ferric iron-reducing bacterium isolated from paddy soil. Antonie Van Leeuwenhoek 2023; 116:477-486. [PMID: 36897496 DOI: 10.1007/s10482-023-01817-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 02/18/2023] [Indexed: 03/11/2023]
Abstract
An anaerobic, Gram-staining-negative, rod-shaped, Fe(III)-reducing strain, designated SG189T, was isolated from paddy soil in Fujian Province, China. Growth occurred at 20-35 ℃ (optimum 30 ℃), pH 6.5-8.0 (optimum 7.0) and 0-0.2% (w/v) NaCl (optimum 0%). The strain SG189T showed the highest 16S rRNA sequences similarities to the type strains of Geothrix fermentans DSM 14018T (98.9%), "Geothrix terrae" SG184T (99.0%) and "Geothrix alkalitolerans" SG263T (99.3%). ANI and dDDH values between strain SG189T and the most closely related Geothrix species were 86.5-87.1% and 31.5-32.9%, which lower than the cut-off values (ANI 95-96% and dDDH 70%) for prokaryotic species delineation. Further, genome-based phylogenomic trees constructed using 81 core genes (UBCG2) and 120 conserved genes (GTDB) showed that strain SG189T formed a clade with members of the genus Geothrix. The menaquinone was shown to be MK-8, and the major fatty acids were iso-C15:0 and iso-C13:0 3OH. The genomic DNA G + C content was 68.2%. Additionally, we found that strain SG189T possessed ability to reduce ferric iron, and strain SG189T could reduce 10 mM of ferric citrate in 10 days with lactate as the sole electron donor. Based on the observed physiological and biochemical properties, chemotaxonomic characteristics, ANI and dDDH values, SG189T represents a novel species of the genus Geothrix, for which the name Geothrix oryzisoli sp. nov. is proposed. The type strain is SG189T (= GDMCC 1.3408T = JCM 39324T).
Collapse
Affiliation(s)
- Shuang Han
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, People's Republic of China
| | - Rong Tang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, People's Republic of China
| | - Shang Yang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, People's Republic of China
| | - Cheng-Jie Xie
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, People's Republic of China
| | - Manik Prabhu Narsing Rao
- Programa de Doctorado en Ciencias Aplicadas, Universidad Autónoma de Chile, Talca, 3460000, Chile
| | - Christopher Rensing
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, People's Republic of China
| | - Guo-Hong Liu
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350003, Fujian, People's Republic of China.
| | - Shun-Gui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, People's Republic of China.
| |
Collapse
|
3
|
Han S, Tang R, Yang S, Xie CJ, Narsing Rao MP, Liu GH, Zhou SG. Two ferric-reducing bacteria Geothrix terrae sp. nov. and Geothrix alkalitolerans sp. nov., isolated from paddy soil. Arch Microbiol 2022; 204:699. [DOI: 10.1007/s00203-022-03293-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/10/2022] [Accepted: 10/18/2022] [Indexed: 11/12/2022]
|
4
|
Genomic Analysis Reveals Adaptation of Vibrio campbellii to the Hadal Ocean. Appl Environ Microbiol 2022; 88:e0057522. [PMID: 35916502 PMCID: PMC9397096 DOI: 10.1128/aem.00575-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The genus Vibrio is characterized by high metabolic flexibility and genome plasticity and is widely distributed in the ocean from euphotic layers to deep-sea environments. The relationship between genome features and environmental adaptation strategies of Vibrio has been extensively investigated in coastal environments, yet very little is known about their survival strategies in oligotrophic deep-sea. In this study, we compared genomes of five Vibrio campbellii strains isolated from the Mariana and Yap Trenches at different water depths, including two epipelagic strains and three hadopelagic strains, to identify genomic characteristics that facilitate survival in the deep sea. Genome streamlining is found in pelagic strains, such as smaller genome sizes, lower G+C contents, and higher gene densities, which might be caused by long-term residence in an oligotrophic environment. Phylogenetic results showed that these five Vibrio strains are clustered into two clades according to their collection depth. Indeed, hadopelagic isolates harbor more genes involved in amino acid metabolism and transport, cell wall/membrane/envelope biogenesis, and inorganic ion transport and metabolism through comparative genomics analysis. Specific macrolide export gene and more tellurite resistance genes present in hadopelagic strains by the annotation of antibiotic and metal resistance genes. In addition, several genes related to substrate degradation are enriched in hadopelagic strains, such as chitinase genes, neopullulanase genes, and biopolymer transporter genes. In contrast, epipelagic strains are unique in their capacity for assimilatory nitrate reduction. The genomic characteristics investigated here provide insights into how Vibrio adapts to the deep-sea environment through genomic evolution. IMPORTANCE With the development of deep-sea sampling technology, an increasing number of deep-sea Vibrio strains have been isolated, but the adaptation mechanism of these eutrophic Vibrio strains to the deep-sea environment is unclear. Here, our results show that the genome of pelagic Vibrio is streamlined to adapt to a long-term oligotrophic environment. Through a phylogenomic analysis, we find that genomic changes in marine Vibrio campbellii strains are related to water depth. Our data suggest that an increase in genes related to antibiotic resistance, degradation of macromolecular and refractory substrates, and utilization of rare ions is related to the adaptation of V. campbellii strains to adapt to hadal environments, and most of the increased genes were acquired by horizontal gene transfer. These findings may deepen our understanding of adaptation strategies of marine bacteria to the extreme environment in hadal zones.
