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  • Rapid auxin-induced root growth inhibition requires the TIR and AFB auxin receptors.

    Author(s) : Scheitz, K.Lüthen, H.Schenck, D.

    Author Affiliation : Department of Plant Physiology, Biozentrum Flottbek of the University, Ohnhorststrasse 18, 22609, Hamburg, Germany.

    Author Email : h.luthen@botanik.uni-hamburg.de

    Journal article : Planta 2013 Vol.238 No.6 pp.1171-1176 ref.19

    Abstract : We investigated the relation between auxin-induced gene expressiongene expressionSubject Category: Miscellaneous
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    and the rapid auxin-induced growth inhibitioninhibitionSubject Category: Miscellaneous
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    in Arabidopsis thalianaarabidopsis thalianaSubject Category: Organism Names
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    rootsrootsSubject Category: Anatomical and Morphological Structures
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    . The natural auxin indole-3-acetic acid (IAAiaaSubject Category: Chemicals and Chemical Groups
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    ) induced a strong activation of gene expression as visualized by the DR5rev::GFP reporter gene technique. This effect was specific for active auxinsauxinsSubject Category: Chemicals and Chemical Groups
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    and was abolished in knockout mutantsmutantsSubject Category: Miscellaneous
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    of the F-box auxin receptorsreceptorsSubject Category: Anatomical and Morphological Structures
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    . We measured the IAA-induced growth inhibition at high time resolution and show that the F-box auxin receptor mutants failed to display this effect. We conclude that the F-box auxin receptors are needed for the response. In hypocotylshypocotylsSubject Category: Anatomical and Morphological Structures
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    , auxin induces an increase in elongation growth, and this effect has been earlier shown to be independent of the F-box receptors. Based on these findings, we discuss differences in the growth control modes in roots and shootsshootsSubject Category: Anatomical and Morphological Structures
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    . We demonstrate that the rapid auxin-induced root growth inhibition, unlike the inductioninductionSubject Category: Miscellaneous
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    of growth in hypocotyls, requires the presence of the F-box auxin receptors.

    ISSN : 0032-0935

    DOI : 10.1007/s00425-013-1941-x

    Record Number : 20133414666

    Publisher : Springer Berlin

    Location of publication : Heidelberg

    Country of publication : Germany

    Language of text : English

    Indexing terms for this abstract:

    Organism descriptor(s) : ArabidopsisarabidopsisSubject Category: Organism Names
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    , Arabidopsis thalianaarabidopsis thalianaSubject Category: Organism Names
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    , plantsplantsSubject Category: Organism Names
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    Descriptor(s) : auxinsauxinsSubject Category: Chemicals and Chemical Groups
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    , cell growthcell growthSubject Category: Natural Processes
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    , gene expressiongene expressionSubject Category: Miscellaneous
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    , genesgenesSubject Category: Miscellaneous
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    , growthgrowthSubject Category: Natural Processes
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    , hypocotylshypocotylsSubject Category: Anatomical and Morphological Structures
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    , IAAiaaSubject Category: Chemicals and Chemical Groups
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    , inductioninductionSubject Category: Miscellaneous
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    , inhibitioninhibitionSubject Category: Miscellaneous
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    , mutantsmutantsSubject Category: Miscellaneous
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    , mutationsmutationsSubject Category: Miscellaneous
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    , plant developmentplant developmentSubject Category: Natural Processes
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    , plant growth regulatorsplant growth regulatorsSubject Category: Chemicals and Chemical Groups
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    , receptorsreceptorsSubject Category: Anatomical and Morphological Structures
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    , reporter genesreporter genesSubject Category: Miscellaneous
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    , rootsrootsSubject Category: Anatomical and Morphological Structures
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    , shootsshootsSubject Category: Anatomical and Morphological Structures
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    Identifier(s) : cell elongation, indoleacetic acid, indolylacetic acid, plant growth substances, plant hormones, reporter gene

    Broader term(s) : BrassicaceaebrassicaceaeSubject Category: Organism Names
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    , BrassicalesbrassicalesSubject Category: Organism Names
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    , eudicotseudicotsSubject Category: Organism Names
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    , angiospermsangiospermsSubject Category: Organism Names
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    , SpermatophytaspermatophytaSubject Category: Organism Names
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    , plantsplantsSubject Category: Organism Names
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    , eukaryoteseukaryotesSubject Category: Organism Names
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    , ArabidopsisarabidopsisSubject Category: Organism Names
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