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Behera S, Das S. Potential and prospects of Actinobacteria in the bioremediation of environmental pollutants: Cellular mechanisms and genetic regulations. Microbiol Res 2023; 273:127399. [PMID: 37150049 DOI: 10.1016/j.micres.2023.127399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 04/22/2023] [Accepted: 04/30/2023] [Indexed: 05/09/2023]
Abstract
Increasing industrialization and anthropogenic activities have resulted in the release of a wide variety of pollutants into the environment including pesticides, polycyclic aromatic hydrocarbons (PAHs), and heavy metals. These pollutants pose a serious threat to human health as well as to the ecosystem. Thus, the removal of these compounds from the environment is highly important. Mitigation of the environmental pollution caused by these pollutants via bioremediation has become a promising approach nowadays. Actinobacteria are a group of eubacteria mostly known for their ability to produce secondary metabolites. The morphological features such as spore formation, filamentous growth, higher surface area to volume ratio, and cellular mechanisms like EPS secretion, and siderophore production in Actinobacteria render higher resistance and biodegradation ability. In addition, these bacteria possess several oxidoreductase systems (oxyR, catR, furA, etc.) which help in bioremediation. Actinobacteria genera including Arthrobacter, Rhodococcus, Streptomyces, Nocardia, Microbacterium, etc. have shown great potential for the bioremediation of various pollutants. In this review, the bioremediation ability of these bacteria has been discussed in detail. The utilization of various genera of Actinobacteria for the biodegradation of organic pollutants, including pesticides and PAHs, and inorganic pollutants like heavy metals has been described. In addition, the cellular mechanisms in these microbes which help to withstand oxidative stress have been discussed. Finally, this review explores the Actinobacteria mediated strategies and recent technologies such as the utilization of mixed cultures, cell immobilization, plant-microbe interaction, utilization of biosurfactants and nanoparticles, etc., to enhance the bioremediation of various environmental pollutants.
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Affiliation(s)
- Shivananda Behera
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela 769 008, Odisha, India
| | - Surajit Das
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela 769 008, Odisha, India.
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Karafiludis S, Buzanich AG, Heinekamp C, Zimathies A, Smales GJ, Hodoroaba VD, Ten Elshof JE, Emmerling F, Stawski TM. Template-free synthesis of mesoporous and amorphous transition metal phosphate materials. NANOSCALE 2023; 15:3952-3966. [PMID: 36723216 DOI: 10.1039/d2nr05630e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
We present how mesoporosity can be engineered in transition metal phosphate (TMPs) materials in a template-free manner. The method involves the transformation of a precursor metal phosphate phase, called M-struvite (NH4MPO4·6H2O, M = Mg2+, Ni2+, Co2+, NixCo1-x2+). It relies on the thermal decomposition of crystalline M-struvite precursors to an amorphous and simultaneously mesoporous phase, which forms during degassing of NH3 and H2O. The temporal evolution of mesoporous frameworks and the response of the metal coordination environment were followed by in situ and ex situ scattering and diffraction, as well as X-ray spectroscopy. Despite sharing the same precursor struvite structure, different amorphous and mesoporous structures were obtained depending on the involved transition metal. We highlight the systematic differences in absolute surface area, pore shape, pore size, and phase transitions depending on the metal cation present in the analogous M-struvites. The amorphous structures of thermally decomposed Mg-, Ni- and NixCo1-x-struvites exhibit high surface areas and pore volumes (240 m2 g-1 and 0.32 cm-3 g-1 for Mg and 90 m2 g-1 and 0.13 cm-3 g-1 for Ni). We propose that the low-cost, environmentally friendly M-struvites could be obtained as recycling products from industrial and agricultural wastewaters. These waste products could be then upcycled into mesoporous TMPs through a simple thermal treatment for further application, for instance in (electro)catalysis.
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Affiliation(s)
- Stephanos Karafiludis
- Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany.
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Ana Guilherme Buzanich
- Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany.
| | - Christian Heinekamp
- Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany.
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Annett Zimathies
- Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany.
| | - Glen J Smales
- Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany.
| | - Vasile-Dan Hodoroaba
- Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany.
| | - Johan E Ten Elshof
- MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands
| | - Franziska Emmerling
- Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany.
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Tomasz M Stawski
- Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany.
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Extremophile Metal Resistance: Plasmid-Encoded Functions in Streptomyces mirabilis. Appl Environ Microbiol 2022; 88:e0008522. [PMID: 35604229 PMCID: PMC9195940 DOI: 10.1128/aem.00085-22] [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] [Indexed: 11/30/2022] Open
Abstract
The extreme metal tolerance of up to 130 mM NiSO4 in Streptomyces mirabilis P16B-1 was investigated. Genome sequencing revealed the presence of a large linear plasmid, pI. To identify plasmid-encoded determinants of metal resistance, a newly established transformation system was used to characterize the predicted plasmid-encoded loci nreB, hoxN, and copYZ. Reintroduction into the plasmid-cured S. mirabilis ΔpI confirmed that the predicted metal transporter gene nreB constitutes a nickel resistance factor, which was further supported by its heterologous expression in Escherichia coli. In contrast, the predicted nickel exporter gene hoxN decreased nickel tolerance, while copper tolerance was enhanced. The predicted copper-dependent transcriptional regulator gene copY did not induce tolerance toward either metal. Since genes for transfer were identified on the plasmid, its conjugational transfer to the metal-sensitive Streptomyces lividans TK24 was checked. This resulted in acquired tolerance toward 30 mM nickel and additionally increased the tolerance toward copper and cobalt, while oxidative stress tolerance remained unchanged. Intracellular nickel concentrations decreased in the transconjugant strain. The high extracellular nickel concentrations allowed for biomineralization. Plasmid transfer could also be confirmed into the co-occurring actinomycete Kribbella spp. in soil microcosms. IMPORTANCE Living in extremely metal-rich environments requires specific adaptations, and often, specific metal tolerance genes are encoded on a transferable plasmid. Here, Streptomyces mirabilis P16B-1, isolated from a former mining area and able to grow with up to 130 mM NiSO4, was investigated. The bacterial chromosome, as well as a giant plasmid, was sequenced. The plasmid-borne gene nreB was confirmed to confer metal resistance. A newly established transformation system allowed us to construct a plasmid-cured S. mirabilis as well as an nreB-rescued strain in addition to confirming nreB encoding nickel resistance if heterologously expressed in E. coli. The potential of intra- and interspecific plasmid transfer, together with the presence of metal resistance factors on that plasmid, underlines the importance of plasmids for transfer of resistance factors within a bacterial soil community.
