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Appendage development in Clostridium bifermentans.

W A Samsonoff, T Hashimoto, S F Conti

    Journal of Bacteriology
    |April 1, 1971
    PubMed
    Summary
    This summary is machine-generated.

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    The study reveals that Clostridium bifermentans spore appendages originate externally, forming a fibrous network attached to the mature spore. This structure is crucial for spore integrity and attachment.

    Area of Science:

    • Microbiology
    • Cell Biology
    • Bacterial Spore Formation

    Background:

    • Clostridium bifermentans spores possess unique appendages.
    • The origin and development of these appendages are not fully understood.

    Purpose of the Study:

    • To elucidate the origin and structural characteristics of Clostridium bifermentans spore appendages.
    • To describe the relationship between appendage development, spore coat formation, and the exosporium.

    Main Methods:

    • Transmission electron microscopy (TEM)
    • Freeze-etching techniques to visualize spore ultrastructure

    Main Results:

    • Appendages originate from a substance external to the outer forespore membrane.

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  • A dense spore coat forms peripherally, separating developing appendages from their origin.
  • Freeze-etching reveals appendages as distinct fibers forming a network around the mature spore.
  • Appendage tubules have a fibrous inner lining and a smooth outer surface.
  • The developing exosporium comprises layered globular subunits, with an unstructured outer surface.

    • Conclusions:

    • Spore appendages in Clostridium bifermentans are extracellularly derived and form an integral fibrous network.
    • The spore coat and exosporium play distinct roles in appendage development and attachment to the mature spore.