DYNAMICS OF MICROTUBULAR CYTOSKELETON IN HIGHER PLANT MEIOSIS. IX. THE CYCLE ACCOMPLISHMENT. TRANSITION FROM
PHRAGMOPLAST TO RADIAL MICROTUBULE SYSTEM
N. V. Shamina, Yu. V. Sidorchuk, N. V. Dorogova
Institute of Cytology and Genetics, Siberian Branch of RAS, Novosibirsk;
e-mail: shamina@bionet.nsc.ru
In this study we analysed the terminal step of cytoskeleton cycle in higher plant meiosis: transition from
phragmoplast to radial interphase configuration. Wild type meiosis in a range of mono- and dicotyledonous species
was studied. A number of cytoskeleton abnormalities on this stage was described in meiotic mutants, haploids and
wide hybrids of various species. We described processes of cytoskeleton rearrangements on this stage: disjunction
of phragmoplast MTs, their shortening and the role of daughter cell membranes. The independence of the interphase
radial MT system formation from the previous steps of cytoskeleton cycle and from nuclear envelope cycle is
proposed.
Key words: cytoskeleton, microtubules, phragmoplast, nuclear envelope, meiosis, plant cell division,
meiotic mutants
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