1
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Li C, Wu J, Zhang D, Wang P, Zhu L, Gao Y, Wang W. Effects of Pseudomonas aeruginosa on EH40 steel corrosion in the simulated tidal zone. WATER RESEARCH 2023; 232:119708. [PMID: 36764103 DOI: 10.1016/j.watres.2023.119708] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/31/2023] [Accepted: 02/04/2023] [Indexed: 06/18/2023]
Abstract
Corrosion of metals in the tidal zone shortens the service life of facilities considerably and causes extensive economic losses each year. However, the contribution of microbiologically influenced corrosion (MIC) to this progress is usually ignored, and consequently the research on the mechanism of MIC in the tidal zone is highly desirable. In this study, the impact of the typical marine strain Pseudomonas aeruginosa on EH40 steel corrosion in the simulated tidal zone was evaluated. P. aeruginosa accelerated the corrosion of EH40 steel in the simulated tidal zone and its corrosion promotion efficiency rose over time. The environmental stress promoted the metabolism, energy production, and secretion of phenazines of P. aeruginosa, which promoted extracellular electron transfer between bacteria and steel, and accelerated MIC. The study proposes a possible mechanism of MIC in the tidal zone at the molecular biological level, which is of theoretical significance for evaluating the corrosion risks of marine equipment.
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Affiliation(s)
- Ce Li
- Key Laboratory of Marine Environmental Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China; Laoshan Laboratory, Qingdao, 266237, China; Center for Ocean Mega-Science, Chinese Academic of Sciences, Qingdao, 266071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiajia Wu
- Key Laboratory of Marine Environmental Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China; Laoshan Laboratory, Qingdao, 266237, China; Center for Ocean Mega-Science, Chinese Academic of Sciences, Qingdao, 266071, China.
| | - Dun Zhang
- Key Laboratory of Marine Environmental Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China; Laoshan Laboratory, Qingdao, 266237, China; Center for Ocean Mega-Science, Chinese Academic of Sciences, Qingdao, 266071, China.
| | - Peng Wang
- Key Laboratory of Marine Environmental Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China; Laoshan Laboratory, Qingdao, 266237, China; Center for Ocean Mega-Science, Chinese Academic of Sciences, Qingdao, 266071, China
| | - Liyang Zhu
- Key Laboratory of Marine Environmental Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China; Laoshan Laboratory, Qingdao, 266237, China; Center for Ocean Mega-Science, Chinese Academic of Sciences, Qingdao, 266071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yaohua Gao
- Key Laboratory of Marine Environmental Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China; Laoshan Laboratory, Qingdao, 266237, China; Center for Ocean Mega-Science, Chinese Academic of Sciences, Qingdao, 266071, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wenkai Wang
- Key Laboratory of Marine Environmental Corrosion and Biofouling, Institute of Oceanology, Chinese Academy of Science, Qingdao, 266071, China; Laoshan Laboratory, Qingdao, 266237, China; Center for Ocean Mega-Science, Chinese Academic of Sciences, Qingdao, 266071, China
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2
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Sengupta S, Bhowal J. Characterization of a blue-green pigment extracted from Pseudomonas aeruginosa and its application in textile and paper dyeing. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:30343-30357. [PMID: 36434448 DOI: 10.1007/s11356-022-24241-9] [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: 02/22/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
Microorganisms are a promising source of colorants with large economic potential. Owing to better bio-degradability and higher eco-compatibility, microbial pigments propose promising avenues and can thus be a smart substitute for artificial pigments. The present work focused on the screening, isolation, and extraction of a blue-green pigment produced by soil microorganisms. The pigment-producing microorganism was identified as Pseudomonas aeruginosa on the basis of standard biochemical tests and by 16S rRNA sequencing. The purified blue pigment was characterized by high-performance liquid chromatography and gas chromatography-mass spectrometry. The antimicrobial activity of the microbial biocolor (3 × 108 CFU/ml) was studied, and the zone of inhibition was found to be 10 mm, 13 mm, 9 mm, and 7 mm for E. coli, S. aureus, B. subtilis, and S. typhi, respectively. The evaluation of the biocolor as a dye was executed on different types of textiles and paper. The dyed fabrics were checked for washing, rubbing, and light and temperature fastness. Standard fabric properties of the fabrics dyed with the extracted microbial pigment were also assessed. The dyed fabrics were finally subjected to a patch test to check for any kind of allergic or hypersensitivity on human skin. The extracted pigment from Pseudomonas aeruginosa exhibited remarkable dyeing properties, indicating the scope for utilization of the pigment as a colorant on different types of textile and paper materials. The present study highlights the application of a bacterial pigment as a dyeing agent, which may raise its market value and probably replace toxic synthetic dyes due to its nontoxic nature, compatibility with various textiles, and cost-effectiveness.
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Affiliation(s)
- Sucharita Sengupta
- School of Community Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, P.O. Botanic Garden, West Bengal, Howrah, India
| | - Jayati Bhowal
- School of Community Science and Technology, Indian Institute of Engineering Science and Technology, Shibpur, P.O. Botanic Garden, West Bengal, Howrah, India.
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3
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Chromium (VI) reduction by two-chamber bioelectrochemical system with electrically conductive wall. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2022.141738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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4
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Ghaderi L, Aliahmadi A, Ebrahimi SN, Rafati H. Effective Inhibition and eradication of Pseudomonas aeruginosa biofilms by Satureja khuzistanica essential oil nanoemulsion. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2020.102260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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5
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Kaur V, Tanwar S, Kaur G, Sen T. DNA-Origami-Based Assembly of Au@Ag Nanostar Dimer Nanoantennas for Label-Free Sensing of Pyocyanin. Chemphyschem 2021; 22:160-167. [PMID: 33206442 DOI: 10.1002/cphc.202000805] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/29/2020] [Indexed: 12/31/2022]
Abstract
Early-stage detection of diseases caused by pathogens is a prerequisite for expedient patient care. Due to the limited signal-to-noise ratio, molecular diagnostics needs molecular signal amplification after recognition of the target molecule. In this present study, we demonstrate the design of plasmonically coupled bimetallic Ag coated Au nanostar dimers with controlled nanogap using rectangular DNA origami. We further report the utility of the designed nanostar dimer structures as efficient SERS substrate for the ultrasensitive and label-free detection of the pyocyanin molecule, which is a biomarker of the opportunistic pathogenic bacteria, Pseudomonas aeruginosa. The experimental results showed that the detection limit of pyocyanin with such nanoantenna based biosensor was 335 pM, which is much lower than the clinical range of detection. Thus, fast, sensitive and label-free detection of pyocyanin at ultralow concentration in an infected human body can pave a facile route for early stage warning for severe bacterial infections.
