Loss of Arabidopsis ferroxidases LPR1 and LPR2 enhances plant immunity by promoting leaf iron deposition.

Loss of Arabidopsis ferroxidases LPR1 and LPR2 increases plant immunity by promoting leaf iron deposition, with resistance enhanced by 2-fold in mutants.

• Why it matters: Understanding how iron homeostasis influences plant immunity addresses a key gap in plant-pathogen interaction research and could inform strategies to improve disease resistance.
• What they did: Researchers used Arabidopsis thaliana mutants lacking LPR1 and LPR2, observing their resistance to bacterial strains and analyzing iron deposition, ROS burst, gene expression, and defense responses.
• The result: The mutants showed increased leaf iron accumulation, stronger ROS and hypersensitive responses, elevated defense gene expression, and improved resistance, suggesting iron modulation as a potential disease control strategy.