Lateral relocation of auxin efflux regulator PIN3 mediates tropism in Arabidopsis

Friml, Jiři; Wiśniewska, Justyna; Benková, Eva; Mendgen, Kurt; Palme, Klaus

Lateral relocation of auxin efflux regulator PIN3 mediates tropism in Arabidopsis

Dateien

186_friml02.pdfGröße: 457.02 KBDownloads: 1982

Datum

2002

Autor:innen

Friml, Jiři

Wiśniewska, Justyna

Benková, Eva

Mendgen, Kurt

Palme, Klaus

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Nature. 2002, 415(6873), pp. 806-809. ISSN 0028-0836. Available under: doi: 10.1038/415806a

Zusammenfassung

Long-standing models propose that plant growth responses to light or gravity are mediated by asymmetric distribution of the phytohormone auxin1 3. Physiological studies implicated a specific transport system that relocates auxin laterally, thereby effecting differential growth4; however, neither the molecular components of this system nor the cellular mechanism of auxin redistribution on light or gravity perception have been identified. Here, we show that auxin accumulates asymmetrically during differential growth in an efflux-dependent manner. Mutations in the Arabidopsis gene PIN3, a regulator of auxin efflux, alter differential growth. PIN3 is expressed in gravity-sensing tissues, with PIN3 protein accumulating predominantly at the lateral cell surface. PIN3 localizes to the plasma membrane and to vesicles that cycle in an actin-dependent manner. In the root columella, PIN3 is positioned symmetrically at the plasma membrane but rapidly relocalizes laterally on gravity stimulation. Our data indicate that PIN3 is a component of the lateral auxin transport system regulating tropic growth. In addition, actin-dependent relocalization of PIN3 in response to gravity provides a mechanism for redirecting auxin flux to trigger asymmetric growth.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

tropism, Arabidopsis, PIN3

Zitieren

ISO 690

FRIML, Jiři, Justyna WIŚNIEWSKA, Eva BENKOVÁ, Kurt MENDGEN, Klaus PALME, 2002. Lateral relocation of auxin efflux regulator PIN3 mediates tropism in Arabidopsis. In: Nature. 2002, 415(6873), pp. 806-809. ISSN 0028-0836. Available under: doi: 10.1038/415806a

BibTex

@article{Friml2002Later-6821,
  year={2002},
  doi={10.1038/415806a},
  title={Lateral relocation of auxin efflux regulator PIN3 mediates tropism in Arabidopsis},
  number={6873},
  volume={415},
  issn={0028-0836},
  journal={Nature},
  pages={806--809},
  author={Friml, Jiři and Wiśniewska, Justyna and Benková, Eva and Mendgen, Kurt and Palme, Klaus}
}

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Universitätsbibliographie

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