CHAOTIZATION OF DIVISION SPINDLE, PHRAGMOPLAST, AND TELOPHASE CHROMOSOME
GROUPS IN WHEATWHEATGRASS F1 HYBRIDS MEIOSIS
N. V. Shamina,1 N. S. Ilyushchenkova,2 T. O. Pyl’nik,2
M. Yu. Solov’eva,2 Yu. E. Spitsina 2
1 Institute of Chemical Biology and Fundamental Medicine of SB RAS, Novosibirsk,
and 2 Department of Cytology and Genetics of Novosibirsk State University;
e-mail: shamina@mcb.nsc.ru
The paper describes the phenomenon of disorganization of completely formed subcellular structures: division
spindle, phragmoplast and chromosome telophase groups. These structures disintegrate into their elements
(cytoskeletal fibers, chromosomes) that transform into chaotic system. Chaotization of cytoskeleton structures
such as prophase spindle in mitosis or perinuclear ring in meiosis is a normal step of wild type plant cell division.
Disintegration of division spindle and phragmoplast presumably indicate the abnormality of temporal regulation
of cytoskeleton cycle during meiosis. Disintegration of telophase chromosome groups and the migration
of the chromosomes backward to the equatorial area might mean the abnormal start of some prometaphase mechanisms,
in particular, chromokinesins activation.
Key words: cytokinesis, cytoskeleton, division spindle, meiosis, phragmoplast, plant cell division, pollen mother cells (PMCs)
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