Pantoea ananatis-triggered systemic resistance requires root sensing through the LORE receptor kinase in Arabidopsis.

Pantoea ananatis BRT175 triggers LORE-dependent induced systemic resistance in Arabidopsis thaliana against Botrytis cinerea, but not against Pseudomonas syringae pv. tomato DC3000.

• Why it matters: Plants can mount systemic immunity after beneficial bacterial contact, yet how bacterial lipid signals are sensed and translated into systemic, pathogen-specific defense is unclear.
• What they did: The study tested whether the LORE receptor kinase, which senses HAA and mc-3-OH-FAs, is required for rhizobacteria-mediated ISR by using P. ananatis BRT175 and mimicking signals with HAAs or 3-hydroxy-decanoic acid (3-OH-C10).
• The result: LORE-mediated sensing of HAA/3-OH-C10 activates salicylic acid and jasmonic acid/ethylene pathways and defense gene expression in leaves, enabling ISR specifically against B. cinerea.