Summary
The microtubule distribution during the transition from interphase to the mitotic phase was examined at ultrastructural level in large highly vacuolated cells ofNautilocalyx lynchii and in small non-vacuolated cells ofPisum sativum. Both cell types contain, besides preprophase bands and perinuclear microtubules, also microtubules radiating from the nucleus into the transvacuolar cytoplasmic strands and cytoplasm respectively.
This microtubule array appears to be nucleated by the cell's nuclear envelope (NE) or NE-surrounding cytoplasm.
It is hypothesized that the microtubules radiating from the nucleusinitially play a role in the mobilization of the nucleus whilelater on a stabilized part of this array anchors the nucleus in the plane of cell division, and thus forms a cytoskeletal link between nucleus and division site.
Our results are discussed in the light of previous work on cytoplasmic behaviour during interphase-mitosis transition in highly vacuolated plant cells.
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Bakhuizen, R., van Spronsen, P.C., Sluiman-den Hertog, F.A.J. et al. Nuclear envelope radiating microtubules in plant cells during interphase mitosis transition. Protoplasma 128, 43–51 (1985). https://doi.org/10.1007/BF01273234
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DOI: https://doi.org/10.1007/BF01273234