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Rheotactic behavior of a gliding mycoplasma
R Rosengarten1, A Klein-Struckmeier, H Kirchhoff
1Institut für Mikrobiologie und Tierseuchen, Tierärztliche Hochschule Hannover, Federal Republic of Germany.
Journal of Bacteriology
|February 1, 1988
Summary
This study identifies Mycoplasma mobile, a novel fish gill bacterium, exhibiting positive rheotaxis. These microorganisms demonstrate directed movement upstream in fluid flow, a first for prokaryotes.
Area of Science:
- Microbiology
- Behavioral Ecology
- Cell Motility
Background:
- Mycoplasmas are a unique class of bacteria lacking cell walls.
- Gliding motility is a poorly understood form of bacterial locomotion.
- The ecological roles of many mycoplasma species remain unclear.
Purpose of the Study:
- To characterize the motility and behavior of a newly isolated mycoplasma species.
- To investigate the potential for directed movement in response to fluid flow in prokaryotes.
- To describe the phenomenon of rheotaxis in Mycoplasma mobile.
Main Methods:
- Isolation and culturing of Mycoplasma mobile from fish gills.
- Microscopic observation of cell behavior in controlled fluid dynamics.
- Analysis of cell trajectory and velocity in relation to flow direction.
Main Results:
- Mycoplasma mobile was successfully isolated and identified as a gliding bacterium.
- The cells exhibited positive rheotaxis, consistently moving upstream against a current.
- This directed movement was observed consistently across multiple trials and conditions.
Conclusions:
- Mycoplasma mobile demonstrates a previously undescribed rheotactic behavior in prokaryotes.
- This finding expands our understanding of bacterial motility and environmental responses.
- The ability to sense and respond to fluid flow may have significant ecological implications for this species.