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Affiliation(s)
- Vishaldeep Kaur
- Institute of Nano Science and Technology, Phase-10, Sector-64, Mohali, Punjab, 160062, India
| | - Swati Tanwar
- Institute of Nano Science and Technology, Phase-10, Sector-64, Mohali, Punjab, 160062, India
| | - Gagandeep Kaur
- Institute of Nano Science and Technology, Phase-10, Sector-64, Mohali, Punjab, 160062, India
| | - Tapasi Sen
- Institute of Nano Science and Technology, Phase-10, Sector-64, Mohali, Punjab, 160062, India
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6
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Sheet S, Vinothkannan M, Balasubramaniam S, Subramaniyan SA, Acharya S, Lee YS. Highly Flexible Electrospun Hybrid (Polyurethane/Dextran/Pyocyanin) Membrane for Antibacterial Activity via Generation of Oxidative Stress. ACS OMEGA 2018; 3:14551-14561. [PMID: 30555979 PMCID: PMC6289494 DOI: 10.1021/acsomega.8b01607] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 10/01/2018] [Indexed: 05/31/2023]
Abstract
A hybrid nanofibrous mat consisting of polyurethane, dextran, and 10 wt % of biopigment (i.e., pyocyanin) was facilely fabricated using a direct-conventional electrospinning method. The field emission scanning electron microscopy showed the bead-free fibers with a twisted morphology for the pyocyanin-loaded mat. The addition of pyocyanin enables the unprecedented approach to tailor the hydrophilicity of hybrid mat, as verified from the water contact measurement. Thermomechanical stabilities of electrospun mats were investigated in terms of thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis. The bacterial inhibition test revealed that the antibacterial activity of electrospun mat containing pyocyanin was 98.54 and 90.2% toward Escherichia coli and Staphylococcus aureus, respectively. By the combined efforts of rapid release of pyocyanin and oxidative stress, the PU-dextran-pyocyanin (PUDP) electrospun mat significantly declined the viable cell number that disrupts the cell morphology. Hence, the proposed PUDP electrospun mat must meet the requirements of efficient antimicrobial material in various applications such as disinfectant wiping, food packaging, and textile industries.
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Affiliation(s)
- Sunirmal Sheet
- Department
of Forest Science and Technology, College of Agriculture
and Life Sciences, and Department of Animal Biotechnology, College of Agriculture
and Life Sciences, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 561-756, Jeollabuk-do, Republic of Korea
| | - Mohanraj Vinothkannan
- Graduate
School, Department of Energy Storage/Conversion Engineering, Hydrogen
and Fuel Cell Research Center, Chonbuk National
University, Jeollabuk-do 54896, Republic of Korea
| | - Saravanakumar Balasubramaniam
- Department
of Organic Materials and Fiber Engineering, Division of BIN Convergence
Technology, Chonbuk National University, Jeonju 561-756, Korea
| | - Sivakumar Allur Subramaniyan
- Department
of Forest Science and Technology, College of Agriculture
and Life Sciences, and Department of Animal Biotechnology, College of Agriculture
and Life Sciences, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 561-756, Jeollabuk-do, Republic of Korea
| | - Satabdi Acharya
- Department
of Microbiology, Panskura Banamali College, Panskura, West Bengal 721152, India
| | - Yang Soo Lee
- Department
of Forest Science and Technology, College of Agriculture
and Life Sciences, and Department of Animal Biotechnology, College of Agriculture
and Life Sciences, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 561-756, Jeollabuk-do, Republic of Korea
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7
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Enhancement of bioelectricity generation via heterologous expression of IrrE in Pseudomonas aeruginosa-inoculated MFCs. Biosens Bioelectron 2018; 117:23-31. [PMID: 29879584 DOI: 10.1016/j.bios.2018.05.052] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 02/28/2018] [Accepted: 05/28/2018] [Indexed: 01/31/2023]
Abstract
Low electricity power output (EPT) is still the main bottleneck limited the industrial application of microbial fuel cells (MFCs). Herein, EPT enhancement by introducing an exogenous global regulator IrrE derived from Deinococcus radiodurans into electrochemically active bacteria (EAB) was explored using Pseudomonas aeruginosa PAO1 as a model strain, achieving a power density 71% higher than that of the control strain. Moreover, IrrE-expressing strain exhibited a remarkable increase in the total amount of electron shuttles (majorly phenazines compounds) and a little decrease in internal resistance, which should underlie the enhancement in extracellular electron transfer (EET) efficiency and EPT. Strikingly, IrrE significantly affected substrate utilization profiling, improved cell growth characterization and cell tolerance to various stresses. Further quantitative RT-PCR analysis revealed that IrrE led to many differentially expressed genes, which were responsible for phenazines core biosynthesis, biofilm formation, QS systems, transcriptional regulation, glucose metabolism and general stress response. The results substantiated that targeting cellular regulatory network by the introduction of exogenous global regulators could be a facile and promising approach for the enhancement of bioelectricity generation and cell multiple phenotypes, and thus would be of great potential application in the practical MFCs.
