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

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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.
Keywords
Arabidopsis thaliana, EXPANSIN A1, cell wall remodeling, lateral root development, radial cell expansion

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Citation

Please use this url to cite or link to this publication:

Chicago
Ramakrishna, Priya, Paola Ruiz Duarte, Graham A. Rance, Martin Schubert, Vera Vordermaier, Lam Dai Vu, Evan Murphy, et al. 2019. “EXPANSIN A1-mediated Radial Swelling of Pericycle Cells Positions Anticlinal Cell Divisions During Lateral Root Initiation.” Proceedings of the National Academy of Sciences of the United States of America 116 (17): 8597–8602.
APA
Ramakrishna, P., Ruiz Duarte, P., Rance, G. A., Schubert, M., Vordermaier, V., Vu, L. D., Murphy, E., et al. (2019). EXPANSIN A1-mediated radial swelling of pericycle cells positions anticlinal cell divisions during lateral root initiation. Proceedings of the National Academy of Sciences of the United States of America, 116(17), 8597–8602.
Vancouver
1.
Ramakrishna P, Ruiz Duarte P, Rance GA, Schubert M, Vordermaier V, Vu LD, et al. EXPANSIN A1-mediated radial swelling of pericycle cells positions anticlinal cell divisions during lateral root initiation. Proceedings of the National Academy of Sciences of the United States of America. Proceedings of the National Academy of Sciences of the USA; 2019;116(17):8597–602.
MLA
Ramakrishna, Priya et al. “EXPANSIN A1-mediated Radial Swelling of Pericycle Cells Positions Anticlinal Cell Divisions During Lateral Root Initiation.” Proceedings of the National Academy of Sciences of the United States of America 116.17 (2019): 8597–8602. Print.
@article{8611509,
  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.},
  articleno    = {201820882},
  author       = {Ramakrishna, Priya and Ruiz Duarte, Paola and Rance, Graham A. and Schubert, Martin and Vordermaier, Vera and Vu, Lam Dai and Murphy, Evan and Vilches Barro, Amaya and Swarup, Kamal and Moirangthem, Kamaljit and J{\o}rgensen, Bodil and Van De Cotte, Brigitte and Goh, Tatsuaki and Lin, Zhefeng and Vo\ensuremath{\beta}, Ute and Beeckman, Tom and Bennett, Malcolm J. and Gevaert, Kris and Maizel, Alexis and De Smet, Ive},
  issn         = {0027-8424},
  journal      = {Proceedings of the National Academy of Sciences of the United States of America},
  language     = {eng},
  number       = {17},
  pages        = {201820882:8597--201820882:8602},
  publisher    = {Proceedings of the National Academy of Sciences of the USA},
  title        = {EXPANSIN A1-mediated radial swelling of pericycle cells positions anticlinal cell divisions during lateral root initiation},
  url          = {http://dx.doi.org/10.1073/pnas.1820882116},
  volume       = {116},
  year         = {2019},
}

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