Pectin homogalacturonan nanofilament expansion drives morphogenesis in plant epidermal cells.
Accepted version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Haas, Kalina T https://orcid.org/0000-0002-3511-5719
Wightman, Raymond
Meyerowitz, Elliot M https://orcid.org/0000-0003-4798-5153
Peaucelle, Alexis https://orcid.org/0000-0002-8582-6500
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.
Description
Keywords
Arabidopsis, Cell Shape, Cell Wall, Cotyledon, Methylation, Molecular Imaging, Pectins, Plant Cells, Plant Development, Plant Epidermis
Journal Title
Science
Conference Name
Journal ISSN
0036-8075
1095-9203
1095-9203
Volume Title
367
Publisher
American Association for the Advancement of Science (AAAS)
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Rights
All rights reserved
Sponsorship
Gatsby Charitable Foundation (unknown)