Titre :

A novel plant leucine-rich repeat receptor kinase regulates the response of Medicago truncatula roots to salt stress.

Auteur(s) :

de Lorenzo, Laura [Auteur]
Merchan, Francisco [Auteur]
Institut des sciences du végétal [ISV]
Laporte, Philippe [Auteur]
Laboratoire d'Informatique Fondamentale de Lille [LIFL]
Nouveaux Outils pour La Coopération et l'Education [NOCE]
Thompson, Richard [Auteur]
Génétique et Ecophysiologie des Légumineuses à Graines (UMRLEG) [UMR 102]
Clarke, Jonathan [Auteur]
Sousa, Carolina [Auteur]
Crespi, Martín [Auteur]
Institut des sciences du végétal [ISV]

Titre de la revue :

The Plant cell

Pagination :

668-80

Éditeur :

American Society of Plant Biologists (ASPB)

Date de publication :

2009-02

ISSN :

1040-4651

Mot(s)-clé(s) :

RELATION PLANTE-SOL
ECOPHYSIOLOGIE
CELLULE VEGETALE DE SURFACE

Mot(s)-clé(s) en anglais :

SALINITY TOLERANCE
PROTEIN KINASE
GENE EXPRESSION
ARABIDOPSIS THALIANA
MEDICAGO TRUNCATULA

Discipline(s) HAL :

Sciences du Vivant [q-bio]/Biologie végétale

Résumé en anglais : [en]

In plants, a diverse group of cell surface receptor-like protein kinases (RLKs) plays a fundamental role in sensing external signals to regulate gene expression. Roots explore the soil environment to optimize their growth ...
Lire la suite >In plants, a diverse group of cell surface receptor-like protein kinases (RLKs) plays a fundamental role in sensing external signals to regulate gene expression. Roots explore the soil environment to optimize their growth via complex signaling cascades, mainly analyzed in Arabidopsis thaliana. However, legume roots have significant physiological differences, notably their capacity to establish symbiotic interactions. These major agricultural crops are affected by environmental stresses such as salinity. Here, we report the identification of a leucine-rich repeat RLK gene, Srlk, from the legume Medicago truncatula. Srlk is rapidly induced by salt stress in roots, and RNA interference (RNAi) assays specifically targeting Srlk yielded transgenic roots whose growth was less inhibited by the presence of salt in the medium. Promoter-beta-glucuronidase fusions indicate that this gene is expressed in epidermal root tissues in response to salt stress. Two Srlk-TILLING mutants also failed to limit root growth in response to salt stress and accumulated fewer sodium ions than controls. Furthermore, early salt-regulated genes are downregulated in Srlk-RNAi roots and in the TILLING mutant lines when submitted to salt stress. We propose a role for Srlk in the regulation of the adaptation of M. truncatula roots to salt stress.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

• Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL) - UMR 9189

Source :

Harvested from HAL