Mitochondrial ROS trigger interorganellular signaling and prime ER processes to establish enhanced plant immunity.

ABSTRACT: Reactive oxygen species (ROS) are key signaling molecules in plant development and immunity, but current understanding is primarily focused on apoplastic and chloroplastic ROS. Mitochondria are also a key source of intracellular ROS, yet their contribution to plant immunity is poorly characterized. Here, we studied mitochondrial ROS (mROS) function in plant-pathogen interactions, deploying genetically encoded sensors, assorted fluorescent markers, and genetic approaches to track mROS, specifically H₂O₂, dynamics and identify interorganelle contact sites. We unexpectedly found a mitochondria-endoplasmic reticulum (ER) ROS signal cascade functioning independently of apoplastic and chloroplastic ROS in plant immunity. mROS initiate immune responses induced by the oomycet

SUBMITTER: Yang Y 

PROVIDER: S-EPMC12487925 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature