Neighbor Detection Induces Organ-Specific Transcriptomes, Revealing Patterns Underlying Hypocotyl-Specific Growth.

Détails

Ressource 1Télécharger: 2889.full.pdf (1450.25 [Ko])
Etat: Serval
Version: Final published version
ID Serval
serval:BIB_0CB9EAE2BE05
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Neighbor Detection Induces Organ-Specific Transcriptomes, Revealing Patterns Underlying Hypocotyl-Specific Growth.
Périodique
The Plant cell
Auteur(s)
Kohnen M.V., Schmid-Siegert E., Trevisan M., Petrolati L.A., Sénéchal F., Müller-Moulé P., Maloof J., Xenarios I., Fankhauser C.
ISSN
1532-298X (Electronic)
ISSN-L
1040-4651
Statut éditorial
Publié
Date de publication
12/2016
Peer-reviewed
Oui
Volume
28
Numéro
12
Pages
2889-2904
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
In response to neighbor proximity, plants increase the growth of specific organs (e.g., hypocotyls) to enhance access to sunlight. Shade enhances the activity of Phytochrome Interacting Factors (PIFs) by releasing these bHLH transcription factors from phytochrome B-mediated inhibition. PIFs promote elongation by inducing auxin production in cotyledons. In order to elucidate spatiotemporal aspects of the neighbor proximity response, we separately analyzed gene expression patterns in the major light-sensing organ (cotyledons) and in rapidly elongating hypocotyls of Arabidopsis thaliana PIFs initiate transcriptional reprogramming in both organs within 15 min, comprising regulated expression of several early auxin response genes. This suggests that hypocotyl growth is elicited by both local and distal auxin signals. We show that cotyledon-derived auxin is both necessary and sufficient to initiate hypocotyl growth, but we also provide evidence for the functional importance of the local PIF-induced response. With time, the transcriptional response diverges increasingly between organs. We identify genes whose differential expression may underlie organ-specific elongation. Finally, we uncover a growth promotion gene expression signature shared between different developmentally regulated growth processes and responses to the environment in different organs.

Mots-clé
Arabidopsis/genetics, Arabidopsis/metabolism, Arabidopsis Proteins/genetics, Basic Helix-Loop-Helix Transcription Factors/genetics, Cotyledon/genetics, Cotyledon/metabolism, Gene Expression Regulation, Plant/genetics, Transcriptome/genetics
Pubmed
Web of science
Open Access
Oui
Création de la notice
12/12/2016 19:14
Dernière modification de la notice
08/05/2019 14:20
Données d'usage