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Singh A, Yadav VK, Chundawat RS, Soltane R, Awwad NS, Ibrahium HA, Yadav KK, Vicas SI. Enhancing plant growth promoting rhizobacterial activities through consortium exposure: A review. Front Bioeng Biotechnol 2023; 11:1099999. [PMID: 36865031 PMCID: PMC9972119 DOI: 10.3389/fbioe.2023.1099999] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/16/2023] [Indexed: 02/12/2023] Open
Abstract
Plant Growth Promoting Rhizobacteria (PGPR) has gained immense importance in the last decade due to its in-depth study and the role of the rhizosphere as an ecological unit in the biosphere. A putative PGPR is considered PGPR only when it may have a positive impact on the plant after inoculation. From the various pieces of literature, it has been found that these bacteria improve the growth of plants and their products through their plant growth-promoting activities. A microbial consortium has a positive effect on plant growth-promoting (PGP) activities evident by the literature. In the natural ecosystem, rhizobacteria interact synergistically and antagonistically with each other in the form of a consortium, but in a natural consortium, there are various oscillating environmental conditions that affect the potential mechanism of the consortium. For the sustainable development of our ecological environment, it is our utmost necessity to maintain the stability of the rhizobacterial consortium in fluctuating environmental conditions. In the last decade, various studies have been conducted to design synthetic rhizobacterial consortium that helps to integrate cross-feeding over microbial strains and reveal their social interactions. In this review, the authors have emphasized covering all the studies on designing synthetic rhizobacterial consortiums, their strategies, mechanism, and their application in the field of environmental ecology and biotechnology.
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Affiliation(s)
- Anamika Singh
- Department of Biosciences, School of Liberal Arts and Sciences, Mody University of Science and Technology, Sikar, Rajasthan, India
| | - Virendra Kumar Yadav
- Department of Biosciences, School of Liberal Arts and Sciences, Mody University of Science and Technology, Sikar, Rajasthan, India
| | - Rajendra Singh Chundawat
- Department of Biosciences, School of Liberal Arts and Sciences, Mody University of Science and Technology, Sikar, Rajasthan, India
| | - Raya Soltane
- Department of Basic Sciences, Adham University College, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Nasser S. Awwad
- Chemistry Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Hala A. Ibrahium
- Biology Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
- Department of Semi Pilot Plant, Nuclear Materials Authority, El Maadi, Egypt
| | - Krishna Kumar Yadav
- Faculty of Science and Technology, Madhyanchal Professional University, Bhopal, India
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Kurbanalieva S, Arlyapov V, Kharkova A, Perchikov R, Kamanina O, Melnikov P, Popova N, Machulin A, Tarasov S, Saverina E, Vereshchagin A, Reshetilov A. Electroactive Biofilms of Activated Sludge Microorganisms on a Nanostructured Surface as the Basis for a Highly Sensitive Biochemical Oxygen Demand Biosensor. SENSORS (BASEL, SWITZERLAND) 2022; 22:s22166049. [PMID: 36015810 PMCID: PMC9414782 DOI: 10.3390/s22166049] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 05/04/2023]
Abstract
The possibility of the developing a biochemical oxygen demand (BOD) biosensor based on electroactive biofilms of activated sludge grown on the surface of a graphite-paste electrode modified with carbon nanotubes was studied. A complex of microscopic methods controlled biofilm formation: optical microscopy with phase contrast, scanning electron microscopy, and laser confocal microscopy. The features of charge transfer in the obtained electroactive biofilms were studied using the methods of cyclic voltammetry and electrochemical impedance spectroscopy. The rate constant of the interaction of microorganisms with the extracellular electron carrier (0.79 ± 0.03 dm3(g s)-1) and the heterogeneous rate constant of electron transfer (0.34 ± 0.02 cm s-1) were determined using the cyclic voltammetry method. These results revealed that the modification of the carbon nanotubes' (CNT) electrode surface makes it possible to create electroactive biofilms. An analysis of the metrological and analytical characteristics of the created biosensors showed that the lower limit of the biosensor based on an electroactive biofilm of activated sludge is 0.41 mgO2/dm3, which makes it possible to analyze almost any water sample. Analysis of 12 surface water samples showed a high correlation (R2 = 0.99) with the results of the standard method for determining biochemical oxygen demand.
