Cell-type-specific immune programs orchestrate spatial defense in the Arabidopsis leaf epidermis - PubMed
4 hours ago
- #plant immunity
- #Arabidopsis
- #cell-type-specific defense
- Guard cells (GCs) and pavement cells in Arabidopsis thaliana exhibit distinct immune responses to pathogens.
- Pavement cells activate salicylic acid (SA) biosynthesis and transport during powdery mildew infection, spreading signals to neighboring cells.
- Guard cells fail to activate SA biosynthesis or SA-responsive genes but show rapid calcium influx and reactive oxygen species bursts.
- GCs transmit immune signals to adjacent pavement cells via the apoplast and undergo hypersensitive cell death when infected by adapted fungal pathogens.
- Cell-type-specific immune programs are conserved across infections by diverse pathogens, including Colletotrichum higginsianum and Pseudomonas syringae.