Collapse
|
5
|
Cario A, Oliver GC, Rogers KL. Characterizing the Piezosphere: The Effects of Decompression on Microbial Growth Dynamics. Front Microbiol 2022; 13:867340. [PMID: 35663870 PMCID: PMC9157427 DOI: 10.3389/fmicb.2022.867340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 04/20/2022] [Indexed: 12/04/2022] Open
Abstract
The extent to which the full diversity of the subsurface microbiome can be captured via cultivation is likely hindered by the inevitable loss of cellular viability from decompression during sampling, enrichment, and isolation. Furthermore, the pressure tolerance of previously isolated strains that span surface and subsurface ecosystems can shed light into microbial activity and pressure adaptation in these transition zones. However, assessments of the effects of elevated pressure on the physiology of piezotolerant and piezosensitive species may be biased by high-pressure enrichment techniques. Here, we compared two high-pressure cultivation techniques-one that requires decompression of the whole cultures during sampling and one that employs the previously described isobaric PUSH devices-to explore the effects of repeated decompression during incubations performed to characterize isolates from deep environments. Two model sulfate-reducing prokaryotes were used to test the effects of decompression/repressurization cycles on growth rates, cell yields, and pressure tolerance. The mesophilic bacterium Desulfovibrio salexigens was cultivated from 0.1 to 50 MPa, and the hyperthermophilic archaeon Archaeoglobus fulgidus was tested from 0.1 to 98 MPa. For both cultivation methods, D. salexigens showed exponential growth up to 20 MPa, but faster growth rates were observed for isobaric cultivation. Furthermore, at 30 MPa minor growth was observed in D. salexigens cultures only for isobaric conditions. Isobaric conditions also extended exponential growth of A. fulgidus to 60 MPa, compared to 50 MPa when cultures were decompressed during subsampling. For both strains, growth rates and cell yields decreased with increasing pressures, and the most pronounced effects of decompression were observed at the higher end of the pressure ranges. These results highlight that repeated decompression can have a significant negative impact on cell viability, suggesting that decompression tolerance may depend on habitat depth. Furthermore, sampling, enrichment, and cultivation in isobaric devices is critical not only to explore the portion of the deep biosphere that is sensitive to decompression, but also to better characterize the pressure limits and growth characteristics of piezotolerant and piezosensitive species that span surface and subsurface ecosystems.
