ABSTRACT
In plants with successive cytokinesis, the meiosis II spindles and phragmoplasts develop and act separately in both cells of a dyad. In plants with simultaneous cytokinesis, two spindles are formed, and after meiosis II two barrel-shaped phragmoplasts arise between two pairs of sister nuclei. Then the microtubules interconnect non-sister nuclei and take part in the formation of secondary phragmoplasts. The cytokinetic process is carried out by a quadripolar system of phragmoplasts, and the coenocytic microsporocyte is divided simultaneously into a tetrad.
