The Root Cap Cuticle: A Cell Wall Structure for Seedling Establishment and Lateral Root Formation.

Détails

ID Serval
serval:BIB_8D171D2D53B7
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The Root Cap Cuticle: A Cell Wall Structure for Seedling Establishment and Lateral Root Formation.
Périodique
Cell
Auteur(s)
Berhin A., de Bellis D., Franke R.B., Buono R.A., Nowack M.K., Nawrath C.
ISSN
1097-4172 (Electronic)
ISSN-L
0092-8674
Statut éditorial
Publié
Date de publication
07/03/2019
Peer-reviewed
Oui
Volume
176
Numéro
6
Pages
1367-1378.e8
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
The root cap surrounding the tip of plant roots is thought to protect the delicate stem cells in the root meristem. We discovered that the first layer of root cap cells is covered by an electron-opaque cell wall modification resembling a plant cuticle. Cuticles are polyester-based protective structures considered exclusive to aerial plant organs. Mutations in cutin biosynthesis genes affect the composition and ultrastructure of this cuticular structure, confirming its cutin-like characteristics. Strikingly, targeted degradation of the root cap cuticle causes a hypersensitivity to abiotic stresses during seedling establishment. Furthermore, lateral root primordia also display a cuticle that, when defective, causes delayed outgrowth and organ deformations, suggesting that it facilitates lateral root emergence. Our results show that the previously unrecognized root cap cuticle protects the root meristem during the critical phase of seedling establishment and promotes the efficient formation of lateral roots.
Mots-clé
Arabidopsis/genetics, Arabidopsis/growth & development, Arabidopsis Proteins/metabolism, Cell Wall/metabolism, Gene Expression Regulation, Plant/genetics, Membrane Lipids/biosynthesis, Membrane Lipids/metabolism, Meristem/metabolism, Mutation, Plant Root Cap/metabolism, Plant Root Cap/physiology, Plant Roots/cytology, Seedlings/genetics, Seedlings/growth & development, Arabidopsis, cell wall, diffusion barrier, lateral root, lateral root emergence, plant cuticle, primary root, root cap, root development, seedling
Pubmed
Web of science
Création de la notice
31/03/2019 14:17
Dernière modification de la notice
11/01/2020 6:16
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