Effects of shoot-applied gibberellin/gibberellin-biosynthesis inhibitors on root growth and expression of gibberellin biosynthesis genes in arabidopsis thaliana

Haniyeh Bidadi, Shinjiro Yamaguchi, Masashi Asahina, Shinobu Satoh

    Research output: Contribution to journalArticle

    19 Citations (Scopus)

    Abstract

    To elucidate the involvement of gibberellin (GA) in the growth regulation of Arabidopsis roots, effects of shoot-applied GA and GA-biosynthesis inhibitors on the root were examined. Applying GA to the shoot of Arabidopsis slightly enhanced the primary root elongation. Treating shoots with uniconazole, a GA biosynthesis inhibitor, also resulted in enhancement of primary root elongation, while shoots treated with uniconazole were stunted and bolting was delayed. Analysis of the expression of GA3ox and GA20ox confirmed the up-regulation of these genes in roots following the inhibitor application to shoots. The results suggest that the inhibition of GA-biosynthesis enhances the production of bioactive GAs in roots and promotes root elongation.

    Original languageEnglish
    Pages (from-to)4-11
    Number of pages8
    JournalPlant Root
    Volume4
    DOIs
    Publication statusPublished - 2010

    Keywords

    • Arabidopsis
    • Branching
    • Gibberellin
    • Primary root elongation

    ASJC Scopus subject areas

    • Agronomy and Crop Science
    • Biochemistry, Genetics and Molecular Biology(all)
    • Plant Science

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