Cell plate 2482943 213734224 2008-05-20T16:51:24Z VoABot II 1879647 BOT - Reverted edits by [[Special:Contributions/168.169.153.140|168.169.153.140]] {[[User:VoABot_II/Help#Revert_reasons|possible vandalism]]} ([[User:VoABot_II/Mistakes|mistake?]]) to last version by "ClueBot". [[image:Phragmoplast.png|thumb|300px|Phragmoplast and cell plate formation in a plant cell during cytokinesis. Left side: Phragmoplast forms and cell plate starts to assemble in the center of the cell. Towards the right: Phragmoplast enlarges in a donut-shape towards the outside of the cell, leaving behind mature cell plate in the center. The cell plate will transform into the new cell wall once cytokinesis is complete.]] [[Cytokinesis]] in terrestrial plants occurs by '''cell plate''' formation. This process entails the delivery of [[Golgi apparatus|Golgi]]-derived and endosomal vesicles carrying [[cell wall]] and [[cell membrane]] components to the plane of [[cell division]] and the subsequent fusion of these vesicles within this plane. After formation of an early tubulo-vesicular network at the center of the cell, the initially labile cell plate consolidates into a tubular network and eventually a fenestrated sheet. The cell plate grows outward from the center of the cell to the parental plasma membrane with which it will fuse, thus completing [[cell division]]. Formation and growth of the cell plate is dependent upon the [[phragmoplast]], which is required for proper targeting of [[Golgi apparatus|Golgi]]-derived vesicles to the cell plate. As the cell plate matures in the central part of the cell, the [[phragmoplast]] disassembles in this region and new elements are added on its outside. This process leads to a steady expansion of the phragmoplast, and concomitantly, to a continuous retargeting of [[Golgi apparatus|Golgi]]-derived vesicles to the growing edge of the cell plate. Once the cell plate reaches and fuses with the plasma membrane the [[phragmoplast]] disappears. This event not only marks the separation of the two daughter cells, but also initiates a range of biochemical modifications that transform the [[callose]]-rich, flexible cell plate into a [[cellulose]]-rich, stiff primary [[cell wall]]. The heavy dependence of cell plate formation on active [[Golgi apparatus|Golgi]] stacks explains why [[plant cell]]s, unlike mammalian cells, do not disassemble their secretion machinery during cell division. [[Category:Cell cycle]] [[Category:Mitosis]] [[Category:Plant cells]] [[sr:Ћелијска плоча]]