Verification at the protein level of the PIF4-mediated external coincidence model for the temperature-adaptive photoperiodic control of plant growth in Arabidopsis thaliana.

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Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_8EABEC2C783F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Verification at the protein level of the PIF4-mediated external coincidence model for the temperature-adaptive photoperiodic control of plant growth in Arabidopsis thaliana.
Périodique
Plant Signaling and Behavior
Auteur(s)
Yamashino T., Nomoto Y., Lorrain S., Miyachi M., Ito S., Nakamichi N., Fankhauser C., Mizuno T.
ISSN
1559-2324 (Electronic)
ISSN-L
1559-2316
Statut éditorial
Publié
Date de publication
2013
Volume
8
Numéro
3
Pages
e23390
Langue
anglais
Résumé
Plant circadian clock controls a wide variety of physiological and developmental events, which include the short-days (SDs)-specific promotion of the elongation of hypocotyls during de-etiolation and also the elongation of petioles during vegetative growth. In A. thaliana, the PIF4 gene encoding a phytochrome-interacting basic helix-loop-helix (bHLH) transcription factor plays crucial roles in this photoperiodic control of plant growth. According to the proposed external coincidence model, the PIF4 gene is transcribed precociously at the end of night specifically in SDs, under which conditions the protein product is stably accumulated, while PIF4 is expressed exclusively during the daytime in long days (LDs), under which conditions the protein product is degraded by the light-activated phyB and also the residual proteins are inactivated by the DELLA family of proteins. A number of previous reports provided solid evidence to support this coincidence model mainly at the transcriptional level of the PIF 4 and PIF4-traget genes. Nevertheless, the diurnal oscillation profiles of PIF4 proteins, which were postulated to be dependent on photoperiod and ambient temperature, have not yet been demonstrated. Here we present such crucial evidence on PIF4 protein level to further support the external coincidence model underlying the temperature-adaptive photoperiodic control of plant growth in A. thaliana.
Pubmed
Création de la notice
06/02/2014 15:22
Dernière modification de la notice
03/03/2018 19:19
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