Arbuscular Mycorrhizae. Arbuscular mycorrhizae belong to the phylum Glomeromycota and are the most widespread of the mycorrhizae species (3) Since arbuscular mycorrhizae are the most common, they are also the most well-known and studied.This type of fungi also has a very high affinity for phosphorus (3).ue to the fact that this is a symbiotic relationship, both the fungus and the plant benefit from this interaction. Since the plants are aboveground, it is often easier to see the benefits of this association for the plant, but the fungus also takes advantage of this partnership.