Pectin homogalacturonan nanofilament expansion drives morphogenesis in plant epidermal cells
- 28 February 2020
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 367 (6481), 1003-1007
- https://doi.org/10.1126/science.aaz5103
Abstract
The process by which plant cells expand and gain shape has presented a challenge for researchers. Current models propose that these processes are driven by turgor pressure acting on the cell wall. Using nanoimaging, we show that the cell wall contains pectin nanofilaments that possess an intrinsic expansion capacity. Additionally, we use growth models containing such structures to show that a complex plant cell shape can derive from chemically induced local and polarized expansion of the pectin nanofilaments without turgor-driven growth. Thus, the plant cell wall, outside of the cell itself, is an active participant in shaping plant cells. Extracellular matrix function may similarly guide cell shape in other kingdoms, including Animalia.Keywords
Funding Information
- Howard Hughes Medical Institute
- FP7 People: Marie-Curie Actions (201310)
- Gatsby Charitable Foundation (GAT3395/DAA)
- Gatsby Charitable Foundation (GAT3395/DAA)
- French National Research Agency (ANR-17-CE13-0007)
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