The Ericoid variety of these structures is found in acidic conditions, and is often associated with the telomorph-forming families Leotiaceae and Myxotrichaceae.  
The Ericoid variety of these structures is found in acidic conditions, and is often associated with the telomorph-forming families Leotiaceae and Myxotrichaceae.  The Arbuscular variety is formed by organisms such as the Glomales, which cannot grow independently.  First described by A.B. Frank in 1885, they often work by producing proteases that release nitrogen and phosphorus from the surrounding soil.   FTP, name this symbiotic relationship in which the hyphae of a fungus exchange nutrients with a plant root.
The Ericoid variety of these structures is found in acidic conditions, and is often associated with the telomorph-forming families Leotiaceae and Myxotrichaceae.  
mycorrhizae