What does the published scientific research say about Oidiodendron maius?

Studies report that O. maius strain Om19 produces indole-3-acetic acid (IAA) through a tryptophan-dependent pathway, and that inoculation with Om19 accelerates adventitious root formation in Rhododendron fortunei microcuttings. Nitrogen and phosphorus uptake genes were upregulated in inoculated plants, and measurable fresh- and dry-weight gains are cited in the literature. For highbush blueberry (Vaccinium corymbosum), peer-reviewed research identifies O. maius as one of the most growth-promoting ErM fungi in single-inoculation trials, with benefits documented at semi-industrial scale.

A greenhouse study across nine ericaceous species found that the mycorrhizal growth response to O. maius varied with plant and fungal identity — effects cited in the literature are not uniform across all crops. Research also notes that pairing O. maius with specific mycorrhizal helper bacteria can further enhance blueberry seedling development beyond what the fungus achieves alone.