Record ID No. |
5546 |
Author(s) |
Roth R.*, Chiapello M., Montero H., Gehrig P., Grossmann J., O , 2018 |
Affiliation |
*Department of Plant Sciences, University of Cambridge, Cambridge, CB2 3EA, UK |
Title |
A rice Serine/Threonine receptor-like kinase regulates arbuscular mycorrhizal symbiosis at the peri-arbuscular membrane |
Source. Vol.(no):Page |
Nature communications. 9(4677) |
Categories |
|
Subjects |
Ultrastructure |
Host |
Maize and Rice |
Organism |
Rhizopagus irregularis |
Country |
United Kingdom. |
Abstracts |
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, the PAM-specific Arbuscular Receptor-like Kinase 1 (ARK1) from maize and rice to condition sustained AM symbiosis was identified. 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. |