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Biomineralization of Nickel Struvite Linked to Metal Resistance in Streptomyces mirabilis. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27103061. [PMID: 35630535 PMCID: PMC9145468 DOI: 10.3390/molecules27103061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/03/2022] [Accepted: 05/05/2022] [Indexed: 11/22/2022]
Abstract
Biomineral formation is a common trait and prominent for soil Actinobacteria, including the genus Streptomyces. We investigated the formation of nickel-containing biominerals in the presence of a heavy-metal-resistant Streptomyces mirabilis P16B-1. Biomineralization was found to occur both in solid and liquid media. Minerals were identified with Raman spectroscopy and TEM-EDX to be either Mg-containing struvite produced in media containing no nickel, or Ni-struvite where Ni replaces the Mg when nickel was present in sufficient concentrations in the media. The precipitation of Ni-struvite reduced the concentration of nickel available in the medium. Therefore, Ni-struvite precipitation is an efficient mechanism for tolerance to nickel. We discuss the contribution of a plasmid-encoded nickel efflux transporter in aiding biomineralization. In the elevated local concentrations of Ni surrounding the cells carrying this plasmid, more biominerals occurred supporting this point of view. The biominerals formed have been quantified, showing that the conditions of growth do influence mineralization. This control is also visible in differences observed to biosynthetically synthesized Ni-struvites, including the use of sterile-filtered culture supernatant. The use of the wildtype S. mirabilis P16B-1 and its plasmid-free derivative, as well as a metal-sensitive recipient, S. lividans, and the same transformed with the plasmid, allowed us to access genetic factors involved in this partial control of biomineral formation.
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Lu X, Xu W, Zeng Q, Liu W, Wang F. Quantitative, morphological, and structural analysis of Ni incorporated with struvite during precipitation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 817:152976. [PMID: 35026242 DOI: 10.1016/j.scitotenv.2022.152976] [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: 10/28/2021] [Revised: 12/21/2021] [Accepted: 01/04/2022] [Indexed: 06/14/2023]
Abstract
Struvite precipitation is a promising strategy for the simultaneous recovery of nitrogen and phosphorus from waste streams. However, waste streams typically contain high amounts of metal contaminants, including Ni, which can be easily sequestered by struvite, but the behavior of Ni during struvite precipitation remains unclear. Thus, this study investigates the influence of Ni concentrations on struvite precipitation. The quantitative X-ray diffraction (QXRD) results revealed that the purity of struvite decreased from 96.6 to 41.1% with the Ni concentrations increased from 0.1-100 mg·L-1. At lower Ni concentrations of 0.1-1 mg·L-1, scanning electron microscopy (SEM) showed a roughened surface of struvite crystal, and this was combined with X-ray absorption near edge structure (XANES) data that indicated a stack of Ni-OH and Ni-PO4 on struvite surface. At Ni concentrations of 10-25 mg·L-1, Ni primarily crystalized as Ni-struvite (NiNH4PO4·6H2O), as detected by QXRD. At higher Ni concentrations of 25-100 mg·L-1, the co-precipitation of amorphous Ni phosphate(s) (e.g., Ni3(PO4)2) and Ni hydroxide (e.g., Ni(OH)2) was identified by XANES. Specifically, the X-ray photoelectron spectroscopy (XPS) analysis detected the formation of amorphous Mg hydroxide(s) and phosphate(s) at Ni of 25-100 mg·L-1. The overall results revealed that Ni formed Ni-OH and Ni-PO4 on struvite surface at 0.1-1 mg·L-1, whereas Ni precipitated as separated phases (e.g. Ni-struvite, Ni hydroxide and phosphate) at 10-100 mg·L-1. The existence of Ni disturbed the crystal growth of struvite and promoted the formation of Ni-struvite, amorphous products during struvite formation.
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Affiliation(s)
- Xingwen Lu
- School of Environmental Science and Engineering, and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Wang Xu
- Shenzhen Environmental Monitoring Center, Shenzhen 518049, China
| | - Qinghuai Zeng
- Shenzhen Environmental Monitoring Center, Shenzhen 518049, China
| | - Weizhen Liu
- Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510006, China
| | - Fei Wang
- School of Environment, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, China.
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Yin W, Zhang B, Shi J, Liu Z. Microbial adaptation to co-occurring vanadium and microplastics in marine and riverine environments. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127646. [PMID: 34750000 DOI: 10.1016/j.jhazmat.2021.127646] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/18/2021] [Accepted: 10/27/2021] [Indexed: 05/26/2023]
Abstract
Vanadium (V) and microplastics have been respectively detected in environmental media, posing threats to ecosystem and human health. However, their co-existence situations in environment with microbial adaptation have been poorly understood. In this study, water and sediments collected from potential V polluted marine and riverine ecosystems were analyzed to reveal the distribution of V and microplastics with microbial responses. High concentrations of V (1.65-6.92 μg/L in water and 6.16-347.92 mg/kg in sediment) and microplastics (800-15600 item/m3 in water and 20-700 item/kg in sediment) co-occurred in aquatic environment. Less rich and diverse bacterial communities were colonized on microplastics compared to surrounding environment. Plastic-degrading taxa (e.g., Ralstonia, Rhodococcus) and V(V) reducers (e.g., Bacillus, Pseudomonas) were enriched in microplastic biofilms. Redundancy analysis showed that V, together with nutrients, ambient conditions and Cr, contributed significantly to the compositions of microbial community on microplastics. Besides directly acting on microbial community, V could also alter it by influencing environmental factors (e.g., pH), as indicated through structural equation model. This study advances understanding the previously ignored interactions of biogeochemical processes of V and microplastics in aquatic environment.
