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Johnston KAKY, van Lankveld M, de Rink R, Mol AR, Keesman KJ, Buisman CJN. Influence of oxidation-reduction potential and pH on polysulfide concentrations and chain lengths in the biological desulfurization process under haloalkaline conditions. WATER RESEARCH 2024; 259:121795. [PMID: 38889663 DOI: 10.1016/j.watres.2024.121795] [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: 03/22/2024] [Revised: 04/29/2024] [Accepted: 05/16/2024] [Indexed: 06/20/2024]
Abstract
Biological desulfurization under haloalkaline conditions has been applied worldwide to remove hydrogen sulfide (H2S) from sour gas steams. The process relies on sulfide-oxidizing bacteria (SOB) to oxidize H2S to elemental sulfur (S8), which can then be recovered and reused. Recently, a dual-reactor biological desulfurization system was implemented where an anaerobic (sulfidic) bioreactor was incorporated as an addition to a micro-oxic bioreactor, allowing for higher S8 selectivity by limiting by-product formation. The highly sulfidic bioreactor environment enabled the SOB to remove (poly)sulfides (Sx2-) in the absence of oxygen, with Sx2- speculated as a main substrate in the removal pathway, thus making it vital to understand its role in the process. The SOB are influenced by the oxidation-reduction potential (ORP) set-point of the micro-oxic bioreactor as it is used to control the product of oxidation (S8 vs. SO42-), while the uptake of Sx2- by SOB has been qualitatively linked to pH. Therefore, to quantify these effects, this work determined the concentration and speciation of Sx2- in the biological desulfurization process under various pH values and ORP set-points. The total Sx2- concentrations in the sulfidic zone increased at elevated pH (8.9) compared to low pH (< 8.0), with on average 3.3 ± 1.0 mM-S more Sx2-. Chain lengths varied, with S72- only doubling in concentration while S52- increased 9 fold, which is in contrast with observations from abiotic systems. Changes to the ORP set-point of the micro-oxic reactor did not produce substantial changes in Sx2- concentration in the sulfidic zone. This illustrates that the reduction degree of the SOB in the micro-oxic bioreactor does not enhance their ability to interact with Sx2- in the sulfidic bioreactor. This increased understanding of how both pH and ORP affect changes in Sx2- concentration and chain length can lead to improved efficiency and design of the dual-reactor biological desulfurization process.
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Affiliation(s)
- Kestral A K Y Johnston
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9 8911 CE Leeuwarden, Netherlands; Environmental Technology, Wageningen University & Research, P.O. Box 17 6700 AA, Wageningen, Netherlands
| | - Mark van Lankveld
- Environmental Technology, Wageningen University & Research, P.O. Box 17 6700 AA, Wageningen, Netherlands; Paqell B.V., Reactorweg 301 3542 CE Utrecht, Netherlands
| | - Rieks de Rink
- Environmental Technology, Wageningen University & Research, P.O. Box 17 6700 AA, Wageningen, Netherlands; Paqell B.V., Reactorweg 301 3542 CE Utrecht, Netherlands
| | - Annemerel R Mol
- Environmental Technology, Wageningen University & Research, P.O. Box 17 6700 AA, Wageningen, Netherlands
| | - Karel J Keesman
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9 8911 CE Leeuwarden, Netherlands; Mathematical and Statistical Methods - Biometris, Wageningen University & Research, P.O. Box 16 6700 AA, Wageningen, Netherlands.
| | - Cees J N Buisman
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9 8911 CE Leeuwarden, Netherlands; Environmental Technology, Wageningen University & Research, P.O. Box 17 6700 AA, Wageningen, Netherlands
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2
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Ricci F, Greening C. Chemosynthesis: a neglected foundation of marine ecology and biogeochemistry. Trends Microbiol 2024; 32:631-639. [PMID: 38296716 DOI: 10.1016/j.tim.2023.11.013] [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: 07/26/2023] [Revised: 11/06/2023] [Accepted: 11/28/2023] [Indexed: 02/02/2024]
Abstract
Chemosynthesis is a metabolic process that transfers carbon to the biosphere using reduced compounds. It is well recognised that chemosynthesis occurs in much of the ocean, but it is often thought to be a negligible process compared to photosynthesis. Here we propose that chemosynthesis is the underlying process governing primary production in much of the ocean and suggest that it extends to a much wider range of compounds, microorganisms, and ecosystems than previously thought. In turn, this process has had a central role in controlling marine biogeochemistry, ecology, and carbon budgets across the vast realms of the ocean, from the dawn of life to contemporary times.
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Affiliation(s)
- Francesco Ricci
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Securing Antarctica's Environmental Future, Monash University, Clayton, VIC 3800, Australia.
| | - Chris Greening
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Securing Antarctica's Environmental Future, Monash University, Clayton, VIC 3800, Australia; Centre to Impact AMR, Monash University, Melbourne, Victoria, Australia.
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3
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Liu T, Zhang M, Hanson S, Juarez R, Wilson S, Schroeder H, Li Q, Zhu L, Zhang G, Blood AB. H 2S Increases Blood Pressure via Activation of L-Type Calcium Channels with Mediation by HS • Generated from Reactions with Oxyhemoglobin. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2305866. [PMID: 38685626 PMCID: PMC11234399 DOI: 10.1002/advs.202305866] [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: 08/19/2023] [Revised: 03/04/2024] [Indexed: 05/02/2024]
Abstract
Although the gasotransmitter hydrogen sulfide (H2S) is well known for its vasodilatory effects, H2S also exhibits vasoconstricting properties. Herein, it is demonstrated that administration of H2S as intravenous sodium sulfide (Na2S) increased blood pressure in sheep and rats, and this effect persisted after H2S has disappeared from the blood. Inhibition of the L-type calcium channel (LTCC) diminished the hypertensive effects. Incubation of Na2S with whole blood, red blood cells, methemoglobin, or oxyhemoglobin produced a hypertensive product of H2S, which is not hydrogen thioperoxide, metHb-SH- complexes, per-/poly- sulfides, or thiolsulfate, but rather a labile intermediate. One-electron oxidation of H2S by oxyhemoglobin generated its redox cousin, sulfhydryl radical (HS•). Consistent with the role of HS• as the hypertensive intermediate, scavenging HS• inhibited Na2S-induced vasoconstriction and activation of LTCCs. In conclusion, H2S causes vasoconstriction that is dependent on the activation of LTCCs and generation of HS• by oxyhemoglobin.
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Affiliation(s)
- Taiming Liu
- Division of NeonatologyDepartment of PediatricsLoma Linda University School of MedicineLoma LindaCA92354USA
| | - Meijuan Zhang
- Division of NeonatologyDepartment of PediatricsLoma Linda University School of MedicineLoma LindaCA92354USA
| | - Shawn Hanson
- Lawrence D. Longo Center for Perinatal BiologyLoma Linda University School of MedicineLoma LindaCA92354USA
| | - Rucha Juarez
- Lawrence D. Longo Center for Perinatal BiologyLoma Linda University School of MedicineLoma LindaCA92354USA
| | - Sean Wilson
- Lawrence D. Longo Center for Perinatal BiologyLoma Linda University School of MedicineLoma LindaCA92354USA
| | - Hobe Schroeder
- Lawrence D. Longo Center for Perinatal BiologyLoma Linda University School of MedicineLoma LindaCA92354USA
| | - Qian Li
- Department of MedicineGregory Fleming James Cystic Fibrosis Research CenterUniversity of Alabama at BirminghamBirminghamAL35294UK
| | - Lingchao Zhu
- Department of ChemistryUniversity of CaliforniaRiversideCA92521USA
| | - Guangyu Zhang
- Mass spectrometry core facilityLoma Linda UniversityLoma LindaCA92354USA
| | - Arlin B. Blood
- Division of NeonatologyDepartment of PediatricsLoma Linda University School of MedicineLoma LindaCA92354USA
- Lawrence D. Longo Center for Perinatal BiologyLoma Linda University School of MedicineLoma LindaCA92354USA
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4
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Cao H, Mao J, Tratnyek PG, Xu W. Role of Nitrogenous Functional Group Identity in Accelerating 1,2,3-Trichloropropane Degradation by Pyrogenic Carbonaceous Matter (PCM) and Sulfide Using PCM-like Polymers. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:10752-10763. [PMID: 38848107 PMCID: PMC11191598 DOI: 10.1021/acs.est.3c11010] [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: 12/27/2023] [Revised: 05/17/2024] [Accepted: 05/20/2024] [Indexed: 06/19/2024]
Abstract
Groundwater contamination by 1,2,3-trichloropropane (TCP) poses a unique challenge due to its human toxicity and recalcitrance to degradation. Previous work suggests that nitrogenous functional groups of pyrogenic carbonaceous matter (PCM), such as biochar, are important in accelerating contaminant dechlorination by sulfide. However, the reaction mechanism is unclear due, in part, to PCM's structural complexity. Herein, PCM-like polymers (PLPs) with controlled placement of nitrogenous functional groups [i.e., quaternary ammonium (QA), pyridine, and pyridinium cations (py+)] were employed as model systems to investigate PCM-enhanced TCP degradation by sulfide. Our results suggest that both PLP-QA and PLP-py+ were highly effective in facilitating TCP dechlorination by sulfide with half-lives of 16.91 ± 1.17 and 0.98 ± 0.15 days, respectively, and the reactivity increased with surface nitrogenous group density. A two-step process was proposed for TCP dechlorination, which is initiated by reductive ß-elimination, followed by nucleophilic substitution by surface-bound sulfur nucleophiles. The TCP degradation kinetics were not significantly affected by cocontaminants (i.e., 1,1,1-trichloroethane or trichloroethylene), but were slowed by natural organic matter. Our results show that PLPs containing certain nitrogen functional groups can facilitate the rapid and complete degradation of TCP by sulfide, suggesting that similarly functionalized PCM might form the basis for a novel process for the remediation of TCP-contaminated groundwater.
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Affiliation(s)
- Han Cao
- Department
of Civil and Environmental Engineering, Villanova University, Villanova, Pennsylvania 19085, United States
| | - Jingdong Mao
- Department
of Chemistry and Biochemistry, Old Dominion
University, Norfolk, Virginia 23529, United States
| | - Paul G. Tratnyek
- OHSU/PSU
School of Public Health, Oregon Health &
Science University, 3181 SW Sam Jackson Park Road, Portland, Oregon 97239, United States
| | - Wenqing Xu
- Department
of Civil and Environmental Engineering, Villanova University, Villanova, Pennsylvania 19085, United States
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5
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Soti A, Mohan Kulshreshtha N, Singh S, Samaria A, Brighu U, Dontireddy G, Banda S, Bhushan Gupta A. High rates of nitrogen removal in aerated VFCWs treating sewage through C-N-S cycle. BIORESOURCE TECHNOLOGY 2024; 399:130620. [PMID: 38518881 DOI: 10.1016/j.biortech.2024.130620] [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: 01/11/2024] [Revised: 03/18/2024] [Accepted: 03/19/2024] [Indexed: 03/24/2024]
Abstract
The efficiency of deep aerated vertical flow constructed wetlands (DA-VFCWs) being operated in Hyderabad, India, was evaluated herein using physicochemical analysis and 16S rRNA amplicon sequencing. The results showed 2-4-fold higher removal rate coefficients for Biochemical oxygen demand (1.32---3.53 m/d) and nitrogen (0.88--1.36 m/d) in DA-VFCWs than those of passive VFCWs. Elevated sulfate concentration in the DA-VFCWs effluent (84-113 mg/L) indicated possibility of sulfur-driven autotrophic denitrification (SDAD) as a major pathway operating in these wetlands besides the classical nitrogen removal pathways. The presence of nitrifiers (3.09-10.02 %), heterotrophic and aerobic denitrifiers (0.79-0.83 %), anammox bacteria (1.31-2.22 %) and SDAD bacteria (0.08-0.73 %) in the biofilm samples collected from the DA-VFCWs exemplify an interplay of Carbon-Nitrogen-Sulfur cycles in these systems. If proven, the presence of an operational SDAD pathway in DA-VFCWs can help reduce surface area requirement in VFCWs substantially besides alleviating biological clogging of the wetland substrate.
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Affiliation(s)
- Abhishek Soti
- Department of Civil Engineering, Malaviya National Institute of Technology, JLN Marg, Jaipur 302017, India; Bluedrop Enviro Private Limited, 101, Vasantha Golden Residency Plot No- 521 and 536, Phillu Street, Raja Rajeswari Nagar, Kondapur, Telangana 500084, India
| | - Niha Mohan Kulshreshtha
- Department of Civil Engineering, Malaviya National Institute of Technology, JLN Marg, Jaipur 302017, India
| | - Saurabh Singh
- Department of Civil Engineering, Malaviya National Institute of Technology, JLN Marg, Jaipur 302017, India; Department of Civil, Construction and Environmental Engineering, North Dakota State University, Fargo, ND 58105, USA; Department of Civil Engineering, Swami Keshvanand Institute of Technology, Management and Gramothan, Jaipur 302017, India
| | - Akshat Samaria
- Department of Civil Engineering, Malaviya National Institute of Technology, JLN Marg, Jaipur 302017, India
| | - Urmila Brighu
- Department of Civil Engineering, Malaviya National Institute of Technology, JLN Marg, Jaipur 302017, India
| | - Gangadhara Dontireddy
- Bluedrop Enviro Private Limited, 101, Vasantha Golden Residency Plot No- 521 and 536, Phillu Street, Raja Rajeswari Nagar, Kondapur, Telangana 500084, India
| | - Sravan Banda
- Bluedrop Enviro Private Limited, 101, Vasantha Golden Residency Plot No- 521 and 536, Phillu Street, Raja Rajeswari Nagar, Kondapur, Telangana 500084, India
| | - Akhilendra Bhushan Gupta
- Department of Civil Engineering, Malaviya National Institute of Technology, JLN Marg, Jaipur 302017, India.
