What does the published scientific research say about Glomus clarum?

Glomus clarum — reclassified as Rhizophagus clarus and also listed as Rhizoglomus clarum — is an arbuscular mycorrhizal fungus (AMF) cited across 8 PubMed articles in plant-input contexts. A benchmark survey of 68 commercial AMF inoculants found R. clarus present but the least common species among benchmarked Glomeraceae, trailing Rhizophagus irregularis, Funneliformis mosseae, and Claroideoglomus etunicatum.

Peer-reviewed research reports that R. clarus inoculation in sorghum combined with 20 µM sorgoleone increased total biomass 1.6-fold under low-phosphorus conditions and upregulated mycorrhiza-induced phosphate-transport genes in fine roots. Separately, co-inoculation of Rhizophagus clarus with ACC-deaminase bacteria in maize is cited in the literature to increase mycorrhizal colonization by roughly 50% and reduce sodium and potassium accumulation in plant tissue under saline stress.

In copper-contaminated sandy soil, Rhizoglomus clarum is reported in peer-reviewed research to alleviate Cu toxicity in Canavalia ensiformis, yielding an 81% increase in shoot dry weight; combined inoculation with earthworms raised aerial Cu accumulation by 200%. Strain-level studies show significant intraspecific genetic variability in R. clarus that correlates with measurable differences in host plant growth response, and published work has demonstrated asymbiotic spore production of Rhizophagus clarus using strigolactone and jasmonate.