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From Auxin Transport to Patterning

  • Marina Oliva
  • Teva Vernoux
  • Jan TraasEmail author
Chapter
Part of the Signaling and Communication in Plants book series (SIGCOMM, volume 17)

Abstract

The phytohormone auxin is often observed to be asymmetrically distributed across tissues and regulate crucial events of plant development. These gradients are generated by a network of polarly localized membrane-bound transporters, called PIN-FORMED (PIN) proteins. Understanding how auxin controls patterning in plants comes to define how polar auxin transport is regulated to form gradients and how these gradients will be, in turn, interpreted by cells. The long-standing belief that auxin regulates its own transport via a positive feedback loop has led to the establishment of different theoretical models for auxin-dependent patterning processes that are tested in silico. Most of these simulation models are able to reproduce patterns observed in planta and have been crucial to predict and test the behavior of the PIN network in several developmental processes. Here, we review computational approaches to describe PIN polarization together with recent experimental data on PIN polar targeting, which can explain the patterned distribution of auxin throughout tissues. We also discuss how auxin gradients are perceived by the downstream signaling pathway and transduced to generate specific cellular responses.

Keywords

Shoot Apical Meristem Auxin Transport Auxin Response Auxin Concentration Auxin Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Laboratory of Plant Reproduction and DevelopmentENS-Lyon, CNRS, INRALyon cedex 07France

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