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Affiliation(s)
- Weiwen Yin
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, PR China
| | - Baogang Zhang
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, PR China.
| | - Jiaxin Shi
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, PR China
| | - Ziqi Liu
- School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, PR China
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Mawang CI, Azman AS, Fuad ASM, Ahamad M. Actinobacteria: An eco-friendly and promising technology for the bioaugmentation of contaminants. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2021; 32:e00679. [PMID: 34660214 PMCID: PMC8503819 DOI: 10.1016/j.btre.2021.e00679] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 08/05/2021] [Accepted: 09/20/2021] [Indexed: 11/17/2022]
Abstract
Over the past two decades, various eco-friendly approaches utilizing microbial species to clean up contaminated environments have surfaced. In this aspect, actinobacteria have demonstrated their potential in contaminant degradation. The members of actinobacteria phylum exhibits a cosmopolitan distribution, which means that they can be found widely in both aquatic and terrestrial ecosystems. Actinobacteria play important ecological roles in the environment, such as degrading complex polymers, recycling compounds, and producing bioactive molecules. Hence, using actinobacteria to clean up contaminants is an attractive method in the field of biotechnology. This can be achieved through the green technology of bioaugmentation, whereby the degradative capacity of contaminated areas can be greatly improved through the introduction of specific microorganisms. This review describes actinobacteria as an eco-friendly and a promising technology for the bioaugmentation of contaminants, with focus on pesticides and heavy metals.
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Affiliation(s)
- Christina-Injan Mawang
- Acarology Unit, Infectious Disease Research Centre, Institute for Medical Research, Ministry of Health Malaysia, National Institutes of Health Complex, Setia Alam, Shah Alam, Selangor, 40170, Malaysia
| | - Adzzie-Shazleen Azman
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor, 47500, Malaysia
| | - Aalina-Sakiinah Mohd Fuad
- Department of Biomedical Science, Kulliyyah of Allied Health Sciences, International Islamic University Malaysia Kuantan Campus, Jalan Sultan Ahmad Shah, Bandar Indera Mahkota, Kuantan, Pahang 25200, Malaysia
| | - Mariana Ahamad
- Acarology Unit, Infectious Disease Research Centre, Institute for Medical Research, Ministry of Health Malaysia, National Institutes of Health Complex, Setia Alam, Shah Alam, Selangor, 40170, Malaysia
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Dávila Costa JS, Guerrero DS, Romero CM. Streptomyces: connecting red-nano and grey biotechnology fields. Crit Rev Microbiol 2021; 48:565-576. [PMID: 34651534 DOI: 10.1080/1040841x.2021.1991272] [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: 10/20/2022]
Abstract
Anthropogenic activities are often related to the occurrence of simultaneous contaminations with heavy metals and toxic organic compounds. In addition, the increasing demand for food, clothing, and technology has increased the worldwide contamination level. Although it is not fully demonstrated, the high level of contamination in association with the indiscriminate use of antibiotics, led to the appearance of multi-resistant pathogenic microorganisms. Grey and red biotechnologies try to counteract the negative effects of pollution and antimicrobial resistance respectively. Streptomyces is well known in the field of biotechnology. In this review, we discussed the potential of these bacteria to deal with organic and inorganic pollutants and produce nanostructures with antimicrobial activity. To our knowledge, this is the first work in which a biotechnological bacterial genus such as Streptomyces is revised in two different fields of global concern, contamination, and multi-drugs resistant microorganisms.
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Affiliation(s)
| | | | - Cintia Mariana Romero
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), Tucumán, Argentina.,Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Tucumán, Argentina
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Ehrlich H, Bailey E, Wysokowski M, Jesionowski T. Forced Biomineralization: A Review. Biomimetics (Basel) 2021; 6:46. [PMID: 34287234 PMCID: PMC8293141 DOI: 10.3390/biomimetics6030046] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/29/2021] [Accepted: 07/02/2021] [Indexed: 12/31/2022] Open
Abstract
Biologically induced and controlled mineralization of metals promotes the development of protective structures to shield cells from thermal, chemical, and ultraviolet stresses. Metal biomineralization is widely considered to have been relevant for the survival of life in the environmental conditions of ancient terrestrial oceans. Similar behavior is seen among extremophilic biomineralizers today, which have evolved to inhabit a variety of industrial aqueous environments with elevated metal concentrations. As an example of extreme biomineralization, we introduce the category of "forced biomineralization", which we use to refer to the biologically mediated sequestration of dissolved metals and metalloids into minerals. We discuss forced mineralization as it is known to be carried out by a variety of organisms, including polyextremophiles in a range of psychrophilic, thermophilic, anaerobic, alkaliphilic, acidophilic, and halophilic conditions, as well as in environments with very high or toxic metal ion concentrations. While much additional work lies ahead to characterize the various pathways by which these biominerals form, forced biomineralization has been shown to provide insights for the progression of extreme biomimetics, allowing for promising new forays into creating the next generation of composites using organic-templating approaches under biologically extreme laboratory conditions relevant to a wide range of industrial conditions.
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Affiliation(s)
- Hermann Ehrlich
- Institute of Electronic and Sensor Materials, TU Bergakademie Freiberg, 09599 Freiberg, Germany
- Center for Advanced Technology, Adam Mickiewicz University, 61614 Poznan, Poland
- Centre for Climate Change Research, Toronto, ON M4P 1J4, Canada
- ICUBE-University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada
| | - Elizabeth Bailey
- Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA;
| | - Marcin Wysokowski
- Faculty of Chemical Technology, Institute of Chemical Technology and Engineering, Poznan University of Technology, 60-965 Poznan, Poland
| | - Teofil Jesionowski
- Faculty of Chemical Technology, Institute of Chemical Technology and Engineering, Poznan University of Technology, 60-965 Poznan, Poland
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Romano-Armada N, Yañez-Yazlle MF, Irazusta VP, Rajal VB, Moraga NB. Potential of Bioremediation and PGP Traits in Streptomyces as Strategies for Bio-Reclamation of Salt-Affected Soils for Agriculture. Pathogens 2020; 9:E117. [PMID: 32069867 PMCID: PMC7169405 DOI: 10.3390/pathogens9020117] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 01/31/2020] [Accepted: 02/08/2020] [Indexed: 12/11/2022] Open
Abstract
Environmental limitations influence food production and distribution, adding up to global problems like world hunger. Conditions caused by climate change require global efforts to be improved, but others like soil degradation demand local management. For many years, saline soils were not a problem; indeed, natural salinity shaped different biomes around the world. However, overall saline soils present adverse conditions for plant growth, which then translate into limitations for agriculture. Shortage on the surface of productive land, either due to depletion of arable land or to soil degradation, represents a threat to the growing worldwide population. Hence, the need to use degraded land leads scientists to think of recovery alternatives. In the case of salt-affected soils (naturally occurring or human-made), which are traditionally washed or amended with calcium salts, bio-reclamation via microbiome presents itself as an innovative and environmentally friendly option. Due to their low pathogenicity, endurance to adverse environmental conditions, and production of a wide variety of secondary metabolic compounds, members of the genus Streptomyces are good candidates for bio-reclamation of salt-affected soils. Thus, plant growth promotion and soil bioremediation strategies combine to overcome biotic and abiotic stressors, providing green management options for agriculture in the near future.