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6
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Moore WS, Benitez-Nelson C, Schutte C, Moody A, Shiller A, Sibert RJ, Joye S. SGD-OD: investigating the potential oxygen demand of submarine groundwater discharge in coastal systems. Sci Rep 2024; 14:9249. [PMID: 38649393 PMCID: PMC11035578 DOI: 10.1038/s41598-024-59229-7] [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: 07/18/2023] [Accepted: 04/08/2024] [Indexed: 04/25/2024] Open
Abstract
Submarine groundwater discharge (SGD) supplies nutrients, carbon, metals, and radionuclide tracers to estuarine and coastal waters. One aspect of SGD that is poorly recognized is its direct effect on dissolved oxygen (DO) demand in receiving waters, denoted here as SGD-OD. Sulfate-mediated oxidation of organic matter in salty coastal aquifers produces numerous reduced byproducts including sulfide, ammonia, dissolved organic carbon and nitrogen, methane, and reduced metals. When these byproducts are introduced to estuarine and coastal systems by SGD and are oxidized, they may substantially reduce the DO concentration in receiving waters and impact organisms living there. We consider six estuarine and coastal sites where SGD derived fluxes of reduced byproducts are well documented. Using data from these sites we present a semiquantitative model to estimate the effect of these byproducts on DO in the receiving waters. Without continued aeration with atmospheric oxygen, the study sites would have experienced periodic hypoxic conditions due to SGD-OD. The presence of H2S supplied by SGD could also impact organisms. This process is likely prevalent in other systems worldwide.
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Affiliation(s)
- Willard S Moore
- School of the Earth, Ocean, & Environment, University of South Carolina, Columbia, SC, USA.
| | - Claudia Benitez-Nelson
- School of the Earth, Ocean, & Environment, University of South Carolina, Columbia, SC, USA
| | - Charles Schutte
- Department of Environmental Science, Rowan University, Glassboro, NJ, USA
| | - Amy Moody
- Division of Marine Science, Stennis Space Center, University of Southern Mississippi, Hattiesburg, MS, USA
| | - Alan Shiller
- Division of Marine Science, Stennis Space Center, University of Southern Mississippi, Hattiesburg, MS, USA
| | - Ryan J Sibert
- Department of Marine Sciences, University of Georgia, Athens, GA, USA
| | - Samantha Joye
- Department of Marine Sciences, University of Georgia, Athens, GA, USA
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7
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Halevy I, Fike DA, Pasquier V, Bryant RN, Wenk CB, Turchyn AV, Johnston DT, Claypool GE. Sedimentary parameters control the sulfur isotope composition of marine pyrite. Science 2023; 382:946-951. [PMID: 37995229 DOI: 10.1126/science.adh1215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 10/23/2023] [Indexed: 11/25/2023]
Abstract
Reconstructions of coupled carbon, oxygen, and sulfur cycles rely heavily on sedimentary pyrite sulfur isotope compositions (δ34Spyr). With a model of sediment diagenesis, paired with global datasets of sedimentary parameters, we show that the wide range of δ34Spyr (~100 per mil) in modern marine sediments arises from geographic patterns in the relative rates of diffusion, burial, and microbial reduction of sulfate. By contrast, the microbial sulfur isotope fractionation remains large and relatively uniform. Over Earth history, the effect of increasing seawater sulfate and oxygen concentrations on sulfate and sulfide transport and reaction may explain the corresponding increase observed in the δ34S offset between sulfate and pyrite. More subtle variations may be related to changes in depositional environments associated with sea level fluctuations and supercontinent cycles.
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Affiliation(s)
- I Halevy
- Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - D A Fike
- Earth and Planetary Sciences, Washington University in St. Louis, St. Louis, MO 63130-4899, USA
| | - V Pasquier
- Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - R N Bryant
- Earth and Planetary Sciences, Washington University in St. Louis, St. Louis, MO 63130-4899, USA
- Earth, Atmospheric and Planetary Sciences, Purdue University, W. Lafayette, IN 47907, USA
| | - C B Wenk
- Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - A V Turchyn
- Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, UK
| | - D T Johnston
- Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, USA
| | - G E Claypool
- 8910 West Jewell Avenue, Unit 209, Lakewood, CO 80232, USA
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8
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Sergienko N, Lumbaque EC, Radjenovic J. (Electro)catalytic oxidation of sulfide and recovery of elemental sulfur from sulfide-laden streams. WATER RESEARCH 2023; 245:120651. [PMID: 37738939 DOI: 10.1016/j.watres.2023.120651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 09/16/2023] [Accepted: 09/18/2023] [Indexed: 09/24/2023]
Abstract
MnxOy coated over TiO2 nanotube array substrate was doped with Mo and polyaniline (PANI) and applied for electrochemical desulfurization of concentrated sulfide (HS-) solutions at basic pH, typical of biogas scrubbing solutions and industrial wastewater. Mo and PANI co-dopants significantly enhanced the anode activity towards sulfide oxidation and ensured its complete stability even in highly corrosive sulfide solutions (e.g., 200 mM HS-). This was due to the increased electrochemically active surface area, improved coating conductivity and reduced charge transfer resistance. The (electro)catalytic oxidation of HS- demonstrated robust performance with very limited impact of different operational parameters (e.g., dissolved oxygen, anode potential, HS- concentration). Due to the formation of elemental sulfur (S0) layer at the anode surface at basic pH, longer term anode usage requires its periodic removal. Chemical dissolution of S0 with toluene allows its rapid removal without affecting the anode activity, and easy recrystallization and recovery of pure sulfur.
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Affiliation(s)
- Natalia Sergienko
- Catalan Institute for Water Research (ICRA-CERCA), c/Emili Grahit 101, Girona 17003, Spain; University of Girona, Girona, Spain
| | - Elizabeth Cuervo Lumbaque
- Catalan Institute for Water Research (ICRA-CERCA), c/Emili Grahit 101, Girona 17003, Spain; University of Girona, Girona, Spain
| | - Jelena Radjenovic
- Catalan Institute for Water Research (ICRA-CERCA), c/Emili Grahit 101, Girona 17003, Spain; Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluís Companys 23, Barcelona 08010, Spain.
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9
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Cosmidis J. Will tomorrow's mineral materials be grown? Microb Biotechnol 2023; 16:1713-1722. [PMID: 37522764 PMCID: PMC10443349 DOI: 10.1111/1751-7915.14298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/31/2023] [Accepted: 06/06/2023] [Indexed: 08/01/2023] Open
Abstract
Biomineralization, the capacity to form minerals, has evolved in a great diversity of bacterial lineages as an adaptation to different environmental conditions and biological functions. Microbial biominerals often display original properties (morphology, composition, structure, association with organics) that significantly differ from those of abiotically formed counterparts, altogether defining the 'mineral phenotype'. In principle, it should be possible to take advantage of microbial biomineralization processes to design and biomanufacture advanced mineral materials for a range of technological applications. In practice, this has rarely been done so far and only for a very limited number of biomineral types. This is mainly due to our poor understanding of the underlying molecular mechanisms controlling microbial biomineralization pathways, preventing us from developing bioengineering strategies aiming at improving biomineral properties for different applications. Another important challenge is the difficulty to upscale microbial biomineralization from the lab to industrial production. Addressing these challenges will require combining expertise from environmental microbiologists and geomicrobiologists, who have historically been working at the forefront of research on microbe-mineral interactions, alongside bioengineers and material scientists. Such interdisciplinary efforts may in the future allow the emergence of a mineral biomanufacturing industry, a critical tool towards the development more sustainable and circular bioeconomies.
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Affiliation(s)
- Julie Cosmidis
- Department of Earth SciencesUniversity of OxfordOxfordUK
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10
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Watson SJ, Arisdakessian C, Petelo M, Keliipuleole K, Tachera DK, Okuhata BK, Dulai H, Frank KL. Geology and land use shape nitrogen and sulfur cycling groundwater microbial communities in Pacific Island aquifers. ISME COMMUNICATIONS 2023; 3:58. [PMID: 37286627 PMCID: PMC10247779 DOI: 10.1038/s43705-023-00261-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 04/18/2023] [Accepted: 05/24/2023] [Indexed: 06/09/2023]
Abstract
Resource-constrained island populations have thrived in Hawai'i for over a millennium, but now face aggressive new challenges to fundamental resources, including the security and sustainability of water resources. Characterizing the microbial community in groundwater ecosystems is a powerful approach to infer changes from human impacts due to land management in hydrogeological complex aquifers. In this study, we investigate how geology and land management influence geochemistry, microbial diversity and metabolic functions. We sampled a total of 19 wells over 2-years across the Hualālai watershed of Kona, Hawai'i analyzing geochemistry, and microbial communities by 16S rRNA amplicon sequencing. Geochemical analysis revealed significantly higher sulfate along the northwest volcanic rift zone, and high nitrogen (N) correlated with high on-site sewage disposal systems (OSDS) density. A total of 12,973 Amplicon Sequence Variants (ASV) were identified in 220 samples, including 865 ASVs classified as putative N and sulfur (S) cyclers. The N and S cyclers were dominated by a putative S-oxidizer coupled to complete denitrification (Acinetobacter), significantly enriched up to 4-times comparatively amongst samples grouped by geochemistry. The significant presence of Acinetobacter infers the bioremediation potential of volcanic groundwater for microbial-driven coupled S-oxidation and denitrification providing an ecosystem service for island populations dependent upon groundwater aquifers.
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Affiliation(s)
- Sheree J Watson
- University of Hawai'i at Mānoa, Pacific Biosciences Research Center, Honolulu, HI, USA
| | - Cédric Arisdakessian
- University of Hawai'i at Mānoa, Pacific Biosciences Research Center, Honolulu, HI, USA
- University of Hawai'i at Mānoa, Department of Information and Computer Sciences, Honolulu, HI, USA
| | - Maria Petelo
- University of Hawai'i at Mānoa, Pacific Biosciences Research Center, Honolulu, HI, USA
| | - Kekuʻiapōiula Keliipuleole
- University of Hawai'i at Mānoa, Pacific Biosciences Research Center, Honolulu, HI, USA
- University of Hawai'i at Mānoa, Marine Biology Graduate Program, Honolulu, HI, USA
| | - Diamond K Tachera
- University of Hawai'i at Mānoa, Department of Earth Sciences, Honolulu, HI, USA
| | - Brytne K Okuhata
- University of Hawai'i at Mānoa, Department of Earth Sciences, Honolulu, HI, USA
| | - Henrietta Dulai
- University of Hawai'i at Mānoa, Department of Earth Sciences, Honolulu, HI, USA
| | - Kiana L Frank
- University of Hawai'i at Mānoa, Pacific Biosciences Research Center, Honolulu, HI, USA.
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11
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Nosalova L, Piknova M, Kolesarova M, Pristas P. Cold Sulfur Springs-Neglected Niche for Autotrophic Sulfur-Oxidizing Bacteria. Microorganisms 2023; 11:1436. [PMID: 37374938 DOI: 10.3390/microorganisms11061436] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/15/2023] [Accepted: 05/25/2023] [Indexed: 06/29/2023] Open
Abstract
Since the beginning of unicellular life, dissimilation reactions of autotrophic sulfur bacteria have been a crucial part of the biogeochemical sulfur cycle on Earth. A wide range of sulfur oxidation states is reflected in the diversity of metabolic pathways used by sulfur-oxidizing bacteria. This metabolically and phylogenetically diverse group of microorganisms inhabits a variety of environments, including extreme environments. Although they have been of interest to microbiologists for more than 150 years, meso- and psychrophilic chemolithoautotrophic sulfur-oxidizing microbiota are less studied compared to the microbiota of hot springs. Several recent studies suggested that cold sulfur waters harbor unique, yet not described, bacterial taxa.
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Affiliation(s)
- Lea Nosalova
- Department of Microbiology, Faculty of Science, Institute of Biology and Ecology, Pavol Jozef Safarik University in Kosice, 041 54 Kosice, Slovakia
| | - Maria Piknova
- Department of Microbiology, Faculty of Science, Institute of Biology and Ecology, Pavol Jozef Safarik University in Kosice, 041 54 Kosice, Slovakia
| | - Mariana Kolesarova
- Department of Microbiology, Faculty of Science, Institute of Biology and Ecology, Pavol Jozef Safarik University in Kosice, 041 54 Kosice, Slovakia
| | - Peter Pristas
- Centre of Biosciences, Institute of Animal Physiology, Slovak Academy of Sciences, 040 01 Kosice, Slovakia
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12
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Fan K, Wang W, Xu X, Yuan Y, Ren N, Lee DJ, Chen C. Recent Advances in Biotechnologies for the Treatment of Environmental Pollutants Based on Reactive Sulfur Species. Antioxidants (Basel) 2023; 12:antiox12030767. [PMID: 36979016 PMCID: PMC10044940 DOI: 10.3390/antiox12030767] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/19/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
The definition of reactive sulfur species (RSS) is inspired by the reactivity and variable chemical valence of sulfur. Sulfur is an essential element for life and is a part of global geochemical cycles. Wastewater treatment bioreactors can be divided into two major categories: sulfur reduction and sulfur oxidation. We review the origins of the definition of RSS and related biotechnological processes in environmental management. Sulfate reduction, sulfide oxidation, and sulfur-based redox reactions are key to driving the coupled global carbon, nitrogen, and sulfur co-cycles. This shows the coupling of the sulfur cycle with the carbon and nitrogen cycles and provides insights into the global material-chemical cycle. We also review the biological classification and RSS metabolic mechanisms of functional microorganisms involved in the biological processes, such as sulfate-reducing and sulfur-oxidizing bacteria. Developments in molecular biology and genomic technologies have allowed us to obtain detailed information on these bacteria. The importance of RSS in environmental technologies requires further consideration.
