EXPANSIN A1-mediated radial swelling of pericycle cells positions anticlinal cell divisions during lateral root initiation

In plants, postembryonic formation of new organs helps shape the adult organism. This requires the tight regulation of when and where a new organ is formed and a coordination of the underlying cell divisions. To build a root system, new lateral roots are continuously developing, and this process req...

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Hauptverfasser: Ramakrishna, Priya (VerfasserIn) , Ruiz Duarte, Paola (VerfasserIn) , Rance, Graham A. (VerfasserIn) , Schubert, Martin (VerfasserIn) , Vodermaier, Vera (VerfasserIn) , Vu, Lam Dai (VerfasserIn) , Murphy, Evan (VerfasserIn) , Vilches-Barro, Amaya (VerfasserIn) , Swarup, Kamal (VerfasserIn) , Moirangthem, Kamaljit (VerfasserIn) , Jørgensen, Bodil (VerfasserIn) , Cotte, Brigitte van de (VerfasserIn) , Goh, Tatsuaki (VerfasserIn) , Lin, Zhefeng (VerfasserIn) , Voβ, Ute (VerfasserIn) , Beeckman, Tom (VerfasserIn) , Bennett, Malcolm J. (VerfasserIn) , Gevaert, Kris (VerfasserIn) , Maizel, Alexis (VerfasserIn) , Smet, Ive De (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: April 23, 2019
In: Proceedings of the National Academy of Sciences of the United States of America
Year: 2019, Jahrgang: 116, Heft: 17, Pages: 8597-8602
ISSN:1091-6490
DOI:10.1073/pnas.1820882116
Online-Zugang:Verlag, Volltext: https://doi.org/10.1073/pnas.1820882116
Verlag, Volltext: https://www.pnas.org/content/116/17/8597
Volltext
Verfasserangaben:Priya Ramakrishna, Paola Ruiz Duarte, Graham A. Rance, Martin Schubert, Vera Vordermaier, Lam Dai Vu, Evan Murphy, Amaya Vilches Barro, Kamal Swarup, Kamaljit Moirangthem, Bodil Jørgensen, Brigitte van de Cotte, Tatsuaki Goh, Zhefeng Lin, Ute Voβ, Tom Beeckman, Malcolm J. Bennett, Kris Gevaert, Alexis Maizel, and Ive De Smet

MARC

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520 |a In plants, postembryonic formation of new organs helps shape the adult organism. This requires the tight regulation of when and where a new organ is formed and a coordination of the underlying cell divisions. To build a root system, new lateral roots are continuously developing, and this process requires the tight coordination of asymmetric cell division in adjacent pericycle cells. We identified EXPANSIN A1 (EXPA1) as a cell wall modifying enzyme controlling the divisions marking lateral root initiation. Loss of EXPA1 leads to defects in the first asymmetric pericycle cell divisions and the radial swelling of the pericycle during auxin-driven lateral root formation. We conclude that a localized radial expansion of adjacent pericycle cells is required to position the asymmetric cell divisions and generate a core of small daughter cells, which is a prerequisite for lateral root organogenesis. 
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