Collapse
Affiliation(s)
- Anaïs Cario
- Department of Earth and Environmental Sciences, Rensselaer Polytechnic Institute, Troy, NY, United States
| | - Gina C. Oliver
- Department of Earth and Environmental Sciences, Rensselaer Polytechnic Institute, Troy, NY, United States
| | - Karyn L. Rogers
- Department of Earth and Environmental Sciences, Rensselaer Polytechnic Institute, Troy, NY, United States
- Rensselaer Astrobiology Research and Education Center, Rensselaer Polytechnic Institute, Troy, NY, United States
| |
Collapse
|
6
|
Yadav S, Villanueva L, Bale N, Koenen M, Hopmans EC, Damsté JSS. Physiological, chemotaxonomic and genomic characterization of two novel piezotolerant bacteria of the family Marinifilaceae isolated from sulfidic waters of the Black Sea. Syst Appl Microbiol 2020; 43:126122. [PMID: 32847788 DOI: 10.1016/j.syapm.2020.126122] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 11/17/2022]
Abstract
Diversity analyses of microbial enrichments obtained from deep sulfidic water (2000 m) collected from the Black Sea indicated the presence of eleven novel putative lineages of bacteria affiliated to the family Marinifilaceae of the phylum Bacteroidetes. Pure cultures were obtained for four strains (i.e. M1PT, M3P, A4T and 44) of this family, which could be grouped into two different clades based on their 16S rRNA gene sequences. All four strains were Gram-negative, rod-shaped and facultative anaerobic bacteria. The genomes of all strains were sequenced and physiological analyses were performed. All strains utilized a wide range of carbon sources, which was supported by the presence of the pathways involved in carbon utilization encoded by their genomes. The strains were able to grow at elevated hydrostatic pressure (up to 50 MPa), which coincided with increased production of unsaturated and branched fatty acids, and a decrease in hydroxy fatty acids. Intact polar lipid analysis of all four strains showed the production of ornithine lipids, phosphatidylethanolamines and capnine lipids as major intact polar lipids (IPLs). Genes involved in hopanoid biosynthesis were also identified. However, bacteriohopanepolyols (BHPs) were not detected in the strains. Based on distinct physiological, chemotaxonomic, genotypic and phylogenetic differences compared to other members of the genera Ancylomarina and Labilibaculum, it was concluded that strains M1PT and A4T represented two novel species for which the names Ancylomarina euxinus sp. nov. and Labilibaculum euxinus sp. nov., respectively, are proposed.
Collapse
Affiliation(s)
- Subhash Yadav
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands.
| | - Laura Villanueva
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands; Faculty of Geosciences, Department of Earth Sciences, Utrecht University, P.O. Box 80.021, 3508 TA Utrecht, The Netherlands
| | - Nicole Bale
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands
| | - Michel Koenen
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands
| | - Ellen C Hopmans
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands
| | - Jaap S Sinninghe Damsté
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands; Faculty of Geosciences, Department of Earth Sciences, Utrecht University, P.O. Box 80.021, 3508 TA Utrecht, The Netherlands
| |
Collapse
|
7
|
Foglia F, Hazael R, Meersman F, Wilding MC, Sakai VG, Rogers S, Bove LE, Koza MM, Moulin M, Haertlein M, Forsyth VT, McMillan PF. In Vivo Water Dynamics in Shewanella oneidensis Bacteria at High Pressure. Sci Rep 2019; 9:8716. [PMID: 31213614 PMCID: PMC6581952 DOI: 10.1038/s41598-019-44704-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 05/15/2019] [Indexed: 11/10/2022] Open
Abstract
Following observations of survival of microbes and other life forms in deep subsurface environments it is necessary to understand their biological functioning under high pressure conditions. Key aspects of biochemical reactions and transport processes within cells are determined by the intracellular water dynamics. We studied water diffusion and rotational relaxation in live Shewanella oneidensis bacteria at pressures up to 500 MPa using quasi-elastic neutron scattering (QENS). The intracellular diffusion exhibits a significantly greater slowdown (by −10–30%) and an increase in rotational relaxation times (+10–40%) compared with water dynamics in the aqueous solutions used to resuspend the bacterial samples. Those results indicate both a pressure-induced viscosity increase and slowdown in ionic/macromolecular transport properties within the cells affecting the rates of metabolic and other biological processes. Our new data support emerging models for intracellular organisation with nanoscale water channels threading between macromolecular regions within a dynamically organized structure rather than a homogenous gel-like cytoplasm.