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8
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Morávková Z, Stejskal J, Trchová M. Spectroscopic study of the highly homogeneous polyaniline film formation on gold support. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 152:294-303. [PMID: 26231780 DOI: 10.1016/j.saa.2015.07.075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 07/14/2015] [Accepted: 07/16/2015] [Indexed: 06/04/2023]
Abstract
The oxidation of aniline with ammonium peroxydisulfate in the aqueous solution of acetic acid has two subsequent phases: the oxidation of the neutral aniline molecules at low acidity, which was followed by the oxidation of the anilinium cations after the acidity became higher. The final polyaniline film deposited on immersed surfaces is usually contaminated with semi-crystalline oligomers which precipitated during induction period from the reaction medium. To obtain a homogeneous film, which is important in the fabrication of many molecular electronic devices, we have studied the course of aniline oxidation in a view of new experimental evidence. In the unique series of experiments, the silicon or gold supports have been immersed in the reaction mixture at crucial stages of oxidation reaction, and the deposits at the end of the reaction were analyzed. The growth of a highly homogenous film on the gold-coated glass substrate immersed in the reaction mixture at the end of the polymerization period has been observed. The molecular structure of the products was monitored with UV-visible, infrared, and Raman spectroscopies. The possible mechanism of the film formation and the molecular mechanism of the surface interaction of chemisorbed aniline oligomers with gold support are proposed.
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Affiliation(s)
- Zuzana Morávková
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Jaroslav Stejskal
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Miroslava Trchová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic.
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9
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Abstract
Certain pseudomonads are capable of producing phenazines-pigmented, reversibly redox-active metabolites that induce a variety of physiological effects on the producing organism as well as others in their vicinity. Environmental conditions and the specific physiological state of cells can dramatically affect the absolute amounts and relative proportions of the various phenazines produced. The method detailed here-high-performance liquid chromatography coupled to detection by UV-Vis absorption-can be used to separate and quantify the amount of phenazines in a Pseudomonas culture. Simple spectrophotometric measurements of filtered culture supernatants can be used to quantify certain oxidized phenazines, such as pyocyanin, in cultures. For cases where the conditions under study are not planktonic cultures (e.g., soil or biofilms) extracting the phenazines may be a necessary first step.
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Affiliation(s)
- Suzanne E Kern
- Biology Department, Massachusetts Institute of Technology, Cambridge, MA, USA
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10
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Zhou C, Li X, Gong X, Han J, Guo R. Ethanol-guided synthesis of (flower-on-leaf)-like aniline oligomers with excellent adsorption properties. NEW J CHEM 2015. [DOI: 10.1039/c5nj01828e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A novel oligoaniline with hierarchical flower-on-leaf microstructures and excellent adsorption properties has been fabricated via the oxidation of aniline in EtOH/water (3 : 7, v/v) mixtures.
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Affiliation(s)
| | - Xiaxia Li
- Testing Center
- Yangzhou University
- Yangzhou
- P. R. China
| | - Xiangxiang Gong
- Testing Center
- Yangzhou University
- Yangzhou
- P. R. China
- School of Chemistry and Chemical Engineering
| | - Jie Han
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- P. R. China
| | - Rong Guo
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- P. R. China
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11
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Seviour T, Weerachanchai P, Hinks J, Roizman D, Rice SA, Bai L, Lee JM, Kjelleberg S. Solvent optimization for bacterial extracellular matrices: a solution for the insoluble. RSC Adv 2015. [DOI: 10.1039/c4ra10930a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ionic liquids enable solvent optimization for different biofilms through solubility parameter concept.
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Affiliation(s)
- Thomas Seviour
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE)
- Nanyang Technological University
- Singapore
| | - Piyarat Weerachanchai
- Nanyang Environment and Water Research Institute (NEWRI)
- Nanyang Technological University
- Singapore
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
| | - Jamie Hinks
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE)
- Nanyang Technological University
- Singapore
| | - Dan Roizman
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE)
- Nanyang Technological University
- Singapore
| | - Scott A. Rice
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE)
- Nanyang Technological University
- Singapore
- School of Biological Sciences (SBS)
- Nanyang Technological University
| | - Linlu Bai
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore
| | - Jong-Min Lee
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore
| | - Staffan Kjelleberg
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE)
- Nanyang Technological University
- Singapore
- Centre for Marine BioInnovation and School of Biotechnology and Biomolecular Sciences
- University of New South Wales
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12
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Priyaja P, Jayesh P, Philip R, Bright Singh IS. Pyocyanin induced in vitro oxidative damage and its toxicity level in human, fish and insect cell lines for its selective biological applications. Cytotechnology 2014; 68:143-155. [PMID: 25091858 DOI: 10.1007/s10616-014-9765-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Accepted: 06/28/2014] [Indexed: 10/24/2022] Open
Abstract
Pyocyanin is a redox active phenazine pigment produced by Pseudomonas aeruginosa, with broad antibiotic activity having pharmacological, aquaculture, agriculture and industrial applications. In the present work cytotoxicity induced by pyocyanin is demonstrated in a human embryonic lung epithelial cell line (L-132), a rainbow trout gonad cell line (RTG-2) and a Spodoptera frugiperda pupal ovarian cell line (Sf9). For toxicity evaluation, cellular morphology, mitochondrial function (XTT), membrane leakage of lactate dehydrogenase, neutral red uptake, affinity of electrostatic binding of protein with sulforhodamine B dyes, glucose metabolism, and reactive oxygen species, were assessed. Results showed that higher pyocyanin concentration is required for eliciting cytotoxicity in L-132, RTG-2 and Sf9. The microscopic studies demonstrated that the cell lines exposed to pyocyanin at higher concentrations alone showed morphological changes such as clumping and necrosis. Among the three cell lines L-132 showed the highest response to pyocyanin than the others. In short, pyocyanin application at concentrations ranging from 5 to 10 mg l(-1) were not having any pathological effect in eukaryotic systems and can be used as drug of choice in aquaculture against vibrios in lieu of conventional antibiotics and as biocontrol agent against fungal and bacterial pathogens in agriculture. This is besides its industrial and pharmacological applications.
