Centering the organizing center in the Arabidopsis thaliana shoot apical meristem by a combination of cytokinin signaling and self-organization

M. Adibi, S. Yoshida, D. Weijers, C. Fleck, PLoS One 11 (2016).

Download
OA 4.30 MB

Journal Article | Published | English
Author
; ; ;
Department
Abstract
Plants have the ability to continously generate new organs by maintaining populations of stem cells throught their lives. The shoot apical meristem (SAM) provides a stable environment for the maintenance of stem cells. All cells inside the SAM divide, yet boundaries and patterns are maintained. Experimental evidence indicates that patterning is independent of cell lineage, thus a dynamic self-regulatory mechanism is required. A pivotal role in the organization of the SAM is played by the WUSCHEL gene (WUS). An important question in this regard is that how WUS expression is positioned in the SAM via a cell-lineage independent signaling mechanism. In this study we demonstrate via mathematical modeling that a combination of an inhibitor of the Cytokinin (CK) receptor, Arabidopsis histidine kinase 4 (AHK4) and two morphogens originating from the top cell layer, can plausibly account for the cell lineage-independent centering of WUS expression within SAM. Furthermore, our laser ablation and microsurgical experiments support the hypothesis that patterning in SAM occurs at the level of CK reception and signaling. The model suggests that the interplay between CK signaling, WUS/CLV feedback loop and boundary signals can account for positioning of the WUS expression, and provides directions for further experimental investigation.
Publishing Year
Date Published
2016-02-01
Journal Title
PLoS One
Acknowledgement
We thank J. Traas, B. Müller and V. Reddy for providing seed materials and Y. Deb for advice regarding the laser ablation experiments. We specially thank Thomas Laux for stimulating discussions and support in the initial phase of this project.
Volume
11
Issue
2
Article Number
e0147830
IST-REx-ID

Cite this

Adibi M, Yoshida S, Weijers D, Fleck C. Centering the organizing center in the Arabidopsis thaliana shoot apical meristem by a combination of cytokinin signaling and self-organization. PLoS One. 2016;11(2). doi:10.1371/journal.pone.0147830
Adibi, M., Yoshida, S., Weijers, D., & Fleck, C. (2016). Centering the organizing center in the Arabidopsis thaliana shoot apical meristem by a combination of cytokinin signaling and self-organization. PLoS One, 11(2). https://doi.org/10.1371/journal.pone.0147830
Adibi, Milad, Saiko Yoshida, Dolf Weijers, and Christian Fleck. “Centering the Organizing Center in the Arabidopsis Thaliana Shoot Apical Meristem by a Combination of Cytokinin Signaling and Self-Organization.” PLoS One 11, no. 2 (2016). https://doi.org/10.1371/journal.pone.0147830.
M. Adibi, S. Yoshida, D. Weijers, and C. Fleck, “Centering the organizing center in the Arabidopsis thaliana shoot apical meristem by a combination of cytokinin signaling and self-organization,” PLoS One, vol. 11, no. 2, 2016.
Adibi M, Yoshida S, Weijers D, Fleck C. 2016. Centering the organizing center in the Arabidopsis thaliana shoot apical meristem by a combination of cytokinin signaling and self-organization. PLoS One. 11(2).
Adibi, Milad, et al. “Centering the Organizing Center in the Arabidopsis Thaliana Shoot Apical Meristem by a Combination of Cytokinin Signaling and Self-Organization.” PLoS One, vol. 11, no. 2, e0147830, Public Library of Science, 2016, doi:10.1371/journal.pone.0147830.
All files available under the following license(s):
Creative Commons License:
CC-BYCreative Commons Attribution 4.0 International Public License (CC-BY 4.0)
Main File(s)
Access Level
OA Open Access
Last Uploaded
2018-12-12T10:14:16Z


Export

Marked Publications

Open Data IST Research Explorer

Search this title in

Google Scholar