Publication:
Mechano-Chemical Aspects of Organ Formation in Arabidopsis thaliana: The Relationship between Auxin and Pectin

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dc.contributor.authorBraybrook, Siobhan
dc.contributor.authorPeaucelle, Alexis
dc.contributor.editorGrebe, Markus
dc.date.accessioned2024-10-14T10:31:04Z
dc.date.available2024-10-14T10:31:04Z
dc.date.issued2013-03
dc.description.abstractHow instructive signals are translated into robust and predictable changes in growth is a central question in developmental biology. Recently, much interest has centered on the feedback between chemical instructions and mechanical changes for pattern formation in development. In plants, the patterned arrangement of aerial organs, or phyllotaxis, is instructed by the phytohormone auxin; however, it still remains to be seen how auxin is linked, at the apex, to the biochemical and mechanical changes of the cell wall required for organ outgrowth. Here, using Atomic Force Microscopy, we demonstrate that auxin reduces tissue rigidity prior to organ outgrowth in the shoot apex of Arabidopsis thaliana, and that the de-methyl-esterification of pectin is necessary for this reduction. We further show that development of functional organs produced by pectin-mediated ectopic wall softening requires auxin signaling. Lastly, we demonstrate that coordinated localization of the auxin transport protein, PIN1, is disrupted in a naked-apex produced by increasing cell wall rigidity. Our data indicates that a feedback loop between the instructive chemical auxin and cell wall mechanics may play a crucial role in phyllotactic patterning.
dc.description.numberOfPages10
dc.description.sponsorshipInstitut für Pflanzenwissenschaften (IPS)
dc.identifier.doi10.7892/boris.38697
dc.identifier.publisherDOI10.1371/journal.pone.0057813
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/111819
dc.language.isoen
dc.publisherPublic Library of Science
dc.publisher.placeLawrence, Kans.
dc.relation.ispartofPLoS ONE
dc.relation.issn1932-6203
dc.relation.organizationDCD5A442C224E17DE0405C82790C4DE2
dc.relation.organizationDCD5A442C579E17DE0405C82790C4DE2
dc.subject.ddc500 - Science::580 - Plants (Botany)
dc.titleMechano-Chemical Aspects of Organ Formation in Arabidopsis thaliana: The Relationship between Auxin and Pectin
dc.typearticle
dspace.entity.typePublication
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oaire.citation.issue3
oaire.citation.startPagee57813
oaire.citation.volume8
oairecerif.author.affiliationInstitut für Pflanzenwissenschaften (IPS)
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unibe.description.ispublishedpub
unibe.eprints.legacyId38697
unibe.journal.abbrevTitlePLOS ONE
unibe.refereedTRUE
unibe.subtype.articlejournal

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