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Affiliation(s)
- Neli Romano-Armada
- Instituto de Investigaciones para la Industria Química (INIQUI), Universidad Nacional de Salta (UNSa)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Av. Bolivia 5150, Salta 4400, Argentina; (N.R.-A.); (M.F.Y.-Y.); (V.P.I.); (N.B.M.)
- Facultad de Ingeniería, UNSa, Salta 4400, Argentina
| | - María Florencia Yañez-Yazlle
- Instituto de Investigaciones para la Industria Química (INIQUI), Universidad Nacional de Salta (UNSa)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Av. Bolivia 5150, Salta 4400, Argentina; (N.R.-A.); (M.F.Y.-Y.); (V.P.I.); (N.B.M.)
- Facultad de Ciencias Naturales, UNSa, Salta 4400, Argentina
| | - Verónica P. Irazusta
- Instituto de Investigaciones para la Industria Química (INIQUI), Universidad Nacional de Salta (UNSa)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Av. Bolivia 5150, Salta 4400, Argentina; (N.R.-A.); (M.F.Y.-Y.); (V.P.I.); (N.B.M.)
- Facultad de Ciencias Naturales, UNSa, Salta 4400, Argentina
| | - Verónica B. Rajal
- Instituto de Investigaciones para la Industria Química (INIQUI), Universidad Nacional de Salta (UNSa)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Av. Bolivia 5150, Salta 4400, Argentina; (N.R.-A.); (M.F.Y.-Y.); (V.P.I.); (N.B.M.)
- Facultad de Ingeniería, UNSa, Salta 4400, Argentina
- Singapore Centre for Environmental Life Sciences Engineering (SCELSE), School of Biological Sciences, Nanyang Technological University, Singapore 639798, Singapore
| | - Norma B. Moraga
- Instituto de Investigaciones para la Industria Química (INIQUI), Universidad Nacional de Salta (UNSa)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Av. Bolivia 5150, Salta 4400, Argentina; (N.R.-A.); (M.F.Y.-Y.); (V.P.I.); (N.B.M.)
- Facultad de Ingeniería, UNSa, Salta 4400, Argentina
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Characterization of Struvite Produced by an Algal Associated Agarolytic Bacterium Exiguobacterium aestuarii St. SR 101. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2019. [DOI: 10.22207/jpam.13.2.64] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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12
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Chen X, Achal V. Biostimulation of carbonate precipitation process in soil for copper immobilization. JOURNAL OF HAZARDOUS MATERIALS 2019; 368:705-713. [PMID: 30739023 DOI: 10.1016/j.jhazmat.2019.01.108] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 01/23/2019] [Accepted: 01/30/2019] [Indexed: 05/27/2023]
Abstract
The urease-based microbially induced carbonate precipitation (MICP) is known as effective remediation strategy in soil metals remediation; however, all related studies confined to bioaugmentation. In the present study, biostimulation process was adopted for the first time in accelerating MICP in copper (Cu) immobilization in soil. The abundance, composition, and diversity of the bacterial community after biostimulation were assessed with MiSeq Illumina sequencing analysis that confirmed number and types of ureolytic and calcifying bacteria grown significantly leading to MICP process, compared to untreated soil. The results demonstrated that biostimulation induced calcite precipitation in soil that immobilized Cu mainly in carbonated fraction of soil, while soluble-exchangeable fraction decreased from 45.54 mg kg-1 to 1.55 mg kg-1 Cu in soil. Scanning electron microscopy (SEM) cum energy-dispersive X-ray spectroscopy (EDX) evaluated structure and elemental composition in Cu immobilization after biostimulation. Fourier Transform-Infra Red (FTIR) spectroscopy depicted functional chemical groups involved in copper immobilization, while X-Ray Diffraction (XRD) identified main crystalline phases or biominerals formed during biostimulation in order to carryout Cu remediation from soil.
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Affiliation(s)
- Xueyan Chen
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China
| | - Varenyam Achal
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Environmental Engineering Program, Guangdong Technion-Israel Institute of Technology, Shantou, 515063, China.
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Kiriukhina GV, Yakubovich OV, Kochetkova EM, Dimitrova OV, Volkov AS. A first Mn member in the struvite morphotropic series, CsMn(H 2O) 6(PO 4): hydrothermal synthesis, crystal structure and interconnections within the family of related phosphates. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2018; 74:936-943. [PMID: 30080169 DOI: 10.1107/s2053229618009798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 07/09/2018] [Indexed: 11/10/2022]
Abstract
Caesium manganese hexahydrate phosphate, CsMn(H2O)6(PO4), was synthesized under hydrothermal conditions. Its crystal structure was determined from single-crystal X-ray diffraction data. The novel phase crystallizes in the hexagonal space group P63mc and represents the first manganese member in the struvite morphotropic series, AM(H2O)6(TO4). Its crystal structure is built from Mn(H2O)6 octahedra and PO4 tetrahedra linked into a framework via hydrogen bonding. The large Cs atoms are encapsulated in the framework cuboctahedral cavities. It is shown that the size of the A+ ionic radius within the morphotropic series AM(H2O)6(XO4) results is certain types of crystal structures and affects the values of the unit-cell parameters. Structural relationships with Na(H2O)Mg(H2O)6(PO4) and the mineral hazenite, KNa(H2O)2Mg2(H2O)12(PO4)2, are discussed.
