[Premature cytokinesis in pollen mother cells of transgenic tobacco plants Nicotiana tabacum L].
In majority species of dicotyledonous plants cytokinesis in PMCs occurs once after completion of two caryokinesis cycles, that is a simultaneous type. This paper represents cytological picture and frequency characteristics of abnormality which resulted in cytokinesis triggering after first meiotic division in a part of transgenic tobacco PMCs. It was shown that the main process of cytoskeleton reorganization typical for simultaneous cytokinesis remained without any alterations in such cells. However, in most cases premature cell division occurred with abnormalities such as membrane "tunnel" or "gash" formation. It was ascertained that initiation of additional round ofcytokinesis did not block nuclear cycle and cytokinesis after second meiotic division. Thus, transition of cell division from simultaneous type to successive one occurs under this abnormality.
Sidorchuk
Iu V
IuV
Dorogova
N V
NV
Deĭneko
E V
EV
Shumnyĭ
V K
VK
D048749:Cytokinesis; D003599:Cytoskeleton / Q000502:physiology; D017343:Genes, Plant; D008540:Meiosis; D030821:Plants, Genetically Modified / Q000502:physiology*; D011058:Pollen / Q000502:physiology; D014026:Nicotiana / Q000502:physiology*