Irish
Albanian
Arabic
Armenian
Azerbaijani
Belarusian
Bengali
Bosnian
Catalan
Czech
Danish
Deutsch
Dutch
English
Estonian
Finnish
Français
Greek
Haitian Creole
Hebrew
Hindi
Hungarian
Icelandic
Indonesian
Irish
Italian
Japanese
Korean
Latvian
Lithuanian
Macedonian
Mongolian
Norwegian
Persian
Polish
Portuguese
Romanian
Russian
Serbian
Slovak
Slovenian
Spanish
Swahili
Swedish
Turkish
Ukrainian
Vietnamese
Български
中文(简体)
中文(繁體)
Plant Physiology 2006-Oct

Transcriptional regulation of gibberellin metabolism genes by auxin signaling in Arabidopsis.

Ní féidir ach le húsáideoirí cláraithe ailt a aistriú
Logáil Isteach / Cláraigh
Sábháiltear an nasc chuig an gearrthaisce
Martín Frigerio
David Alabadí
José Pérez-Gómez
Laura García-Cárcel
Andrew L Phillips
Peter Hedden
Miguel A Blázquez

Keywords

Coimriú

Auxin and gibberellins (GAs) overlap in the regulation of multiple aspects of plant development, such as root growth and organ expansion. This coincidence raises questions about whether these two hormones interact to regulate common targets and what type of interaction occurs in each case. Auxins induce GA biosynthesis in a range of plant species. We have undertaken a detailed analysis of the auxin regulation of expression of Arabidopsis (Arabidopsis thaliana) genes encoding GA 20-oxidases and GA 3-oxidases involved in GA biosynthesis, and GA 2-oxidases involved in GA inactivation. Our results show that auxin differentially up-regulates the expression of various genes involved in GA metabolism, in particular several AtGA20ox and AtGA2ox genes. Up-regulation occurred very quickly after auxin application; the response was mimicked by incubations with the protein synthesis inhibitor cycloheximide and was blocked by treatments with the proteasome inhibitor MG132. The effects of auxin treatment reflect endogenous regulation because equivalent changes in gene expression were observed in the auxin overproducer mutant yucca. The results suggest direct regulation of the expression of GA metabolism genes by Aux/IAA and ARF proteins. The physiological relevance of this regulation is supported by the observation that the phenotype of certain gain-of-function Aux/IAA alleles could be alleviated by GA application, which suggests that changes in GA metabolism mediate part of auxin action during development.

Bí ar ár
leathanach facebook

An bunachar luibheanna míochaine is iomláine le tacaíocht ón eolaíocht

  • Oibreacha i 55 teanga
  • Leigheasanna luibhe le tacaíocht ón eolaíocht
  • Aitheantas luibheanna de réir íomhá
  • Léarscáil GPS idirghníomhach - clibeáil luibheanna ar an láthair (ag teacht go luath)
  • Léigh foilseacháin eolaíochta a bhaineann le do chuardach
  • Cuardaigh luibheanna míochaine de réir a n-éifeachtaí
  • Eagraigh do chuid spéiseanna agus fanacht suas chun dáta leis an taighde nuachta, trialacha cliniciúla agus paitinní

Clóscríobh symptom nó galar agus léigh faoi luibheanna a d’fhéadfadh cabhrú, luibh a chlóscríobh agus galair agus comharthaí a úsáidtear ina choinne a fheiceáil.
* Tá an fhaisnéis uile bunaithe ar thaighde eolaíoch foilsithe

Google Play badgeApp Store badge