Auxin Transporters—Why So Many?

  1. Petr Hošek1,3
  1. 1Institute of Experimental Botany AS CR, Rozvojová 263, CZ-165 02 Prague 6, Czech Republic
  2. 2Department of Horticulture, Purdue University, West Lafayette, Indiana 47907-2010
  3. 3Department of Biomedical Informatics, Faculty of Biomedical Engineering, Czech Technical University in Prague, Sítná 3105, CZ-272 01 Kladno, Czech Republic
  1. Correspondence: zazimalova{at}ueb.cas.cz

Abstract

Interacting and coordinated auxin transporter actions in plants underlie a flexible network that mobilizes auxin in response to many developmental and environmental changes encountered by these sessile organisms. The independent but synergistic activity of individual transporters can be differentially regulated at various levels. This invests auxin transport mechanisms with robust functional redundancy and added auxin flow capacity when needed. An evolutionary perspective clarifies the roles of the different transporter groups in plant development. Mathematical and functional analysis of elements of auxin transport makes it possible to rationalize the relative contributions of members of the respective transporter classes to the localized auxin transport streams that then underlie both preprogrammed developmental changes and reactions to environmental stimuli.

Footnotes

  • Editors: Mark Estelle, Dolf Weijers, Karin Ljung, and Ottoline Leyser

  • Additional Perspectives on Auxin Signaling available at www.cshperspectives.org



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      1. Cold Spring Harb. Perspect. Biol. 2: a001552 Copyright © 2010 Cold Spring Harbor Laboratory Press; all rights reserved

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