Afficher la couverture 'The Arabidopsis homolog of human G3BP1 is a key regulator of stomatal and apoplastic immunity | Abulfaraj, Aala' en grand format
/5

0 avis

The Arabidopsis homolog of human G3BP1 is a key regulator of stomatal and apoplastic immunity

Archive ouverte

Abulfaraj, Aala | Mariappan, Kiruthiga | Bigeard, Jean | Manickam, Prabhu | Blilou, Ikram | Guo, Xiujie | Al-Babili, Salim | Pflieger, Delphine | Hirt, Heribert | Rayapuram, Naganand

Edité par CCSD ; Life Science Alliance LLC -

International audience. Mammalian Ras-GTPase-activating protein SH3-domain-binding proteins (G3BPs) are a highly conserved family of RNA-binding proteins that link kinase receptor-mediated signaling to RNA metabolism. Mammalian G3BP1 is a multifunctional protein that functions in viral immunity. Here, we show that the Arabidopsis thaliana homolog of human G3BP1 negatively regulates plant immunity. Arabidopsis g3bp1 mutants showed enhanced resistance to the virulent bacterial pathogen Pseudomonas syringae pv. tomato. Pathogen resistance was mediated in Atg3bp1 mutants by altered stomatal and apoplastic immunity. Atg3bp1 mutants restricted pathogen entry into stomates showing insensitivity to bacterial coronatine-mediated stomatal reopening. AtG3BP1 was identified as a negative regulator of defense responses, which correlated with moderate up-regulation of salicylic acid biosynthesis and signaling without growth penalty.

Suggestions

Du même auteur

The Trihelix transcription factor GT2-like 1 (GTL1) promotes salicylic acid metabolism, and regulates bacterial-triggered immunity

Archive ouverte | Völz, Ronny | CCSD

International audience. The Trihelix Transcription factor GT2-like 1 (GTL1) was previously shown to be a key regulator of ploidy-dependent trichome growth and drought tolerance. Here, we report that GTL1 plays an im...

Analysis of the Arabidopsis coilin mutant reveals a positive role of AtCOILIN in plant immunity

Archive ouverte | Abulfaraj, Aala, A | CCSD

International audience. Biogenesis of ribonucleoproteins occurs in dynamic subnuclear compartments called Cajal bodies (CBs). COILIN is a critical scaffolding component essential for CB formation, composition, and a...

The Lys‐motif receptor LYK4 mediates Enterobacter sp. SA187 triggered salt tolerance in Arabidopsis thaliana

Archive ouverte | Rolli, Eleonora | CCSD

International audience. Summary Root endophytes establish beneficial interactions with plants, improving holobiont resilience and fitness, but how plant immunity accommodates beneficial microbes is poorly understood...

Chargement des enrichissements...