The auxin signalling network translates dynamic input into robust patterning at the shoot apex

Vernoux, Teva; Brunoud, Géraldine; Farcot, Etienne; Morin, Valérie; Van Den Daele, Hilde; Legrand, Jonathan; Oliva, Marina; Das, Pradeep; Larrieu, Antoine; Wells, Darren; Guédon, Yann; Armitage, Lynne; Picard, Franck; Guyomarc'H, Soazig; Cellier, Coralie; Parry, Geraint; Koumproglou, Rachil; Doonan, John H.; Estelle, Mark; Godin, Christophe; Kepinski, Stefan; Bennett, Malcolm; De Veylder, Lieven; Traas, Jan

Abstract

The plant hormone auxin is thought to provide positional information for patterning during development. It is still unclear, however, precisely how auxin is distributed across tissues and how the hormone is sensed in space and time. The control of gene expression in response to auxin involves a complex network of over 50 potentially interacting transcriptional activators and repressors, the auxin response factors (ARFs) and Aux/IAAs. Here, we perform a large-scale analysis of the Aux/IAA-ARF pathway in the shoot apex of Arabidopsis, where dynamic auxin-based patterning controls organogenesis. A comprehensive expression map and full interactome uncovered an unexpectedly simple distribution and structure of this pathway in the shoot apex. A mathematical model of the Aux/IAA-ARF network predicted a strong buffering capacity along with spatial differences in auxin sensitivity. We then tested and confirmed these predictions using a novel auxin signalling sensor that reports input into the signalling pathway, in conjunction with the published DR5 transcriptional output reporter. Our results provide evidence that the auxin signalling network is essential to create robust patterns at the shoot apex. © 2011 EMBO and Macmillan Publishers Limited.

Citation

Vernoux, T., Brunoud, G., Farcot, E., Morin, V., Van Den Daele, H., Legrand, J., Oliva, M., Das, P., Larrieu, A., Wells, D., Guédon, Y., Armitage, L., Picard, F., Guyomarc'H, S., Cellier, C., Parry, G., Koumproglou, R., Doonan, J. H., Estelle, M., Godin, C., …Traas, J. (2011). The auxin signalling network translates dynamic input into robust patterning at the shoot apex. Molecular Systems Biology, 7(1), Article 508. https://doi.org/10.1038/msb.2011.39

• Journal Article Type: Article
• Acceptance Date: May 18, 2011
• Online Publication Date: Jul 5, 2011
• Publication Date: Jul 13, 2011
• Deposit Date: Nov 18, 2024
• Publicly Available Date: Dec 4, 2024
• Journal: Molecular Systems Biology
• Electronic ISSN: 1744-4292
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 7
• Issue: 1
• Article Number: 508
• DOI: https://doi.org/10.1038/msb.2011.39
• Public URL: https://nottingham-repository.worktribe.com/output/3093058
• Publisher URL: https://www.embopress.org/doi/full/10.1038/msb.2011.39