Scientists have discovered that one of the most common bacteria in dental plaque, called Corynebacterium matruchotii, reproduces in an unusual way called multiple fission.
Most bacteria reproduce via binary fission, where the cell divides into two daughter cells. But C. matruchotii can divide into up to 14 new cells at once through multiple fission.
Researchers observed this using time-lapse microscopy of plaque biofilms. They saw the C. matruchotii filament elongate quickly at one end and then form multiple dividing walls simultaneously to break apart into many cells.
This rapid growth allows C. matruchotii colonies to expand up to half a millimeter per day, helping plaque return quickly no matter how well teeth are cleaned.
The bacteria’s lack of a flagellum is thought to drive its strange division, as it needs rapid growth to explore its environment and compete for resources in the densely populated mouth.
C. matruchotii forms filamentous networks that provide structure for other plaque bacteria. Its unique cell cycle appears to aid its ability to outcompete other species and form this scaffolding role.
Source: ScienceAlert
