Root System Architecture from Coupling Cell Shape to Auxin Transport

Title:
Root System Architecture from Coupling Cell Shape to Auxin Transport
Authors:
Laskowski, Marta; Grieneisen, Verônica A.; Hofhuis, Hugo; ten Hove, Colette A.; Hogeweg, Paulien; Maréem, Athanasius F. M.; Scheres, Ben
Abstract:
Lateral organ position along roots and shoots largely determines plant architecture, and depends on auxin distribution patterns. Determination of the underlying patterning mechanisms has hitherto been complicated because they operate during growth and division. Here, we show by experiments and computational modeling that curvature of the Arabidopsis root influences cell sizes, which, together with tissue properties that determine auxin transport, induces higher auxin levels in the pericycle cells on the outside of the curve. The abundance and position of the auxin transporters restricts this response to the zone competent for lateral root formation. The auxin import facilitator, AUX1, is up-regulated by auxin, resulting in additional local auxin import, thus creating a new auxin maximum that triggers organ formation. Longitudinal spacing of lateral roots is modulated by PIN proteins that promote auxin efflux, and pin2,3,7 triple mutants show impaired lateral inhibition. Thus, lateral root patterning combines a trigger, such as cell size difference due to bending, with a self-organizing system that mediates alterations in auxin transport.
Citation:
Laskowski, Marta, V. Grieneisen, H. Hofhuis, C. ten Hove, et al. 2008. "Root System Architecture from Coupling Cell Shape to Auxin Transport." Plos Biology 6(12): 307.
Publisher:
Public Library of Science
DATE ISSUED:
2008
Department:
Biology
Type:
article
PUBLISHED VERSION:
10.1371/journal.pbio.0060307
PERMANENT LINK:
http://hdl.handle.net/11282/309138

Full metadata record

DC FieldValue Language
dc.contributor.authorLaskowski, Martaen_US
dc.contributor.authorGrieneisen, Verônica A.en_US
dc.contributor.authorHofhuis, Hugoen_US
dc.contributor.authorten Hove, Colette A.en_US
dc.contributor.authorHogeweg, Paulienen_US
dc.contributor.authorMaréem, Athanasius F. M.en_US
dc.contributor.authorScheres, Benen_US
dc.date.accessioned2013-12-23T16:03:18Z-
dc.date.available2013-12-23T16:03:18Z-
dc.date.issued2008en
dc.identifier.citationLaskowski, Marta, V. Grieneisen, H. Hofhuis, C. ten Hove, et al. 2008. "Root System Architecture from Coupling Cell Shape to Auxin Transport." Plos Biology 6(12): 307.en_US
dc.identifier.issn1544-9173en_US
dc.identifier.urihttp://hdl.handle.net/11282/309138-
dc.description.abstractLateral organ position along roots and shoots largely determines plant architecture, and depends on auxin distribution patterns. Determination of the underlying patterning mechanisms has hitherto been complicated because they operate during growth and division. Here, we show by experiments and computational modeling that curvature of the Arabidopsis root influences cell sizes, which, together with tissue properties that determine auxin transport, induces higher auxin levels in the pericycle cells on the outside of the curve. The abundance and position of the auxin transporters restricts this response to the zone competent for lateral root formation. The auxin import facilitator, AUX1, is up-regulated by auxin, resulting in additional local auxin import, thus creating a new auxin maximum that triggers organ formation. Longitudinal spacing of lateral roots is modulated by PIN proteins that promote auxin efflux, and pin2,3,7 triple mutants show impaired lateral inhibition. Thus, lateral root patterning combines a trigger, such as cell size difference due to bending, with a self-organizing system that mediates alterations in auxin transport.en_US
dc.publisherPublic Library of Scienceen_US
dc.identifier.doi10.1371/journal.pbio.0060307-
dc.subject.departmentBiologyen_US
dc.titleRoot System Architecture from Coupling Cell Shape to Auxin Transporten_US
dc.typearticleen_US
dc.identifier.journalPlos Biologyen_US
dc.identifier.volume6en_US
dc.identifier.issue12en_US
dc.identifier.startpage307en_US
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