The calcium-permeable channel OSCA1.3 regulates plant stomatal immunity.

ABSTRACT: Perception of biotic and abiotic stresses often leads to stomatal closure in plants^1,2. Rapid influx of calcium ions (Ca²⁺) across the plasma membrane has an important role in this response, but the identity of the Ca²⁺ channels involved has remained elusive^3,4. Here we report that the Arabidopsis thaliana Ca²⁺-permeable channel OSCA1.3 controls stomatal closure during immune signalling. OSCA1.3 is rapidly phosphorylated upon perception of pathogen-associated molecular patterns (PAMPs). Biochemical and quantitative phosphoproteomics analyses reveal that the immune receptor-associated cytosolic kinase BIK1 interacts with and phosphorylates the N-terminal cytosolic loop of OSCA1.3 within minutes of treatment with the peptidic PAMP flg22,

SUBMITTER: Thor K 

PROVIDER: S-EPMC8435934 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature