What benefits of Glomus clarum have been cited in the scientific literature?
Peer-reviewed research reports that Glomus clarum increases phosphorus uptake and total plant biomass in sorghum under low-phosphorus conditions, with one study recording a 1.6-fold biomass increase over non-inoculated controls at 20 µM sorgoleone. Mycorrhizal colonization itself was enhanced in the presence of that root exudate. For maize, the literature cites improved growth and photosynthetic protection under saline stress when Glomus clarum is co-inoculated with ACC deaminase-producing plant growth-promoting bacteria.
Research also documents a phytoremediation-adjacent benefit: in copper-contaminated soil, Glomus clarum is reported to increase Canavalia ensiformis shoot dry weight by 81%, rising to a 200% increase in shoot copper accumulation when combined with earthworms. Separately, studies note that host plant growth responses vary significantly with intraspecific genetic differences among Glomus clarum strains — a meaningful consideration for product developers selecting isolates.
1AAPFCO-accepted claims
Listing details- Beneficial to plants and/or soils.
Accepted wording, shown verbatim · source: AAPFCO Plant Biostimulant list
2Potential claims from the literature
Reported to promote maize growth and increase plant biomass under saline stress when co-inoculated with ACC deaminase-producing plant growth-promoting bacteria, through osmoregulation and protection of the photosynthetic apparatus
Reported to enhance mycorrhizal colonization in sorghum in the presence of sorgoleone, with significant increases in phosphorus content and biomass observed at 20 µM sorgoleone
Reported to increase phosphorus uptake and plant biomass in sorghum when inoculated with 20 µM sorgoleone under low-phosphorus conditions, with a 1.6-fold increase in total sorghum biomass compared to non-inoculated treatment
Reported to cause significant differences in host plant growth depending on intraspecific genetic variability among strains
Reported to alleviate copper toxicity in Canavalia ensiformis, increasing shoot dry weight by 81% in copper-contaminated soil, and when combined with earthworms, yielding a 200% increase in copper accumulation in shoots
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