HFR1, a putative bHLH transcription factor, mediates both phytochrome A and cryptochrome signalling.

Détails

ID Serval
serval:BIB_4140E9E07FDD
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
HFR1, a putative bHLH transcription factor, mediates both phytochrome A and cryptochrome signalling.
Périodique
Plant Journal
Auteur(s)
Duek P.D., Fankhauser C.
ISSN
0960-7412[print], 0960-7412[linking]
Statut éditorial
Publié
Date de publication
06/2003
Volume
34
Numéro
6
Pages
827-836
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
Plants are very sensitive to their light environment. They use cryptochromes and phytochromes to scan the light spectrum. Those two families of photoreceptors mediate a number of similar physiological responses. The putative bHLH (basic Helix Loop Helix) transcription factor long hypocotyl in far-red (HFR1) is important for a subset of phytochrome A (phyA)-mediated light responses. Interestingly, hfr1 alleles also have reduced de-etiolation responses, including hypocotyl growth, cotyledon opening and anthocyanin accumulation, when grown in blue light. This phenotype is particularly apparent under high fluence rates. The analysis of double mutants between hfr1 and different blue light photoreceptor mutants demonstrates that, in addition to its role in phyA signalling, HFR1 is a component of cryptochrome 1 (cry1)-mediated light signalling. Moreover, HFR1 mRNA levels are high both in blue and in far-red light but low in red light. These results identify HFR1 as a positively acting component of cry1 signalling and indicate that HFR1 integrates light signals from both phyA and cry1.
Mots-clé
Arabidopsis/genetics, Arabidopsis/metabolism, Arabidopsis Proteins, Color, Cryptochromes, DNA-Binding Proteins/genetics, DNA-Binding Proteins/metabolism, Drosophila Proteins, Eye Proteins, Flavoproteins/pharmacology, Gene Expression Regulation, Plant/radiation effects, Helix-Loop-Helix Motifs, Light, Nuclear Proteins/genetics, Nuclear Proteins/metabolism, Phenotype, Photoreceptor Cells, Invertebrate, Phytochrome/pharmacology, Phytochrome A, Plant Proteins/genetics, Plant Proteins/metabolism, RNA, Messenger/analysis, RNA, Messenger/metabolism, Receptors, G-Protein-Coupled, Signal Transduction/drug effects, Signal Transduction/radiation effects, Transcription Factors/metabolism
Pubmed
Web of science
Open Access
Oui
Création de la notice
24/01/2008 16:29
Dernière modification de la notice
08/05/2019 17:39
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