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Kamnev AA, Dyatlova YA, Kenzhegulov OA, Fedonenko YP, Evstigneeva SS, Tugarova AV. Fourier Transform Infrared (FTIR) Spectroscopic Study of Biofilms Formed by the Rhizobacterium Azospirillum baldaniorum Sp245: Aspects of Methodology and Matrix Composition. Molecules 2023; 28:molecules28041949. [PMID: 36838937 PMCID: PMC9962177 DOI: 10.3390/molecules28041949] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/14/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023] Open
Abstract
Biofilms represent the main mode of existence of bacteria and play very significant roles in many industrial, medical and agricultural fields. Analysis of biofilms is a challenging task owing to their sophisticated composition, heterogeneity and variability. In this study, biofilms formed by the rhizobacterium Azospirillum baldaniorum (strain Sp245), isolated biofilm matrix and its macrocomponents have for the first time been studied in detail, using Fourier transform infrared (FTIR) spectroscopy, with a special emphasis on the methodology. The accompanying novel data of comparative chemical analyses of the biofilm matrix, its fractions and lipopolysaccharide isolated from the outer membrane of the cells of this strain, as well as their electrophoretic analyses (SDS-PAGE) have been found to be in good agreement with the FTIR spectroscopic results.
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Polar flagellum of the alphaproteobacterium Azospirillum brasilense Sp245 plays a role in biofilm biomass accumulation and in biofilm maintenance under stationary and dynamic conditions. World J Microbiol Biotechnol 2019; 35:19. [PMID: 30656428 DOI: 10.1007/s11274-019-2594-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 01/11/2019] [Indexed: 10/27/2022]
Abstract
Bacteria Azospirillum brasilense may swim and swarm owing to the rotation of a constitutive polar flagellum (Fla) and inducible lateral flagella (Laf). They also construct sessile biofilms on various interfaces. As compared to the wild-type strain Sp245, the previously characterized Fla- Laf- flhB1 mutant Sp245.1063 accumulated less biomass in mature biofilms, which also were susceptible to the forces of hydrodynamic shear. In this study, we compared biofilms formed by strain Sp245 and its previously constructed derivatives on the interfaces between a minimal (malate-salt medium, or MSM) or rich (LB) liquid growth medium and a hydrophilic (glass) or hydrophobic (polystyrene) solid surface under static or dynamic conditions. In all experimental settings, the alterations in Sp245.1063's mature biofilm traits were partially (in MSM) or completely (in LB) rescued in the complemented mutant Sp245.1063 (pRK415-150177), which received the pRK415-borne coding sequence for the putative FlhB1 protein of the flagellar type III secretion system. Although Laf were not found in the biofilms of azospirilla, Fla was present on the biofilm cells of the complemented mutant Sp245.1063 (pRK415-150177) and other studied strains, which had normal flagellation on liquid and solid nutritional media. Accordingly, mature biofilms of these strains contained more biomass and were significantly more resistant to shaking at 140 rpm, as compared to the biofilms of the flagella-free mutant bacteria. These data proved that the polar flagellum of A. brasilense Sp245 plays a significant positive role in biofilm biomass increase and in biofilm stabilization.
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Shelud'ko AV, Filip'echeva YA, Telesheva EM, Yevstigneyeva SS, Petrova LP, Katsy EI. Restoration of polar-flagellum motility and biofilm-forming capacity in the mmsB1 mutant of the alphaproteobacterium Azospirillum brasilense Sp245 points to a new role for a homologue of 3-hydroxyisobutyrate dehydrogenase. Can J Microbiol 2018; 65:144-154. [PMID: 30336067 DOI: 10.1139/cjm-2018-0481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The bacterium Azospirillum brasilense can swim and swarm owing to the rotation of a constitutive polar flagellum (Fla) and inducible lateral flagella, respectively. They also form biofilms on various interfaces. Experimental data on flagellar assembly and social behaviours in these bacteria are scarce. Here, for the first time, the chromosomal coding sequence mmsB1 for a homologue of 3-hydroxyisobutyrate dehydrogenase (protein accession Nos. ADT80774 and E7CWE2) was shown to play a role in the assembly of motile Fla and in biofilm biomass accumulation. In the previously obtained mutant SK039 of A. brasilense Sp245, an Omegon-Km insertion in mmsB1 was concurrent with changes in cell-surface properties and with suppression of Fla assembly (partial) and Fla-dependent motility (complete). Here, the immotile leaky Fla- mutant SK039 was complemented with the expression vector pRK415-borne mmsB1 gene of Sp245. In the complemented mutant, the elevated relative cell hydrophobicity and changed relative membrane fluidity of SK039 returned to the wild-type levels; also, biofilm biomass accumulation increased and even reached Sp245's levels under nutritionally rich conditions. In strain SK039 (pRK415-mmsB1), the percentage of cells with Fla became significantly higher than that in mutant SK039, and the Fla-driven swimming velocity was equal to that in strain Sp245.
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Affiliation(s)
- Andrei V Shelud'ko
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia.,Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia
| | - Yulia A Filip'echeva
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia.,Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia
| | - Elizaveta M Telesheva
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia.,Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia
| | - Stella S Yevstigneyeva
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia.,Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia
| | - Lilia P Petrova
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia.,Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia
| | - Elena I Katsy
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia.,Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov, 13, 410049 Saratov, Russia
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Shelud’ko AV, Filip’echeva YA, Telesheva EM, Burov AM, Evstigneeva SS, Burygin GL, Petrova LP. Characterization of Carbohydrate-Containing Components of Azospirillum brasilense Sp245 Biofilms. Microbiology (Reading) 2018. [DOI: 10.1134/s0026261718050156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Ponomareva EG, Kupryashina MA, Shelud’ko AV, Petrova LP, Vetchinkina EP, Katsy EI, Nikitina VE. Phenol Oxidase Activity of Azospirillum brasilense Sp245 Mutants with Modified Motility and Azospirillum brasilense Sp7 Phase Variants with Different Plasmid Composition. Microbiology (Reading) 2018. [DOI: 10.1134/s0026261718020091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Tugarova AV, Scheludko AV, Dyatlova YA, Filip'echeva YA, Kamnev AA. FTIR spectroscopic study of biofilms formed by the rhizobacterium Azospirillum brasilense Sp245 and its mutant Azospirillum brasilense Sp245.1610. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.12.063] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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