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Cell division and trichome breakage inBeggiatoa
1Department of Microbiology, Louisiana State University, 70803, Baton Rouge, Louisiana, USA.
Current Microbiology
|January 23, 2013
Summary
Beggiatoa trichome division occurs via sacrificial cells (necridia) that lyse to split the filament. Cellular division involves septation of the cytoplasmic membrane and peptidoglycan layer, excluding outer envelopes.
Area of Science:
- Microbiology
- Cell Biology
- Bacteriology
Background:
- Beggiatoa are filamentous bacteria known for gliding motility.
- Understanding trichome division is crucial for bacterial reproduction and population dynamics.
Purpose of the Study:
- To elucidate the mechanism of trichome division in Beggiatoa.
- To compare Beggiatoa division with other bacterial groups.
Main Methods:
- Phase-contrast microscopy
- Transmission electron microscopy
- Scanning electron microscopy
Main Results:
- Trichome fragmentation occurs through the formation and lysis of specialized sacrificial cells (necridia).
- Cellular division within the trichome is achieved by septation involving the cytoplasmic membrane and peptidoglycan layer.
- Outer envelope layers are not involved in the division process.
Conclusions:
- Beggiatoa employs a unique necridia-mediated fragmentation for trichome division.
- This mechanism resembles that of oscillatorian cyanobacteria but differs from other gliding bacteria.
- Septation is the fundamental cellular division process, localized to specific internal layers.
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