Sidorchuk Iu V, Dorogova N V, Deĭneko E V, Shumnyĭ V K
Tsitologiia. 2008;50(5):447-51.
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.
在大多数双子叶植物中，花粉母细胞（PMCs）的胞质分裂在两个核分裂周期完成后发生一次，即同时型。本文展示了部分转基因烟草花粉母细胞在第一次减数分裂后导致胞质分裂触发的异常的细胞学图像和频率特征。结果表明，同时型胞质分裂典型的细胞骨架重组主要过程在这些细胞中没有任何改变。然而，在大多数情况下，过早的细胞分裂会出现异常，如膜“隧道”或“裂缝”形成。已确定额外一轮胞质分裂的启动不会阻断第二次减数分裂后的核周期和胞质分裂。因此，在这种异常情况下，细胞分裂从同时型转变为连续型。
