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

Amir J. Bidhendi, Bara Altartouri, Frédérick P. Gosselin and Anja Geitmann

Article (2019)

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Cite this document: Bidhendi, A. J., Altartouri, B., Gosselin, F. P. & Geitmann, A. (2019). Mechanical stress initiates and sustains the morphogenesis of wavy leaf epidermal cells. Cell Report, 28(5), 1237-1250.e6. doi:10.1016/j.celrep.2019.07.006
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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

Open Access document in PolyPublie
Subjects: 2100 Génie mécanique > 2100 Génie mécanique
Department: Département de génie mécanique
Research Center: Autre
Funders: CRSNG/NSERC - Discovery Grant, Canada Research Chair Program
Date Deposited: 12 May 2021 10:48
Last Modified: 13 May 2021 01:20
PolyPublie URL: https://publications.polymtl.ca/4790/
Document issued by the official publisher
Journal Title: Cell Report (vol. 28, no. 5)
Publisher: Elsevier
Official URL: https://doi.org/10.1016/j.celrep.2019.07.006

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