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.
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Claims 6
Claim · model-written summary
Pectin-triggered cell wall signalling altered cell wall orientation in the Arabidopsis root meristem.
- Taxon
- Arabidopsis
Arabidopsist0 - Treatment
- pectin-triggered cell wall signallinge0
- Outcome
- cell wall orientatione0
- Direction
- alterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis root meristem”
e0“both pectin-triggered cell wall signalling and impaired BR signalling result in altered cell wall orientation in the Arabidopsis root meristem”
Claim · model-written summary
Impaired BR signalling altered cell wall orientation in the Arabidopsis root meristem.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- impaired BR signallinge0
- Outcome
- cell wall orientatione0
- Direction
- alterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis root meristem”
e0“both pectin-triggered cell wall signalling and impaired BR signalling result in altered cell wall orientation in the Arabidopsis root meristem”
Claim · model-written summary
Depletion of endogenous BRs triggered wall orientation defects.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- depletion of endogenous BRse0
- Outcome
- cell wall orientatione1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis root meristem”
e0“both depletion of endogenous BRs and exogenous supply of BRs triggered these defects”
e1“altered cell wall orientation in the Arabidopsis root meristem”
Claim · model-written summary
Exogenous BR supply triggered wall orientation defects.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- exogenous supply of BRse0
- Outcome
- cell wall orientatione1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis root meristem”
e0“both depletion of endogenous BRs and exogenous supply of BRs triggered these defects”
e1“altered cell wall orientation in the Arabidopsis root meristem”
Claim · model-written summary
Cell wall signalling altered orientation of newly placed walls late in cytokinesis after cortical division zone positioning.
- Taxon
- ArabidopsisArabidopsist0
- Outcome
- orientation of newly placed wallse0
- Qualifier
- late during cytokinesis, after initial positioning of the cortical division zonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis root meristem”
e0“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”
Claim · model-written summary
Tissue-specific BR signalling perturbation showed that the cellular malfunction was unrelated to whole-organ growth defects.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- Tissue-specific perturbations of BR signallinge0
- Outcome
- cellular malfunction is unrelated to previously described whole organ growth defectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis root meristem”
e0“Tissue-specific perturbations of BR signalling revealed that the cellular malfunction is unrelated to previously described whole organ growth defects”
The same questions in other papers
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