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Regulation of Auxin Homeostasis and Gradients in Arabidopsis Roots through the Formation of the Indole-3-Acetic Acid Catabolite 2-Oxindole-3-Acetic Acid
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SYSNO ASEP 0423096 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Regulation of Auxin Homeostasis and Gradients in Arabidopsis Roots through the Formation of the Indole-3-Acetic Acid Catabolite 2-Oxindole-3-Acetic Acid Author(s) Pěnčík, A. (SE)
Simonovik, B. (SE)
Petersson, S.V. (SE)
Hényková, Eva (UEB-Q) ORCID
Simon, Sibu (UEB-Q) ORCID
Greenham, K. (US)
Zhang, Y. (US)
Kowalczyk, M. (SE)
Estelle, M. (US)
Zažímalová, Eva (UEB-Q) RID, ORCID
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Sandberg, G. (SE)
Ljung, K. (SE)Source Title Plant Cell. - : Oxford University Press - ISSN 1040-4651
Roč. 25, č. 10 (2013), s. 3858-3870Number of pages 13 s. Language eng - English Country US - United States Keywords BOX PROTEIN TIR1 ; PLANT DEVELOPMENT ; OXINDOLE-3-ACETIC ACID Subject RIV EB - Genetics ; Molecular Biology R&D Projects GAP305/11/0797 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z50380511 - UEB-Q (2005-2011) UT WOS 000327723100019 DOI 10.1105/tpc.113.114421 Annotation The native auxin, indole-3-acetic acid (IAA), is a major regulator of plant growth and development. Its nonuniform distribution between cells and tissues underlies the spatiotemporal coordination of many developmental events and responses to environmental stimuli. The regulation of auxin gradients and the formation of auxin maxima/minima most likely involve the regulation of both metabolic and transport processes. In this article, we have demonstrated that 2-oxindole-3-acetic acid (oxIAA) is a major primary IAA catabolite formed in Arabidopsis thaliana root tissues. OxIAA had little biological activity and was formed rapidly and irreversibly in response to increases in auxin levels. We further showed that there is cell type-specific regulation of oxIAA levels in the Arabidopsis root apex. We propose that oxIAA is an important element in the regulation of output from auxin gradients and, therefore, in the regulation of auxin homeostasis and response mechanisms. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2014
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