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Affiliation(s)
- Galina V Kiriukhina
- M. V. Lomonosov Moscow State University, Leninskye Gory 1, Moscow 119991, Russian Federation
| | - Olga V Yakubovich
- M. V. Lomonosov Moscow State University, Leninskye Gory 1, Moscow 119991, Russian Federation
| | - Ekaterina M Kochetkova
- M. V. Lomonosov Moscow State University, Leninskye Gory 1, Moscow 119991, Russian Federation
| | - Olga V Dimitrova
- M. V. Lomonosov Moscow State University, Leninskye Gory 1, Moscow 119991, Russian Federation
| | - Anatoliy S Volkov
- M. V. Lomonosov Moscow State University, Leninskye Gory 1, Moscow 119991, Russian Federation
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Ali A, Guo D, Mahar A, Wang Z, Muhammad D, Li R, Wang P, Shen F, Xue Q, Zhang Z. Role of Streptomyces pactum in phytoremediation of trace elements by Brassica juncea in mine polluted soils. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 144:387-395. [PMID: 28647606 DOI: 10.1016/j.ecoenv.2017.06.046] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 06/13/2017] [Accepted: 06/16/2017] [Indexed: 08/20/2023]
Abstract
The industrial expansion, smelting, mining and agricultural practices have increased the release of toxic trace elements (TEs) in the environment and threaten living organisms. The microbe-assisted phytoremediation is environmentally safe and provide an effective approach to remediate TEs contaminated soils. A pot experiment was conducted to test the potential of an Actinomycete, subspecies Streptomyces pactum (Act12) along with medical stone compost (MSC) by growing Brassica juncea in smelter and mines polluted soils of Feng County (FC) and Tongguan (TG, China), respectively. Results showed that Zn (7, 28%), Pb (54, 21%), Cd (16, 17%) and Cu (8, 10%) uptake in shoot and root of Brassica juncea was pronounced in FC soil. Meanwhile, the Zn (40, 14%) and Pb (82, 15%) uptake in the shoot and root were also increased in TG soil. Shoot Cd uptake remained below detection, while Cu decreased by 52% in TG soil. The Cd and Cu root uptake were increased by 17% and 33%, respectively. Results showed that TEs uptake in shoot increased with increasing Act12 dose. Shoot/root dry biomass, chlorophyll and carotenoid content in Brassica juncea were significantly influenced by the application of Act12 in FC and TG soil. The antioxidant enzymatic activities (POD, PAL, PPO and CAT) in Brassica juncea implicated enhancement in the plant defense mechanism against the TEs induced stress in contaminated soils. The extraction potential of Brasssica was further evaluated by TF (translocation factor) and MEA (metal extraction amount). Based on our findings, further investigation of Act12 assisted phytoremediation of TEs in the smelter and mines polluted soil and hyperaccumulator species are suggested for future studies.
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Affiliation(s)
- Amjad Ali
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Di Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Amanullah Mahar
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; Centre for Environmental Sciences, University of Sindh, Jamshoro 76080, Pakistan
| | - Zhen Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Dost Muhammad
- Department of Soil and Environmental Sciences, The University of Agriculture, Peshawar 25130, Pakistan
| | - Ronghua Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Ping Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Feng Shen
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Quanhong Xue
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
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Moraga NB, Irazusta V, Amoroso MJ, Rajal VB. BIO-PRECIPITATES PRODUCED BY TWO AUTOCHTHONOUS BORON TOLERANT STREPTOMYCES STRAINS. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2017; 5:3373-3383. [PMID: 29503806 PMCID: PMC5828252 DOI: 10.1016/j.jece.2017.06.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Boron is widespread in the environment. Although contaminated soils are hard to recover different strategies have been investigated in the recent years. Bioremediation is one of the most studied because it is eco-friendly and less costly than other techniques. The aim of this research was to evaluate whether two Streptomyces strains isolated from boron contaminated soils in Salta, Argentina, may help remove boron from such soils. For this, they were grown in different liquid media with two boric acid concentrations and their specific growth rate and specific boric acid consumption rate were determined. Both strains showed great capacity to remove boron from the media. Increasing boric acid concentrations affected negatively the specific growth rate, however the specific boric acid consumption rate was superior. Boron bio-precipitates were observed when the strains grew in the presence of boric acid, probably due to an adaptive response developed by the cells to the exposure, for which many proteins were differentially synthetized. This strategy to tolerate high concentrations of boron by immobilizing it in bio-precipitates has not been previously described, to the best of our knowledge, and may have a great potential application in remediating soils contaminated with boron compounds.
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Affiliation(s)
- Norma Beatriz Moraga
- Facultad de Ingeniería, Universidad Nacional de Salta (UNSa), Salta, Argentina
- Instituto de Investigaciones para la Industria Química (INIQUI), CONICET-UNSa
| | - Verónica Irazusta
- Instituto de Investigaciones para la Industria Química (INIQUI), CONICET-UNSa
- Facultad de Ciencias Naturales, UNSa, Salta, Argentina
| | - María Julia Amoroso
- Planta de Procesos Industriales y Microbiológicos (PROIMI), CONICET, Tucumán, Argentina
- Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Tucumán, Argentina
| | - Verónica Beatriz Rajal
- Facultad de Ingeniería, Universidad Nacional de Salta (UNSa), Salta, Argentina
- Instituto de Investigaciones para la Industria Química (INIQUI), CONICET-UNSa
- Singapore Centre for Environmental Life Sciences Engineering (SCELSE), School of Biological Sciences, Nanyang Technological University, Singapore
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Bizo ML, Nietzsche S, Mansfeld U, Langenhorst F, Majzlan J, Göttlicher J, Ozunu A, Formann S, Krause K, Kothe E. Response to lead pollution: mycorrhizal Pinus sylvestris forms the biomineral pyromorphite in roots and needles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:14455-14462. [PMID: 28444564 DOI: 10.1007/s11356-017-9020-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 04/10/2017] [Indexed: 06/07/2023]
Abstract
The development of mycorrhized pine seedlings grown in the presence of lead was assessed in order to investigate how higher plants can tolerate lead pollution in the environment. Examination with scanning electron microscopy (SEM) revealed that Pb uptake was prominent in the roots, while a smaller amount was found in pine needles, which requires symplastic uptake and root-to-shoot transfer. Lead was concentrated in nanocrystalline aggregates attached to the cell wall and, according to elemental microanalyses, is associated with phosphorus and chlorine. The identification of the nanocrystalline phase in roots and needles was performed by transmission electron microscopy (TEM) and synchrotron X-ray micro-diffraction (μ-XRD), revealing the presence of pyromorphite, Pb5[PO4]3(Cl, OH), in both roots and needles. The extracellular embedding of pyromorphite within plant cell walls, featuring an indented appearance of the cell wall due to a callus-like outcrop of minerals, suggests a biogenic origin. This biomineralization is interpreted as a defense mechanism of the plant against lead pollution.
