What Are Specialized Symbiotic Associations Between The Roots Of Plants And Fungi Called?

The specialized relation between plant roots and fungi is called Mycorrhizae. It has two types:
Endomycorrhizae:
In endomycorrhizae fungal hyphae penetrate the livingcells of roots and form swellings and coils.
Ectomycorrhizae:
In ectomycorrhizae only surround the cells and do not penetrate into living cells. www.bio-medicine.org