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[Effect of plasmids from various incompatibility groups on the development of bacteriophages specific to Pseudomonas
Abstract:
The aim of this work was to study the effect of plasmids belonging to different incompatibility groups on the growth of bacteriophages in Pseudomonas aeruginosa and Pseudomonas putida strains. The growth of bacteriophages was shown to be limited most often due to the presence in cells of plasmids belonging to the P-2 incompatibility group. Plasmids of the Inc P-2 group differed from one another in the spectrum of bacteriophages whose growth they limited. Phages whose growth was suppressed in strains containing plasmids of the P-5, P-9 or P-10 incompatibility groups were found. Some plasmids showed no specific interaction with bacteriophages. The plasmids investigated differed in the studied trait in P. aeruginosa and P. putida cells. In contrast to P. aeruginosa PAO, P. putida PpGI plasmid containing cells did not maintain the growth of donor-specific bacteriophages and, to a lesser degree, limited the growth of phages specific for P. putida PpGI.
Insights
Plasmids, particularly those in the P-2 incompatibility group, frequently inhibit bacteriophage growth in Pseudomonas strains. Different plasmid groups affect specific bacteriophages, with variations observed between Pseudomonas aeruginosa and Pseudomonas putida.
Area of Science:
- Microbiology
- Molecular Biology
- Bacteriophage Research
Background:
- Plasmids are extrachromosomal DNA elements that can influence bacterial physiology.
- Bacteriophages are viruses that infect bacteria and are crucial in microbial ecology.
- Plasmid-incompatibility groups classify plasmids that cannot coexist within the same cell.
Purpose of the Study:
- To investigate how different plasmid incompatibility groups affect bacteriophage propagation in Pseudomonas aeruginosa and Pseudomonas putida.
- To identify specific plasmid groups and individual plasmids that limit bacteriophage growth.
- To compare the effects of plasmids on bacteriophage growth between P. aeruginosa and P. putida species.
Main Methods:
- Experimental infection of Pseudomonas strains containing various plasmids with different bacteriophages.
- Observation and quantification of bacteriophage growth inhibition in the presence of specific plasmids.
- Comparative analysis of plasmid effects across different incompatibility groups and bacterial species.
Main Results:
- Plasmids from the P-2 incompatibility group most frequently limited bacteriophage growth.
- Specific P-2 plasmids exhibited distinct spectra of bacteriophage growth inhibition.
- Plasmids from incompatibility groups P-5, P-9, and P-10 also suppressed the growth of certain bacteriophages.
- Some plasmids did not show any significant interaction with bacteriophages.
- Differences in plasmid-mediated bacteriophage growth inhibition were observed between P. aeruginosa and P. putida.
Conclusions:
- Plasmid incompatibility groups, especially P-2, play a significant role in regulating bacteriophage proliferation in Pseudomonas.
- The impact of plasmids on bacteriophage growth is specific to the plasmid incompatibility group and the target bacteriophage.
- Species-specific differences exist in how plasmids affect bacteriophage interactions in P. aeruginosa and P. putida.