Rhizophagus irregularis, the model fungus in arbuscular mycorrhiza research, is dimorphic
Rhizophagus irregularis is the model species for AMF research and is industrially cultivated for the commercialization of plant biostimulants. Using asymbiotic and symbiotic culture systems inoculated with a single spore, advanced microscopy, Sanger sequencing of the glomalin protein gene and PacBio sequencing of the partial 45S rRNA gene, we demonstrate that R. irregularis produces two distinct spore morphologies