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<p>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 <i>LYR-IA</i> 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 <i>LYR-IB</i> group, and found that they show high affinity for LCO, short- and long-chain CO, and play a complementary role with the <i>LYR-IA</i> receptors for AM establishment. While <i>LYR-IB</i> knock out mutants had a reduced AMF colonization in several species, constitutive/ectopic expression in wheat increased AMF colonization. <i>LYR-IB</i> 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 <i>LYR-IA</i> 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.</p>

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

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月1日

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  • 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,
  • Benoit Lefebvre

摘要

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.