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Affiliation(s)
- Kaili Fan
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Wei Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xijun Xu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yuan Yuan
- College of Biological Engineering, Beijing Polytechnic, Beijing 100176, China
| | - Nanqi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Chuan Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
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Wang X, Shu Z, He H, Zhou M, Lu X, Wang J, Zhang L, Pan Z, Wang Z. Arsenopyrite dissolution in circumneutral oxic environments: The effect of pyrophosphate and dissolved Mn(III). WATER RESEARCH 2023; 230:119595. [PMID: 36642031 DOI: 10.1016/j.watres.2023.119595] [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: 09/20/2022] [Revised: 12/07/2022] [Accepted: 01/06/2023] [Indexed: 06/17/2023]
Abstract
The oxidative dissolution of As from arsenopyrite, one important arsenic mineral in reducing conditions, poses an environmental hazard to natural aquatic systems. The dissolution of arsenopyrite occurs slowly due to the surface precipitates of iron oxides in circumneutral oxic environments. However, the presence of natural ligands and coexisting metals may change the release of Fe species, which would be of critical importance to the dissolution of arsenopyrite. Here, we investigated the oxidative dissolution of arsenopyrite induced by pyrophosphate (PP) and dissolved Mn(III) species as a natural occurring Mn species with strong complexation affinity to PP. With the presence of PP, the formation of Fe(II)-PP complexes and its rapid oxidation to dissolved Fe(III)-PP species resulted in a substantial increase in the generation of hydroxyl radicals (•OH) under ambient dark conditions, contributing to faster dissolution of arsenopyrite and higher percentage of As(V) in the dissolved products. Dissolved Mn(III), though considered as an extra oxidant besides oxygen, unexpectedly acted as a radical scavenger for •OH and inhibited the production of As(V). Moreover, the oxidation of sulfur species differed in the two systems as significant formation of thiosulfate was observed with the presence of PP, which did not occur in the system with dissolved Mn(III). Overall, the effects of dissolved Mn(III) and PP on the dissolution of arsenopyrite and the subsequent transformation of Fe, As and S species have important implications for disentangling the interactions among these metastable elements, and for assessing their transport and environmental impacts in aquatic systems.
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Affiliation(s)
- Xingxing Wang
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China
| | - Zhipeng Shu
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China
| | - Haohua He
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China
| | - Ming Zhou
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China
| | - Xiaohan Lu
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China
| | - Jiajia Wang
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China
| | - Liwu Zhang
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China
| | - Zezhen Pan
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China; National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Shanghai, China.
| | - Zimeng Wang
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China; National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Shanghai, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
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14
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Nguyen PM, Arslan M, Kappelmeyer U, Mäusezahl I, Wiessner A, Müller JA. Spatial characterization of microbial sulfur cycling in horizontal-flow constructed wetland models. CHEMOSPHERE 2022; 309:136605. [PMID: 36179921 DOI: 10.1016/j.chemosphere.2022.136605] [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: 07/11/2022] [Revised: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
Constructed wetlands (CWs) are a cost-effective technology for wastewater treatment in which plant-microorganism relationships play a key role in transforming pollutants. However, there is little knowledge about the spatial organization of microbial metabolic processes in CWs. Here we show the structuring of microbial transformation of inorganic sulfur compounds (ISCs) in two horizontal subsurface-flow CW models fed with sulfate-rich artificial wastewater. One model was fully planted with Juncus effusus, while the other was planted only in the middle to investigate further the influence of the plant on ISC transformations. Chemical analyses revealed that sulfate reduction and re-oxidation of sulfide/sulfur occurred simultaneously along the flow paths, with net reduction at the beginning of the CWs, where organic carbon from the influent was still present, and predominant re-oxidation in the downstream sections. Porewater ISC concentrations hardly differed between the two CWs. However, analysis of the bacterial communities showed that sulfur cycling in the fully planted CW was much higher. Total bacterial abundances were about 50 times and 3-4 orders of magnitude higher in the rhizoplane than in porewater and on gravel, respectively, as quantified by qPCR determination of the 16S rRNA gene. Sequencing of 16S rRNA gene amplicons revealed that bacterial communities on the roots and in the porewater differed substantially, apparently a consequence of the fluxes of oxygen and exudates from the roots. Furthermore, we observed partitioning of ISC transforming bacteria into different niches of the CWs. The results of the chemical and microbial analyses collectively support that extensive sulfur cycling occurred in the rhizospheres of the CW models. The study is relevant to the treatment of sulfur-containing wastewater and the elucidation of microbial communities involved in biogeochemical activities to improve water quality.
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Affiliation(s)
- Phuong Minh Nguyen
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany; Department of Environmental Technology, Faculty of Environmental Sciences, University of Science, Vietnam National University, Hanoi, Viet Nam
| | - Muhammad Arslan
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany; Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada
| | - Uwe Kappelmeyer
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Ines Mäusezahl
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Arndt Wiessner
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Jochen A Müller
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany; Institute for Biological Interfaces (IBG 5), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany.
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15
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Seidel L, Broman E, Ståhle M, Nilsson E, Turner S, Hendrycks W, Sachpazidou V, Forsman A, Hylander S, Dopson M. Long-Term Warming of Baltic Sea Coastal Waters Affects Bacterial Communities in Bottom Water and Sediments Differently. Front Microbiol 2022; 13:873281. [PMID: 35755995 PMCID: PMC9226639 DOI: 10.3389/fmicb.2022.873281] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 04/27/2022] [Indexed: 11/13/2022] Open
Abstract
Coastal marine ecosystems are some of the most diverse natural habitats while being highly vulnerable in the face of climate change. The combination of anthropogenic influence from land and ongoing climate change will likely have severe effects on the environment, but the precise response remains uncertain. This study compared an unaffected "control" Baltic Sea bay to a "heated" bay that has undergone artificial warming from cooling water release from a nuclear power plant for ~50 years. This heated the water in a similar degree to IPCC SSP5-8.5 predictions by 2100 as natural systems to study temperature-related climate change effects. Bottom water and surface sediment bacterial communities and their biogeochemical processes were investigated to test how future coastal water warming alters microbial communities; shifts seasonal patterns, such as increased algae blooming; and influences nutrient and energy cycling, including elevated respiration rates. 16S rRNA gene amplicon sequencing and geochemical parameters demonstrated that heated bay bottom water bacterial communities were influenced by increased average temperatures across changing seasons, resulting in an overall Shannon's H diversity loss and shifts in relative abundances. In contrast, Shannon's diversity increased in the heated surface sediments. The results also suggested a trend toward smaller-sized microorganisms within the heated bay bottom waters, with a 30% increased relative abundance of small size picocyanobacteria in the summer (June). Furthermore, bacterial communities in the heated bay surface sediment displayed little seasonal variability but did show potential changes of long-term increased average temperature in the interplay with related effects on bottom waters. Finally, heated bay metabolic gene predictions from the 16S rRNA gene sequences suggested raised anaerobic processes closer to the sediment-water interface. In conclusion, climate change will likely alter microbial seasonality and diversity, leading to prolonged and increased algae blooming and elevated respiration rates within coastal waters.
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Affiliation(s)
- Laura Seidel
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
| | - Elias Broman
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
- Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden
| | - Magnus Ståhle
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
| | - Emelie Nilsson
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
| | - Stephanie Turner
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
| | - Wouter Hendrycks
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
| | - Varvara Sachpazidou
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
| | - Anders Forsman
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
| | - Samuel Hylander
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
| | - Mark Dopson
- Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden
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16
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Pierce CE, Furman OS, Nicholas SL, Wasik JC, Gionfriddo CM, Wymore AM, Sebestyen SD, Kolka RK, Mitchell CPJ, Griffiths NA, Elias DA, Nater EA, Toner BM. Role of Ester Sulfate and Organic Disulfide in Mercury Methylation in Peatland Soils. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:1433-1444. [PMID: 34979084 DOI: 10.1021/acs.est.1c04662] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We examined the composition and spatial correlation of sulfur and mercury pools in peatland soil profiles by measuring sulfur speciation by 1s X-ray absorption near-edge structure spectrocopy and mercury concentrations by cold vapor atomic fluorescence spectroscopy. Also investigated were the methylation/demethylation rate constants and the presence of hgcAB genes with depth. Methylmercury (MeHg) concentration and organic disulfide were spatially correlated and had a significant positive correlation (p < 0.05). This finding is consistent with these species being products of dissimilatory sulfate reduction. Conversely, a significant negative correlation between organic monosulfides and MeHg was observed, which is consistent with a reduction in Hg(II) bioavailability via complexation reactions. Finally, a significant positive correlation between ester sulfate and instantaneous methylation rate constants was observed, which is consistent with ester sulfate being a substrate for mercury methylation via dissimilatory sulfate reduction. Our findings point to the importance of organic sulfur species in mercury methylation processes, as substrates and products, as well as potential inhibitors of Hg(II) bioavailability. For a peatland system with sub-μmol L-1 porewater concentrations of sulfate and hydrogen sulfide, our findings indicate that the solid-phase sulfur pools, which have a much larger sulfur concentration range, may be accessible to microbial activity or exchanging with the porewater.
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Affiliation(s)
- Caroline E Pierce
- Department of Soil, Water, and Climate, University of Minnesota, St. Paul, Minnesota 55108, United States
| | - Olha S Furman
- Department of Soil, Water, and Climate, University of Minnesota, St. Paul, Minnesota 55108, United States
| | - Sarah L Nicholas
- Department of Soil, Water, and Climate, University of Minnesota, St. Paul, Minnesota 55108, United States
| | - Jill Coleman Wasik
- Plant and Earth Science Department, University of Wisconsin River Falls, River Falls, Wisconsin 54022, United States
| | - Caitlin M Gionfriddo
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Ann M Wymore
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Stephen D Sebestyen
- USDA Forest Service, Northern Research Station, Grand Rapids, Minnesota 55744, United States
| | - Randall K Kolka
- USDA Forest Service, Northern Research Station, Grand Rapids, Minnesota 55744, United States
| | - Carl P J Mitchell
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, Scarborough, Ontario M1C 1A4, Canada
| | - Natalie A Griffiths
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Dwayne A Elias
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Edward A Nater
- Department of Soil, Water, and Climate, University of Minnesota, St. Paul, Minnesota 55108, United States
| | - Brandy M Toner
- Department of Soil, Water, and Climate, University of Minnesota, St. Paul, Minnesota 55108, United States
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17
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Does Addition of Phosphate and Ammonium Nutrients Affect Microbial Activity in Froth Treatment Affected Tailings? Microorganisms 2021; 9:microorganisms9112224. [PMID: 34835351 PMCID: PMC8620261 DOI: 10.3390/microorganisms9112224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/20/2021] [Accepted: 10/22/2021] [Indexed: 11/16/2022] Open
Abstract
We examined greenhouse gas (GHG) production upon the addition of ammonium and phosphate to mature fine tailing (MFT) samples from Alberta's Pond 2/3 (at 5 and 15 m) and Pond 7 (12.5 m) in microcosm studies. The methane production rate in unamended Pond 2/3 MFT correlated with sample age; the production rate was higher in the less dense, more recently discharged MFT samples and lower in the denser, deeper sample. Adding small amounts of naphtha increased methane production, but there was no correlation with increasing naphtha, indicating that naphtha may partition into bitumen, reducing its bioavailability. Although non-detectable phosphate and low ammonium in the pore water indicate that these nutrients were potentially limiting microbial activity, their addition did not significantly affect methanogenesis but somewhat enhanced sulphate and nitrate reduction. Neither ammonium nor phosphate were detected in the pore water when added at low concentrations, but when added at high concentrations, 25-35% phosphate and 30-45% ammonium were lost. These ions likely sorbed to MFT minerals such as kaolinite, which have microbial activity governed by phosphate/ammonium desorption. Hence, multiple limitations affected microbial activity. Sulphate was less effective than nitrate was in inhibiting methanogenesis because H2S may be a less effective inhibitor than NOx- intermediates are, and/or H2S may be more easily abiotically removed. With nitrate reduction, N2O, a potent GHG was produced but eventually metabolized.
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18
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Cestellos-Blanco S, Kim JM, Watanabe NG, Chan RR, Yang P. Molecular insights and future frontiers in cell photosensitization for solar-driven CO 2 conversion. iScience 2021; 24:102952. [PMID: 34458701 PMCID: PMC8379512 DOI: 10.1016/j.isci.2021.102952] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The conversion of CO2 to value-added products powered with solar energy is an ideal solution to establishing a closed carbon cycle. Combining microorganisms with light-harvesting nanomaterials into photosynthetic biohybrid systems (PBSs) presents an approach to reaching this solution. Metabolic pathways precisely evolved for CO2 fixation selectively and reliably generate products. Nanomaterials harvest solar light and biocompatibly associate with microorganisms owing to similar lengths scales. Although this is a nascent field, a variety of approaches have been implemented encompassing different microorganisms and nanomaterials. To advance the field in an impactful manner, it is paramount to understand the molecular underpinnings of PBSs. In this perspective, we highlight studies inspecting charge uptake pathways and singularities in photosensitized cells. We discuss further analyses to more completely elucidate these constructs, and we focus on criteria to be met for designing photosensitizing nanomaterials. As a result, we advocate for the pairing of microorganisms with naturally occurring and highly biocompatible mineral-based semiconductor nanomaterials.
