期刊
EMBO JOURNAL
卷 39, 期 9, 页码 -出版社
WILEY
DOI: 10.15252/embj.2019103894
关键词
extracellular diffusion barriers; Casparian strips; lignin; localized ROS production; polarized signaling
资金
- ERC Consolidator Grant [616228-ENDOFUN]
- SNSF [CRSII3_136278, 31003A_156261]
- Federation of European Biochemical Sciences Postdoctoral Long-Term Fellowship
- JSPS
- Fundacion Alfonso Martin Escudero
- DFG [Ku931/14-1]
- EMBO Long-term Postdoctoral Fellowship
- Marie Curie Postdoctoral Fellowship
- Swiss National Science Foundation (SNF) [31003A_156261, CRSII3_136278] Funding Source: Swiss National Science Foundation (SNF)
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 immediate molecular action of ROS. A well-understood ROS 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 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 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 ROS production as a critical peroxidase co-substrate.
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