Abstract
The compensation for phragmoplast dysfunction in the male meiosis of F1 wheat × rye hybrids was described. In pollen mother cells (PMCs), he transition from central spindle fibers (forming a solid bundle) to phragmoplast (hollow cylinder) was blocked. This blockage suppresses the centrifugal movement of the phragmoplast and cell-plate formation. As a result, cells become binucleate. Sometimes, two nuclei fuse and form one restitution nucleus. In PMCs of the wheat × rye F1 hybrid D-144 gp 06 year (T. aestivum n. 93-60 t 9 × S. cereale n. Saratovskaya 7) with this phenotype, an additional phragmoplast is formed at the late telophase. This occurs by a common mechanism for the development of the immobile phragmoplast in the meiosis in bicotyledons; new phragmoplasts arise as a result of microtubule polymerization starting from the spindle poles. The accessory phragmoplast facilitates a new cell plate assembly and achievement of cytokinesis.
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Abbreviations
- PMC:
-
pollen mother cell
- MT:
-
microtubules
- WCGH F1:
-
wheat × couch-grass hybrid, first generation
- WRH F1:
-
wheat × rye hybrid, first generation
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Original Russian Text © N.V. Shamina, L.F. Dudka, V.Ya. Kovtunenko, E.U. Bolobolova, 2009, published in Tsitologiya, Vol. 51, No. 4, 2009, pp. 297–300.
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Shamina, N.V., Dudka, L.F., Kovtunenko, V.Y. et al. Accessory phragmoplast corrects abnormal cytokinesis in wheat x rye hybrids. Cell Tiss. Biol. 3, 168–172 (2009). https://doi.org/10.1134/S1990519X09020084
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DOI: https://doi.org/10.1134/S1990519X09020084