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Mechanical stress initiates and sustains the morphogenesis of wavy leaf epidermal cells

Amir J. Bidhendi, Bara Altartouri, Frederick Gosselin and Anja Geitmann

Article (2019)

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Abstract

Pavement cells form wavy interlocking patterns in the leaf epidermis of many plants. We use computational mechanics to simulate the morphogenetic process based on microtubule organization and cell wall chemistry. Based on the in silico simulations and experimental evidence, we suggest that a multistep process underlies the morphogenesis of pavement cells. The in silico model predicts alternatingly located, feedback-augmented mechanical heterogeneity of the periclinal and anticlinal walls. It suggests that the emergence of waves is created by a stiffening of the emerging indented sides, an effect that matches cellulose and de-esterified pectin patterns in the cell wall. Further, conceptual evidence for mechanical buckling of the cell walls is provided, a mechanism that has the potential to initiate wavy patterns de novo and may precede chemical and geometrical symmetry breaking.

Uncontrolled Keywords

buckling; cellulose; feedback loop; leaf epidermis; lobes; morphogenesis; pavement cells; pectin; plant cell mechanics; stress and strain

Subjects: 2100 Mechanical engineering > 2100 Mechanical engineering
Department: Department of Mechanical Engineering
Research Center: LM2 - Laboratory for Multi-scale Mechanics
Funders: CRSNG/NSERC - Discovery Grant, Canada Research Chair Program
PolyPublie URL: https://publications.polymtl.ca/4790/
Journal Title: Cell Report (vol. 28, no. 5)
Publisher: Elsevier
DOI: 10.1016/j.celrep.2019.07.006
Official URL: https://doi.org/10.1016/j.celrep.2019.07.006
Date Deposited: 12 May 2021 10:48
Last Modified: 09 Jun 2023 08:46
Cite in APA 7: Bidhendi, A. J., Altartouri, B., Gosselin, F., & Geitmann, A. (2019). Mechanical stress initiates and sustains the morphogenesis of wavy leaf epidermal cells. Cell Report, 28(5), 1237-1250.e6. https://doi.org/10.1016/j.celrep.2019.07.006

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