The receptor kinase SRF3 coordinates iron-level and flagellin dependent defense and growth responses in plants

Matthieu Pierre Platre, Santosh B. Satbhai, Lukas Brent, Matias F. Gleason, Min Cao, Magali Grison, Marie Glavier, Ling Zhang, Christophe Gaillochet, Christian Goeschl, Marco Giovannetti, Balaji Enugutti, Julie Neveu, Marcel Reth, Ruben Alcázar, Jane E. Parker, Grégory Vert, Emmanuelle Bayer and Wolfgang Busch ()
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Matthieu Pierre Platre: Plant Molecular and Cellular Biology Laboratory
Santosh B. Satbhai: Plant Molecular and Cellular Biology Laboratory
Lukas Brent: Plant Molecular and Cellular Biology Laboratory
Matias F. Gleason: Plant Molecular and Cellular Biology Laboratory
Min Cao: Plant Molecular and Cellular Biology Laboratory
Magali Grison: University of Bordeaux, CNRS, Laboratoire de Biogenèse Membranaire, UMR 5200 CNRS
Marie Glavier: University of Bordeaux, CNRS, Laboratoire de Biogenèse Membranaire, UMR 5200 CNRS
Ling Zhang: Plant Molecular and Cellular Biology Laboratory
Christophe Gaillochet: Plant Molecular and Cellular Biology Laboratory
Christian Goeschl: Austrian Academy of Sciences, Vienna Biocenter (VBC)
Marco Giovannetti: Austrian Academy of Sciences, Vienna Biocenter (VBC)
Balaji Enugutti: Austrian Academy of Sciences, Vienna Biocenter (VBC)
Julie Neveu: UMR5546 CNRS/Université Toulouse 3
Marcel Reth: Max Planck Institute for Plant Breeding Research
Ruben Alcázar: Max Planck Institute for Plant Breeding Research
Jane E. Parker: Max Planck Institute for Plant Breeding Research
Grégory Vert: UMR5546 CNRS/Université Toulouse 3
Emmanuelle Bayer: University of Bordeaux, CNRS, Laboratoire de Biogenèse Membranaire, UMR 5200 CNRS
Wolfgang Busch: Plant Molecular and Cellular Biology Laboratory

Nature Communications, 2022, vol. 13, issue 1, 1-18

Abstract: Abstract Iron is critical for host–pathogen interactions. While pathogens seek to scavenge iron to spread, the host aims at decreasing iron availability to reduce pathogen virulence. Thus, iron sensing and homeostasis are of particular importance to prevent host infection and part of nutritional immunity. While the link between iron homeostasis and immunity pathways is well established in plants, how iron levels are sensed and integrated with immune response pathways remains unknown. Here we report a receptor kinase SRF3, with a role in coordinating root growth, iron homeostasis and immunity pathways via regulation of callose synthases. These processes are modulated by iron levels and rely on SRF3 extracellular and kinase domains which tune its accumulation and partitioning at the cell surface. Mimicking bacterial elicitation with the flagellin peptide flg22 phenocopies SRF3 regulation upon low iron levels and subsequent SRF3-dependent responses. We propose that SRF3 is part of nutritional immunity responses involved in sensing external iron levels.

Date: 2022
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DOI: 10.1038/s41467-022-32167-6

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