Symbiotic fungi are involved in the formation of

Some fungi particularly belonging to ascomycetes and basidiomycetes are involved in the formation of lichens by associating symbiotically with algae and cyanobacteria. Some phycomycetes are involved in the formation of mycorrhizae.Rhizomorphs are root like structures formed by the entangled hyphae of club fungi. Root nodules and coralloid roots of Cycas do not have fungi.