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Affiliation(s)
- Maria L Bizo
- Institute of Microbiology, Friedrich Schiller University Jena, Neugasse 25, 07743, Jena, Germany.
- Faculty of Environmental Science and Engineering, Babeș-Bolyai University, Fântânele 30, 400294, Cluj-Napoca, Romania.
| | - Sandor Nietzsche
- Center for Electron Microscopy, Jena University Hospital, Ziegelmühlenweg 1, 07743, Jena, Germany
| | - Ulrich Mansfeld
- Institute of Geosciences, Friedrich Schiller University Jena, Carl-Zeiss-Promenade 10, 07745, Jena, Germany
| | - Falko Langenhorst
- Institute of Geosciences, Friedrich Schiller University Jena, Carl-Zeiss-Promenade 10, 07745, Jena, Germany
| | - Juraj Majzlan
- Institute of Geosciences, Friedrich Schiller University Jena, Carl-Zeiss-Promenade 10, 07745, Jena, Germany
| | - Jörg Göttlicher
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, Hermann-v.-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Alexandru Ozunu
- Faculty of Environmental Science and Engineering, Babeș-Bolyai University, Fântânele 30, 400294, Cluj-Napoca, Romania
| | - Steffi Formann
- Institute of Microbiology, Friedrich Schiller University Jena, Neugasse 25, 07743, Jena, Germany
| | - Katrin Krause
- Institute of Microbiology, Friedrich Schiller University Jena, Neugasse 25, 07743, Jena, Germany
| | - Erika Kothe
- Institute of Microbiology, Friedrich Schiller University Jena, Neugasse 25, 07743, Jena, Germany
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Undabarrena A, Ugalde JA, Seeger M, Cámara B. -Genomic data mining of the marine actinobacteria Streptomyces sp. H-KF8 unveils insights into multi-stress related genes and metabolic pathways involved in antimicrobial synthesis. PeerJ 2017; 5:e2912. [PMID: 28229018 PMCID: PMC5312570 DOI: 10.7717/peerj.2912] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 12/14/2016] [Indexed: 12/25/2022] Open
Abstract
Streptomyces sp. H-KF8 is an actinobacterial strain isolated from marine sediments of a Chilean Patagonian fjord. Morphological characterization together with antibacterial activity was assessed in various culture media, revealing a carbon-source dependent activity mainly against Gram-positive bacteria (S. aureus and L. monocytogenes). Genome mining of this antibacterial-producing bacterium revealed the presence of 26 biosynthetic gene clusters (BGCs) for secondary metabolites, where among them, 81% have low similarities with known BGCs. In addition, a genomic search in Streptomyces sp. H-KF8 unveiled the presence of a wide variety of genetic determinants related to heavy metal resistance (49 genes), oxidative stress (69 genes) and antibiotic resistance (97 genes). This study revealed that the marine-derived Streptomyces sp. H-KF8 bacterium has the capability to tolerate a diverse set of heavy metals such as copper, cobalt, mercury, chromate and nickel; as well as the highly toxic tellurite, a feature first time described for Streptomyces. In addition, Streptomyces sp. H-KF8 possesses a major resistance towards oxidative stress, in comparison to the soil reference strain Streptomyces violaceoruber A3(2). Moreover, Streptomyces sp. H-KF8 showed resistance to 88% of the antibiotics tested, indicating overall, a strong response to several abiotic stressors. The combination of these biological traits confirms the metabolic versatility of Streptomyces sp. H-KF8, a genetically well-prepared microorganism with the ability to confront the dynamics of the fjord-unique marine environment.
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Affiliation(s)
- Agustina Undabarrena
- Departmento de Química & Centro de Biotecnología, Universidad Técnica Federico Santa María , Valparaiso , Chile
| | - Juan A Ugalde
- Centro de Genética y Genómica, Facultad de Medicina Clinica Alemana, Universidad del Desarrollo , Santiago , Chile
| | - Michael Seeger
- Departmento de Química & Centro de Biotecnología, Universidad Técnica Federico Santa María , Valparaiso , Chile
| | - Beatriz Cámara
- Departmento de Química & Centro de Biotecnología, Universidad Técnica Federico Santa María , Valparaiso , Chile
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18
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Alvarez A, Saez JM, Davila Costa JS, Colin VL, Fuentes MS, Cuozzo SA, Benimeli CS, Polti MA, Amoroso MJ. Actinobacteria: Current research and perspectives for bioremediation of pesticides and heavy metals. CHEMOSPHERE 2017; 166:41-62. [PMID: 27684437 DOI: 10.1016/j.chemosphere.2016.09.070] [Citation(s) in RCA: 263] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 09/15/2016] [Accepted: 09/16/2016] [Indexed: 05/03/2023]
Abstract
Actinobacteria exhibit cosmopolitan distribution since their members are widely distributed in aquatic and terrestrial ecosystems. In the environment they play relevant ecological roles including recycling of substances, degradation of complex polymers, and production of bioactive molecules. Biotechnological potential of actinobacteria in the environment was demonstrated by their ability to remove organic and inorganic pollutants. This ability is the reason why actinobacteria have received special attention as candidates for bioremediation, which has gained importance because of the widespread release of contaminants into the environment. Among organic contaminants, pesticides are widely used for pest control, although the negative impact of these chemicals in the environmental balance is increasingly becoming apparent. Similarly, the extensive application of heavy metals in industrial processes lead to highly contaminated areas worldwide. Several studies focused in the use of actinobacteria for cleaning up the environment were performed in the last 15 years. Strategies such as bioaugmentation, biostimulation, cell immobilization, production of biosurfactants, design of defined mixed cultures and the use of plant-microbe systems were developed to enhance the capabilities of actinobacteria in bioremediation. In this review, we compiled and discussed works focused in the study of different bioremediation strategies using actinobacteria and how they contributed to the improvement of the already existing strategies. In addition, we discuss the importance of omic studies to elucidate mechanisms and regulations that bacteria use to cope with pollutant toxicity, since they are still little known in actinobacteria. A brief account of sources and harmful effects of pesticides and heavy metals is also given.
