DYNAMICS OF MICROTUBULAR CYTOSKELETON IN HIGHER PLANT MEIOSIS.
III. ABNORMALITIES OF THE EARLY PROMETAPHASE
N. V. Shamina * N. V. Dorogova, E. G. Seriukova, O. G. Silkova
Institute of Cytology and Genetics, Siberian Brunch of RAS, Novosibirs, and
Omsk State Agrouniversity;
* e-mail: shamina@bionet.nsc.ru
The early prometaphase and initial stages of meiotic spindle formation in higher plant PMCs were studied by
means of a new approach worked out by the authors: a morphological dissection that consists in the analysis of
various abnormalities of the process under study. Wide cereal hybrids Fl were used as a source of such
abnormalities: phenotypes with C-, S-shaped and combined spindle, with spindles surrounded by microtubule (MT)
ring and phenotypes with chaotic circular MT system in Ml. Three stages of early prometaphase not described before
(disintegration of perinuclear MT band, straightening of its bundles, and their translocation throughout the
cytoplasm) were revealed.
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