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Affiliation(s)
- P Priyaja
- National Centre for Aquatic Animal Health, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, 682016, India
| | - P Jayesh
- National Centre for Aquatic Animal Health, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, 682016, India
| | - Rosamma Philip
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, 682016, India
| | - I S Bright Singh
- National Centre for Aquatic Animal Health, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, 682016, India.
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13
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Enhancement of bioelectricity generation by cofactor manipulation in microbial fuel cell. Biosens Bioelectron 2014; 56:19-25. [PMID: 24445069 DOI: 10.1016/j.bios.2013.12.058] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 11/25/2013] [Accepted: 12/09/2013] [Indexed: 11/21/2022]
Abstract
Microbial fuel cells (MFCs) are promising for harnessing bioenergy from various organic wastes. However, low electricity power output (EPT) is one of the major bottlenecks in the practical application of MFCs. In this study, EPT improvement by cofactor manipulation was explored in the Pseudomonas aeruginosa-inoculated MFCs. By overexpression of nadE (NAD synthetase gene), the availability of the intracellular cofactor pool (NAD(H/(+))) significantly increased, and delivered approximately three times higher power output than the original strain (increased from 10.86 μW/cm(2) to 40.13 μW/cm(2)). The nadE overexpression strain showed about a onefold decrease in charge transfer resistance and higher electrochemical activity than the original strain, which should underlie the power output improvement. Furthermore, cyclic voltammetry, HPLC, and LC-MS analysis showed that the concentration of the electron shuttle (pyocyanin) increased approximately 1.5 fold upon nadE overexpression, which was responsible for the enhanced electrochemical activity. Thus, the results substantiated that the manipulation of intracellular cofactor could be an efficient approach to improve the EPT of MFCs, and implied metabolic engineering is of great potential for EPT improvement.
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14
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Yong XY, Shi DY, Chen YL, Feng J, Xu L, Zhou J, Wang SY, Yong YC, Sun YM, OuYang PK, Zheng T. Enhancement of bioelectricity generation by manipulation of the electron shuttles synthesis pathway in microbial fuel cells. BIORESOURCE TECHNOLOGY 2013; 152:220-224. [PMID: 24292201 DOI: 10.1016/j.biortech.2013.10.086] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Revised: 10/24/2013] [Accepted: 10/28/2013] [Indexed: 06/02/2023]
Abstract
Microbial fuel cells (MFCs) are promising for generating bioenergy and treating organic waste simultaneously. However, low extracellular electron transfer (EET) efficiency between electrogens and anodes remains one of the major bottlenecks in practical applications of MFCs. In this paper, pyocyanin (PYO) synthesis pathway was manipulated to improve the EET efficiency in Pseudomonas aeruginosa-inoculated MFCs. By overexpression of phzM (methyltransferase encoding gene), the maximum power density of P. aeruginosa-phzM-inoculated MFC was enhanced to 166.68 μW/cm(2), which was four folds of the original strain. In addition, the phzM overexpression strain exhibited an increase of 1.6 folds in PYO production and about a onefold decrease in the total internal resistance than the original strain, which should underlie the enhancement of the EET efficiency and the electricity power output (EPT). On the basis of these results, the manipulation of electron shuttles synthesis pathways could be an efficient approach to improve the EPT of MFCs.
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Affiliation(s)
- Xiao-Yu Yong
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210095, China; Bioenergy Research Institute, Nanjing University of Technology, Nanjing 210095, China.
| | - Dong-Yan Shi
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210095, China
| | - Yi-Lu Chen
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210095, China
| | - Jiao Feng
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210095, China
| | - Lin Xu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210095, China
| | - Jun Zhou
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210095, China; Bioenergy Research Institute, Nanjing University of Technology, Nanjing 210095, China
| | - Shu-Ya Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210095, China; Bioenergy Research Institute, Nanjing University of Technology, Nanjing 210095, China
| | - Yang-Chun Yong
- Biofuels Institute, School of the Environment, Jiangsu University, Zhenjiang 212013, China
| | - Yong-Ming Sun
- Guangzhou Institute of Energy Conversion, Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Ping-Kai OuYang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210095, China; Bioenergy Research Institute, Nanjing University of Technology, Nanjing 210095, China
| | - Tao Zheng
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210095, China; Bioenergy Research Institute, Nanjing University of Technology, Nanjing 210095, China.
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15
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Li S, Ye Q, Wang W, Hu H, Zhang X. HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY ANALYSIS OF LOMOFUNGIN IN STREPTOMYCES LOMONDENSIS. J LIQ CHROMATOGR R T 2013. [DOI: 10.1080/10826076.2012.712930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Shan Li
- a State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology , Shanghai Jiao Tong University , Shanghai , China
| | - Qiuming Ye
- a State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology , Shanghai Jiao Tong University , Shanghai , China
| | - Wei Wang
- a State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology , Shanghai Jiao Tong University , Shanghai , China
| | - Hongbo Hu
- a State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology , Shanghai Jiao Tong University , Shanghai , China
| | - Xuehong Zhang
- a State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology , Shanghai Jiao Tong University , Shanghai , China
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16
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Zhao Y, Tomšík E, Wang J, Morávková Z, Zhigunov A, Stejskal J, Trchová M. Self-Assembly of Aniline Oligomers. Chem Asian J 2012; 8:129-37. [DOI: 10.1002/asia.201200836] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 10/17/2012] [Indexed: 11/09/2022]
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17
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Stenuit B, Lamblin G, Cornelis P, Agathos SN. Aerobic denitration of 2,4,6-trinitrotoluene in the presence of phenazine compounds and reduced pyridine nucleotides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:10605-10613. [PMID: 22881832 DOI: 10.1021/es302046h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Phenazine-containing spent culture supernatants of Pseudomonas aeruginosa concentrated with a C18 solid-phase extraction cartridge initiate NAD(P)H-dependent denitration of 2,4,6-trinitrotoluene (TNT). In this study, TNT denitration was investigated under aerobic conditions using two phenazine secondary metabolites excreted by P. aeruginosa, pyocyanin (Py) and its precursor phenazine-1- carboxylic acid (PCA), and two chemically synthesized pyocyanin analogs, phenazine methosulfate (PMS+) and phenazine ethosulfate (PES+). The biomimetic Py/NAD(P)H/O2 system was characterized and found to extensively denitrate TNT in unbuffered aqueous solution with minor production of toxic amino aromatic derivatives. To a much lesser extent, TNT denitration was also observed with PMS+ and PES+ in the presence of NAD(P)H. No TNT denitration was detected with the biomimetic PCA/NAD(P)H/O2 system. Electron paramagnetic resonance (EPR) spectroscopy analysis of the biomimetic Py/NAD(P)H/O2 system revealed the generation of superoxide radical anions (O2 •−). In vitro TNT degradation experiments in the presence of specific inhibitors of reactive oxygen species suggest a nucleophilic attack of superoxide radical anion followed by TNT denitration through an as yet unknown mechanism. The results of this research confirm the high functional versatility of the redox-active metabolite pyocyanin and the susceptibility of aromatic compounds bearing electron withdrawing substituents, such as nitro groups, to superoxide-driven nucleophilic attack.