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Affiliation(s)
- Saniyat Kurbanalieva
- Laboratory of Biologically Active Compounds and Biocomposites, Tula State University, Lenin Pr. 92, Tula 300012, Russia
| | - Vyacheslav Arlyapov
- Laboratory of Biologically Active Compounds and Biocomposites, Tula State University, Lenin Pr. 92, Tula 300012, Russia
- Correspondence:
| | - Anna Kharkova
- Laboratory of Biologically Active Compounds and Biocomposites, Tula State University, Lenin Pr. 92, Tula 300012, Russia
| | - Roman Perchikov
- Laboratory of Biologically Active Compounds and Biocomposites, Tula State University, Lenin Pr. 92, Tula 300012, Russia
| | - Olga Kamanina
- Laboratory of Biologically Active Compounds and Biocomposites, Tula State University, Lenin Pr. 92, Tula 300012, Russia
| | - Pavel Melnikov
- M. V. Lomonosov Institute of Fine Chemical Technologies, MIREA—Russian Technological University, Prosp. Vernadskogo 86, Moscow 119571, Russia
| | - Nadezhda Popova
- Federal State Budgetary Institution of Science Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences, Leninsky Prosp., 31 k. 4., Moscow 119071, Russia
| | - Andrey Machulin
- Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences—A Separate Subdivision of the FRC Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Prosp. Science 3, Pushchino 142290, Russia
| | - Sergey Tarasov
- Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences—A Separate Subdivision of the FRC Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Prosp. Science 3, Pushchino 142290, Russia
| | - Evgeniya Saverina
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky Pr. 47, Moscow 119991, Russia
| | - Anatoly Vereshchagin
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky Pr. 47, Moscow 119991, Russia
| | - Anatoly Reshetilov
- Institute of Biochemistry and Physiology of Microorganisms of the Russian Academy of Sciences—A Separate Subdivision of the FRC Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Prosp. Science 3, Pushchino 142290, Russia
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Abstract
Jarosite, beudantite and alunite are members of the alunite supergroup. Minerals like those have been detected in different environments on Earth. These jarosite-type compounds are common in acid rock drainage environments and acid sulfate soils, resulting from the weathering of sulfide ores; they are also present in bioleaching systems because they are found in cultures of iron-oxidizing microorganisms. Jarosite is also generated in hydrometallurgical circuits, mainly in zinc hydrometallurgy. These minerals can be used to immobilize different elements such as arsenic and lead, among others. Jarosite and alunite have also been detected on the surface of Mars; the presence of jarosite and alunite and other sulfates provides evidence for the existence of water on Mars. In this work, an exhaustive review of the natural formation, synthesis, structure, thermodynamics, and reactivity of jarosite, beudantite and alunite are included. The capacity of jarosites for the immobilization of the elements, such as lead and arsenic, and information about studies related to jarosite formation on Mars are also included.
