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Cytosolic And Membrane Proteins In Plant Cytokinesis

Published online by Cambridge University Press:  02 July 2020

S. Y. Bednarek  and
C. Dickey
S. Y. Bednarek
Affiliation:
Department of Biochemistry, University of Wisconsin-Madison, Madison, WI53706-1569
C. Dickey
Affiliation:
Department of Biochemistry, University of Wisconsin-Madison, Madison, WI53706-1569
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Extract

The mechanism of cytokinesis in higher plants is distinct from that of animal and yeast cells. Dividing plant cells are separated by the de novo construction of the cell-plate across the inside of the cell. Assembly of this new organelle is directed by a specialized cytoskeletal structure called the phragmoplast, a unique macromolecular scaffold that appears late in mitosis and is composed of intermediate filaments, microfilaments, and microtubules. Secretory vesicles are guided along the phragmoplast cytoskeleton toward the equatorial region of the structure where they coalesce and fuse to form a membranous tubular-vesicular network within which cell wall biosynthesis is initiated. A smoother more plate-like structure develops and extends radially outward as additional vesicles are added to the growing margin of the cell-plate until it ultimately fuses with the parental plasma membrane yielding two daughter cells separated by a common cell wall and extracellular space.

Type
Application Of Correlative Microscopy To Studies Of Plant Cell Function
Information
Microscopy and Microanalysis , Volume 5 , Issue S2: Proceedings: Microscopy & Microanalysis '99, Microscopy Society of America 57th Annual Meeting, Microbeam Analysis Society 33rd Annual Meeting, Portland, Oregon August 1-5, 1999 , August 1999 , pp. 1248 - 1249
Copyright
Copyright © Microscopy Society of America

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References

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