TEMPRANILLO genes link photoperiod and gibberellin pathways to control flowering in Arabidopsis

Michela Osnato, Cristina Castillejo, Luis Matías-Hernández and Soraya Pelaz ()
Additional contact information
Michela Osnato: Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Parc de Recerca UAB, Bellaterra (Cerdanyola del Vallés)
Cristina Castillejo: Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Parc de Recerca UAB, Bellaterra (Cerdanyola del Vallés)
Luis Matías-Hernández: Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Parc de Recerca UAB, Bellaterra (Cerdanyola del Vallés)
Soraya Pelaz: Centre for Research in Agricultural Genomics, CSIC-IRTA-UAB-UB, Parc de Recerca UAB, Bellaterra (Cerdanyola del Vallés)

Nature Communications, 2012, vol. 3, issue 1, 1-8

Abstract: Abstract In Arabidopsis, FLOWERING LOCUS T (FT) promotes flowering in response to long days in the photoperiod pathway, while signalling downstream gibberellin (GA) perception is critical for flowering under short days. Previously we have established that the TEMPRANILLO (TEM) genes have a pivotal role in the direct repression of FT. Here we show that TEM genes directly regulate the expression of the GA4 biosynthetic genes GA 3–oxidase1 and 2 (GA3OX1 and GA3OX2). Plants overexpressing TEM genes resemble GA-deficient mutants, and conversely, TEM downregulation give rise to elongated hypocotyls perhaps as a result of an increase in GA content. We consistently find that TEM1 represses GA3OX1 and GA3OX2 by directly binding a regulatory region positioned in the first exon. Our results indicate that TEM genes seem to link the photoperiod and GA-dependent flowering pathways, controlling floral transition under inductive and non-inductive day lengths through the regulation of the floral integrators.

Date: 2012
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/ncomms1810 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1810

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms1810

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().