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Arabidopsis NAC transcription factor JUB1 regulates GA/BR metabolism and signalling
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SYSNO ASEP 0467800 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Arabidopsis NAC transcription factor JUB1 regulates GA/BR metabolism and signalling Author(s) Shahnejat-Bushehri, S. (DE)
Tarkowská, Danuše (UEB-Q) RID, ORCID
Sakuraba, Y. (KR)
Balazadeh, S. (DE)Number of authors 4 Article number 16013 Source Title Nature Plants - ISSN 2055-026X
Roč. 2, č. 3 (2016)Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords gibberellins ; brassinosteroids ; signalling Subject RIV EF - Botanics R&D Projects LK21306 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LO1204 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA14-34792S GA ČR - Czech Science Foundation (CSF) Institutional support UEB-Q - RVO:61389030 UT WOS 000427242400001 EID SCOPUS 84976465699 DOI 10.1038/NPLANTS.2016.13 Annotation Gibberellins (GAs) and brassinosteroids (BRs) are important phytohormones that control plant development and responses to environmental cues by involving DELLA proteins and BRASSINAZOLE-RESISTANT1 (BZR1) respectively as key transcription factors. Here, we reveal a new role for JUNGBRUNNEN1 (JUB1) as a transcriptional regulator of GA/BR signalling in Arabidopsis thaliana. JUB1 directly represses the hormone biosynthesis genes GA3ox1 and DWARF4 (DWF4), leading to reduced levels of GAs and BRs and typical GA/BR deficiency phenotypes exhibiting short hypocotyls, dwarfism, late flowering and male sterility. JUB1 also directly represses PHYTOCHROME INTERACTING FACTOR4 (PIF4), a transcription factor connecting hormonal and environmental stimuli. On the other hand, JUB1 activates the DELLA genes GA INSENSITIVE (GAI) and RGA-LIKE 1 (RGL1). In addition, BZR1 and PIF4 act as direct transcriptional repressors upstream of JUB1, establishing a negative feedback loop. Thus, JUB1 forms the core of a robust regulatory module that triggers DELLA accumulation, thereby restricting cell elongation while concomitantly enhancing stress tolerance. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2017
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