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Abramov SM, Straub D, Tejada J, Grimm L, Schädler F, Bulaev A, Thorwarth H, Amils R, Kappler A, Kleindienst S. Biogeochemical Niches of Fe-Cycling Communities Influencing Heavy Metal Transport along the Rio Tinto, Spain. Appl Environ Microbiol 2022; 88:e0229021. [PMID: 34910570 PMCID: PMC8863065 DOI: 10.1128/aem.02290-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 12/07/2021] [Indexed: 11/20/2022] Open
Abstract
In the mining-impacted Rio Tinto, Spain, Fe-cycling microorganisms influence the transport of heavy metals (HMs) into the Atlantic Ocean. However, it remains largely unknown how spatial and temporal hydrogeochemical gradients along the Rio Tinto shape the composition of Fe-cycling microbial communities and how this in turn affects HM mobility. Using a combination of DNA- and RNA-based 16S rRNA (gene) amplicon sequencing and hydrogeochemical analyses, we explored the impact of pH, Fe(III), Fe(II), and Cl- on Fe-cycling microorganisms. We showed that the water column at the acidic (pH 2.2) middle course of the river was colonized by Fe(II) oxidizers affiliated with Acidithiobacillus and Leptospirillum. At the upper estuary, daily fluctuations of pH (2.7 to 3.7) and Cl- (6.9 to 16.6 g/L) contributed to the establishment of a unique microbial community, including Fe(II) oxidizers belonging to Acidihalobacter, Marinobacter, and Mariprofundus, identified at this site. Furthermore, DNA- and RNA-based profiles of the benthic community suggested that acidophilic and neutrophilic Fe(II) oxidizers (e.g., Acidihalobacter, Marinobacter, and Mariprofundus), Fe(III) reducers (e.g., Thermoanaerobaculum), and sulfate-reducing bacteria drive the Fe cycle in the estuarine sediments. RNA-based relative abundances of Leptospirillum at the middle course as well as abundances of Acidihalobacter and Mariprofundus at the upper estuary were higher than DNA-based results, suggesting a potentially higher level of activity of these taxa. Based on our findings, we propose a model of how tidal water affects the composition and activity of the Fe-cycling taxa, playing an important role in the transport of HMs (e.g., As, Cd, Cr, and Pb) along the Rio Tinto. IMPORTANCE The estuary of the Rio Tinto is a unique environment in which extremely acidic, heavy metal-rich, and especially iron-rich river water is mixed with seawater. Due to the mixing events, the estuarine water is characterized by a low pH, almost seawater salinity, and high concentrations of bioavailable iron. The unusual hydrogeochemistry maintains unique microbial communities in the estuarine water and in the sediment. These communities include halotolerant iron-oxidizing microorganisms which typically inhabit acidic saline environments and marine iron-oxidizing microorganisms which, in contrast, are not typically found in acidic environments. Furthermore, highly saline estuarine water favored the prosperity of acidophilic heterotrophs, typically inhabiting brackish and saline environments. The Rio Tinto estuarine sediment harbors a diverse microbial community with both acidophilic and neutrophilic members that can mediate the iron cycle and, in turn, can directly impact the mobility and transport of heavy metals in the Rio Tinto estuary.
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Affiliation(s)
- Sergey M. Abramov
- Microbial Ecology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Baden-Württemberg, Germany
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Baden-Württemberg, Germany
| | - Daniel Straub
- Microbial Ecology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Baden-Württemberg, Germany
- Quantitative Biology Center, University of Tuebingen, Tuebingen, Baden-Württemberg, Germany
| | - Julian Tejada
- University of Applied Forest Sciences Rottenburg, Rottenburg am Neckar, Baden-Württemberg, Germany
| | - Lars Grimm
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Baden-Württemberg, Germany
| | - Franziska Schädler
- Microbial Ecology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Baden-Württemberg, Germany
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Baden-Württemberg, Germany
| | - Aleksandr Bulaev
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
| | - Harald Thorwarth
- University of Applied Forest Sciences Rottenburg, Rottenburg am Neckar, Baden-Württemberg, Germany
| | - Ricardo Amils
- Centre for Molecular Biology Severo Ochoa, Autonomous University of Madrid, Madrid, Spain
| | - Andreas Kappler
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Baden-Württemberg, Germany
