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Related Experiment Videos

A Bacillus thuringiensis isolate possessing a spore-associated filament.

Joanne Rampersad1, Ayub Khan, David Ammons

  • 1The University of the West Indies, School of Agriculture, Trinidad, West Indies.

Current Microbiology
|November 25, 2003
PubMed
Summary

A novel bacterium within the Bacillus thuringiensis/Bacillus cereus group was discovered with a unique filamentous structure. This structure, including a parasporal body, is retained after sporulation and during spore germination.

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Area of Science:

  • Microbiology
  • Bacterial Morphology
  • Molecular Biology

Background:

  • Bacillus thuringiensis and Bacillus cereus are well-studied bacterial species.
  • Environmental screening is a common method for discovering novel microorganisms.
  • Bacterial sporulation involves complex structural changes.

Purpose of the Study:

  • To characterize a novel bacterium with an unusual filamentous structure.
  • To determine the phylogenetic placement of the novel isolate.
  • To investigate the morphology and behavior of the filamentous structure during sporulation and germination.

Main Methods:

  • Isolation of environmental bacteria.
  • 16S rRNA gene sequencing for phylogenetic analysis.
  • Phase-contrast and electron microscopy for structural visualization.

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Main Results:

  • A novel bacterium belonging to the Bacillus thuringiensis/Bacillus cereus group was identified.
  • The bacterium possesses a unique filamentous structure associated with a parasporal body.
  • This complex is retained after sporulation and remains attached to the cell wall upon germination.

Conclusions:

  • The novel bacterium exhibits a previously undescribed morphological feature within the Bacillus genus.
  • The persistent parasporal body/filament complex may have functional implications.
  • Further research is warranted to elucidate the composition and role of this novel structure.