Several groups of LysM-RLKs are involved in symbiotic signal perception and arbuscular mycorrhiza establishment

Yi Ding, Zélie Lesterps, Virginie Gasciolli, Anne-Laure Fuchs, Mégane Gaston, Lauréna Medioni, Annélie de-Regibus, Céline Remblière, Céline Vicédo, Sandra Bensmihen, Jean Jacques Bono, Julie Cullimore, Guilhem Reyt, Marion Dalmais, Christine Saffray, Solène Mazeau, Abdelhafid Bendahmane, Richard Sibout, Michiel Vandenbussche, Jacques Rouster, Tongming Wang, Guanghua He, Arnaud Masselin, Sylvain Cottaz, Sébastien Fort and Benoit Lefebvre ()
Additional contact information
Yi Ding: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Zélie Lesterps: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Virginie Gasciolli: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Anne-Laure Fuchs: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Mégane Gaston: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Lauréna Medioni: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Annélie de-Regibus: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Céline Remblière: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Céline Vicédo: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Sandra Bensmihen: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Jean Jacques Bono: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Julie Cullimore: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Guilhem Reyt: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Marion Dalmais: Université Paris-Saclay, CNRS, INRAE, Univ Evry, Institute of Plant Sciences Paris-Saclay (IPS2)
Christine Saffray: Université Paris-Saclay, CNRS, INRAE, Univ Evry, Institute of Plant Sciences Paris-Saclay (IPS2)
Solène Mazeau: Université Paris-Saclay, CNRS, INRAE, Univ Evry, Institute of Plant Sciences Paris-Saclay (IPS2)
Abdelhafid Bendahmane: Université Paris-Saclay, CNRS, INRAE, Univ Evry, Institute of Plant Sciences Paris-Saclay (IPS2)
Richard Sibout: INRAE, UR1268 BIA
Michiel Vandenbussche: Univ Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRAE
Jacques Rouster: Centre de Recherche de Chappes
Tongming Wang: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS
Guanghua He: Southwest University
Arnaud Masselin: Univ. Grenoble Alpes, CNRS, CERMAV
Sylvain Cottaz: Univ. Grenoble Alpes, CNRS, CERMAV
Sébastien Fort: Univ. Grenoble Alpes, CNRS, CERMAV
Benoit Lefebvre: Laboratory of Plant-Microbe-Environment Interactions (LIPME), Université de Toulouse, INRAE, CNRS

Nature Communications, 2025, vol. 16, issue 1, 1-14

Abstract: Abstract Lipo-chitooligosaccharides (LCO) and short-chain chitooligosaccharides (CO) are produced by arbuscular mycorrhizal fungi (AMF) and activate the plant symbiosis signalling pathway, which is essential for mycorrhiza formation. High-affinity LCO receptors belonging to the LysM receptor-like kinase (LysM-RLK) phylogenetic group LYR-IA play a role in AM establishment, but it is unclear which proteins are the plant high-affinity short-chain CO receptors. Here we studied members of the uncharacterized LYR-IB group, and found that they show high affinity for LCO, short- and long-chain CO, and play a complementary role with the LYR-IA receptors for AM establishment. While LYR-IB knock out mutants had a reduced AMF colonization in several species, constitutive/ectopic expression in wheat increased AMF colonization. LYR-IB function is conserved in all tested angiosperms, but in most japonica rice a deletion creates a frameshift in the gene, explaining differences in AM phenotypes between rice and other monocot single LYR-IA mutants. In conclusion, we identified a class of LysM-RLK receptors in angiosperms with unique biochemical properties and a role in both LCO and CO perception for AM establishment.

Date: 2025
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DOI: 10.1038/s41467-025-60717-1

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