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RNA-seq and Ribo-seq analysis of Arabidopsis thaliana immune response

ABSTRACT: In land plants, guard cells sense pathogens and close stomata to resist their entry. Pathogen-infected local leaves transmit the danger status to uninfected distal systemic leaves and trigger their stomatal closure as a global defense termed systemic stomatal immunity. However, the corresponding mobile signals remain unknown. Here, we report that an upstream open reading frame (uORF) encodes a long-distance mobile peptide inducing systemic stomatal closure and named uORF-encoded systemic stomatal immune conductor (USIC). In local leaves, USIC expression is upregulated upon pathogen/pattern signals. In systemic leaves, the SIRK1 receptor and KIN7 coreceptor perceives USIC, and induces KIN7 cleavage by MC4. KIN7 translocates to tonoplasts and mediates stomatal closure by associating with H+-ATPases and aquaporins. This study reveals a systemic signaling mechanism whereby an uORF-encoded mobile peptide and its receptor pathway activating systemic stomatal immunity.

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE300232 | GEO | 2026/05/01

REPOSITORIES: GEO

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