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Ultrastructure ofLabyrinthula

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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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Author notes

  1. David Porter

    Present address: The Biological Laboratories, Harvard University, 02138, Cambridge, MA, USA

Authors and Affiliations

  1. Department of Botany, University of Washington, Seattle, Washington

    David Porter

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  1. David Porter
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Portion of a dissertation submitted to the University of Washington in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Botany.

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Porter, D. Ultrastructure ofLabyrinthula . Protoplasma 67, 1–19 (1969). https://doi.org/10.1007/BF01256763

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  • DOI: https://doi.org/10.1007/BF01256763

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