EXPANSIN A1-mediated radial swelling of pericycle cells positions anticlinal cell divisions during lateral root initiation. Ramakrishna, P., Duarte, P. R., Rance, G. A., Schubert, M., Vordermaier, V., Vu, L. D., Murphy, E., Barro, A. V., Swarup, K., Moirangthem, K., Jørgensen, B., Cotte, B. v. d., Goh, T., Lin, Z., Voβ, U., Beeckman, T., Bennett, M. J., Gevaert, K., Maizel, A., & Smet, I. D. Proceedings of the National Academy of Sciences, 116(17):8597–8602, April, 2019. 00004 ![EXPANSIN A1-mediated radial swelling of pericycle cells positions anticlinal cell divisions during lateral root initiation [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex 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.
@article{ramakrishna_expansin_2019,
title = {{EXPANSIN} {A1}-mediated radial swelling of pericycle cells positions anticlinal cell divisions during lateral root initiation},
volume = {116},
copyright = {Copyright © 2019 the Author(s). Published by PNAS.. https://creativecommons.org/licenses/by-nc-nd/4.0/This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).},
issn = {0027-8424, 1091-6490},
url = {https://www.pnas.org/content/116/17/8597},
doi = {10/gfxx3w},
abstract = {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.},
language = {en},
number = {17},
urldate = {2019-10-10},
journal = {Proceedings of the National Academy of Sciences},
author = {Ramakrishna, Priya and Duarte, Paola Ruiz and Rance, Graham A. and Schubert, Martin and Vordermaier, Vera and Vu, Lam Dai and Murphy, Evan and Barro, Amaya Vilches and Swarup, Kamal and Moirangthem, Kamaljit and Jørgensen, Bodil and Cotte, Brigitte van de and Goh, Tatsuaki and Lin, Zhefeng and Voβ, Ute and Beeckman, Tom and Bennett, Malcolm J. and Gevaert, Kris and Maizel, Alexis and Smet, Ive De},
month = apr,
year = {2019},
pmid = {30944225},
note = {00004 },
keywords = {Arabidopsis thaliana, EXPANSIN A1, cell wall remodeling, lateral root development, radial cell expansion},
pages = {8597--8602},
}
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