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Affiliation(s)
- Analia Alvarez
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), Avenida Belgrano y Pasaje Caseros, Tucumán 4000, Argentina; Facultad de Ciencias Naturales e Instituto Miguel Lillo, Universidad Nacional de Tucumán (UNT), Miguel Lillo 205, Tucumán 4000, Argentina.
| | - Juliana Maria Saez
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), Avenida Belgrano y Pasaje Caseros, Tucumán 4000, Argentina.
| | - José Sebastian Davila Costa
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), Avenida Belgrano y Pasaje Caseros, Tucumán 4000, Argentina.
| | - Veronica Leticia Colin
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), Avenida Belgrano y Pasaje Caseros, Tucumán 4000, Argentina.
| | - María Soledad Fuentes
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), Avenida Belgrano y Pasaje Caseros, Tucumán 4000, Argentina.
| | - Sergio Antonio Cuozzo
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), Avenida Belgrano y Pasaje Caseros, Tucumán 4000, Argentina; Facultad de Ciencias Naturales e Instituto Miguel Lillo, Universidad Nacional de Tucumán (UNT), Miguel Lillo 205, Tucumán 4000, Argentina.
| | - Claudia Susana Benimeli
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), Avenida Belgrano y Pasaje Caseros, Tucumán 4000, Argentina.
| | - Marta Alejandra Polti
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), Avenida Belgrano y Pasaje Caseros, Tucumán 4000, Argentina; Facultad de Ciencias Naturales e Instituto Miguel Lillo, Universidad Nacional de Tucumán (UNT), Miguel Lillo 205, Tucumán 4000, Argentina.
| | - María Julia Amoroso
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), Avenida Belgrano y Pasaje Caseros, Tucumán 4000, Argentina.
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Singh R, Yoon H, Sanford RA, Katz L, Fouke BW, Werth CJ. Metabolism-Induced CaCO3 Biomineralization During Reactive Transport in a Micromodel: Implications for Porosity Alteration. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:12094-12104. [PMID: 26348257 DOI: 10.1021/acs.est.5b00152] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The ability of Pseudomonas stutzeri strain DCP-Ps1 to drive CaCO3 biomineralization has been investigated in a microfluidic flowcell (i.e., micromodel) that simulates subsurface porous media. Results indicate that CaCO3 precipitation occurs during NO3(-) reduction with a maximum saturation index (SIcalcite) of ∼1.56, but not when NO3(-) was removed, inactive biomass remained, and pH and alkalinity were adjusted to SIcalcite ∼ 1.56. CaCO3 precipitation was promoted by metabolically active cultures of strain DCP-Ps1, which at similar values of SIcalcite, have a more negative surface charge than inactive strain DCP-Ps1. A two-stage NO3(-) reduction (NO3(-) → NO2(-) → N2) pore-scale reactive transport model was used to evaluate denitrification kinetics, which was observed in the micromodel as upper (NO3(-) reduction) and lower (NO2(-) reduction) horizontal zones of biomass growth with CaCO3 precipitation exclusively in the lower zone. Model results are consistent with two biomass growth regions and indicate that precipitation occurred in the lower zone because the largest increase in pH and alkalinity is associated with NO2(-) reduction. CaCO3 precipitates typically occupied the entire vertical depth of pores and impacted porosity, permeability, and flow. This study provides a framework for incorporating microbial activity in biogeochemistry models, which often base biomineralization only on SI (caused by biotic or abiotic reactions) and, thereby, underpredict the extent of this complex process. These results have wide-ranging implications for understanding reactive transport in relevance to groundwater remediation, CO2 sequestration, and enhanced oil recovery.
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Affiliation(s)
| | - Hongkyu Yoon
- Geoscience Research and Applications, Sandia National Laboratories , Albuquerque, New Mexico 87185, United States
| | | | - Lynn Katz
- Civil, Architectural and Environmental Engineering, University of Texas at Austin , Austin, Texas 78712, United States
| | | | - Charles J Werth
- Civil, Architectural and Environmental Engineering, University of Texas at Austin , Austin, Texas 78712, United States
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20
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Phieler R, Voit A, Kothe E. Microbially supported phytoremediation of heavy metal contaminated soils: strategies and applications. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2015; 141:211-35. [PMID: 23719709 DOI: 10.1007/10_2013_200] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Heavy metal contamination of soil as a result of, for example, mining operations, evokes worldwide concern. The use of selected metal-accumulating plants to clean up heavy metal contaminated sites represents a sustainable and inexpensive method for remediation approaches and, at the same time, avoids destruction of soil function. Within this scenario, phytoremediation is the use of plants (directly or indirectly) to reduce the risks of contaminants in soil to the environment and human health. Microbially assisted bioremediation strategies, such as phytoextraction or phytostabilization, may increase the beneficial aspects and can be viewed as potentially useful methods for application in remediation of low and heterogeneously contaminated soil. The plant-microbe interactions in phytoremediation strategies include mutually beneficial symbiotic associations such as mycorrhiza, plant growth promoting bacteria (PGPB), or endophytic bacteria that are discussed with respect to their impact on phytoremediation approaches.
