DYNAMICS OF MICROTUBULAR CYTOSKELETON IN HIGHER PLANT MEIOSIS.
II. THE STAGE OF PROPHASE PERINUCLEAR BAND FORMATION
N. V. Shamina,1,* N. V. Dorogova,1 E. G. Seriukova 2
1 Institute of Cytology and Genetics, Siberian Brunch of RAS, Novosibirs, and
2 Omsk State Agrouniversity;
* e-mail: shamina@bionet.nsc.ru
Analyses of correspondent meiotic abnormalities is a good tool for studying cytoskeletal rearrangements during
plant cell division. The paper reports on the wheat X wheatgrass Fl hybrids, showing various abnormalities during
organization of the prophase perinuclear band of microtubules (PNB) in male meiosis. Based on these data, it may be
concluded that the perinuclear system of microtubules (MT) in higher plant meiosis is formed from fibrils of the
radial system as a result of their translocation in the cell cytoplasm space. According to our data, at this stage
the radial MT arrays pass through the following consequence of events: separating from the nuclear envelope, 2)
approaching, 3) tangential orientation to the nuclear surface, 4) bending, 5) coorientation, lateral interaction.
As a result, a flat ring of well organized concentric bent MT bundles encircling the nucleus meridionally is
organized.
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