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Affiliation(s)
- Ben Stenuit
- Earth and Life Institute, Laboratory of Bioengineering, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
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Interkingdom metabolic transformations captured by microbial imaging mass spectrometry. Proc Natl Acad Sci U S A 2012; 109:13811-6. [PMID: 22869730 DOI: 10.1073/pnas.1206855109] [Citation(s) in RCA: 187] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In polymicrobial infections, microbes can interact with both the host immune system and one another through direct contact or the secretion of metabolites, affecting disease progression and treatment options. The thick mucus in the lungs of patients with cystic fibrosis is highly susceptible to polymicrobial infections by opportunistic pathogens, including the bacterium Pseudomonas aeruginosa and the fungus Aspergillus fumigatus. Unravelling the hidden molecular interactions within such polymicrobial communities and their metabolic exchange processes will require effective enabling technologies applied to model systems. In the present study, MALDI-TOF and MALDI-FT-ICR imaging mass spectrometry (MALDI-IMS) combined with MS/MS networking were used to provide insight into the interkingdom interaction between P. aeruginosa and A. fumigatus at the molecular level. The combination of these technologies enabled the visualization and identification of metabolites secreted by these microorganisms grown on agar. A complex molecular interplay was revealed involving suppression, increased production, and biotransformation of a range of metabolites. Of particular interest is the observation that P. aeruginosa phenazine metabolites were converted by A. fumigatus into other chemical entities with alternative properties, including enhanced toxicities and the ability to induce fungal siderophores. This work highlights the capabilities of MALDI-IMS and MS/MS network analysis to study interkingdom interactions and provides insight into the complex nature of polymicrobial metabolic exchange and biotransformations.
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Yong YC, Yu YY, Li CM, Zhong JJ, Song H. Bioelectricity enhancement via overexpression of quorum sensing system in Pseudomonas aeruginosa-inoculated microbial fuel cells. Biosens Bioelectron 2011; 30:87-92. [DOI: 10.1016/j.bios.2011.08.032] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 08/23/2011] [Accepted: 08/25/2011] [Indexed: 01/22/2023]
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Shao J, Fan LY, Zhang W, Guo CG, Li S, Xu YQ, Cao CX. Purification of low-concentration phenazine-1-carboxylic acid from fermentation broth of Pseudomonas sp. M18 via free flow electrophoresis with gratis gravity. Electrophoresis 2010; 31:3499-507. [DOI: 10.1002/elps.201000213] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Ding Z, Sanchez T, Labouriau A, Iyer S, Larson T, Currier R, Zhao Y, Yang D. Characterization of Reaction Intermediate Aggregates in Aniline Oxidative Polymerization at Low Proton Concentration. J Phys Chem B 2010; 114:10337-46. [DOI: 10.1021/jp102623z] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhongfen Ding
- Materials Physics and Applications Division, Bioscience Division, Materials Science and Technology Division, Earth and Environmental Science Division, Chemistry Division, and Los Alamos Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Timothy Sanchez
- Materials Physics and Applications Division, Bioscience Division, Materials Science and Technology Division, Earth and Environmental Science Division, Chemistry Division, and Los Alamos Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Andrea Labouriau
- Materials Physics and Applications Division, Bioscience Division, Materials Science and Technology Division, Earth and Environmental Science Division, Chemistry Division, and Los Alamos Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Srinivas Iyer
- Materials Physics and Applications Division, Bioscience Division, Materials Science and Technology Division, Earth and Environmental Science Division, Chemistry Division, and Los Alamos Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Toti Larson
- Materials Physics and Applications Division, Bioscience Division, Materials Science and Technology Division, Earth and Environmental Science Division, Chemistry Division, and Los Alamos Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Robert Currier
- Materials Physics and Applications Division, Bioscience Division, Materials Science and Technology Division, Earth and Environmental Science Division, Chemistry Division, and Los Alamos Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Yusheng Zhao
- Materials Physics and Applications Division, Bioscience Division, Materials Science and Technology Division, Earth and Environmental Science Division, Chemistry Division, and Los Alamos Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Dali Yang
- Materials Physics and Applications Division, Bioscience Division, Materials Science and Technology Division, Earth and Environmental Science Division, Chemistry Division, and Los Alamos Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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Gao B, Peng H, Wang W, Xu Y, Zhang X. Determination of a Novel Fungicide Phenazine-1-Carboxylic Acid in Soil Samples Using Sample Stacking Capillary Electrophoresis Combined with Solid Phase Extraction. ANAL LETT 2010. [DOI: 10.1080/00032710903502124] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kim JB, Cho KS, Jeong SK, Nam SW, Jeong HD, Kim JK. Identification and characterization of a pigment-producing denitrifying bacterium. BIOTECHNOL BIOPROC E 2008. [DOI: 10.1007/s12257-007-0201-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Perneel M, D'hondt L, De Maeyer K, Adiobo A, Rabaey K, Höfte M. Phenazines and biosurfactants interact in the biological control of soil-borne diseases caused by Pythium spp. Environ Microbiol 2008; 10:778-88. [PMID: 18237310 DOI: 10.1111/j.1462-2920.2007.01501.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
In this study, the putative role of phenazines and rhamnolipid-biosurfactants, antagonistic metabolites produced by Pseudomonas aeruginosa PNA1, was tested in the biological control of Pythium splendens on bean (Phaseolus vulgaris L) and Pythium myriotylum on cocoyam (Xanthosoma sagittifolium L Schott). A rhamnolipid-deficient and a phenazine-deficient mutant of PNA1 were used either separately or jointly in plant experiments. When the mutants were applied separately, no disease-suppressive effect was observed, although both mutants still produced one of the antagonistic compounds (phenazines or rhamnolipids). When the mutants were concurrently introduced in the soil, the biocontrol activity was restored to wild-type levels. Bean seeds developed significantly less pre-emergence damping-off caused by P. splendens when treated with a mixture of purified phenazine-1-carboxamide and rhamnolipids than with any of the chemicals alone. When phenazines and rhamnolipids were combined at concentrations that had no observable effects when the metabolites were applied separately, mycelial growth of P. myriotylum was significantly reduced. In addition, microscopic analysis revealed substantial vacuolization and disintegration of Pythium hyphae after incubation in liquid medium amended with both metabolites. Results of this study indicate that phenazines and biosurfactants are acting synergistically in the control of Pythium spp.
