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Optimal BR signalling is required for adequate cell wall orientation in the Arabidopsis root meristem.
- Source :
-
Development (Cambridge, England) [Development] 2021 Nov 01; Vol. 148 (21). Date of Electronic Publication: 2021 Nov 05. - Publication Year :
- 2021
-
Abstract
- Plant brassinosteroid hormones (BRs) regulate growth in part through altering the properties of the cell wall, the extracellular matrix of plant cells. Conversely, feedback signalling from the wall connects the state of cell wall homeostasis to the BR receptor complex and modulates BR activity. Here, we report that both pectin-triggered cell wall signalling and impaired BR signalling result in altered cell wall orientation in the Arabidopsis root meristem. Furthermore, both depletion of endogenous BRs and exogenous supply of BRs triggered these defects. Cell wall signalling-induced alterations in the orientation of newly placed walls appear to occur late during cytokinesis, after initial positioning of the cortical division zone. Tissue-specific perturbations of BR signalling revealed that the cellular malfunction is unrelated to previously described whole organ growth defects. Thus, tissue type separates the pleiotropic effects of cell wall/BR signals and highlights their importance during cell wall placement.<br />Competing Interests: Competing interests The authors declare no competing or financial interests.<br /> (© 2021. Published by The Company of Biologists Ltd.)
- Subjects :
- Arabidopsis cytology
Arabidopsis growth & development
Arabidopsis Proteins metabolism
Cell Division
Cytokinesis
Homeostasis
Meristem cytology
Pectins metabolism
Plant Roots cytology
Plant Roots growth & development
Plant Roots metabolism
Arabidopsis metabolism
Brassinosteroids metabolism
Cell Wall metabolism
Meristem metabolism
Signal Transduction
Subjects
Details
- Language :
- English
- ISSN :
- 1477-9129
- Volume :
- 148
- Issue :
- 21
- Database :
- MEDLINE
- Journal :
- Development (Cambridge, England)
- Publication Type :
- Academic Journal
- Accession number :
- 34739031
- Full Text :
- https://doi.org/10.1242/dev.199504