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Affiliation(s)
| | - Ji Min Kim
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | | | | | - Peidong Yang
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
- Department of Chemistry, University of California, Berkeley, CA, USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
- Kavli Energy NanoScience Institute at the University of California, Berkeley, CA, USA
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19
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Zhu J, Ligi S, Yang G. An evolutionary perspective on the interplays between hydrogen sulfide and oxygen in cellular functions. Arch Biochem Biophys 2021; 707:108920. [PMID: 34019852 DOI: 10.1016/j.abb.2021.108920] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/09/2021] [Accepted: 05/11/2021] [Indexed: 02/06/2023]
Abstract
The physiological effects of the endogenously generated hydrogen sulfide (H2S) have been extensively studied in recent years. This review summarized the role of H2S in the origin of life and H2S metabolism in organisms from bacteria to vertebrates, examined the relationship between H2S and oxygen from an evolutionary perspective and emphasized the oxygen-dependent manner of H2S signaling in various physiological and pathological processes. H2S and oxygen are inextricably linked in various cellular functions. H2S is involved in aerobic respiration and stimulates oxidative phosphorylation and ATP production within the cell. Besides, H2S has protective effects on ischemia and reperfusion injury in several organs by acting as an oxygen sensor. Also, emerging evidence suggests the role of H2S is in an oxygen-dependent manner. All these findings indicate the subtle relationship between H2S and oxygen and further explain why H2S, a toxic molecule thriving in an anoxia environment several billion years ago, still affects homeostasis today despite the very low content in the body.
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Affiliation(s)
- Jiechun Zhu
- Department of Biology, Laurentian University, Sudbury, Canada; Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Canada
| | - Samantha Ligi
- Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Canada; Department of Chemistry and Biochemistry, Laurentian University, Sudbury, Canada
| | - Guangdong Yang
- Department of Biology, Laurentian University, Sudbury, Canada; Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Canada; Department of Chemistry and Biochemistry, Laurentian University, Sudbury, Canada.
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20
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Cron B, Macalady JL, Cosmidis J. Organic Stabilization of Extracellular Elemental Sulfur in a Sulfurovum-Rich Biofilm: A New Role for Extracellular Polymeric Substances? Front Microbiol 2021; 12:720101. [PMID: 34421879 PMCID: PMC8377587 DOI: 10.3389/fmicb.2021.720101] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 07/15/2021] [Indexed: 11/13/2022] Open
Abstract
This work shines light on the role of extracellular polymeric substance (EPS) in the formation and preservation of elemental sulfur biominerals produced by sulfur-oxidizing bacteria. We characterized elemental sulfur particles produced within a Sulfurovum-rich biofilm in the Frasassi Cave System (Italy). The particles adopt spherical and bipyramidal morphologies, and display both stable (α-S8) and metastable (β-S8) crystal structures. Elemental sulfur is embedded within a dense matrix of EPS, and the particles are surrounded by organic envelopes rich in amide and carboxylic groups. Organic encapsulation and the presence of metastable crystal structures are consistent with elemental sulfur organomineralization, i.e., the formation and stabilization of elemental sulfur in the presence of organics, a mechanism that has previously been observed in laboratory studies. This research provides new evidence for the important role of microbial EPS in mineral formation in the environment. We hypothesize that the extracellular organics are used by sulfur-oxidizing bacteria for the stabilization of elemental sulfur minerals outside of the cell wall as a store of chemical energy. The stabilization of energy sources (in the form of a solid electron acceptor) in biofilms is a potential new role for microbial EPS that requires further investigation.
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Affiliation(s)
- Brandi Cron
- Salish Sea Research Center, Northwest Indian College, Bellingham, WA, United States
- Department of Geosciences, The Pennsylvania State University, University Park, PA, United States
| | - Jennifer L. Macalady
- Department of Geosciences, The Pennsylvania State University, University Park, PA, United States
| | - Julie Cosmidis
- Department of Geosciences, The Pennsylvania State University, University Park, PA, United States
- Department of Earth Sciences, University of Oxford, Oxford, United Kingdom
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21
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Patin NV, Dietrich ZA, Stancil A, Quinan M, Beckler JS, Hall ER, Culter J, Smith CG, Taillefert M, Stewart FJ. Gulf of Mexico blue hole harbors high levels of novel microbial lineages. THE ISME JOURNAL 2021; 15:2206-2232. [PMID: 33612832 PMCID: PMC8319197 DOI: 10.1038/s41396-021-00917-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 01/14/2021] [Accepted: 01/27/2021] [Indexed: 01/31/2023]
Abstract
Exploration of oxygen-depleted marine environments has consistently revealed novel microbial taxa and metabolic capabilities that expand our understanding of microbial evolution and ecology. Marine blue holes are shallow karst formations characterized by low oxygen and high organic matter content. They are logistically challenging to sample, and thus our understanding of their biogeochemistry and microbial ecology is limited. We present a metagenomic and geochemical characterization of Amberjack Hole on the Florida continental shelf (Gulf of Mexico). Dissolved oxygen became depleted at the hole's rim (32 m water depth), remained low but detectable in an intermediate hypoxic zone (40-75 m), and then increased to a secondary peak before falling below detection in the bottom layer (80-110 m), concomitant with increases in nutrients, dissolved iron, and a series of sequentially more reduced sulfur species. Microbial communities in the bottom layer contained heretofore undocumented levels of the recently discovered phylum Woesearchaeota (up to 58% of the community), along with lineages in the bacterial Candidate Phyla Radiation (CPR). Thirty-one high-quality metagenome-assembled genomes (MAGs) showed extensive biochemical capabilities for sulfur and nitrogen cycling, as well as for resisting and respiring arsenic. One uncharacterized gene associated with a CPR lineage differentiated hypoxic from anoxic zone communities. Overall, microbial communities and geochemical profiles were stable across two sampling dates in the spring and fall of 2019. The blue hole habitat is a natural marine laboratory that provides opportunities for sampling taxa with under-characterized but potentially important roles in redox-stratified microbial processes.
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Affiliation(s)
- N V Patin
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA.
- Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, GA, USA.
- Ocean Chemistry and Ecosystems Division, Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration, Miami, FL, USA.
- Cooperative Institute for Marine and Atmospheric Studies, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, USA.
- Stationed at Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, La Jolla, CA, USA.
| | | | - A Stancil
- Harbor Branch Oceanographic Institute, Florida Atlantic University, Ft. Pierce, FL, USA
| | - M Quinan
- Harbor Branch Oceanographic Institute, Florida Atlantic University, Ft. Pierce, FL, USA
| | - J S Beckler
- Harbor Branch Oceanographic Institute, Florida Atlantic University, Ft. Pierce, FL, USA
| | - E R Hall
- Mote Marine Laboratory, Sarasota, FL, USA
| | - J Culter
- Mote Marine Laboratory, Sarasota, FL, USA
| | - C G Smith
- U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL, USA
| | - M Taillefert
- School of Earth & Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - F J Stewart
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
- Center for Microbial Dynamics and Infection, Georgia Institute of Technology, Atlanta, GA, USA
- Department of Microbiology & Immunology, Montana State University, Bozeman, MT, USA
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22
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Miyazaki Y, Marutani E, Ikeda T, Ni X, Hanaoka K, Xian M, Ichinose F. A Sulfonyl Azide-Based Sulfide Scavenger Rescues Mice from Lethal Hydrogen Sulfide Intoxication. Toxicol Sci 2021; 183:393-403. [PMID: 34270781 DOI: 10.1093/toxsci/kfab088] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Exposure to hydrogen sulfide (H2S) can cause neurotoxicity and cardiopulmonary arrest. Resuscitating victims of sulfide intoxication is extremely difficult, and survivors often exhibit persistent neurological deficits. However, no specific antidote is available for sulfide intoxication. The objective of this study was to examine whether administration of a sulfonyl azide-based sulfide-specific scavenger, SS20, would rescue mice in models of H2S intoxication: ongoing exposure and post-cardiopulmonary arrest. In the ongoing exposure model, SS20 (1,250 µmol/kg) or vehicle was administered to awake CD-1 mice intraperitoneally at 10 minutes after breathing 790 ppm of H2S followed by another 30 minutes of H2S inhalation. Effects of SS20 on survival was assessed. In the post-cardiopulmonary arrest model, cardiopulmonary arrest was induced by an intraperitoneal administration of sodium sulfide nonahydrate (125 mg/kg) in anesthetized mice. After 1 minute of cardiopulmonary arrest, mice were resuscitated with intravenous administration of SS20 (250 µmol/kg) or vehicle. Effects of SS20 on survival, neurological outcomes, and plasma H2S levels were evaluated. Administration of SS20 during ongoing H2S inhalation improved 24-hour survival (6/6 [100%] in SS20 versus 1/6 [17%] in vehicle; P = 0.0043). Post-arrest administration of SS20 improved 7-day survival (4/10 [40%] in SS20 versus 0/10 [0%] in vehicle; P = 0.0038) and neurological outcomes after resuscitation. SS20 decreased plasma H2S levels to pre-arrest baseline immediately after reperfusion and shortened the time to return of spontaneous circulation and respiration. The current results suggest that SS20 is an effective antidote against lethal H2S intoxication, even when administered after cardiopulmonary arrest.
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Affiliation(s)
- Yusuke Miyazaki
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA
| | - Eizo Marutani
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA
| | - Takamitsu Ikeda
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA
| | - Xiang Ni
- Department of Chemistry, Brown University, Providence, RI
| | - Kenjiro Hanaoka
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan
| | - Ming Xian
- Department of Chemistry, Brown University, Providence, RI
| | - Fumito Ichinose
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA
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23
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Paredes GF, Viehboeck T, Lee R, Palatinszky M, Mausz MA, Reipert S, Schintlmeister A, Maier A, Volland JM, Hirschfeld C, Wagner M, Berry D, Markert S, Bulgheresi S, König L. Anaerobic Sulfur Oxidation Underlies Adaptation of a Chemosynthetic Symbiont to Oxic-Anoxic Interfaces. mSystems 2021; 6:e0118620. [PMID: 34058098 PMCID: PMC8269255 DOI: 10.1128/msystems.01186-20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 04/20/2021] [Indexed: 11/23/2022] Open
Abstract
Chemosynthetic symbioses occur worldwide in marine habitats, but comprehensive physiological studies of chemoautotrophic bacteria thriving on animals are scarce. Stilbonematinae are coated by thiotrophic Gammaproteobacteria. As these nematodes migrate through the redox zone, their ectosymbionts experience varying oxygen concentrations. However, nothing is known about how these variations affect their physiology. Here, by applying omics, Raman microspectroscopy, and stable isotope labeling, we investigated the effect of oxygen on "Candidatus Thiosymbion oneisti." Unexpectedly, sulfur oxidation genes were upregulated in anoxic relative to oxic conditions, but carbon fixation genes and incorporation of 13C-labeled bicarbonate were not. Instead, several genes involved in carbon fixation were upregulated under oxic conditions, together with genes involved in organic carbon assimilation, polyhydroxyalkanoate (PHA) biosynthesis, nitrogen fixation, and urea utilization. Furthermore, in the presence of oxygen, stress-related genes were upregulated together with vitamin biosynthesis genes likely necessary to withstand oxidative stress, and the symbiont appeared to proliferate less. Based on its physiological response to oxygen, we propose that "Ca. T. oneisti" may exploit anaerobic sulfur oxidation coupled to denitrification to proliferate in anoxic sand. However, the ectosymbiont would still profit from the oxygen available in superficial sand, as the energy-efficient aerobic respiration would facilitate carbon and nitrogen assimilation. IMPORTANCE Chemoautotrophic endosymbionts are famous for exploiting sulfur oxidization to feed marine organisms with fixed carbon. However, the physiology of thiotrophic bacteria thriving on the surface of animals (ectosymbionts) is less understood. One longstanding hypothesis posits that attachment to animals that migrate between reduced and oxic environments would boost sulfur oxidation, as the ectosymbionts would alternatively access sulfide and oxygen, the most favorable electron acceptor. Here, we investigated the effect of oxygen on the physiology of "Candidatus Thiosymbion oneisti," a gammaproteobacterium which lives attached to marine nematodes inhabiting shallow-water sand. Surprisingly, sulfur oxidation genes were upregulated under anoxic relative to oxic conditions. Furthermore, under anoxia, the ectosymbiont appeared to be less stressed and to proliferate more. We propose that animal-mediated access to oxygen, rather than enhancing sulfur oxidation, would facilitate assimilation of carbon and nitrogen by the ectosymbiont.
