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Article
Specific Response of Bacterial Cells to the Action of β-Ionone
The biological activity and mechanisms of action of the unsaturated ketone β-ionone, a volatile compound of serious interest for biotechnology, medicine, and agriculture, have been studied. Using specific lux-bio...
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Article
Modulation of Arabidopsis thaliana growth by volatile substances emitted by Pseudomonas and Serratia strains
Many volatile compounds secreted by bacteria play an important role in the interactions of microorganisms, can inhibit the growth of phytopathogenic bacteria and fungi, can suppress or stimulate plant growth a...
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Article
Peculiarities of the SprIR Quorum Sensing System of Serratia proteamaculans 94 and Its Involvement in Regulation of Cellular Processes
The quorum sensing (QS) system SprIR of the psychrotrophic strain Serratia proteamaculans 94 was investigated. A mutant was constructed with the inactivated sprR gene encoding the regulatory receptor protein SprR...
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Article
Effects of Volatile Organic Compounds Synthesized by Bacteria on the Expression from Promoters of the zntA, copA, and arsR Genes Induced in Response to Copper, Zinc, and Arsenic
Heavy metals and arsenic are environmental pollutants and have a negative effect on human health. Volatile organic compounds (VOCs) synthesized by bacteria are able to modulate the growth and metabolism of pro...
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Article
Plant-Microbial Interactions Involving Quorum Sensing Regulation
Quorum Sensing (QS) is a mechanism of bacterial intercellular communication that depends on their population density. QS activates the expression of hundreds of bacterial genes, many of which play an important...
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Article
Effect of inactivation of luxS gene on the properties of Serratia proteamaculans 94 strain
The luxS gene is responsible for the synthesis of AI-2 (autoinducer-2), a signaling molecule that participates in quorum sensing regulation in a large number of bacteria. In this work, we investigated which pheno...
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Article
Volatile Compounds of Bacterial Origin: Structure, Biosynthesis, and Biological Activity
Microorganisms produce various volatile compounds, including volatile organic compounds and complex combinations of volatile compounds. The ecological and functional role of these compounds is presently the su...
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Article
Synthesis of Silver Nanoparticles with the use of Herbaceous Plant Extracts and Effect of Nanoparticles on Bacteria
The screening of aqueous extracts of herbaceous plants that grow on the territory of the Russian Federation with their subsequent use for the biosynthesis of silver nanoparticles (SNPs) in accordance with the ...
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Article
Visualization of the spatial distribution of Ag ions in cyanobacteria Anabaena sp. PCC 7120 by time-of-flight secondary ion mass spectrometry and two-photon luminescence microscopy
Cyanobacteria Anabaena sp. PCC 7120 have been analyzed by time-of-flight secondary ion mass spectrometry and two-photon luminescence microscopy. The reduction of Ag+ ions to silver nanoparticles inside the cells ...
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Article
Production of gold nanoparticles by biogenesis using bacteria
Diazotrophic cyanobacteria Anabaena sp. PCC 7120, four Nostoc strains, and two Azotobacter species (A. vinelandii and A. chroococcum) were found to produce gold nanoparticles (GNP) under nitrogen fixation conditi...
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Article
The effect of introduction of the Heterologous gene encoding the N-acyl-homoserine lactonase (aiiA) on the properties of Burkholderia cenocepacia 370
To study the role of Quorum Sensing (QS) regulation in the control of the cellular processes of Burkholderia cenocepacia 370, plasmid pME6863 was transferred into its cells. The plasmid contains a heterologous ge...
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Article
Regulation of biofilm formation by Pseudomonas chlororaphis in an in vitro system
The mutants of Pseudomonas chlororaphis 449 with completely or partially suppressed accumulation of N-acyl homoserine lactones exhibited the absence or a pronounced decrease of their capacity for stimulation of b...
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Article
The ability of natural ketones to interact with bacterial quorum sensing systems
The effect of natural ketones emitted by bacteria (2-nonanone, 2-heptanone, and 2-undecanone) on the functioning of the Quorum Sensing (QS) systems was studied. In this work, three lux-reporter strains contain...
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Article
Quorum sensing regulation in bacteria of the family enterobacteriaceae
Bacteria are able to sense an increase in population density and can respond to it by coordinated regulation of the expression of certain sets of genes in the total population of bacteria. This specific mode o...
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Article
Effect of salicylic, indole-3-acetic, gibberellic, and abscisic acids on biofilm formation by Agrobacterium tumefaciens C58 and Pseudomonas aeruginosa PAO1
In this work, we have shown that salicylic, indole-3-acetic, gibberellic, and abscisic acids at subinhibitory concentrations or concentrations that have a low inhibitory effect on bacterial growth stimulate bi...
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Article
Formation of Pseudomonas aeruginosa PAO1 biofilms in the presence of hydrogen peroxide. The effect of the aiiA gene
In natural ecosystems, most bacteria exist as specifically organized biofilms attached to various surfaces; the biofilms have a complex architecture and are surrounded by an exopolymeric matrix. The bacteria i...
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Article
Mutants of Burkholderia cenocepacia with a change in synthesis of N-acyl-homoserine lactones—Signal molecules of quorum sensing regulation
By means of plasposon mutagenesis, mutants of Burkholderia cenocepacia 370 with the change in production of N-acyl-homoserine lactones (AHL), signal molecules of the Quorum Sensing system of regulation, were obta...
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Article
Femtosecond optoperforation of the cell wall of cyanobacterium Anabaena sp. PCC 7120 in the presence of gold nanoparticles
In this paper, the results of experiments on the optoperforation of cyanobacterium Anabaena sp. PCC 7120 in the presence of gold nanoparticles are presented. The experiment consisted of the effect that focused fe...
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Article
Biofilms of Burkholderia cepacia: Characteristics of mutants with modified formation capacity
The bacteria Burkholderia cenocepacia, which cause pulmonary infections in people with low immunity and in children with inherited diseases such as cystic fibrosis, were studied. The virulence of these bacteria i...
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Article
Activation of bioluminescence of sensor Escherichia coli srains used to detect N-acyl-homoserine lactones in presence of nitrofurans and NO generators
Nitrofurans (nitrofurazone, nitrofurantoin, furazidin, nifuroxazide) and nitric oxide generators (sodium nitroprusside and isosorbide mononitrate) in subinhibitory concentrations were shown to significantly in...
