Primarily, there are two types of mycorrhizae, ectomycorrhizae and endomycorrhizae. They both are very similar in function, the main difference being in how they carry it out.
Ectomycorrhizae “wraps” itself around the root tips of the plant, and that is where the symbiotic interchange happens.
Endomycorrhizae, on the other hand, penetrates the roots’ cells to facilitate the symbiotic nutrient exchange. About 85% of all terrestrial plant species in the world benefit from endomycorrhizae.