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Affiliation(s)
- Gabriela F. Paredes
- University of Vienna, Department of Functional and Evolutionary Ecology, Environmental Cell Biology Group, Vienna, Austria
| | - Tobias Viehboeck
- University of Vienna, Department of Functional and Evolutionary Ecology, Environmental Cell Biology Group, Vienna, Austria
- University of Vienna, Center for Microbiology and Environmental Systems Science, Division of Microbial Ecology, Vienna, Austria
| | - Raymond Lee
- Washington State University, School of Biological Sciences, Pullman, Washington, USA
| | - Marton Palatinszky
- University of Vienna, Center for Microbiology and Environmental Systems Science, Division of Microbial Ecology, Vienna, Austria
| | - Michaela A. Mausz
- University of Warwick, School of Life Sciences, Coventry, United Kingdom
| | - Siegfried Reipert
- University of Vienna, Core Facility Cell Imaging and Ultrastructure Research, Vienna, Austria
| | - Arno Schintlmeister
- University of Vienna, Center for Microbiology and Environmental Systems Science, Division of Microbial Ecology, Vienna, Austria
- University of Vienna, Center for Microbiology and Environmental Systems Science, Large-Instrument Facility for Environmental and Isotope Mass Spectrometry, Vienna, Austria
| | - Andreas Maier
- University of Vienna, Faculty of Geosciences, Geography, and Astronomy, Department of Geography and Regional Research, Geoecology, Vienna, Austria
| | - Jean-Marie Volland
- University of Vienna, Department of Functional and Evolutionary Ecology, Environmental Cell Biology Group, Vienna, Austria
| | - Claudia Hirschfeld
- University of Greifswald, Institute of Pharmacy, Department of Pharmaceutical Biotechnology, Greifswald, Germany
| | - Michael Wagner
- University of Vienna, Center for Microbiology and Environmental Systems Science, Division of Microbial Ecology, Vienna, Austria
- Aalborg University, Department of Chemistry and Bioscience, Aalborg, Denmark
| | - David Berry
- University of Vienna, Center for Microbiology and Environmental Systems Science, Division of Microbial Ecology, Vienna, Austria
- Joint Microbiome Facility of the Medical University of Vienna and the University of Vienna, Vienna, Austria
| | - Stephanie Markert
- University of Greifswald, Institute of Pharmacy, Department of Pharmaceutical Biotechnology, Greifswald, Germany
| | - Silvia Bulgheresi
- University of Vienna, Department of Functional and Evolutionary Ecology, Environmental Cell Biology Group, Vienna, Austria
| | - Lena König
- University of Vienna, Department of Functional and Evolutionary Ecology, Environmental Cell Biology Group, Vienna, Austria
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24
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van Vliet DM, von Meijenfeldt FB, Dutilh BE, Villanueva L, Sinninghe Damsté JS, Stams AJ, Sánchez‐Andrea I. The bacterial sulfur cycle in expanding dysoxic and euxinic marine waters. Environ Microbiol 2021; 23:2834-2857. [PMID: 33000514 PMCID: PMC8359478 DOI: 10.1111/1462-2920.15265] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 09/03/2020] [Accepted: 09/28/2020] [Indexed: 01/29/2023]
Abstract
Dysoxic marine waters (DMW, < 1 μM oxygen) are currently expanding in volume in the oceans, which has biogeochemical, ecological and societal consequences on a global scale. In these environments, distinct bacteria drive an active sulfur cycle, which has only recently been recognized for open-ocean DMW. This review summarizes the current knowledge on these sulfur-cycling bacteria. Critical bottlenecks and questions for future research are specifically addressed. Sulfate-reducing bacteria (SRB) are core members of DMW. However, their roles are not entirely clear, and they remain largely uncultured. We found support for their remarkable diversity and taxonomic novelty by mining metagenome-assembled genomes from the Black Sea as model ecosystem. We highlight recent insights into the metabolism of key sulfur-oxidizing SUP05 and Sulfurimonas bacteria, and discuss the probable involvement of uncultivated SAR324 and BS-GSO2 bacteria in sulfur oxidation. Uncultivated Marinimicrobia bacteria with a presumed organoheterotrophic metabolism are abundant in DMW. Like SRB, they may use specific molybdoenzymes to conserve energy from the oxidation, reduction or disproportionation of sulfur cycle intermediates such as S0 and thiosulfate, produced from the oxidation of sulfide. We expect that tailored sampling methods and a renewed focus on cultivation will yield deeper insight into sulfur-cycling bacteria in DMW.
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Affiliation(s)
- Daan M. van Vliet
- Laboratory of MicrobiologyWageningen University and Research, Stippeneng 4, 6708WEWageningenNetherlands
| | | | - Bas E. Dutilh
- Theoretical Biology and Bioinformatics, Science for LifeUtrecht University, Padualaan 8, 3584 CHUtrechtNetherlands
| | - Laura Villanueva
- Department of Marine Microbiology and BiogeochemistryRoyal Netherlands Institute for Sea Research (NIOZ), Utrecht University, Landsdiep 4, 1797 SZ, 'tHorntje (Texel)Netherlands
| | - Jaap S. Sinninghe Damsté
- Department of Marine Microbiology and BiogeochemistryRoyal Netherlands Institute for Sea Research (NIOZ), Utrecht University, Landsdiep 4, 1797 SZ, 'tHorntje (Texel)Netherlands
- Department of Earth Sciences, Faculty of GeosciencesUtrecht University, Princetonlaan 8A, 3584 CBUtrechtNetherlands
| | - Alfons J.M. Stams
- Laboratory of MicrobiologyWageningen University and Research, Stippeneng 4, 6708WEWageningenNetherlands
- Centre of Biological EngineeringUniversity of Minho, Campus de Gualtar, 4710‐057BragaPortugal
| | - Irene Sánchez‐Andrea
- Laboratory of MicrobiologyWageningen University and Research, Stippeneng 4, 6708WEWageningenNetherlands
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25
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Valkanas MM, Rosso T, Packard JE, Trun NJ. Limited carbon sources prevent sulfate remediation in circumneutral abandoned mine drainage. FEMS Microbiol Ecol 2021; 97:6070647. [PMID: 33417684 DOI: 10.1093/femsec/fiaa262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 12/31/2020] [Indexed: 01/04/2023] Open
Abstract
Passive remediation systems (PRS) use both biotic and abiotic processes to precipitate contaminants from abandoned mine drainage (AMD) so that the contaminants do not spread into local watersheds. PRS are efficient at removing heavy metals but sulfate remediation frequently does not occur. To understand the reasons for the lack of sulfate remediation, we studied four PRS that treat circumneutral AMD and one raw mine drainage discharge. Using 16S sequencing analysis, microbial community composition revealed a high relative abundance of bacterial families with sulfur cycling genera. Anaerobic abiotic studies showed that sulfide was quickly geochemically oxidized in the presence of iron hydroxides, leading to a buildup of sulfur intermediates. Supplementation of laboratory grown microbes from the PRS with lactate demonstrated the ability of actively growing microbes to overcome this abiotic sulfide oxidation by increasing the rate of sulfate reduction. Thus, the lack of carbon sources in the PRS contributes to the lack of sulfate remediation. Bacterial community analysis of 16S rRNA gene revealed that while the microbial communities in different parts of the PRS were phylogenetically distinct, the contaminated environments selected for communities that shared similar metabolic capabilities.
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Affiliation(s)
- Michelle M Valkanas
- Department of Biological Sciences, Duquesne University, 256 Mellon Hall, 600 Forbes Ave, Pittsburgh, PA 15282, USA
| | - Taylor Rosso
- Department of Biological Sciences, Duquesne University, 256 Mellon Hall, 600 Forbes Ave, Pittsburgh, PA 15282, USA
| | - Jessica E Packard
- Department of Biological Sciences, Duquesne University, 256 Mellon Hall, 600 Forbes Ave, Pittsburgh, PA 15282, USA
| | - Nancy J Trun
- Department of Biological Sciences, Duquesne University, 256 Mellon Hall, 600 Forbes Ave, Pittsburgh, PA 15282, USA
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26
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Lian FB, Chen XY, Jiang S, Li GY, Du ZJ. Marinobacter orientalis sp. nov., a thiosulfate-oxidizing bacterium isolated from a marine solar saltern. Antonie Van Leeuwenhoek 2021; 114:765-775. [PMID: 33751321 DOI: 10.1007/s10482-021-01556-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 03/06/2021] [Indexed: 11/25/2022]
Abstract
A facultatively anaerobic bacterium, strain W62T, was isolated from the marine solar saltern in Weihai, China. Cells of the novel strain were Gram-stain negative, non-flagellated, non-gliding, rod-shaped and around 0.3-0.5 × 2.5-3.9 µm in size. Optimum growth occurred at 33-37 °C, with 3-5% (w/v) NaCl and at pH 7.0-7.5. On the basis of phylogenetic analysis of the 16S rRNA gene sequence, strain W62T had close relationship with Marinobacter vulgaris F01T (98.6%), Marinobacter confluentis KCTC 42705T (98.4%) and Marinobacter halotolerans NBRC 110910T (97.7%). Genome sequencing revealed a genome size of 4,050,555 bp, a G+C content of 57.3% and a complete sox system related to thiosulfate oxidization. Strain W62T had ubiquinone-9 as the sole respiratory quinone and possessed Summed Features 3 (C16:1 ω7c/C16:1 ω6c), C16:0 and C18:1 ω9c as the major fatty acids. The major polar lipids of strain W62T were identified as aminophospholipid, phosphatidylglycerol and phosphatidylethanolamine. According to the results of the phenotypic, chemotaxonomic characterization, phylogenetic properties and genome analysis, strain W62T should represent a novel specie of the genus Marinobacter, for which the name Marinobacter orientalis sp. nov. is proposed. The type strain is W62T (= MCCC 1H00317T = KCTC 62593T).
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Affiliation(s)
- Feng-Bai Lian
- Marine College, Shandong University, Weihai, 264209, Shandong, People's Republic of China
| | - Xu-Yang Chen
- Marine College, Shandong University, Weihai, 264209, Shandong, People's Republic of China
| | - Shan Jiang
- Marine College, Shandong University, Weihai, 264209, Shandong, People's Republic of China
| | - Guang-Yu Li
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, 361000, Fujian, People's Republic of China
| | - Zong-Jun Du
- Marine College, Shandong University, Weihai, 264209, Shandong, People's Republic of China.
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27
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Lian FB, Li YQ, Zhang J, Jiang S, Du ZJ. Sulfitobacter maritimus sp. nov., isolated from coastal sediment. Int J Syst Evol Microbiol 2021; 71. [PMID: 33502295 DOI: 10.1099/ijsem.0.004659] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A facultatively anaerobic bacterium, strain S0837T, was isolated from the marine sediment of Jingzi Wharf, Weihai, China. Cells of the novel strain were Gram-stain-negative, non-flagellated, non-gliding, non-pigmented and rod-shaped. Cells were around 0.3-0.5×1.0-1.4 µm in size and often appeared singly. Optimum growth occurred at 33 °C, with 2 % (w/v) NaCl and at pH 7.0-7.5. On the basis of the results of 16S rRNA gene sequences, stain S0837T had the closest relative with Sulfitobacter delicatus KCTC 32183T (98.0 %). Genome sequencing revealed a genome size of 3 785 026 bp, a G+C content of 59.8 mol% and several genes related with sulphur oxidation. The strain shared 98.0 % 16S rRNA sequence similarities with closely related type species and shared ANI value below 95-96 %, dDDH value of showed relatedness of 27.4, 25.2 and 25.2 % respectively with the closely related type species. Strain S0837T had ubiquinone-10 as the sole respiratory quinone, and possessed summed feature 8 (C18 : 1 ω7c/C18 : 1 ω6c) as the major fatty acid. The major polar lipids were phosphatidylglycerol, phosphatidylcholine and phosphatidylethanolamine. According to the results of the phenotypic, chemotaxonomic characterization, phylogenetic properties and genome analysis, strain S0837T should represent a novel species of the genus Sulfitobacter, for which the name Sulfitobacter maritimus sp. nov. is proposed. The type strain is S0837T (=MCCC 1K04635T=KCTC 72860T).
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Affiliation(s)
- Feng-Bai Lian
- Marine College, Shandong University, Weihai 264209, Shandong, PR China
| | - Yong-Qin Li
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, Guangdong, PR China
| | - Jing Zhang
- Marine College, Shandong University, Weihai 264209, Shandong, PR China
| | - Shan Jiang
- Marine College, Shandong University, Weihai 264209, Shandong, PR China
| | - Zong-Jun Du
- Marine College, Shandong University, Weihai 264209, Shandong, PR China
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28
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Olson KR, Gao Y, Briggs A, Devireddy M, Iovino NA, Licursi M, Skora NC, Whelan J, Villa BP, Straub KD. 'Antioxidant' berries, anthocyanins, resveratrol and rosmarinic acid oxidize hydrogen sulfide to polysulfides and thiosulfate: A novel mechanism underlying their biological actions. Free Radic Biol Med 2021; 165:67-78. [PMID: 33508425 DOI: 10.1016/j.freeradbiomed.2021.01.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 01/03/2021] [Accepted: 01/17/2021] [Indexed: 12/12/2022]
Abstract
Nutraceutical polyphenol catechins in green tea oxidize H2S to polysulfides (PS) in buffer and in cells thereby conveying their cytoprotective effects. Here we measure H2S oxidation in buffer and HEK293 cells by over-the-counter nutraceuticals, blueberry, bilberry and cranberry, and by polyphenols, cyanadin (Cya), quercetin (Que), rosmarinic acid (RA) and resveratrol (Res). H2S and PS were measured with specific fluorophores, AzMc and SSP4 respectively, and thiosulfate (TS) production was measured in buffer using silver nanoparticles (AgNPs). All compounds increased polysulfide production from H2S in buffer and increased polysufides in cells. Decreasing oxygen from 100% to 21% and 0% progressively decreased PS production by Que and RA in buffer and Que decreased PS production in cells incubated in 5% O2 compared to 21% O2. Que, RA and Res, but not Cya, increased TS production from H2S in 21% O2 but not in 0% O2. Superoxide dismutase did not affect PS production from H2S by Que or TS production from H2S by Que, RA or Res, whereas catalase inhibited TS production by all three polyphenols. Conversely, these polyphenols only slightly reduce a mixed polysulfide (K2Sn) or thiosulfate to H2S in 0% O2. Collectively, our results suggest that polyphenols are autoxidized to a semiquinone radical and that this, in turn, oxidizes H2S to a thiyl radical from which polysulfides and thiosulfate derived. They also suggest that this is catalyzed by a semiquinone radical and it is independent of either superoxide or hydrogen peroxide concomitantly produced during polyphenol autoxidation. The polysulfides produced in these reactions are potent antioxidants and also initiate a variety of downstream cytoprotective effector mechanisms. It is also possible that H2S can be regenerated from the thiosulfate produced in these reactions by other cellular reductants and reused in subsequent reactions.
