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Polar auxin transport — old questions and new concepts?

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Auxin Molecular Biology

Abstract

Polar auxin transport controls multiple aspects of plant development including differential growth, embryo and root patterning and vascular tissue differentiation. Identification of proteins involved in this process and availability of new tools enabling’ visualization’ of auxin and auxin routes in planta largely contributed to the significant progress that has recently been made. New data support classical concepts, but several recent findings are likely to challenge our view on the mechanism of auxin transport. The aim of this review is to provide a comprehensive overview of the polar auxin transport field. It starts with classical models resulting from physiological studies, describes the genetic contributions and discusses the molecular basis of auxin influx and efflux. Finally, selected questions are presented in the context of developmental biology, integrating available data from different fields.

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Abbreviations

AEI:

auxin efflux inhibitors

agr:

agravitropic

ARF:

auxin response factor

ARF GEF:

guanine nucleotide exchange factor on ADP-ribosylation factor G protein

BFA:

Brefeldin A

eir:

ethylene-insensitive root

IAA:

indole-3-acetic acid

1-NAA:

1-naphtylacetic acid

NPA:

1-N-naphthylphthalamic acid

PAT:

polar auxin transport

rcnl:

roots curl in NPA

TIBA:

2,3,5’-triiodobenzoic acid

tir:

transport inhibitor response

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Authors and Affiliations

  1. Zentrum für Molekularbiologie der Pflanzen, Universität Tübingen, Auf der Morgenstelle 3, 72076, Tübingen, Germany

    Jiří Friml

  2. Department of Biochemistry, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic

    Jiří Friml

  3. Max-Delbrück-Laboratorium in der Max-Planck-Gesellschaft, Carl-von-Linné-Weg 10, 50829, Köln, Germany

    Klaus Palme

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Catherine Perrot-Rechenmann Gretchen Hagen

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Friml, J., Palme, K. (2002). Polar auxin transport — old questions and new concepts?. In: Perrot-Rechenmann, C., Hagen, G. (eds) Auxin Molecular Biology. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0377-3_2

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  • DOI: https://doi.org/10.1007/978-94-010-0377-3_2

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