Cell plate

Cell plate

Cytokinesis in terrestrial plants occurs by cell plate formation. This process entails the delivery of 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-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-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 stacks explains why plant cells, unlike mammalian cells, do not disassemble their secretion machinery during cell division.


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  • cell plate — cell′ plate n. bot (in plant cells) a plate that develops at the midpoint between the two groups of chromosomes in a dividing cell and that then forms the wall between the two daughter cells • Etymology: 1880–85 …   From formal English to slang

  • cell plate — n a disk formed in the phragmoplast of a dividing plant cell that eventually forms the middle lamella of the wall between the daughter cells …   Medical dictionary

  • cell plate — cell plate. См. клеточная пластинка. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • cell plate — noun : a disk formed in the phragmoplast of a dividing plant cell, marking the beginning of separation into two daughter cells, developing gradually from the center toward the parent cell, and eventually forming the true middle lamella of the… …   Useful english dictionary

  • cell plate — The precursor of the cell wall, formed at the beginning of cell division. The cell plate develops in the region of the equatorial plate and arises from membranes in the cytoplasm …   Glossary of Biotechnology

  • cell plate — Region in which the new cell wall forms after the division of a plant cell. In the plane of the equator of the spindle a disc like structure, the phragmoplast forms, into which are inserted pole derived microtubules. Golgi derived vesicles… …   Dictionary of molecular biology

  • cell plate — (in plant cells) a plate that develops at the midpoint between the two groups of chromosomes in a dividing cell and that is involved in forming the wall between the two new daughter cells. [1880 85] * * * …   Universalium

  • cell plate — noun Date: 1882 a disk formed in the phragmoplast of a dividing plant cell that eventually forms the middle lamella of the wall between the daughter cells …   New Collegiate Dictionary

  • cell plate — noun The beginning of the formation of a cell wall …   Wiktionary

  • cell — cell1 cell like, adj. /sel/, n. 1. a small room, as in a convent or prison. 2. any of various small compartments or bounded areas forming part of a whole. 3. a small group acting as a unit within a larger organization: a local cell of the… …   Universalium

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