The PPB is component of the cytokinetic apparatus (Gunning, 1982) that marks and prepares the future division site.
It becomes functionally bipolar by convergence of poles in pairs toward a single spindle axis that terminates at cytokinetic furrows.
2012), we demonstrated that once furrowing commenced, centralspindlin-bundled overlapping microtubules from opposite asters in the equatorial cortex appeared to function as "miniature central spindles" in cytokinetic signaling, and accompanied the furrow as it ingressed to completion.
In our present study, we support and extend the miniature central spindle hypothesis by demonstrating that aligned arrays of centralspindlin-bundled microtubules not associated with a normal mitotic apparatus, were capable of performing cytokinetic signaling.
In all jungermanniopsid liverworts investigated, the expression of quadripolarity is initiated in sporocytes just entering the meiotic pathway by premeiotic bands of microtubules that define the future cytokinetic
planes and result in deeply quadrilobed cytoplasm.
Diversity of cell division in simple land plants holds clues to evolution of the mitotic and cytokinetic
apparatus in higher plants.
This self-organized network of actin filaments resembles the cytokinetic
ring of dividing cells in the following ways: (i) it exhibits myosin-II-mediated, anti-parallel sliding of actin filaments (4, 5), and (ii) it assembles during the M-phase of the cell cycle.
and cytogenetic effect of agricultural chemicals on human lymphoid cells in vitro.
Similarly, these advanced charophytes exhibit a distinctly land-plant ("embryophytic") pattern of mitotic and cytokinetic
events, including, an open mitosis with a persistent, interzonal spindle (the daughter mitotic nuclei remaining separated at a distance) and a phragmoplast (spindle fiber remnants perpendicular to the cytokinetic
plane and associated golgi-derived vesicles; el.
2+] is part of the signaling pathway that regulates assembly of the cytokinetic
ring of actin filaments.