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A regulated auxin minimum is required for seed dispersal in Arabidopsis

Author

Listed:
  • Karim Sorefan

    (John Innes Centre, Norwich Research Park, Colney Lane, Norwich, Norfolk NR4 7UH, UK)

  • Thomas Girin

    (John Innes Centre, Norwich Research Park, Colney Lane, Norwich, Norfolk NR4 7UH, UK)

  • Sarah J. Liljegren

    (Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA
    University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA)

  • Karin Ljung

    (Umeå Plant Science Centre)

  • Pedro Robles

    (Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA
    División de Genética e Instituto de Bioingeniería, Universidad Miguel Hernández, Campus de Elche, 03202, Alicante, Spain)

  • Carlos S. Galván-Ampudia

    (Institute of Biology, Leiden University, Wassenaarseweg 64, 2333 AL Leiden, The Netherlands)

  • Remko Offringa

    (Institute of Biology, Leiden University, Wassenaarseweg 64, 2333 AL Leiden, The Netherlands)

  • Jiří Friml

    (VIB, Ghent University)

  • Martin F. Yanofsky

    (Section of Cell and Developmental Biology, University of California at San Diego, La Jolla, California 92093-0116, USA)

  • Lars Østergaard

    (John Innes Centre, Norwich Research Park, Colney Lane, Norwich, Norfolk NR4 7UH, UK)

Abstract

Cell fate determined by hormonal minima The concept of local accumulation and concentration gradients of plant or animal hormones in organ development or tissue patterning is a familiar one. Now a study of the seed dispersal mechanism in Arabidopsis thaliana introduces a new concept: a regulated minimum level of a cell-signalling molecule as a determinant of cell fate. During seed dispersal A. thaliana fruits split open (or dehisce) along the valve margins. The transcription factor INDEHISCENT (IND) is known to be important for differentiation of valve margin cells. IND is now shown to produce an auxin minimum by controlling the expression of auxin efflux carriers, and it is the existence of this auxin minimum that specifies the valve margin separation layer than allows the fruit to open. The relative simplicity of forming and maintaining local hormone minima suggests that it might be more general method with which to seal the fate of small groups of cells.

Suggested Citation

  • Karim Sorefan & Thomas Girin & Sarah J. Liljegren & Karin Ljung & Pedro Robles & Carlos S. Galván-Ampudia & Remko Offringa & Jiří Friml & Martin F. Yanofsky & Lars Østergaard, 2009. "A regulated auxin minimum is required for seed dispersal in Arabidopsis," Nature, Nature, vol. 459(7246), pages 583-586, May.
    • Handle: RePEc:nat:nature:v:459:y:2009:i:7246:d:10.1038_nature07875
    DOI: 10.1038/nature07875
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    Cited by:

    1. Christian Luschnig & Jiří Friml, 2024. "Over 25 years of decrypting PIN-mediated plant development," Nature Communications, Nature, vol. 15(1), pages 1-12, December.

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