TY  - JOUR
A1  - Majda, Mateusz
A1  - Grones, Peter
A1  - Sintorn, Ida-Maria
A1  - Vain, Thomas
A1  - Milani, Pascale
A1  - Krupinski, Pawel
A1  - Zagorska-Marek, Beata
A1  - Viotti, Corrado
A1  - Jonsson, Henrik
A1  - Mellerowicz, Ewa J.
A1  - Hamant, Olivier
A1  - Robert, Stephanie
T1  - Mechanochemical Polarization of Contiguous Cell Walls Shapes Plant Pavement Cells
JF  - Developmental cell
N2  - The epidermis of aerial plant organs is thought to be limiting for growth, because it acts as a continuous load-bearing layer, resisting tension. Leaf epidermis contains jigsaw puzzle piece-shaped pavement cells whose shape has been proposed to be a result of subcellular variations in expansion rate that induce local buckling events. Paradoxically, such local compressive buckling should not occur given the tensile stresses across the epidermis. Using computational modeling, we show that the simplest scenario to explain pavement cell shapes within an epidermis under tension must involve mechanical wall heterogeneities across and along the anticlinal pavement cell walls between adjacent cells. Combining genetics, atomic force microscopy, and immunolabeling, we demonstrate that contiguous cell walls indeed exhibit hybrid mechanochemical properties. Such biochemical wall heterogeneities precede wall bending. Altogether, this provides a possible mechanism for the generation of complex plant cell shapes.
Y1  - 2017
U6  - https://doi.org/10.1016/j.devcel.2017.10.017
SN  - 1534-5807
SN  - 1878-1551
VL  - 43
SP  - 290
EP  - +
PB  - Cell Press
CY  - Cambridge
ER  -