Nukleolarvakuolen in den Zellen des Embryosackes vonJasione montana L.

Summary The transparent integument ofJasione montana ovules enables the observation of the nucleolar vacuolar pulsation in egg cell, in secondary nucleus and after the fertilization in zygote, in primary endosperm nucleus and in cells of embryo and endosperm too. The rate of vacuolar pulsation depends on their volume, on the total cell activity and with the endosperm cells on the length of their mitotic cycle. Vacuolar activity can be observed continuously during the developmental cycle of the endosperm cell nucleoli. It starts immediately after the nucleolus formation in telophase, it continues during entire interphase and it ends immediately before the nucleolus disappearence in the late prophase. The pulsation is not interrupted during the nucleoli fusion in prophase.

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Das Material für die Arbeit erhielten wir beim Drehen des wissenschaftlichen Filmes E 1751 am IWF in Göttingen. Für fachliche RatschlÄge, Durchführung der Filmaufnahmen und technische Mitarbeit danke ich Herrn Dr. H. K.Galle, Herrn H. H.Heunert und FrÄulein B.Milthaler. Die finanziellen Mittel stellte in dankenswerter Weise die DFG zur Verfügung.