Number of the records: 1  

7-Rhamnosylated Flavonols Modulate Homeostasis of the Plant Hormone Auxin and Affect Plant Development

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    SYSNO ASEP0459350
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    Title7-Rhamnosylated Flavonols Modulate Homeostasis of the Plant Hormone Auxin and Affect Plant Development
    Author(s) Kuhn, B.M. (CH)
    Errafi, S. (CH)
    Bucher, R. (CH)
    Dobrev, Petre (UEB-Q) RID, ORCID
    Geisler, M. (CH)
    Bigler, L. (CH)
    Zažímalová, Eva (UEB-Q) RID, ORCID
    Ringli, Ch. (CH)
    Source TitleJournal of Biological Chemistry. - : Elsevier - ISSN 0021-9258
    Roč. 291, č. 10 (2016), s. 5385-5395
    Number of pages11 s.
    Languageeng - English
    CountryUS - United States
    KeywordsArabidopsis thaliana ; auxin ; flavonoid
    Subject RIVEB - Genetics ; Molecular Biology
    R&D ProjectsGAP305/11/0797 GA ČR - Czech Science Foundation (CSF)
    Institutional supportUEB-Q - RVO:61389030
    UT WOS000371640600046
    DOI10.1074/jbc.M115.701565
    AnnotationFlavonols are a group of secondary metabolites that affect diverse cellular processes. They are considered putative negative regulators of the transport of the phytohormone auxin, by which they influence auxin distribution and concomitantly take part in the control of plant organ development. Flavonols are accumulating in a large number of glycosidic forms. Whether these have distinct functions and diverse cellular targets is not well understood. The rol1-2 mutant of Arabidopsis thaliana is characterized by a modified flavonol glycosylation profile that is inducing changes in auxin transport and growth defects in shoot tissues. To determine whether specific flavonol glycosides are responsible for these phenotypes, a suppressor screen was performed on the rol1-2 mutant, resulting in the identification of an allelic series of UGT89C1, a gene encoding a flavonol 7-O-rhamnosyltransferase. A detailed analysis revealed that interfering with flavonol rhamnosylation increases the concentration of auxin precursors and auxin metabolites, whereas auxin transport is not affected. This finding provides an additional level of complexity to the possible ways by which flavonols influence auxin distribution and suggests that flavonol glycosides play an important role in regulating plant development.
    WorkplaceInstitute of Experimental Botany
    ContactDavid Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469
    Year of Publishing2017
Number of the records: 1  

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