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Affiliation(s)
- René Phieler
- Institute of Microbiology-Microbial Communication, Friedrich Schiller University, Neugasse 25, 07743, Jena, Germany
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21
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Suryawanshi VB, Chaudhari RT. Synthesis and Characterization of Struvite-k Crystals by Agar Gel. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/jcpt.2014.44026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Heavy metal resistant strains are widespread along Streptomyces phylogeny. Mol Phylogenet Evol 2013; 66:1083-8. [DOI: 10.1016/j.ympev.2012.11.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 11/23/2012] [Accepted: 11/27/2012] [Indexed: 11/20/2022]
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23
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24
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Grawunder A, Merten D. Rare Earth Elements in Acidic Systems – Biotic and Abiotic Impacts. SOIL BIOLOGY 2012. [DOI: 10.1007/978-3-642-23327-2_4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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RcnB is a periplasmic protein essential for maintaining intracellular Ni and Co concentrations in Escherichia coli. J Bacteriol 2011; 193:3785-93. [PMID: 21665978 DOI: 10.1128/jb.05032-11] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Nickel and cobalt are both essential trace elements that are toxic when present in excess. The main resistance mechanism that bacteria use to overcome this toxicity is the efflux of these cations out of the cytoplasm. RND (resistance-nodulation-cell division)- and MFS (major facilitator superfamily)-type efflux systems are known to export either nickel or cobalt. The RcnA efflux pump, which belongs to a unique family, is responsible for the detoxification of Ni and Co in Escherichia coli. In this work, the role of the gene yohN, which is located downstream of rcnA, is investigated. yohN is cotranscribed with rcnA, and its expression is induced by Ni and Co. Surprisingly, in contrast to the effect of deleting rcnA, deletion of yohN conferred enhanced resistance to Ni and Co in E. coli, accompanied by decreased metal accumulation. We show that YohN is localized to the periplasm and does not bind Ni or Co ions directly. Physiological and genetic experiments demonstrate that YohN is not involved in Ni import. YohN is conserved among proteobacteria and belongs to a new family of proteins; consequently, yohN has been renamed rcnB. We show that the enhanced resistance of rcnB mutants to Ni and Co and their decreased Ni and Co intracellular accumulation are linked to the greater efflux of these ions in the absence of rcnB. Taken together, these results suggest that RcnB is required to maintain metal ion homeostasis, in conjunction with the efflux pump RcnA, presumably by modulating RcnA-mediated export of Ni and Co to avoid excess efflux of Ni and Co ions via an unknown novel mechanism.
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González-Muñoz MT, Rodriguez-Navarro C, Martínez-Ruiz F, Arias JM, Merroun ML, Rodriguez-Gallego M. Bacterial biomineralization: new insights from Myxococcus-induced mineral precipitation. ACTA ACUST UNITED AC 2010. [DOI: 10.1144/sp336.3] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AbstractBacteria have contributed to the formation of minerals since the advent of life on Earth. Bacterial biomineralization plays a critical role on biogeochemical cycles and has important technological and environmental applications. Despite the numerous efforts to better understand how bacteria induce/mediate or control mineralization, our current knowledge is far from complete. Considering that the number of recent publications on bacterial biomineralization has been overwhelming, here we attempt to show the importance of bacteria–mineral interactions by focusing in a single bacterial genus, Myxococcus, which displays an unusual capacity of producing minerals of varying compositions and morphologies. First, an overview of the recent history of bacterial mineralization, the most common bacteriogenic minerals and current models on bacterial biomineralization is presented. Afterwards a description of myxobacteria is presented, followed by a section where Myxococcus-induced precipitation of a number of phosphates, carbonates, sulphates, chlorides, oxalates and silicates is described and discussed in lieu of the information presented in the first part. As concluding remarks, implications of bacterial mineralization and perspectives for future research are outlined. This review strives to show that the mechanisms which control bacterial biomineralization are not mineral- or bacterial-specific. On the contrary, they appear to be universal and depend on the environment in which bacteria dwell.
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Affiliation(s)
| | - Carlos Rodriguez-Navarro
- Departamento de Mineralogía y Petrología, Universidad de Granada, Fuentenueva s/n, 18002, Granada, Spain
| | - Francisca Martínez-Ruiz
- Instituto Andaluz de Ciencias de la Tierra, CSIC – Universidad de Granada, Fuentenueva s/n, 18002, Granada, Spain
| | - Jose Maria Arias
- Departamento de Microbiología, Universidad de Granada, Fuentenueva s/n, 18002, Granada, Spain
| | - Mohamed L. Merroun
- Institute of Radiochemistry, Forschungszentrum Dresden-Rossendorf, D–01314, Dresden, Germany; Present address: Departamento de Microbiología, Universidad de Granada, Granada, Spain
| | - Manuel Rodriguez-Gallego
- Departamento de Mineralogía y Petrología, Universidad de Granada, Fuentenueva s/n, 18002, Granada, Spain
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Haferburg G, Kothe E. Metallomics: lessons for metalliferous soil remediation. Appl Microbiol Biotechnol 2010; 87:1271-80. [PMID: 20532755 DOI: 10.1007/s00253-010-2695-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Revised: 05/19/2010] [Accepted: 05/19/2010] [Indexed: 10/19/2022]
Abstract
The term metallomics has been established for the investigation of transcriptome, proteome, and metabolome changes induced by metals. The mechanisms allowing the organisms to cope with metals in the environment, metal resistance factors, will in turn change biogeochemical cycles of metals in soil, coupling the metal pool with the root system of plants. This makes microorganisms key players in introducing metals into food webs, as well as for bioremediation strategies. Research on physiological and metabolic responses of microorganisms on metal stress in soil is thus essential for the selection of optimized consortia applicable in bioremediation strategies such as bioaugmentation or microbially enhanced phytoextraction. The results of metallomics studies will help to develop applications including identification of biomarkers for ecotoxicological studies, bioleaching, in situ soil regeneration, and microbially assisted phytoremediation of contaminated land. This review will therefore focus on the molecular understanding of metal resistance in bacteria and fungi, as can be derived from metallomics studies.
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Affiliation(s)
- Götz Haferburg
- Institute of Microbiology, Friedrich Schiller University, Neugasse 25, 07743 Jena, Germany.
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Streptomycete Heavy Metal Resistance: Extracellular and Intracellular Mechanisms. SOIL BIOLOGY 2010. [DOI: 10.1007/978-3-642-02436-8_10] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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