- Cluster of Excellence EXC 2124, Controlling Microbes to Fight Infection, Tuebingen, Baden-Württemberg, Germany
| | - Sara Kleindienst
- Microbial Ecology, Center for Applied Geosciences, University of Tuebingen, Tuebingen, Baden-Württemberg, Germany
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Abramov SM, Tejada J, Grimm L, Schädler F, Bulaev A, Tomaszewski EJ, Byrne JM, Straub D, Thorwarth H, Amils R, Kleindienst S, Kappler A. Role of biogenic Fe(III) minerals as a sink and carrier of heavy metals in the Rio Tinto, Spain. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 718:137294. [PMID: 32097837 DOI: 10.1016/j.scitotenv.2020.137294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/11/2020] [Accepted: 02/11/2020] [Indexed: 06/10/2023]
Abstract
Oxidation of sulfide ores in the Iberian Pyrite Belt region leads to the presence of extremely high concentration of dissolved heavy metals (HMs) in the acidic water of the Rio Tinto. Fe(II) is microbially oxidized resulting in the formation of suspended particulate matter (SPM) consisting of microbial cells and Fe(III) minerals with co-precipitated HMs. Although substantial amount of HM-bearing SPM is likely deposited to river sediment, a portion can still be transported through estuary to the coastal ocean. Therefore, the mechanisms of SPM formation and transport along the Rio Tinto are important for coastal-estuarine zone. In order to reveal these mechanisms, we performed diurnal sampling of Rio Tinto water, mineralogical and elemental analysis of sediment from the middle course and the estuary of the river. We identified two divergent but interrelated pathways of HM transfer. The first longitudinal pathway is the transport of SPM-associated metals such as As (6.58 μg/L), Pb (3.51 μg/L) and Cr (1.30 μg/L) to the coastal ocean. The second sedimentation pathway contributes to the continuous burial of HMs in the sediment throughout the river. In the middle course, sediment undergoes mineralogical transformations during early diagenesis and traps HMs (e.g. 1.6 mg/g of As, 1.23 mg/g of Pb and 0.1 mg/g of Cr). In the estuary, HMs are accumulated in a distinct anoxic layer of sediment (e.g. 1.5 mg/g of As, 2.09 mg/g of Pb and 0.04 mg/g of Cr). Our results indicate that microbially precipitated Fe(III) minerals (identified as ferrihydrite and schwertmannite) play a key role in maintaining these divergent HM pathways and as a consequence are crucial for HM mobility in the Rio Tinto.
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Affiliation(s)
- Sergey M Abramov
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Hölderlinstrasse 12, D-72074 Tuebingen, Germany; Microbial Ecology, Center for Applied Geosciences, University of Tuebingen, Hölderlinstrasse 12, D-72074 Tuebingen, Germany.
| | - Julian Tejada
- University of Applied Forest Sciences Rottenburg, Schadenweilerhof, D-72108 Rottenburg am Neckar, Germany
| | - Lars Grimm
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Hölderlinstrasse 12, D-72074 Tuebingen, Germany
| | - Franziska Schädler
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Hölderlinstrasse 12, D-72074 Tuebingen, Germany; Microbial Ecology, Center for Applied Geosciences, University of Tuebingen, Hölderlinstrasse 12, D-72074 Tuebingen, Germany
| | - Aleksandr Bulaev
- Winogradsky Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Ave. 33, Bld 2, 119071 Moscow, Russia
| | - Elizabeth J Tomaszewski
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Hölderlinstrasse 12, D-72074 Tuebingen, Germany; Plant and Soil Sciences 250A Harker ISE Lab, University of Delaware Newark, DE 19716, USA
| | - James M Byrne
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Hölderlinstrasse 12, D-72074 Tuebingen, Germany
| | - Daniel Straub
- Microbial Ecology, Center for Applied Geosciences, University of Tuebingen, Hölderlinstrasse 12, D-72074 Tuebingen, Germany; Quantitative Biology Center (QBiC), University of Tuebingen, Auf der Morgenstelle 10, 72076 Tuebingen, Germany
| | - Harald Thorwarth
- University of Applied Forest Sciences Rottenburg, Schadenweilerhof, D-72108 Rottenburg am Neckar, Germany
| | - Ricardo Amils
- Department of Virology and Microbiology, Centre for Molecular Biology "Severo Ochoa", Autonomous University of Madrid, Calle Nicolás Cabrera 1, Cantoblanco (Campus UAM), 28049 Madrid, Spain
| | - Sara Kleindienst
- Microbial Ecology, Center for Applied Geosciences, University of Tuebingen, Hölderlinstrasse 12, D-72074 Tuebingen, Germany
| | - Andreas Kappler
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Hölderlinstrasse 12, D-72074 Tuebingen, Germany
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