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Ultrastructural studies of protostelids: The cyst stage ofCavostelium bisporum

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Summary

The ultrastructure of encystment stages in the flagellate protostelidCavostelium bisporum was studied with sectioned material fixed in sequential glutaraldehyde-OsO4.

Major features of encystment were (1) intensive release of vesicles via the plasmalemma, (2) deposition just exterior to the plasmalemma of membranous structures similar to the latter, (3) disappearance of food vacuoles with their concentrically lamellate, membranous residues, and (4) alterations in the complex of kinetosomes, microtubules, and Golgi apparatus that characterizes the flagellate stage. In view of the possible phylogenetic origin of myxomycetes from the protostelids, the ultrastructure of encystment in the two groups is compared.

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Author notes

  1. Lindsay S. Olive

    Present address: Department of Botany, University of North Carolina, Chapel Hill, North Carolina, USA

  2. Joao S. Furtado

    Present address: Instituto de Botânica, SÃo Paulo, SP, Brasil

Authors and Affiliations

  1. Department of Botany, University of North Carolina, Chapel Hill, North Carolina, USA

    Joao S. Furtado

Authors
  1. Joao S. Furtado
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  2. Lindsay S. Olive
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Additional information

Supported by U.S. National Science Foundation, Grant GB-7392.

Partially supported by “FundaÇÃo de Amparo à Pesquisa”, SÃo Paulo, Brasil.

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Furtado, J.S., Olive, L.S. Ultrastructural studies of protostelids: The cyst stage ofCavostelium bisporum . Protoplasma 70, 379–387 (1970). https://doi.org/10.1007/BF01275764

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  • DOI: https://doi.org/10.1007/BF01275764

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