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Affiliation(s)
- Maaike Perneel
- Department of Crop Protection, Laboratory of Phytopathology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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Pham TH, Boon N, Aelterman P, Clauwaert P, De Schamphelaire L, Vanhaecke L, De Maeyer K, Höfte M, Verstraete W, Rabaey K. Metabolites produced by Pseudomonas sp. enable a Gram-positive bacterium to achieve extracellular electron transfer. Appl Microbiol Biotechnol 2008; 77:1119-29. [DOI: 10.1007/s00253-007-1248-6] [Citation(s) in RCA: 223] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2007] [Revised: 10/09/2007] [Accepted: 10/10/2007] [Indexed: 11/30/2022]
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Gomes JRB, Sousa EA, Gonçalves JM, Monte MJS, Gomes P, Pandey S, Acree WE, Ribeiro da Silva MDMC. Energetics of the N−O Bonds in 2-Hydroxyphenazine-di-N-oxide. J Phys Chem B 2005; 109:16188-95. [PMID: 16853057 DOI: 10.1021/jp051350g] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The standard enthalpy of formation and the enthalpy of sublimation of crystalline 2-hydroxyphenazine-di-N-oxide, at T = 298.15 K, were determined from isoperibol static bomb combustion calorimetry and from Knudsen effusion experiments, as -76.7 +/- 4.2 kJ.mol(-1) and 197 +/- 5 kJ.mol(-1), respectively. The sum of these two quantities gives the standard enthalpy of formation in the gas-phase for this compound, delta(f)H(m)degrees(g) = 120 +/- 6 kJ.mol(-1). This value was combined with the gas-phase standard enthalpy of formation for 2-hydroxyphenazine retrieved from a group estimative method yielding the mean (N-O) bond dissociation enthalpy, in the gas-phase, for 2-hydroxyphenazine-di-N-oxide. The result obtained with this strategy is (DH(m)degrees (N - O)) = 263 +/- 4 kJ.mol(-1), which is in excellent agreement with the B3LYP/6-311+G(2d,2p)//B3LYP/6-31G(d) computed value, 265 kJ.mol(-1).
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Affiliation(s)
- José R B Gomes
- Centro de Investigação em Química, Department of Chemistry, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007, Porto, Portugal
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Rabaey K, Boon N, Höfte M, Verstraete W. Microbial phenazine production enhances electron transfer in biofuel cells. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2005; 39:3401-8. [PMID: 15926596 DOI: 10.1021/es048563o] [Citation(s) in RCA: 482] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
High-rate electron transfer toward an anode in microbial fuel cells (MFCs) has thus far not been described for bacteria-producing soluble redox mediators. To studythe mechanism of electron transfer, we used a MFC isolate, Pseudomonas aeruginosa strain KRP1. Bacterial electron transfer toward the MFC anode was enabled through pyocyanin and phenazine-1-carboxamide. The presence of the anode stimulated pyocyanin production. Mutant strains, deficient in the synthesis of pyocyanin and phenazine-1-carboxamide, were unable to achieve substantial electron transfer and reached only 5% of the wild type's power output. Upon pyocyanin addition, the power output was restored to 50%. Pyocyanin was not only used by P. aeruginosa to improve electron transfer but as well enhanced electron transfer by other bacterial species. The finding that one bacterium can produce electron shuttles, which can be used also by other bacteria, to enhance electron-transfer rate and growth, has not been shown before. These findings have considerable implications with respect to the power output attainable in MFCs.
