A rice Serine/Threonine receptor-like kinase regulates arbuscular mycorrhizal symbiosis at the peri-arbuscular membrane

Ronelle Roth, Marco Chiapello, Héctor Montero, Peter Gehrig, Jonas Grossmann, Kevin O’Holleran, Denise Hartken, Fergus Walters, Shu Yi Yang, Stefan Hillmer, Karin Schumacher, Sarah Bowden, Melanie Craze, Emma J. Wallington, Akio Miyao, Ruairidh Sawers, Enrico Martinoia, Uta Paszkowski

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Abstract

In terrestrial ecosystems most plant species live in mutualistic symbioses with nutrient-delivering arbuscular mycorrhizal (AM) fungi. Establishment of AM symbioses includes transient, intracellular formation of fungal feeding structures, the arbuscules. A plant-derived peri-arbuscular membrane (PAM) surrounds the arbuscules, mediating reciprocal nutrient exchange. Signaling at the PAM must be well coordinated to achieve this dynamic cellular intimacy. Here, we identify the PAM-specific Arbuscular Receptor-like Kinase 1 (ARK1) from maize and rice to condition sustained AM symbiosis. Mutation of rice ARK1 causes a significant reduction in vesicles, the fungal storage structures, and a concomitant reduction in overall root colonization by the AM fungus Rhizophagus irregularis. Arbuscules, although less frequent in the ark1 mutant, are morphologically normal. Co-cultivation with wild-type plants restores vesicle and spore formation, suggesting ARK1 function is required for the completion of the fungal life-cycle, thereby defining a functional stage, post arbuscule development.

Original languageEnglish (US)
Article number4677
JournalNature communications
Volume9
Issue number1
DOIs
StatePublished - Dec 1 2018

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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    Roth, R., Chiapello, M., Montero, H., Gehrig, P., Grossmann, J., O’Holleran, K., Hartken, D., Walters, F., Yang, S. Y., Hillmer, S., Schumacher, K., Bowden, S., Craze, M., Wallington, E. J., Miyao, A., Sawers, R., Martinoia, E., & Paszkowski, U. (2018). A rice Serine/Threonine receptor-like kinase regulates arbuscular mycorrhizal symbiosis at the peri-arbuscular membrane. Nature communications, 9(1), [4677]. https://doi.org/10.1038/s41467-018-06865-z