Mycorrhiza

A mycorrhiza (Gk. μυκός, mykós, "fungus" and ριζα, riza, "roots", pl. mycorrhizae or mycorrhizas) is a symbiotic (generally mutualistic, but occasionally weakly pathogenic) association between a fungus and the roots of a vascular plant.

In a mycorrhizal association, the fungus colonizes the host plant's roots, either intracellularly as in arbuscular mycorrhizal fungi (AMF or AM), or extracellularly as in ectomycorrhizal fungi. They are an important component of soil life and soil chemistry.

Read more about Mycorrhiza:  Mutualist Dynamics, Occurrence of Mycorrhizal Associations, Types of Mycorrhiza, Discovery