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Elektronenmikroskopischer Nachweis spezieller cytoplasmatischer Vesikel bei Micrasterias denticulata Bréb.

Electronmicroscopic detection of a special kind of cytoplasmic vesicle in Micrasterias denticulata

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Summary

Electronmicroscopic studies of growing and non-growing cells of Micrasterias denticulata Bréb., fixed with glutaraldehyde-OsO4, showed a special kind of cytoplasmic vesicle which has so far not been found in other cells. These particles (1000–1200 Å in diameter) are characterized, by an unusual, multilayered membrane and a rod-like content of high electronoptic density. The vesicles are found to be accumulated in the vicinity of the nucleus and in a positional relationship to the nuclear pores. Although no evidence could be found either for a direct passage of the vesicles through the pores or for a “blebbing”-process from the nuclear membrane, the rod-containing vesicles could be functional in the process of nuclearcytoplasmic exchange.

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Authors and Affiliations

  1. Institut für Entwicklungsphysiologie, Universität Köln, Köln, Deutschland

    Oswald Kiermayer

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  1. Oswald Kiermayer
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Additional information

Herrn Prof. Dr. H. Drawert zum 60. Geburtstag gewidmet.

Diese Arbeit wurde zum Teil durch ein National Science, Foundation Senior Foreign Scientist Fellowship an Dr. Oswald Kiermayer und durch einen Training Grant 5-T1-GM-707-06 an Dr. Keith R. Porter, Harvard University, unterstützt.

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Kiermayer, O. Elektronenmikroskopischer Nachweis spezieller cytoplasmatischer Vesikel bei Micrasterias denticulata Bréb.. Planta 96, 74–80 (1971). https://doi.org/10.1007/BF00397906

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  • DOI: https://doi.org/10.1007/BF00397906

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