Collapse
Affiliation(s)
- Fabrizia Foglia
- Chemistry Department, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Rachael Hazael
- Survivability and Advanced Materials group, Centre for Defence Engineering, Cranfield University at the Defence Academy of the UK, Shrivenham, SN6 8LA, UK
| | - Filip Meersman
- Chemistry Department, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.,Biomolecular & Analytical Mass Spectrometry, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - Martin C Wilding
- Materials Engineering, Sheffield Hallam University, Howard Street, Sheffield, S1 1WB, UK
| | | | - Sarah Rogers
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Chilton, OX11 0QX, UK
| | - Livia E Bove
- Dipartimento di Fisica, Università di Roma "La Sapienza", 00185, Roma, Italy.,Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS UMR 7590, Université Pierre et Marie Curie, F-75252, Paris, France
| | - Michael Marek Koza
- Institut Laue Langevin, 6 Rue Jules Horowitz, BP 156, 38042, Grenoble, Cedex, France
| | - Martine Moulin
- Life Sciences Group, Carl-Ivar Brändén Building, Institut Laue-Langevin, 71 avenue des Martyrs, 38042, Grenoble, cedex 9, France
| | - Michael Haertlein
- Life Sciences Group, Carl-Ivar Brändén Building, Institut Laue-Langevin, 71 avenue des Martyrs, 38042, Grenoble, cedex 9, France
| | - V Trevor Forsyth
- Life Sciences Group, Carl-Ivar Brändén Building, Institut Laue-Langevin, 71 avenue des Martyrs, 38042, Grenoble, cedex 9, France.,Faculty of Natural Sciences/ISTM, Keele University, Staffordshire, ST5 5BG, UK
| | - Paul F McMillan
- Chemistry Department, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| |
Collapse
|
8
|
Liu W, Wu Y, Liu T, Li F, Dong H, Jing M. Influence of Incubation Temperature on 9,10-Anthraquinone-2-Sulfonate (AQS)-Mediated Extracellular Electron Transfer. Front Microbiol 2019; 10:464. [PMID: 30894849 PMCID: PMC6414795 DOI: 10.3389/fmicb.2019.00464] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 02/21/2019] [Indexed: 11/13/2022] Open
Abstract
The electron shuttling process has been recognized as an important microbial respiration process. Because the incubation temperature can influence both the reactivity of electron mediators and cell growth, it may also affect the electron-shuttle-mediated extracellular electron transfer (EET) process. Here, the effect of incubation temperature (22-38°C) was investigated in a bioelectrochemical system (BES) using Shewanella oneidensis MR-1 and 50 μM of 9,10-anthraquinone-2-sulfonate (AQS). We found that current generation increased as the temperature was increased from 22 to 34°C and then decreased sharply at 38°C. The biofilm biomass, as indicated by the total protein extracted from the electrode, increased as the temperature increased from 22 to 34°C and then decreased at 38°C, mirroring the current generation results. These results were further confirmed by increasing the temperature slowly, step-by-step, in a single BES with a constant biofilm biomass, suggesting that the EET rates could be substantially influenced by temperature, even with the same biofilm. The effects of temperature on the AQS bioreduction rate, c-type cytochrome (c-Cyts)-bound-cofactor-mediated EET, the AQS mid-point potential, and the AQS diffusion coefficient were studied. From these results, we were able to conclude that temperature influenced the EET rates by changing the c-Cyts-bound-cofactor-mediated EET process and the AQS bioreduction rate, and that the change in biofilm formation was a dominant factor influencing the overall EET rates. These findings should contribute to the fundamental understanding of EET processes. Moreover, optimization of the operating parameters for current generation will be helpful for the practical application of bioelectrochemical techniques.
Collapse
Affiliation(s)
- Wei Liu
- College of Materials and Energy, South China Agricultural University, Guangzhou, China
| | - Yundang Wu
- Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental Science and Technology, Guangzhou, China
| | - Tongxu Liu
- Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental Science and Technology, Guangzhou, China
| | - Fangbai Li
- Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental Science and Technology, Guangzhou, China
| | - Hui Dong
- College of Materials and Energy, South China Agricultural University, Guangzhou, China
| | - Meiqing Jing
- Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental Science and Technology, Guangzhou, China
| |
Collapse
|
9
|
Zhang L, Jun YS. The Role of Fe-Bearing Phyllosilicates in DTPMP Degradation under High-Temperature and High-Pressure Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:9522-9530. [PMID: 30048125 DOI: 10.1021/acs.est.8b02552] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To ensure safer and more efficient unconventional oil/gas recovery and other energy-related subsurface operations, it is important to understand the effects of abundant Fe-bearing phyllosilicates on the degradation of phosphonates, which are applied to inhibit scale formation. In this study, under subsurface relevant conditions (i.e., slightly oxic owing to oxygen-containing injection, 50-95 °C, and 102 atm CO2), we reacted 0.5 mM DTPMP (diethylenetriaminepenta(methylene)phosphonate, a model phosphonate) with three phyllosilicates: an Fe-poor muscovite, an Fe(II)-rich biotite, and an Fe(III)-rich nontronite. The three phyllosilicates induced different effects on DTPMP degradation, with no distinguishable effect by muscovite, slight promotion by nontronite, and remarkable promotion by biotite. We found that Fe associated with phyllosilicates is key to the redox degradation of DTPMP: reactive oxygen species (ROS) were generated through the reduction of molecular oxygen by Fe(II) adsorbed on the mineral surface or in the mineral structure, and the hydroxyl radicals further degraded DTPMP to form phosphate, formate, and DTPMP residuals. In addition, DTPMP degradation was favored at higher temperatures, probably resulting from more exposed reactive Fe(II) sites created by enhanced biotite dissolution and also from faster electron transfers. Dissolved Fe and Al precipitated with phosphate or degraded DTPMP and formed secondary minerals. This study provides new information about how DTPMP degradation is affected by the presence of Fe-bearing phyllosilicates under high-temperature and high-pressure conditions and has implications for engineered subsurface operations.
