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

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

Abstract

We provide a comprehensive expression map of the different genes (TIR1/AFBs, ARFs and Aux/IAAs) involved in the signalling pathway regulating gene transcription in response to auxin in the shoot apical meristem (SAM).We demonstrate a relatively simple structure of this pathway using a high-throughput yeast two-hybrid approach to obtain the Aux/IAA-ARF full interactome.The topology of the signalling network was used to construct a model for auxin signalling and to predict a role for the spatial regulation of auxin signalling in patterning of the SAM.We used a new sensor to monitor the input in the auxin signalling pathway and to confirm the model prediction, thus demonstrating that auxin signalling is essential to create robust patterns at the SAM

Topics: Article
Publisher: Nature Publishing Group
OAI identifier: oai:pubmedcentral.nih.gov:3167386
Provided by: PubMed Central

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