A combination of plasma membrane sterol biosynthesis and autophagy is required for shade-induced hypocotyl elongation.
Détails
Télécharger: 41467_2022_Article_33384.pdf (2309.33 [Ko])
Etat: Public
Version: Final published version
Licence: CC BY 4.0
Etat: Public
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_FC24C76DB11B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
A combination of plasma membrane sterol biosynthesis and autophagy is required for shade-induced hypocotyl elongation.
Périodique
Nature communications
ISSN
2041-1723 (Electronic)
ISSN-L
2041-1723
Statut éditorial
Publié
Date de publication
10/10/2022
Peer-reviewed
Oui
Volume
13
Numéro
1
Pages
5659
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Publication Status: epublish
Résumé
Plant growth ultimately depends on fixed carbon, thus the available light for photosynthesis. Due to canopy light absorption properties, vegetative shade combines low blue (LB) light and a low red to far-red ratio (LRFR). In shade-avoiding plants, these two conditions independently trigger growth adaptations to enhance light access. However, how these conditions, differing in light quality and quantity, similarly promote hypocotyl growth remains unknown. Using RNA sequencing we show that these two features of shade trigger different transcriptional reprogramming. LB induces starvation responses, suggesting a switch to a catabolic state. Accordingly, LB promotes autophagy. In contrast, LRFR induced anabolism including expression of sterol biosynthesis genes in hypocotyls in a manner dependent on PHYTOCHROME-INTERACTING FACTORs (PIFs). Genetic analyses show that the combination of sterol biosynthesis and autophagy is essential for hypocotyl growth promotion in vegetative shade. We propose that vegetative shade enhances hypocotyl growth by combining autophagy-mediated recycling and promotion of specific lipid biosynthetic processes.
Mots-clé
Arabidopsis/metabolism, Arabidopsis Proteins/genetics, Arabidopsis Proteins/metabolism, Autophagy/genetics, Carbon/metabolism, Cell Membrane/metabolism, Gene Expression Regulation, Plant, Hypocotyl/genetics, Light, Lipids, Phytochrome/metabolism, Sterols/metabolism
Pubmed
Web of science
Open Access
Oui
Création de la notice
17/10/2022 13:36
Dernière modification de la notice
14/02/2023 7:16