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Positioning the Root Elongation Zone Is Saltatory and Receives Input from the Shoot

Baskin, Tobias I.; Preston, Simon; Zelinsky, Ellen; Yang, Xiaoli; Elmali, Melissa; Bellos, Dimitrios; Wells, Darren M.; Bennett, Malcolm J.

Authors

Tobias I. Baskin

Ellen Zelinsky

Xiaoli Yang

Melissa Elmali

Dimitrios Bellos

DARREN WELLS DARREN.WELLS@NOTTINGHAM.AC.UK
Principal Research Fellow



Abstract

In the root, meristem and elongation zone lengths remain stable, despite growth and division of cells. To gain insight into zone stability, we imaged individual Arabidopsis thaliana roots through a horizontal microscope, and used image analysis to obtain velocity profiles. For a root, velocity profiles obtained every 5 min over 3 h coincided closely, implying that zonation is regulated tightly. However, the position of the elongation zone saltated, by on average 17 μm every 5 min. Saltation was apparently driven by material elements growing faster and then slower, while moving through the growth zone. When the shoot was excised, after about 90 minutes, growth zone dynamics resembled those of intact roots, except that the position of the elongation zone moved, on average, rootward, by several hundred microns in 24 h. We hypothesize that mechanisms determining elongation zone position receive input from the shoot.

Citation

Baskin, T. I., Preston, S., Zelinsky, E., Yang, X., Elmali, M., Bellos, D., …Bennett, M. J. (2020). Positioning the Root Elongation Zone Is Saltatory and Receives Input from the Shoot. iScience, 23(7), https://doi.org/10.1016/j.isci.2020.101309

Journal Article Type Article
Acceptance Date Jun 18, 2020
Online Publication Date Jun 24, 2020
Publication Date Jul 24, 2020
Deposit Date Jun 29, 2020
Publicly Available Date Jun 30, 2020
Journal iScience
Electronic ISSN 2589-0042
Publisher Elsevier (Cell Press)
Peer Reviewed Peer Reviewed
Volume 23
Issue 7
Article Number 101309
DOI https://doi.org/10.1016/j.isci.2020.101309
Public URL https://nottingham-repository.worktribe.com/output/4736840
Publisher URL https://www.cell.com/iscience/fulltext/S2589-0042(20)30496-X

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Publisher Licence URL
http://creativecommons.org/licenses/by-nc-nd/4.0/





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