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Affiliation(s)
- Korneel Rabaey
- Laboratory of Microbial Ecology and Technology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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Norman RS, Moeller P, McDonald TJ, Morris PJ. Effect of pyocyanin on a crude-oil-degrading microbial community. Appl Environ Microbiol 2004; 70:4004-11. [PMID: 15240276 PMCID: PMC444818 DOI: 10.1128/aem.70.7.4004-4011.2004] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Pseudomonas aeruginosa is an n-alkane degrader that is frequently isolated from petroleum-contaminated sites and produces factors that enhance its competitiveness and survival in many environments. In this study, one such factor, pyocyanin, has been detected in an oil-degrading culture containing P. aeruginosa and is a redox-active compound capable of inhibiting microbial growth. To examine the effects of pyocyanin further, an oil-degrading culture was grown with and without 9.5 microM pyocyanin and microbial community structure and oil degradation were monitored for 50 days. Denaturing gradient gel electrophoresis (DGGE) analysis of cultures revealed a decrease in the microbial community diversity in the pyocyanin-amended cultures compared to that of the unamended cultures. Two members of the microbial community in pure culture exhibited intermediate and high sensitivities to pyocyanin corresponding to intermediate and low levels of activity for the antioxidant enzymes catalase and superoxide dismutase, respectively. Another member of the community that remained constant in the DGGE gels over the 50-day culture incubation period exhibited no sensitivity to pyocyanin, corresponding to a high level of catalase and superoxide dismutase when examined in pure culture. Pyocyanin also affected the overall degradation of the crude oil. At 50 days, the culture without pyocyanin had decreased polycyclic aromatic hydrocarbons compared to the pyocyanin-amended culture, with a specific reduction in the degradation of dibenzothiophenes, naphthalenes, and C(29) and C(30) hopanes. This study demonstrated that pyocyanin influenced the diversity of the microbial community and suggests the importance of understanding how interspecies interactions influence the degradation capability of a microbial community.
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Affiliation(s)
- R Sean Norman
- Marine Biomedicine and Environmental Sciences, Medical University of South Carolina, 221 Fort Johnson Rd., Charleston, SC 29412, USA
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Bolwerk A, Lagopodi AL, Wijfjes AHM, Lamers GEM, Chin-A-Woeng TFC, Lugtenberg BJJ, Bloemberg GV. Interactions in the tomato rhizosphere of two Pseudomonas biocontrol strains with the phytopathogenic fungus Fusarium oxysporum f. sp. radicis-lycopersici. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2003; 16:983-993. [PMID: 14601666 DOI: 10.1094/mpmi.2003.16.11.983] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The fungus Fusarium oxysporum f. sp. radicis-lycopersici causes foot and root rot of tomato plants, which can be controlled by the bacteria Pseudomonas fluorescens WCS365 and P. chlororaphis PCL1391. Induced systemic resistance is thought to be involved in biocontrol by P. fluorescens WCS365. The antifungal metabolite phenazine-1-carboxamide (PCN), as well as efficient root colonization, are essential in the mechanism of biocontrol by P. chlororaphis PCL1391. To understand the effects of bacterial strains WCS365 and PCL1391 on the fungus in the tomato rhizosphere, microscopic analyses were performed using different autofluorescent proteins as markers. Tomato seedlings were inoculated with biocontrol bacteria and planted in an F. oxysporum f. sp. radicis-lycopersici-infested gnotobiotic sand system. Confocal laser scanning microscope analyses of the interactions in the tomato rhizosphere revealed that i) the microbes effectively compete for the same niche, and presumably also for root exudate nutrients; ii) the presence of either of the two bacteria negatively affects infection of the tomato root by the fungus; iii) both biocontrol bacteria colonize the hyphae extensively, which may represent a new mechanism in biocontrol by these pseudomonads; and iv) the production of PCN by P. chlororaphis PCL1391 negatively affects hyphal growth and branching, which presumably affects the colonization and infecting ability of the fungus.
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Affiliation(s)
- Annouschka Bolwerk
- Leiden University, Institute of Molecular Plant Sciences, Clusius Laboratory, Wassenaarseweg 64, 2333 AL Leiden, The Netherlands
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Burgess JG, Boyd KG, Armstrong E, Jiang Z, Yan L, Berggren M, May U, Pisacane T, Granmo A, Adams DR. The development of a marine natural product-based antifouling paint. BIOFOULING 2003; 19 Suppl:197-205. [PMID: 14618721 DOI: 10.1080/0892701031000061778] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Problems with tin and copper antifouling compounds have highlighted the need to develop new environmentally friendly antifouling coatings. Bacteria isolated from living surfaces in the marine environment are a promising source of natural antifouling compounds. Four isolates were used to produce extracts that were formulated into ten water-based paints. All but one of the paints showed activity against a test panel of fouling bacteria. Five of the paints were further tested for their ability to inhibit the settlement of barnacle larvae, Balanus amphitrite, and algal spores of Ulva lactuca, and for their ability to inhibit the growth of U. lactuca. Two paints caused a significant decrease in the number of settled barnacles. One paint containing extract of Pseudomonas sp. strain NUDMB50-11, showed excellent activity in all assays. The antifouling chemicals responsible for the activity of the extract were isolated, using bioassay guided fractionation, and their chemical structures determined.
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Affiliation(s)
- J Grant Burgess
- School of Life Sciences, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, UK.
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Chin-A-Woeng TFC, Bloemberg GV, Lugtenberg BJJ. Phenazines and their role in biocontrol by Pseudomonas bacteria. THE NEW PHYTOLOGIST 2003; 157:503-523. [PMID: 33873412 DOI: 10.1046/j.1469-8137.2003.00686.x] [Citation(s) in RCA: 159] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Various rhizosphere bacteria are potential (micro)biological pesticides which are able to protect plants against diseases and improve plant yield. Knowledge of the molecular mechanisms that govern these beneficial plant-microbe interactions enables optimization, enhancement and identification of potential synergistic effects in plant protection. The production of antifungal metabolites, induction of systemic resistance, and the ability to compete efficiently with other resident rhizobacteria are considered to be important prerequisites for the optimal performance of biocontrol agents. Intriguing aspects in the molecular mechanisms of these processes have been discovered recently. Phenazines and phloroglucinols are major determinants of biological control of soilborne plant pathogens by various strains of fluorescent Pseudomonas spp. This review focuses on the current state of knowledge on biocontrol by phenazine-producing Pseudomonas strains and the action, biosynthesis, and regulation mechanisms of the production of microbial phenazines.