Collapse
Affiliation(s)
- Lijie Zhang
- Department of Energy, Environmental & Chemical Engineering , Washington University in St. Louis , St. Louis , Missouri 63130 , United States
| | - Young-Shin Jun
- Department of Energy, Environmental & Chemical Engineering , Washington University in St. Louis , St. Louis , Missouri 63130 , United States
| |
Collapse
|
10
|
Xiong L, Jian H, Zhang Y, Xiao X. The Two Sets of DMSO Respiratory Systems of Shewanella piezotolerans WP3 Are Involved in Deep Sea Environmental Adaptation. Front Microbiol 2016; 7:1418. [PMID: 27656177 PMCID: PMC5013071 DOI: 10.3389/fmicb.2016.01418] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 08/26/2016] [Indexed: 12/04/2022] Open
Abstract
Dimethyl sulfoxide (DMSO) is an abundant methylated sulfur compound in deep sea ecosystems. However, the mechanism underlying DMSO-induced reduction in benthic microorganisms is unknown. Shewanella piezotolerans WP3, which was isolated from a west Pacific deep sea sediment, can utilize DMSO as the terminal electron acceptor. In this study, two putative dms gene clusters [type I (dmsEFA1B1G1H1) and type II (dmsA2B2G2H2)] were identified in the WP3 genome. Genetic and physiological analyses demonstrated that both dms gene clusters were functional and the transcription of both gene clusters was affected by changes in pressure and temperature. Notably, the type I system is essential for WP3 to thrive under in situ conditions (4°C/20 MPa), whereas the type II system is more important under high pressure or low temperature conditions (20°C/20 MPa, 4°C/0.1 MPa). Additionally, DMSO-dependent growth conferred by the presence of both dms gene clusters was higher than growth conferred by either of the dms gene clusters alone. These data collectively suggest that the possession of two sets of DMSO respiratory systems is an adaptive strategy for WP3 survival in deep sea environments. We propose, for the first time, that deep sea microorganisms might be involved in global DMSO/DMS cycling.
Collapse
Affiliation(s)
- Lei Xiong
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University Shanghai, China
| | - Huahua Jian
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University Shanghai, China
| | - Yuxia Zhang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University Shanghai, China
| | - Xiang Xiao
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong UniversityShanghai, China; State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong UniversityShanghai, China
| |
Collapse
|
11
|
An overview of siderophores for iron acquisition in microorganisms living in the extreme. Biometals 2016; 29:551-71. [PMID: 27457587 DOI: 10.1007/s10534-016-9949-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 07/08/2016] [Indexed: 12/11/2022]
Abstract
Siderophores are iron-chelating molecules produced by microbes when intracellular iron concentrations are low. Low iron triggers a cascade of gene activation, allowing the cell to survive due to the synthesis of important proteins involved in siderophore synthesis and transport. Generally, siderophores are classified by their functional groups as catecholates, hydroxamates and hydroxycarboxylates. Although other chemical structural modifications and functional groups can be found. The functional groups participate in the iron-chelating process when the ferri-siderophore complex is formed. Classified as acidophiles, alkaliphiles, halophiles, thermophiles, psychrophiles, piezophiles, extremophiles have particular iron requirements depending on the environmental conditions in where they grow. Most of the work done in siderophore production by extremophiles is based in siderophore concentration and/or genomic studies determining the presence of siderophore synthesis and transport genes. Siderophores produced by extremophiles are not well known and more work needs to be done to elucidate chemical structures and their role in microorganism survival and metal cycling in extreme environments.
