Longitudinal zone- and cell type-specific pattern-triggered immune responses in Arabidopsis roots.

Plant-derived phytocytokines trigger stronger immune responses than microbial patterns across Arabidopsis root cell types and zones, with response strength linked to pathogen invasion sites.

• Why it matters: Understanding how roots detect and respond to microbial threats is crucial for improving plant resilience, yet the cell type- and zone-specific immune mechanisms remain poorly characterized.
• What they did: Using single-cell transcriptomics and live-cell imaging, the study analyzed Arabidopsis roots, revealing differential receptor expression and signaling modules that shape immune response intensity in specific zones and cell types.
• The result: Findings show phytocytokines modulate growth-defense trade-offs and identify key transcriptional regulators, providing a detailed map of root immune responses that can inform crop protection strategies.