Number of the records: 1
BRX promotes Arabidopsis shoot growth
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SYSNO ASEP 0351019 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title BRX promotes Arabidopsis shoot growth Author(s) Beuchat, J. (CH)
Scacchi, E. (CH)
Tarkowská, Danuše (UEB-Q) RID, ORCID
Ragni, L. (CH)
Strnad, Miroslav (UEB-Q) RID, ORCID
Hardtke, C.S. (CH)Source Title New Phytologist - ISSN 0028-646X
Roč. 188, č. 1 (2010), s. 23-29Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords Arabidopsis ; auxin ; brassinosteroid Subject RIV CC - Organic Chemistry R&D Projects IAA400550801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z50380511 - UEB-Q (2005-2011) UT WOS 000281551500008 DOI 10.1111/j.1469-8137.2010.03387.x Annotation BREVIS RADIX (BRX) has been identified through a loss-of-function allele in the Umkirch-1 accession in a natural variation screen for Arabidopsis root growth vigor. Physiological and gene expression analyses have suggested that BRX is rate limiting for auxin-responsive gene expression by mediating cross-talk with the brassinosteroid pathway, as impaired root growth and reduced auxin perception of brx can be (partially) rescued by external brassinosteroid application. Using genetic tools, we show that brx mutants also display significantly reduced cotyledon and leaf growth. Furthermore, reciprocal grafting experiments between mutant and complemented brx shoot scions and root stocks suggest that the shoot phenotypes are not an indirect consequence of the root phenotype. In summary, our results demonstrate a ubiquitous, although quantitatively variable role of BRX in modulating the growth rate in both the root and shoot. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2011
Number of the records: 1