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Affiliation(s)
- Kenneth R Olson
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA.
| | - Yan Gao
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA
| | - Austin Briggs
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Monesh Devireddy
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA
| | - Nicholas A Iovino
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Matthew Licursi
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Nicole C Skora
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Jenna Whelan
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Brian P Villa
- Indiana University School of Medicine - South Bend Center, South Bend, IN, 46617, USA; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Karl D Straub
- Central Arkansas Veteran's Healthcare System, Little Rock, AR, 72205, USA; Departments of Medicine and Biochemistry, University of Arkansas for Medical Sciences, Little Rock, AR, 72202, USA
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29
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Environmental Impact of Sulfate-Reducing Bacteria, Their Role in Intestinal Bowel Diseases, and Possible Control by Bacteriophages. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11020735] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Sulfate-reducing bacteria (SRB) represent a group of prokaryotic microorganisms that are widely spread in the anoxic environment (seabed, riverbed and lakebed sediments, mud, intestinal tract of humans and animals, metal surfaces). SRB species also have an impact on processes occurring in the intestinal tract of humans and animals, including the connections between their presence and inflammatory bowel disease (IBD). Since these SRB can develop antimicrobial resistance toward the drugs, including antibiotics and antimicrobial agents, bacteriophages could represent an additional potential effective treatment. The main objectives of the review were as follows: (a) to review SRB (both from intestinal and environmental sources) regarding their role in intestinal diseases as well as their influence in environmental processes; and (b) to review, according to literature data, the influence of bacteriophages on SRB and their possible applications. Since SRB can have a significant adverse influence on industry as well as on humans and animals health, phage treatment of SRB can be seen as a possible effective method of SRB inhibition. However, there are relatively few studies concerning the influence of phages on SRB strains. Siphoviridae and Myoviridae families represent the main sulfide-producing bacteria phages. The most recent studies induced, by UV light, bacteriophages from Desulfovibrio vulgaris NCIMB 8303 and Desulfovibrio desulfuricans ATCC 13541. Notwithstanding costly and medically significant negative impacts of phages on SRB, they have been the subject of relatively few studies. The current search for alternatives to chemical biocides and antibiotics has led to the renewed interest in phages as antibacterial biocontrol and therapeutic agents, including their use against SRB. Hence, phages might represent a promising treatment against SRB in the future.
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30
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Becker-Kerber B, de Barros GEB, Paim PSG, Prado GMEM, da Rosa ALZ, El Albani A, Laflamme M. In situ filamentous communities from the Ediacaran (approx. 563 Ma) of Brazil. Proc Biol Sci 2021; 288:20202618. [PMID: 33402067 DOI: 10.1098/rspb.2020.2618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Precambrian filamentous microfossils are common and diverse. Nevertheless, their taxonomic assignment can be difficult owing to their overall simple shapes typically lacking in diagnostic features. Here, we report in situ communities of well-preserved, large filamentous impressions from the Ediacaran Itajaí Basin (ca 563 Ma) of Brazil. The filaments are uniserial (unbranched) and can reach up to 200 µm in width and up to 44 mm in length. They occur as both densely packed or sparsely populated surfaces, and typically show a consistent orientation. Although simple in shape, their preferred orientation suggests they were tethered to the seafloor, and their overall flexibility (e.g. bent, folded and twisted) supports a biological (rather than sedimentary) affinity. Biometric comparisons with modern filamentous groups further support their biological affinity, suggesting links with either large sulfide-oxidizing bacteria (SOB) or eukaryotes. Other morphological and palaeoecological characteristics further corroborates their similarities with modern large filamentous SOB. Their widespread occurrence and association with complex Ediacaran macrobiota (e.g. frondose organisms, Palaeopascichnus) suggest that they probably played an important role in the ecological dynamics of these early benthic communities by providing firm substrates for metazoans to inhabit. It is further hypothesized that the dynamic redox condition in the latest Ediacaran, with the non-continuous rise in oxygen concentration and periods of hypoxia, may have created ideal conditions for SOB to thrive.
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Affiliation(s)
- Bruno Becker-Kerber
- Programa de Pós-Graduação em Ecologia e Recursos Naturais, Universidade Federal de São Carlos, Washington Luiz, 325 km, São Carlos (SP) 13565-905, Brazil.,Unité Mixte de Recherche (UMR), Centre National de la Recherche Scientifique (CNRS), IC2MP 7285, University of Poitiers, 86073 Poitiers, France
| | - Gabriel Eduardo Baréa de Barros
- Programa de Pós-Graduação em Biologia Comparada, Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP), Universidade de São Paulo (USP), Avenue Bandeirantes, 3900-Vila Monte Alegre, 14049-900, Ribeirão Preto, São Paulo, Brazil
| | - Paulo Sergio Gomes Paim
- Programa de Pós-Graduação em Geologia, Universidade do Vale do Rio dos Sinos, 93.022-750, São Leopoldo (RS), Brazil
| | - Gustavo M E M Prado
- Programa de Pós Graduação em Geoquímica e Geotectônica, Instituto de Geociências, Universidade de São Paulo (USP), Avenue Bandeirantes, 3900-Vila Monte Alegre, 14049-900, Ribeirão Preto, São Paulo, Brazil
| | | | - Abderrazak El Albani
- Unité Mixte de Recherche (UMR), Centre National de la Recherche Scientifique (CNRS), IC2MP 7285, University of Poitiers, 86073 Poitiers, France
| | - Marc Laflamme
- Department of Chemical and Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road, Mississauga, Ontario, Canada L5 L 1C6
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31
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Cortese-Krott MM. Red Blood Cells as a "Central Hub" for Sulfide Bioactivity: Scavenging, Metabolism, Transport, and Cross-Talk with Nitric Oxide. Antioxid Redox Signal 2020; 33:1332-1349. [PMID: 33205994 DOI: 10.1089/ars.2020.8171] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Significance: Sulfide was revealed to be an endogenous signaling molecule regulating a plethora of cellular functions. It is involved in the regulation of fundamental processes, including blood pressure regulation, suspended animation, and metabolic activity of mitochondria, pain, and inflammation. The underlying biochemical pathways and pharmacological targets are still largely unidentified. Recent Advances: Red blood cells (RBCs) are known as oxygen transporters and were proposed to contribute to cardiovascular homeostasis by regulating nitric oxide (NO) metabolism, also via interaction of hemoglobin with nitrite and NO itself. Interestingly, recent evidence indicates that RBCs may also play a central role in systemic sulfide metabolism and homeostasis, and, potentially, in the crosstalk with NO. Heme-containing proteins such as hemoglobin were shown to be targeted by both NO and sulfide. In this article, we aim at revising and discussing the potential impact of RBCs on systemic sulfide metabolism in the cardiovascular system. Critical Issues: Although the synthetic pathways and the reactivity of hemoglobin and other heme proteins with sulfide and NO are known, the in vivo role of RBCs in sulfide metabolism, physiology, pharmacology, and its pathophysiological implications have not been characterized so far. Future Directions: To allow a better understanding of the role of RBCs in systemic sulfide metabolism and its cross-talk with NO, basic and translational science studies should be focused on dissecting the enzymatic and nonenzymatic sulfur metabolic pathways in RBCs in vivo and their impact on the cardiovascular system in animal models and clinical settings.
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Affiliation(s)
- Miriam M Cortese-Krott
- Myocardial Infarction Research Laboratory, Division of Cardiology, Pulmonology and Vascular Medicine, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany.,Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
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32
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Bioinformatic and experimental evidence for suicidal and catalytic plant THI4s. Biochem J 2020; 477:2055-2069. [PMID: 32441748 DOI: 10.1042/bcj20200297] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/20/2020] [Accepted: 05/21/2020] [Indexed: 12/14/2022]
Abstract
Like fungi and some prokaryotes, plants use a thiazole synthase (THI4) to make the thiazole precursor of thiamin. Fungal THI4s are suicide enzymes that destroy an essential active-site Cys residue to obtain the sulfur atom needed for thiazole formation. In contrast, certain prokaryotic THI4s have no active-site Cys, use sulfide as sulfur donor, and are truly catalytic. The presence of a conserved active-site Cys in plant THI4s and other indirect evidence implies that they are suicidal. To confirm this, we complemented the Arabidopsistz-1 mutant, which lacks THI4 activity, with a His-tagged Arabidopsis THI4 construct. LC-MS analysis of tryptic peptides of the THI4 extracted from leaves showed that the active-site Cys was predominantly in desulfurated form, consistent with THI4 having a suicide mechanism in planta. Unexpectedly, transcriptome data mining and deep proteome profiling showed that barley, wheat, and oat have both a widely expressed canonical THI4 with an active-site Cys, and a THI4-like paralog (non-Cys THI4) that has no active-site Cys and is the major type of THI4 in developing grains. Transcriptomic evidence also indicated that barley, wheat, and oat grains synthesize thiamin de novo, implying that their non-Cys THI4s synthesize thiazole. Structure modeling supported this inference, as did demonstration that non-Cys THI4s have significant capacity to complement thiazole auxotrophy in Escherichia coli. There is thus a prima facie case that non-Cys cereal THI4s, like their prokaryotic counterparts, are catalytic thiazole synthases. Bioenergetic calculations show that, relative to suicide THI4s, such enzymes could save substantial energy during the grain-filling period.
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Gupta D, Guzman MS, Bose A. Extracellular electron uptake by autotrophic microbes: physiological, ecological, and evolutionary implications. ACTA ACUST UNITED AC 2020; 47:863-876. [DOI: 10.1007/s10295-020-02309-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 09/07/2020] [Indexed: 02/05/2023]
Abstract
Abstract
Microbes exchange electrons with their extracellular environment via direct or indirect means. This exchange is bidirectional and supports essential microbial oxidation–reduction processes, such as respiration and photosynthesis. The microbial capacity to use electrons from insoluble electron donors, such as redox-active minerals, poised electrodes, or even other microbial cells is called extracellular electron uptake (EEU). Autotrophs with this capability can thrive in nutrient and soluble electron donor-deficient environments. As primary producers, autotrophic microbes capable of EEU greatly impact microbial ecology and play important roles in matter and energy flow in the biosphere. In this review, we discuss EEU-driven autotrophic metabolisms, their mechanism and physiology, and highlight their ecological, evolutionary, and biotechnological implications.
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Affiliation(s)
- Dinesh Gupta
- grid.4367.6 0000 0001 2355 7002 Department of Biology Washington University in St. Louis One Brookings Drive 63130 St. Louis MO USA
| | - Michael S Guzman
- grid.250008.f 0000 0001 2160 9702 Biosciences and Biotechnology Division Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory Livermore CA USA
| | - Arpita Bose
- grid.4367.6 0000 0001 2355 7002 Department of Biology Washington University in St. Louis One Brookings Drive 63130 St. Louis MO USA
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Abstract
Mismanagement of mine waste rock can mobilize acidity, metal (loid)s, and other contaminants, and thereby negatively affect downstream environments. Hence, strategic long-term planning is required to prevent and mitigate deleterious environmental impacts. Technical frameworks to support waste-rock management have existed for decades and typically combine static and kinetic testing, field-scale experiments, and sometimes reactive-transport models. Yet, the design and implementation of robust long-term solutions remains challenging to date, due to site-specificity in the generated waste rock and local weathering conditions, physicochemical heterogeneity in large-scale systems, and the intricate coupling between chemical kinetics and mass- and heat-transfer processes. This work reviews recent advances in our understanding of the hydrogeochemical behavior of mine waste rock, including improved laboratory testing procedures, innovative analytical techniques, multi-scale field investigations, and reactive-transport modeling. Remaining knowledge-gaps pertaining to the processes involved in mine waste weathering and their parameterization are identified. Practical and sustainable waste-rock management decisions can to a large extent be informed by evidence-based simplification of complex waste-rock systems and through targeted quantification of a limited number of physicochemical parameters. Future research on the key (bio)geochemical processes and transport dynamics in waste-rock piles is essential to further optimize management and minimize potential negative environmental impacts.
