Titre

PHYTOCHROME INTERACTING FACTOR 7 is important for early responses to elevated temperature in Arabidopsis seedlings.

Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Fiorucci, A.S.
Auteure/Auteur
Galvão, V.C.
Auteure/Auteur
Ince, Y.Ç.
Auteure/Auteur
Boccaccini, A.
Auteure/Auteur
Goyal, A.
Auteure/Auteur
Allenbach Petrolati, L.
Auteure/Auteur
Trevisan, M.
Auteure/Auteur
Fankhauser, C.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1469-8137
Statut éditorial
Publié
Date de publication
2020-04
Volume
226
Numéro
1
Première page
50
Dernière page/numéro d’article
58
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
In response to elevated ambient temperature Arabidopsis thaliana seedlings display a thermomorphogenic response that includes elongation of hypocotyls and petioles. Phytochrome B and cryptochrome 1 are two photoreceptors also playing a role in thermomorphogenesis. Downstream of both environmental sensors PHYTOCHROME INTERACTING FACTOR 4 (PIF4) is essential to trigger this response at least in part through the production of the growth promoting hormone auxin. Using a genetic approach, we identified PHYTOCHROME INTERACTING FACTOR 7 (PIF7) as a novel player for thermomorphogenesis and compared the phenotypes of pif7 and pif4 mutants. We investigated the role of PIF7 during temperature-regulated gene expression and the regulation of PIF7 transcript and protein by temperature. Furthermore, pif7 and pif4 loss-of-function mutants were similarly unresponsive to increased temperature. This included hypocotyl elongation and induction of genes encoding auxin biosynthetic or signalling proteins. PIF7 bound to the promoters of auxin biosynthesis and signalling genes. In response to temperature elevation PIF7 transcripts decreased while PIF7 protein levels increased rapidly. Our results reveal the importance of PIF7 for thermomorphogenesis and indicate that PIF7 and PIF4 likely depend on each other possibly by forming heterodimers. Elevated temperature rapidly enhances PIF7 protein accumulation, which may contribute to the thermomorphogenic response.
Sujets

Arabidopsis thaliana

PIF4

PIF7

auxin

thermomorphogenesis

Arabidopsis thaliana

PID Serval
serval:BIB_92E92D6C051E
DOI
PMID
WOS
Permalien
Open Access
Oui
Date de création
2020-01-16T16:46:02.940Z
Date de création dans IRIS
2025-05-20T21:33:35Z
Fichier(s)
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Vignette d'image
Nom

Fiorucci_et_al-2019-New_Phytologist.pdf

Version du manuscrit

preprint

Licence

https://creativecommons.org/licenses/by/4.0

Taille

1.75 MB

Format

Adobe PDF

PID Serval

serval:BIB_92E92D6C051E.P001

Somme de contrôle

(MD5):02123176047ba470201df1da2a1f4c9a