Phragmoplast microtubule dynamics - a game of zones

Journal of Cell Science
Andrei P SmertenkoErika A Serrano-Romero

Abstract

Plant morphogenesis relies on the accurate positioning of the partition (cell plate) between dividing cells during cytokinesis. The cell plate is synthetized by a specialized structure called the phragmoplast, which consists of microtubules, actin filaments, membrane compartments and associated proteins. The phragmoplast forms between daughter nuclei during the transition from anaphase to telophase. As cells are commonly larger than the originally formed phragmoplast, the construction of the cell plate requires phragmoplast expansion. This expansion depends on microtubule polymerization at the phragmoplast forefront (leading zone) and loss at the back (lagging zone). Leading and lagging zones sandwich the 'transition' zone. A population of stable microtubules in the transition zone facilitates transport of building materials to the midzone where the cell plate assembly takes place. Whereas microtubules undergo dynamic instability in all zones, the overall balance appears to be shifted towards depolymerization in the lagging zone. Polymerization of microtubules behind the lagging zone has not been reported to date, suggesting that microtubule loss there is irreversible. In this Review, we discuss: (1) the regulation of microtubu...Continue Reading

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Citations

May 12, 2019·Journal of Cell Science·Sharol Schmidt, Andrei Smertenko
Feb 24, 2019·Annual Review of Plant Biology·Pantelis Livanos, Sabine Müller
Mar 28, 2019·Frontiers in Plant Science·Tereza VavrdováGeorge Komis
Dec 19, 2020·Biochemical Society Transactions·Léo Serra, Sarah Robinson
Jan 12, 2021·Plant Signaling & Behavior·Keisho Maeda, Takumi Higaki
Feb 13, 2021·International Journal of Molecular Sciences·Emmanuel PanterisIoannis-Dimosthenis S Adamakis
Dec 31, 2020·International Journal of Molecular Sciences·Dominik Harant, Ingeborg Lang
Aug 4, 2018·Current Opinion in Plant Biology·Andrei Smertenko
Apr 10, 2019·Trends in Cell Biology·Lorenzo Galluzzi, Guido Kroemer

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