A phenol-enriched cuticle is ancestral to lignin evolution in land plants.
Fiche publication
Date publication
mars 2017
Journal
Nature communications
Auteurs
Membres identifiés du Cancéropôle Est :
Mme HERRGOTT Laurence, Dr ERHARDT Mathieu
Tous les auteurs :
Renault H, Alber A, Horst NA, Basilio Lopes A, Fich EA, Kriegshauser L, Wiedemann G, Ullmann P, Herrgott L, Erhardt M, Pineau E, Ehlting J, Schmitt M, Rose JK, Reski R, Werck-Reichhart D
Lien Pubmed
Résumé
Lignin, one of the most abundant biopolymers on Earth, derives from the plant phenolic metabolism. It appeared upon terrestrialization and is thought critical for plant colonization of land. Early diverging land plants do not form lignin, but already have elements of its biosynthetic machinery. Here we delete in a moss the P450 oxygenase that defines the entry point in angiosperm lignin metabolism, and find that its pre-lignin pathway is essential for development. This pathway does not involve biochemical regulation via shikimate coupling, but instead is coupled with ascorbate catabolism, and controls the synthesis of the moss cuticle, which prevents desiccation and organ fusion. These cuticles share common features with lignin, cutin and suberin, and may represent the extant representative of a common ancestor. Our results demonstrate a critical role for the ancestral phenolic metabolism in moss erect growth and cuticle permeability, consistent with importance in plant adaptation to terrestrial conditions.
Mots clés
Ascorbic Acid, metabolism, Biological Evolution, Bryopsida, genetics, Cytochrome P-450 Enzyme System, genetics, Desiccation, Embryophyta, Gene Knockout Techniques, Lignin, metabolism, Magnoliopsida, metabolism, Membrane Lipids, Phenols, metabolism, Plant Components, Aerial, metabolism, Plants, Genetically Modified
Référence
Nat Commun. 2017 Mar 8;8:14713