Barro, Amaya Vilches and Stoeckle, Dorothee and Thellmann, Martha and Ruiz-Duarte, Paola and Bald, Lotte and Louveaux, Marion and von Bom, Patrick and Denninger, Philipp and Goh, Tatsuaki and Fukaki, Hidehiro and Vermeer, Joop E. M. and Maizel, Alexis (2019) Cytoskeleton Dynamics Are Necessary for Early Events of Lateral Root Initiation in Arabidopsis. CURRENT BIOLOGY, 29 (15). 2443-+. ISSN 0960-9822, 1879-0445
Full text not available from this repository. (Request a copy)Abstract
How plant cells re-establish differential growth to initiate organs is poorly understood. Morphogenesis of lateral roots relies on the asymmetric cell division of initially symmetric founder cells. This division is preceded by the tightly controlled asymmetric radial expansion of these cells. The cellular mechanisms that license and ensure the coordination of these events are unknown. Here, we quantitatively analyze microtubule and F-actin dynamics during lateral root initiation. Using mutants and pharmacological and tissue-specific genetic perturbations, we show that dynamic reorganization of both microtubule and F-actin networks is necessary for the asymmetric expansion of the founder cells. This cytoskeleton remodeling intertwines with auxin signaling in the pericycle and endodermis in order for founder cells to acquire a basic polarity required for initiating lateral root development. Our results reveal the conservation of cell remodeling and polarization strategies between the Arabidopsis zygote and lateral root founder cells. We propose that coordinated, auxin-driven reorganization of the cytoskeleton licenses asymmetric cell growth and divisions during embryonic and post-embryonic organogenesis.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CELL-DIVISION; CORTICAL MICROTUBULES; ACTIN CYTOSKELETON; HORMONAL-CONTROL; GROWTH; GENE; STRESS; DIFFERENTIATION; MORPHOGENESIS; ACTIVATION; |
| Subjects: | 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Zellbiologie und Pflanzenphysiologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Apr 2020 05:29 |
| Last Modified: | 01 Apr 2020 05:29 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26456 |
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