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Wan H, Islam MS, Qian D, Ormsbee L, Bhattacharyya D. Reductive Degradation of CCl 4 by Sulfidized Fe and Pd-Fe Nanoparticles: Kinetics, Longevity, and Morphology Aspects. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2020; 394:125013. [PMID: 33184558 PMCID: PMC7654737 DOI: 10.1016/j.cej.2020.125013] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this study a systematic comparison in morphology, long-term degradation, regeneration and reuse were conducted between palladized and sulfidized nanoscale zero-valent iron (Pd-Fe and S-Fe). Pd-Fe and S-Fe were prepared, after the synthesis of precursor Fe0 nanoparticles (spherical, ~35 nm radius) for carbon tetrachloride (CTC) treatment. With HAADF-TEM-EDS characterization, dispersive Pd islets were found on the Fe core of Pd-Fe. However, the Fe core was covered by the FeSx shell of S-Fe (FeS/FeS2 = 0.47). With an excessive Pd dose (10 mol%), the Pd-Fe were dramatically deformed to dendritic structures which significantly decreased reactivity. For CTC degradation, Pd-Fe (0.3 atomic% Pd) increased the degradation rate by 20-fold (ksa= 0.580 Lm-2min-1) while S-Fe presented a greater life time. The major intermediate chloroform (CF) was further degraded and less than 5% CF was observed after 24 h using Pd-Fe or S-Fe while above 50% CF remained using Fe. During aging, the Fe core was converted to FeOOH and Fe3O4/γ-Fe2O3. The restoration of Fe0 was achieved using NaBH4, which regenerated Fe and Pd-Fe. However, the formed FeSx shell on S-Fe was disappeared. The results suggest that S-Fe extends longevity of Fe, but the loss of FeSx after aging makes S-Fe eventually perform like Fe in terms of CTC degradation.
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Affiliation(s)
- Hongyi Wan
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Mohammad Saiful Islam
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Dali Qian
- Electron Microscopy Center, College of Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Lindell Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
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Abstract
Gold amalgam microelectrodes (GAMEs) have been characterized and successfully calibrated to measure >1.5 mM (30 mg L−1) sulfide in artificial wastewater (AWW) using cathodic stripping voltammetry (CSV). Microbial sulfide generation in two types of AWW was traced. Artificial wastewater type 1 (AWW1) held the potential for almost 50% conversion of sulfur compounds at a maximum rate of ~4.3 ± 0.5 µM h−1 while AWW 2 held a potential for 75–100% conversion at a rate of 165 µM h−1. In addition, the GAMEs were thoroughly examined during fabrication, maturation, and aging. An earlier described plating method was found to result in varying electrode surfaces due to excess mercury deposition and, therefore, deviating stripping signals. The limited shelf life of GAMEs has been proposed previously. This study shows the extent of electrode surface changes during amalgam formation and the wear and tear of application. As a result, suggestions to optimize fabrication and application are discussed to provide reliable measurements and proceed toward a future commercialization.
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Lieb HC, Nguyen BD, Ramsayer ER, Mullaugh KM. A voltammetric investigation of the sulfidation of silver nanoparticles by zinc sulfide. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 720:137685. [PMID: 32325601 DOI: 10.1016/j.scitotenv.2020.137685] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/10/2020] [Accepted: 03/01/2020] [Indexed: 06/11/2023]
Abstract
Silver nanoparticles (Ag NPs) are among the most common forms of nanoparticles in consumer products, yet the environmental implications of their widespread use remain unclear due to uncertainties about their fate. Because sulfidation of Ag NPs results in the formation of a stable silver sulfide (Ag2S) product, it is likely an important removal mechanism of bioavailable silver in natural waters. In addition to sulfide, the complete conversion of Ag NPs to Ag2S will require dissolved oxygen or some other oxidant so dispersed metal sulfides may be an important pool of reactive sulfide for such reactions in oxygenated systems. The reaction of Ag NPs with zinc sulfide (ZnS) was investigated using a voltammetric method, anodic stripping voltammetry (ASV). ASV provided sensitive, in situ measurements of the release of zinc (Zn2+) cations resulting from the cation exchange reaction between Ag NPs and ZnS. The effects of Ag NP size and surface coatings on the initial rates of sulfidation by ZnS were examined. Sulfidation of smaller Ag NPs generally occurred faster and to a greater extent due to their larger relative surface areas. Sulfidation of Ag NPs capped by citrate and lipoic acid occurred more rapidly relative to polyvinylpyrrolidone (PVP) and branched polyethylene (BPEI). This study demonstrates the utility of voltammetry for such investigations and provides insights into important factors controlling Ag NP sulfidation such as availability of dissolved oxygen, Ag NP size and Ag NP surface coating. Furthermore, this work demonstrates the importance of cation exchange reactions between silver and metal sulfides, and how the environmental release of Ag NPs could alter the speciation of other metals of environmental significance.
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Affiliation(s)
- Heather C Lieb
- Department of Chemistry & Biochemistry, 66 George St., College of Charleston, Charleston, SC, USA
| | - Bach D Nguyen
- Department of Chemistry & Biochemistry, 66 George St., College of Charleston, Charleston, SC, USA
| | - Emily R Ramsayer
- Department of Chemistry & Biochemistry, 66 George St., College of Charleston, Charleston, SC, USA
| | - Katherine M Mullaugh
- Department of Chemistry & Biochemistry, 66 George St., College of Charleston, Charleston, SC, USA.
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Transformation of S-Bearing Minerals in Organic Matter-Rich Sediments from a Saline Lake with Hydrothermal Inputs. MINERALS 2020. [DOI: 10.3390/min10060525] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Geothermal systems can provide significant amounts of hydrothermal sulfur to surface waters, increasing salinity and avoiding some of the common anthropic uses. The objective of this study was to investigate the sedimentary neoformation of S-bearing phases in organic matter-rich sediments from a saline lake with hydrothermal inputs (Sochagota Lake, Colombia). Detrital kaolinite and quartz are the main minerals of the materials deposited in the Sochagota Lake. Neoformed clay minerals (illite and illite-dioctahedral vermiculite mixed layers) are concentrated in the central and northern part of the lake in sediments with high organic matter content. The most organic matter-rich materials are characterized by S-bearing minerals: mackinawite, pyrite, and elemental sulfur (S°). FESEM, high-resolution transmission electron microscopy (HRTEM), EDS, and Raman microspectrometry have revealed the presence of cell-shape aggregates of mackinawite nanoparticles filling the inner part of plant fragments, indicating that microorganisms were involved in the hydrothermal sulfur uptake. The alteration of mackinawite in free sulfide excess environment produced the formation of framboidal pyrite. The evolution to conditions with the presence of oxygen favored the formation of complex S° morphologies.
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Scholz VV, Müller H, Koren K, Nielsen LP, Meckenstock RU. The rhizosphere of aquatic plants is a habitat for cable bacteria. FEMS Microbiol Ecol 2020; 95:5485638. [PMID: 31054245 PMCID: PMC6510695 DOI: 10.1093/femsec/fiz062] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 05/03/2019] [Indexed: 11/15/2022] Open
Abstract
Cable bacteria belonging to the family Desulfobulbaceae couple sulfide oxidation and oxygen reduction by long-distance electron transfer over centimeter distances in marine and freshwater sediments. In such habitats, aquatic plants can release oxygen into the rhizosphere. Hence, the rhizosphere constitutes an ideal habitat for cable bacteria, which have been reported on seagrass roots recently. Here, we employ experimental approaches to investigate activity, abundance, and spatial orientation of cable bacteria next to the roots of the freshwater plant Littorella uniflora. Fluorescence in situ hybridization (FISH), in combination with oxygen-sensitive planar optodes, demonstrated that cable bacteria densities are enriched at the oxic–anoxic transition zone next to roots compared to the bulk sediment in the same depth. Scanning electron microscopy showed cable bacteria along root hairs. Electric potential measurements showed a lateral electric field over centimeters from the roots, indicating cable bacteria activity. In addition, FISH revealed that cable bacteria were present in the rhizosphere of Oryza sativa (rice), Lobelia cardinalis and Salicornia europaea. Hence, the interaction of cable bacteria with aquatic plants of different growth forms and habitats indicates that the plant root–cable bacteria interaction might be a common property of aquatic plant rhizospheres.
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Affiliation(s)
- Vincent V Scholz
- Biofilm Centre, University of Duisburg-Essen, Universitätsstr. 5, 45141 Essen, Germany.,Center for Electromicrobiology, Aarhus University, Ny Munkegade 116, DK-8000 Aarhus C, Denmark
| | - Hubert Müller
- Biofilm Centre, University of Duisburg-Essen, Universitätsstr. 5, 45141 Essen, Germany
| | - Klaus Koren
- Aarhus University Centre for Water Technology, Section for Microbiology, Department of Bioscience, Aarhus University, Ny Munkegade 116, DK-8000 Aarhus C, Denmark
| | - Lars Peter Nielsen
- Center for Electromicrobiology, Aarhus University, Ny Munkegade 116, DK-8000 Aarhus C, Denmark
| | - Rainer U Meckenstock
- Biofilm Centre, University of Duisburg-Essen, Universitätsstr. 5, 45141 Essen, Germany
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40
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Sabuda MC, Brazelton WJ, Putman LI, McCollom TM, Hoehler TM, Kubo MDY, Cardace D, Schrenk MO. A dynamic microbial sulfur cycle in a serpentinizing continental ophiolite. Environ Microbiol 2020; 22:2329-2345. [PMID: 32249550 DOI: 10.1111/1462-2920.15006] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 03/19/2020] [Accepted: 03/30/2020] [Indexed: 12/11/2022]
Abstract
Serpentinization is the hydration and oxidation of ultramafic rock, which occurs as oceanic lithosphere is emplaced onto continental margins (ophiolites), and along the seafloor as faulting exposes this mantle-derived material to circulating hydrothermal fluids. This process leads to distinctive fluid chemistries as molecular hydrogen (H2 ) and hydroxyl ions (OH- ) are produced and reduced carbon compounds are mobilized. Serpentinizing ophiolites also serve as a vector to transport sulfur compounds from the seafloor onto the continents. We investigated hyperalkaline, sulfur-rich, brackish groundwater in a serpentinizing continental ophiolite to elucidate the role of sulfur compounds in fuelling in situ microbial activities. Here we illustrate that key sulfur-cycling taxa, including Dethiobacter, Desulfitispora and 'Desulforudis', persist throughout this extreme environment. Biologically catalysed redox reactions involving sulfate, sulfide and intermediate sulfur compounds are thermodynamically favourable in the groundwater, which indicates they may be vital to sustaining life in these characteristically oxidant- and energy-limited systems. Furthermore, metagenomic and metatranscriptomic analyses reveal a complex network involving sulfate reduction, sulfide oxidation and thiosulfate reactions. Our findings highlight the importance of the complete inorganic sulfur cycle in serpentinizing fluids and suggest sulfur biogeochemistry provides a key link between terrestrial serpentinizing ecosystems and their submarine heritage.
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Affiliation(s)
- Mary C Sabuda
- Department of Earth and Environmental Sciences, Michigan State University, East Lansing, MI, 48824, USA
| | | | - Lindsay I Putman
- Department of Earth and Environmental Sciences, Michigan State University, East Lansing, MI, 48824, USA.,Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, 48824, USA
| | - Tom M McCollom
- Laboratory for Atmospheric and Space Physics, UCB 600, University of Colorado-Boulder, Boulder, CO, 80309, USA
| | - Tori M Hoehler
- Exobiology Branch, NASA Ames Research Center, Moffett Field, CA, 94035, USA
| | - Michael D Y Kubo
- Exobiology Branch, NASA Ames Research Center, Moffett Field, CA, 94035, USA.,SETI Institute, Mountain View, CA, 94043, USA
| | - Dawn Cardace
- Department of Geosciences, University of Rhode Island, Kingston, RI, 02881, USA
| | - Matthew O Schrenk
- Department of Earth and Environmental Sciences, Michigan State University, East Lansing, MI, 48824, USA.,Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, 48824, USA
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41
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Abstract
The mass-independent minor oxygen isotope compositions (Δ'17O) of atmospheric O2 and [Formula: see text] are primarily regulated by their relative partial pressures, [Formula: see text]/[Formula: see text] Pyrite oxidation during chemical weathering on land consumes [Formula: see text] and generates sulfate that is carried to the ocean by rivers. The Δ'17O values of marine sulfate deposits have thus been proposed to quantitatively track ancient atmospheric conditions. This proxy assumes direct [Formula: see text] incorporation into terrestrial pyrite oxidation-derived sulfate, but a mechanistic understanding of pyrite oxidation-including oxygen sources-in weathering environments remains elusive. To address this issue, we present sulfate source estimates and Δ'17O measurements from modern rivers transecting the Annapurna Himalaya, Nepal. Sulfate in high-elevation headwaters is quantitatively sourced by pyrite oxidation, but resulting Δ'17O values imply no direct tropospheric [Formula: see text] incorporation. Rather, our results necessitate incorporation of oxygen atoms from alternative, 17O-enriched sources such as reactive oxygen species. Sulfate Δ'17O decreases significantly when moving into warm, low-elevation tributaries draining the same bedrock lithology. We interpret this to reflect overprinting of the pyrite oxidation-derived Δ'17O anomaly by microbial sulfate reduction and reoxidation, consistent with previously described major sulfur and oxygen isotope relationships. The geologic application of sulfate Δ'17O as a proxy for past [Formula: see text]/[Formula: see text] should consider both 1) alternative oxygen sources during pyrite oxidation and 2) secondary overprinting by microbial recycling.
