I became interested in how plants were affected by different mycorrhizal fungi. I found a paper written by John N. Klironomos, where he tested the mycorrhizal fungi's affect on plant growth. He used different mycorrhizal fungi sourced from different locations with their own unique affects on plants and placed them into the roots of one species of plant from one location to observe the different affects of each type of mycorrhizal fungi. His findings were quite interesting. If you are interested to read his paper, a link is provided below.
Link for Paper: