[Dynamics of cytoskeleton microtubules in higher plant meiosis. II. Perinuclear band formation].
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 F1 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) co-orientation, lateral interaction. As a result, a flat ring of well organized concentric bent MT bundles encircling the nucleus meridionally is organized.
Shamina
N V
NV
Institute of Cytology and Genetics, Siberian Brunch of RAS, Novosibirs. shamina@bionet.nsc.ru
Dorogova
N V
NV
Seriukova
E G
EG
D002467:Cell Nucleus / Q000648:ultrastructure*; D008540:Meiosis; D008870:Microtubules / Q000648:ultrastructure*; D008941:Spindle Apparatus / Q000648:ultrastructure; D014908:Triticum / Q000648:ultrastructure*