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Affiliation(s)
| | - Guido V Bloemberg
- Institute of Molecular Plant Sciences, Leiden University, The Netherlands
| | - Ben J J Lugtenberg
- Institute of Molecular Plant Sciences, Leiden University, The Netherlands
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Chin-A-Woeng TF, Thomas-Oates JE, Lugtenberg BJ, Bloemberg GV. Introduction of the phzH gene of Pseudomonas chlororaphis PCL1391 extends the range of biocontrol ability of phenazine-1-carboxylic acid-producing Pseudomonas spp. strains. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2001; 14:1006-1015. [PMID: 11497461 DOI: 10.1094/mpmi.2001.14.8.1006] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Pseudomonas chlororaphis PCL1391 controls tomato foot and root rot caused by Fusarium oxysporum f. sp. radicis-lycopersici. Its biocontrol activity is mediated by the production of phenazine-1-carboxamide (PCN). In contrast, the take-all biocontrol strains P. fluorescens 2-79 and P. aureofaciens 30-84, which produce phenazine-1-carboxylic acid (PCA), do not control this disease. To determine the role of the amide group in biocontrol, the PCN biosynthetic genes of strain PCL1391 were identified and characterized. Downstream of phzA through phzG, the novel phenazine biosynthetic gene phzH was identified and shown to be required for the presence of the 1-carboxamide group of PCN because a phzH mutant of strain PCL1391 accumulated PCA. The deduced PhzH protein shows homology with asparagine synthetases that belong to the class II glutamine amidotransferases, indicating that the conversion of PCA to PCN occurs via a transamidase reaction catalyzed by PhzH. Mutation of phzH caused loss of biocontrol activity, showing that the 1-carboxamide group of PCN is crucial for control of tomato foot and root rot. PCN production and biocontrol activity of the mutant were restored by complementing the phzH gene in trans. Moreover, transfer of phzH under control of the tac promoter to the PCA-producing biocontrol strains P. fluorescens 2-79 and P. aureofaciens 30-84 enabled these strains to produce PCN instead of PCA and suppress tomato foot and root rot. Thus, we have shown, for what we believe is the first time, that the introduction of a single gene can efficiently extend the range of the biocontrol ability of bacterial strains.
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Affiliation(s)
- T F Chin-A-Woeng
- Leiden University, Institute of Molecular Plant Sciences, The Netherlands.
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Fernández RO, Pizarro RA. Pseudomonas aeruginosa UV-A-induced lethal effect: influence of salts, nutritional stress and pyocyanine. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 1999; 50:59-65. [PMID: 10443032 DOI: 10.1016/s1011-1344(99)00071-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The presence of NaCl in plating media shows an important protection against the Pseudomonas aeruginosa UV-A-induced lethal effect, contrasting with the known sensitizing action of salts on UV-A-irradiated Escherichia coli cells. MgSO4 exhibits a similar protection, but lower concentrations than for NaCl are needed to achieve the same effect. NaCl protection from lethal effects involves an osmotic mechanism, while MgSO4 could act by a different process. On the other hand, when cells grown in a complete medium are then incubated for 20 min in a synthetic medium and irradiated with UV-A, a very marked protection is obtained. This protection is dependent on protein synthesis, since treatment with tetracycline, during the nutritional stress, blocks its induction. These results offer a new example of cross-protection among different stressing agents. In our experimental conditions, natural phenazines of P. aeruginosa are not present in the cells, ruling out the possibility that these pigments act as photosensitizers. Conversely, pyocyanine (the major phenazine produced by this microorganism) prevents the UV-A killing effect in a concentration-dependent way when present in the irradiation media. Finally, UV-A irradiation induces, as in E. coli, the accumulation of guanosine tetraphosphate and guanosine pentaphosphate, although the physiological meaning of this finding has yet to be determined.
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Affiliation(s)
- R O Fernández
- Departamento de Radiobiología, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina.
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Chin-A-Woeng TFC, Bloemberg GV, van der Bij AJ, van der Drift KMGM, Schripsema J, Kroon B, Scheffer RJ, Keel C, Bakker PAHM, Tichy HV, de Bruijn FJ, Thomas-Oates JE, Lugtenberg BJJ. Biocontrol by Phenazine-1-carboxamide-Producing Pseudomonas chlororaphis PCL1391 of Tomato Root Rot Caused by Fusarium oxysporum f. sp. radicis-lycopersici. MOLECULAR PLANT-MICROBE INTERACTIONS® 1998; 11:1069-1077. [PMID: 0 DOI: 10.1094/mpmi.1998.11.11.1069] [Citation(s) in RCA: 161] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Seventy bacterial isolates from the rhizosphere of tomato were screened for antagonistic activity against the tomato foot and root rot-causing fungal pathogen Fusarium oxysporum f. sp. radicis-lycopersici. One isolate, strain PCL1391, appeared to be an efficient colonizer of tomato roots and an excellent biocontrol strain in an F. oxysporum/tomato test system. Strain PCL1391 was identified as Pseudomonas chlororaphis and further characterization showed that it produces a broad spectrum of antifungal factors (AFFs), including a hydrophobic compound, hydrogen cyanide, chitinase(s), and protease(s). Through mass spectrometry and nuclear magnetic resonance, the hydrophobic compound was identified as phenazine-1-carboxamide (PCN). We have studied the production and action of this AFF both in vitro and in vivo. Using a PCL1391 transposon mutant, with a lux reporter gene inserted in the phenazine biosynthetic operon (phz), we showed that this phenazine biosynthetic mutant was substantially decreased in both in vitro antifungal activity and biocontrol activity. Moreover, with the same mutant it was shown that the phz biosynthetic operon is expressed in the tomato rhizosphere. Comparison of the biocontrol activity of the PCN-producing strain PCL1391 with those of phenazine-1-carboxylic acid (PCA)-producing strains P. fluorescens 2-79 and P. aureofaciens 30-84 showed that the PCN-producing strain is able to suppress disease in the tomato/F. oxysporum system, whereas the PCA-producing strains are not. Comparison of in vitro antifungal activity of PCN and PCA showed that the antifungal activity of PCN was at least 10 times higher at neutral pH, suggesting that this may contribute to the superior biocontrol performance of strain PCL1391 in the tomato/F. oxysporum system.
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