Xyloglucan remodeling defines auxin-dependent differential tissue expansion in plants
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- Xyloglucan Remodeling Defines Auxin-Dependent Differential Tissue Expansion in Plants
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Size control is a fundamental question in biology, showing incremental complexity in plants, whose cells possess a rigid cell wall. The phytohormone auxin is a vital growth regulator with central importance for differential growth control. Our results indicate that auxin-reliant growth programs affect the molecular complexity of xyloglucans, the major type of cell wall hemi-cellulose in eudicots. Auxin-dependent induction and repression of growth coincide with reduced and enhanced molecular complexity of xyloglucans, respectively. In agreement with a proposed function in growth control, genetic interference with xyloglucan side decorations distinctly modulates auxin-dependent differential growth rates. Our work proposes that auxin-dependent growth programs have a spatially defined effect on xyloglucan’s molecular structure, which in turn affects cell wall mechanics and specifies differential, gravitropic hypocotyl growth.
Original language | English |
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Article number | 9222 |
Journal | International Journal of Molecular Sciences |
Volume | 22 |
Issue number | 17 |
Number of pages | 19 |
ISSN | 1661-6596 |
DOIs | |
Publication status | Published - 2021 |
Bibliographical note
Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
- Auxin, Cell wall, Gravitropism, Growth, Hypocotyls, Xyloglucans
Research areas
ID: 279882336