Collapse
|
12
|
Testemale D, Prat A, Lahera E, Hazemann JL. Novel high-pressure windows made of glass-like carbon for x-ray analysis. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:075115. [PMID: 27475603 DOI: 10.1063/1.4959110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 07/07/2016] [Indexed: 06/06/2023]
Abstract
Original high-pressure glass-like carbon windows developed for x-ray spectroscopy applications are presented. The scientific and technological background of this new technical development is exposed, in particular the limitations of our existing beryllium windows in the context of x-ray absorption spectroscopy (XAS) measurements of solutions with very low solute concentrations at hydrothermal conditions (0.1-200 MPa, 30-600 °C). The benefits of glass-like carbon are exposed, notably its non-crystalline character, the absence of impurities which has been verified by micro-fluorescence laboratory measurements, and its non-toxicity which makes its machining safer. Finite elements mechanical calculations and experimental pressure tests were conducted to determine the pressure limits of windows with two different geometries: cylindrical (thickness 0.5 mm) and inversed-dome shape (thickness 0.5 mm at the tip of the dome). The former break at 150 MPa and the latter show no sign of rupture at 400 MPa. Recent XAS measurements conducted with the new dome shaped windows are presented to show the advantages of the design that allow for the detection of very low concentrations in the transmission mode (down to 30 ppm) and the acquisition of fluorescence XAS spectra in diluted solutions at high pressure. Eventually the perspectives of this original development are discussed.
Collapse
Affiliation(s)
- Denis Testemale
- Institut NEEL, Université Grenoble Alpes, F-38000 Grenoble, France and Institut NEEL, CNRS, F-38000 Grenoble, France
| | - Alain Prat
- Institut NEEL, Université Grenoble Alpes, F-38000 Grenoble, France and Institut NEEL, CNRS, F-38000 Grenoble, France
| | - Eric Lahera
- Institut NEEL, Université Grenoble Alpes, F-38000 Grenoble, France and Institut NEEL, CNRS, F-38000 Grenoble, France
| | - Jean-Louis Hazemann
- Institut NEEL, Université Grenoble Alpes, F-38000 Grenoble, France and Institut NEEL, CNRS, F-38000 Grenoble, France
| |
Collapse
|
13
|
Fichtel K, Logemann J, Fichtel J, Rullkötter J, Cypionka H, Engelen B. Temperature and pressure adaptation of a sulfate reducer from the deep subsurface. Front Microbiol 2015; 6:1078. [PMID: 26500624 PMCID: PMC4594026 DOI: 10.3389/fmicb.2015.01078] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 09/21/2015] [Indexed: 11/13/2022] Open
Abstract
Microbial life in deep marine subsurface faces increasing temperatures and hydrostatic pressure with depth. In this study, we have examined growth characteristics and temperature-related adaptation of the Desulfovibrio indonesiensis strain P23 to the in situ pressure of 30 MPa. The strain originates from the deep subsurface of the eastern flank of the Juan de Fuca Ridge (IODP Site U1301). The organism was isolated at 20°C and atmospheric pressure from ~61°C-warm sediments approximately 5 m above the sediment-basement interface. In comparison to standard laboratory conditions (20°C and 0.1 MPa), faster growth was recorded when incubated at in situ pressure and high temperature (45°C), while cell filamentation was induced by further compression. The maximum growth temperature shifted from 48°C at atmospheric pressure to 50°C under high-pressure conditions. Complementary cellular lipid analyses revealed a two-step response of membrane viscosity to increasing temperature with an exchange of unsaturated by saturated fatty acids and subsequent change from branched to unbranched alkyl moieties. While temperature had a stronger effect on the degree of fatty acid saturation and restructuring of main phospholipids, pressure mainly affected branching and length of side chains. The simultaneous decrease of temperature and pressure to ambient laboratory conditions allowed the cultivation of our moderately thermophilic strain. This may in turn be one key to a successful isolation of microorganisms from the deep subsurface adapted to high temperature and pressure.
Collapse
Affiliation(s)
- Katja Fichtel
- Paleomicrobiology Group, Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, OldenburgGermany
| | - Jörn Logemann
- Organic Geochemistry Group, Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, OldenburgGermany
| | - Jörg Fichtel
- Organic Geochemistry Group, Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, OldenburgGermany
| | - Jürgen Rullkötter
- Organic Geochemistry Group, Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, OldenburgGermany
| | - Heribert Cypionka
- Paleomicrobiology Group, Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, OldenburgGermany
| | - Bert Engelen
- Paleomicrobiology Group, Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, OldenburgGermany
| |
Collapse
|