ROS production by localized SCHENGEN receptor module drives lignification at subcellular precision
Damien De Bellis,
Kai H. Edel,
Tonni Grube Andersen,
Valérie Dénervaud Tendon,
Verónica G. Doblas,
Posted 25 Oct 2019
bioRxiv DOI: 10.1101/818997 (published DOI: 10.15252/embj.2019103894)
Posted 25 Oct 2019
Production of reactive-oxygen species (ROS) by NADPH oxidases (NOXs) impacts many processes in animals and plants and many plant receptor pathways involve rapid, NOX-dependent increases of ROS. Yet, their general reactivity has made it challenging to pinpoint the precise role and direct cellular targets of ROS. A well-understood ROS target in plants are lignin peroxidases in the cell wall. Lignin can be deposited with exquisite spatial control, but the underlying mechanisms have remained elusive. Here we establish a full kinase signaling relay that exerts direct, spatial control over ROS production and lignification within the cell wall. We show that polar localization of a single kinase component is crucial for pathway function. Our data indicates that an intersection of more broadly localized components allows for micrometer-scale precision of lignification and that this system is triggered through initiation of ROS production as a critical peroxidase co-substrate.
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