Protoplasma

, Volume 67, Issue 1, pp 1–19 | Cite as

Ultrastructure ofLabyrinthula

  • David Porter
Article

Summary

Electron microscopic observations of the vegetative colony ofLabyrinthula clearly show that the “slimeways”, along which the cells glide, are extracellular and completely surround the cells. Membranes of this extracellular matrix have a trilaminar, unit membrane structure that is characteristic of the plasma membrane. The Golgi complex of the cells probably consists of two large dictyosomes. A membrane-limited bundle of parallel filaments of unknown function is usually adjacent to one dictyosome. Specialized invaginations of the plasma membrane, called bothrosomes, may be sites of membrane assembly and secretion of the “slimeway” matrix, the prerequisite substratum for the gliding cell movement.

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Copyright information

© Springer-Verlag 1969

Authors and Affiliations

  • David Porter
    • 1
  1. 1.Department of BotanyUniversity of WashingtonSeattle

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