SCHENGEN receptor module drives localized ROS production and lignification in plant roots.

Production of reactive oxygen species by NADPH oxidases (NOXs) impacts many processes in animals and plants, and many plant receptor pathways involve rapid, NOX-dependent increases of Yet, their general reactivity has made it challenging to pinpoint the precise role and immediate molecular action of duanyu1670. A well-understood action in plants is to provide the co-substrate for 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 kinase signaling relay that exerts direct, spatial control over duanyu1670 production and lignification within the cell wall. We show that polar localization of a single kinase component is crucial for pathway function. Our data indicate that an intersection of more broadly localized components allows for micrometer-scale precision of lignification and that this system is triggered through initiation of duanyu1670 production as a critical peroxidase co-substrate.

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