Summary
The basidia of Coprinus radiatus develop synchronously. Both meiotic divisions happen within 30–40 min. During this time an undifferentiated centriole appears, divides and forms the spindle poles by radiating microtubules. For the nuclear envelope breaks down in the metaphase and restituates during telophase the meiosis is not intranuclear.
In meiotic basidia ER is regularly to be seen near the cell wall, it may be compared with the “ascus vesicle”. Moreover an organized ER-complex occurs during prophase. Its function is supposed to be a pool for restituation of the nuclear envelope; therefore it may be called “Kernteilungs-Reticulum”.
Zusammenfassung
Bei coprinus radiatus entwickeln sich die Basidien synchron. Die beiden meiotischen Teilungen laufen innerhalb von 30–40 min ab. Dabei erscheint ein undifferenziertes Centriol, das sich teilt und unter Ausstrahlung von Mikrotubuli die Spindelpole aufbaut. Die Kernhülle fragmentiert während der Metaphase und wird in der Telophase restauriert; es handelt sich hier also nicht um einen intranucleären Vorgang.
In den meiotischen Basidien läßt sich regelmäßig wandständiges ER nachweisen, das man mit dem “Ascusvesicel” vergleichen kann. Außerdem wird zum Zeitpunkt der Prophase ein organisierter ER-Komplex gebildet, dessen Funktion vermutlich darin besteht, als Reservoir für die Restitution der Kernhülle zu dienen; er soll deshalb als “Kernteilungs-Reticulum” bezeichnet werden.
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Kurzfassung einer Dissertation der Mathematisch-Naturwissenschaftlichen Fakultät der Freien Universität Berlin.
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Lerbs, V. Licht-und elektronenmikroskopische Untersuchungen an meiotischen Basidien von Coprinus radiatus (Bolt) Fr.. Archiv. Mikrobiol. 77, 308–330 (1971). https://doi.org/10.1007/BF00425034
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DOI: https://doi.org/10.1007/BF00425034