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Marutani E, Ichinose F. Emerging pharmacological tools to control hydrogen sulfide signaling in critical illness. Intensive Care Med Exp 2020; 8:5. [PMID: 32006269 PMCID: PMC6994583 DOI: 10.1186/s40635-020-0296-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 01/20/2020] [Indexed: 12/25/2022] Open
Abstract
Hydrogen sulfide (H2S) has long been known as a toxic environmental hazard. Discovery of physiological roles of H2S as a neurotransmitter by Kimura and colleagues triggered an intensive research in the biological roles of H2S in the past decades. Manipulation of H2S levels by inhibiting H2S synthesis or administration of H2S-releasing molecules revealed beneficial as well as harmful effects of H2S. As a result, it is now established that H2S levels are tightly controlled and too much or too little H2S levels cause harm. Nonetheless, translation of sulfide-based therapy to clinical practice has been stymied due to the very low therapeutic index of sulfide and the incomplete understanding of endogenous sulfide metabolism. One potential strategy to circumvent this problem is to use a safe and stable sulfide metabolite that may mediate effects of H2S. Alternatively, endogenous sulfide levels may be controlled using specific sulfide scavengers. In this review article, the role of endogenous H2S production and catabolism will be briefly reviewed followed by an introduction of thiosulfate and H2S scavengers as novel pharmacological tools to control H2S-dependent signaling.
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Affiliation(s)
- Eizo Marutani
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, 02114, USA.
| | - Fumito Ichinose
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, 02114, USA
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He J, Miller CJ, Collins R, Wang D, Waite TD. Production of a Surface-Localized Oxidant during Oxygenation of Mackinawite (FeS). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:1167-1176. [PMID: 31858783 DOI: 10.1021/acs.est.9b03975] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The oxygenation of mackinawite (FeS) frequently occurs at anoxic-oxic interfaces in both natural and engineered systems such as intertidal sediment, in activated sludge in water treatment processes, and during sulfidized zero-valent iron particle corrosion. During reoxygenation events, FeS may drive a Fenton-like process leading to the production of strong oxidants though the details of this process are poorly understood. In this study, benzoic acid (BA) has been used to probe both the magnitude and identity of these strong oxidants under circumneutral pH conditions. The major product of BA oxidation during FeS oxygenation was found to be 2,5-dihydroxybenzoic acid (2,5-DHBA) rather than monohydroxybenzoic acids identified to be the major products in a range of hydroxyl radical (HO·)-dominated systems. Based upon relative reactivity with other competitive probes and nature of the hydroxybenzoate product distribution, it is hypothesized that the strong oxidant must be a surface-localized entity such as high-valent iron or surface-associated hydroxyl or sulfur-based radicals with reactivity differing from those formed in free solution. The importance of both the reactivity of the oxidant and adsorption of the substrate to the surface is demonstrated.
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Affiliation(s)
- Jie He
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , China
- UNSW Water Research Centre School of Civil and Environmental Engineering , UNSW , Sydney , NSW 2052 , Australia
| | - Christopher J Miller
- UNSW Water Research Centre School of Civil and Environmental Engineering , UNSW , Sydney , NSW 2052 , Australia
| | - Richard Collins
- UNSW Water Research Centre School of Civil and Environmental Engineering , UNSW , Sydney , NSW 2052 , Australia
| | - Dongsheng Wang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , China
| | - T David Waite
- UNSW Water Research Centre School of Civil and Environmental Engineering , UNSW , Sydney , NSW 2052 , Australia
- Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering , Tongji University , Shanghai 200092 , P. R. China
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Bacterial Intracellular Sulphur Globules. BACTERIAL ORGANELLES AND ORGANELLE-LIKE INCLUSIONS 2020. [DOI: 10.1007/978-3-030-60173-7_2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Cron B, Henri P, Chan CS, Macalady JL, Cosmidis J. Elemental Sulfur Formation by Sulfuricurvum kujiense Is Mediated by Extracellular Organic Compounds. Front Microbiol 2019; 10:2710. [PMID: 31827465 PMCID: PMC6890823 DOI: 10.3389/fmicb.2019.02710] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 11/08/2019] [Indexed: 11/13/2022] Open
Abstract
Elemental sulfur [S(0)] is a central and ecologically important intermediate in the sulfur cycle, which can be used by a wide diversity of microorganisms that gain energy from its oxidation, reduction, or disproportionation. S(0) is formed by oxidation of reduced sulfur species, which can be chemically or microbially mediated. A variety of sulfur-oxidizing bacteria can biomineralize S(0), either intracellularly or extracellularly. The details and mechanisms of extracellular S(0) formation by bacteria have been in particular understudied so far. An important question in this respect is how extracellular S(0) minerals can be formed and remain stable in the environment outside of their thermodynamic stability domain. It was recently discovered that S(0) minerals could be formed and stabilized by oxidizing sulfide in the presence of dissolved organic compounds, a process called S(0) organomineralization. S(0) particles formed through this mechanism possess specific signatures such as morphologies that differ from that of their inorganically precipitated counterparts, encapsulation within an organic envelope, and metastable crystal structures (presence of the monoclinic β- and γ-S8 allotropes). Here, we investigated S(0) formation by the chemolithoautotrophic sulfur-oxidizing and nitrate-reducing bacterium Sulfuricurvum kujiense (Epsilonproteobacteria). We performed a thorough characterization of the S(0) minerals produced extracellularly in cultures of this microorganism, and showed that they present all the specific signatures (morphology, association with organics, and crystal structures) of organomineralized S(0). Using "spent medium" experiments, we furthermore demonstrated that soluble extracellular compounds produced by S. kujiense are necessary to form and stabilize S(0) minerals outside of the cells. This study provides the first experimental evidence of the importance of organomineralization in microbial S(0) formation. The prevalence of organomineralization in extracellular S(0) precipitation by other sulfur bacteria remains to be investigated, and the biological role of this mechanism is still unclear. However, we propose that sulfur-oxidizing bacteria could use soluble organics to stabilize stores of bioavailable S(0) outside the cells.
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Affiliation(s)
- Brandi Cron
- Department of Geosciences, The Pennsylvania State University, University Park, PA, United States
| | - Pauline Henri
- Department of Earth Sciences, University of Delaware, Newark, DE, United States
| | - Clara S Chan
- Department of Earth Sciences, University of Delaware, Newark, DE, United States
| | - Jennifer L Macalady
- Department of Geosciences, The Pennsylvania State University, University Park, PA, United States
| | - Julie Cosmidis
- Department of Geosciences, The Pennsylvania State University, University Park, PA, United States
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Products of Sulfide/Selenite Interaction Possess Antioxidant Properties, Scavenge Superoxide-Derived Radicals, React with DNA, and Modulate Blood Pressure and Tension of Isolated Thoracic Aorta. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:9847650. [PMID: 31885828 PMCID: PMC6899273 DOI: 10.1155/2019/9847650] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 09/12/2019] [Indexed: 12/29/2022]
Abstract
Selenium (Se), an essential trace element, and hydrogen sulfide (H2S), an endogenously produced signalling molecule, affect many physiological and pathological processes. However, the biological effects of their mutual interaction have not yet been investigated. Herein, we have studied the biological and antioxidant effects of the products of the H2S (Na2S)/selenite (Na2SeO3) interaction. As detected by the UV-VIS and EPR spectroscopy, the product(s) of the H2S-Na2SeO3 and H2S-SeCl4 interaction scavenged superoxide-derived radicals and reduced ·cPTIO radical depending on the molar ratio and the preincubation time of the applied interaction mixture. The results confirmed that the transient species are formed rapidly during the interaction and exhibit a noteworthy biological activity. In contrast to H2S or selenite acting on their own, the H2S/selenite mixture cleaved DNA in a bell-shaped manner. Interestingly, selenite protected DNA from the cleavage induced by the products of H2S/H2O2 interaction. The relaxation effect of H2S on isolated thoracic aorta was eliminated when the H2S/selenite mixture was applied. The mixture inhibited the H2S biphasic effect on rat systolic and pulse blood pressure. The results point to the antioxidant properties of products of the H2S/selenite interaction and their effect to react with DNA and influence cardiovascular homeostasis. The effects of the products may contribute to explain some of the biological effects of H2S and/or selenite, and they may imply that a suitable H2S/selenite supplement might have a beneficial effect in pathological conditions arisen, e.g., from oxidative stress.
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47
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Zhu S, Liu Y, Huo Y, Chen Y, Qu Z, Yu Y, Wang Z, Fan W, Peng J, Wang Z. Addition of MnO 2 in synthesis of nano-rod erdite promoted tetracycline adsorption. Sci Rep 2019; 9:16906. [PMID: 31729438 PMCID: PMC6858339 DOI: 10.1038/s41598-019-53420-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 10/24/2019] [Indexed: 12/01/2022] Open
Abstract
Erdite is a rare sulphide mineral found in mafic and alkaline rocks. Only weakly crystallised fibrous erdite has been artificially synthesised via evaporation or the hydrothermal method, and the process generally requires 1–3 days and large amounts of energy to complete. In this study, well-crystallised erdite nanorods were produced within 3 h by using MnO2 as an auxiliary reagent in a one-step hydrothermal method. Results showed that erdite could synthesised in nanorod form with a diameter of approximately 200 nm and lengths of 0.5–3 μm by adding MnO2; moreover, the crystals grew with increasing MnO2 addition. Without MnO2, erdite particles were generated in irregular form. The capacity of the erdite nanorods for tetracycline (TC) adsorption was 2613.3 mg/g, which is higher than those of irregular erdite and other reported adsorbents. The major adsorption mechanism of the crystals involves a coordinating reaction between the −NH2 group of TC and the hydroxyl group of Fe oxyhydroxide produced from erdite hydrolysis. To the best of our knowledge, this study is the first to synthesise erdite nanorods and use them in TC adsorption. Erdite nanorods may be developed as a new material in the treatment of TC-containing wastewater.
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Affiliation(s)
- Suiyi Zhu
- School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Yanwen Liu
- School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Yang Huo
- School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Yu Chen
- Jilin Institute of Forestry Survey and Design, Changchun, 130022, China
| | - Zhan Qu
- School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Yang Yu
- Guangdong Shouhui Lantian Engineering and Technology Co., Ltd, Guangzhou, 510075, China
| | - Zhihua Wang
- School of Environment, Northeast Normal University, Changchun, 130117, China
| | - Wei Fan
- School of Environment, Northeast Normal University, Changchun, 130117, China.
| | - Juwei Peng
- School of Civil and Environment, Jilin Jianzu University, Changchun, 130117, China.
| | - Zhaofeng Wang
- Office of Sponge City Construction and Management, Qingyang, 745099, China
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48
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Lim D, Gründemann D, Seebeck FP. Total Synthesis and Functional Characterization of Selenoneine. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908967] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- David Lim
- Department for Chemistry University of Basel Mattenstrasse 24a 4002 Basel Switzerland
| | - Dirk Gründemann
- Department of Pharmacology University of Cologne, Faculty of Medicine and University Hospital Cologne Gleueler Straße 24 50931 Cologne Germany
| | - Florian P. Seebeck
- Department for Chemistry University of Basel Mattenstrasse 24a 4002 Basel Switzerland
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49
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Lim D, Gründemann D, Seebeck FP. Total Synthesis and Functional Characterization of Selenoneine. Angew Chem Int Ed Engl 2019; 58:15026-15030. [DOI: 10.1002/anie.201908967] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Indexed: 12/19/2022]
Affiliation(s)
- David Lim
- Department for Chemistry University of Basel Mattenstrasse 24a 4002 Basel Switzerland
| | - Dirk Gründemann
- Department of Pharmacology University of Cologne, Faculty of Medicine and University Hospital Cologne Gleueler Straße 24 50931 Cologne Germany
| | - Florian P. Seebeck
- Department for Chemistry University of Basel Mattenstrasse 24a 4002 Basel Switzerland
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50
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Houghton JL, Foustoukos DI, Fike DA. The effect of O 2 and pressure on thiosulfate oxidation by Thiomicrospira thermophila. GEOBIOLOGY 2019; 17:564-576. [PMID: 31180189 DOI: 10.1111/gbi.12352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 05/07/2019] [Accepted: 05/15/2019] [Indexed: 06/09/2023]
Abstract
Microbial sulfur cycling in marine sediments often occurs in environments characterized by transient chemical gradients that affect both the availability of nutrients and the activity of microbes. High turnover rates of intermediate valence sulfur compounds and the intermittent availability of oxygen in these systems greatly impact the activity of sulfur-oxidizing micro-organisms in particular. In this study, the thiosulfate-oxidizing hydrothermal vent bacterium Thiomicrospira thermophila strain EPR85 was grown in continuous culture at a range of dissolved oxygen concentrations (0.04-1.9 mM) and high pressure (5-10 MPa) in medium buffered at pH 8. Thiosulfate oxidation under these conditions produced tetrathionate, sulfate, and elemental sulfur, in contrast to previous closed-system experiments at ambient pressure during which thiosulfate was quantitatively oxidized to sulfate. The maximum observed specific growth rate at 5 MPa pressure under unlimited O2 was 0.25 hr-1 . This is comparable to the μmax (0.28 hr-1 ) observed at low pH (<6) at ambient pressure when T. thermophila produces the same mix of sulfur species. The half-saturation constant for O2 ( KO2 ) estimated from this study was 0.2 mM (at a cell density of 105 cells/ml) and was robust at all pressures tested (0.4-10 MPa), consistent with piezotolerant behavior of this strain. The cell-specific KO2 was determined to be 1.5 pmol O2 /cell. The concentrations of products formed were correlated with oxygen availability, with tetrathionate production in excess of sulfate production at all pressure conditions tested. This study provides evidence for transient sulfur storage during times when substrate concentration exceeds cell-specific KO2 and subsequent consumption when oxygen dropped below that threshold. These results may be common among sulfur oxidizers in a variety of environments (e.g., deep marine sediments to photosynthetic microbial mats).
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Affiliation(s)
- Jennifer L Houghton
- Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri
| | - Dionysis I Foustoukos
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, District of Columbia
| | - David A Fike
- Department of Earth and Planetary Sciences, Washington University, St. Louis, Missouri
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