host of ectomycorrhizal host of An ectomycorrhiza is a form of symbiotic relationship that occurs between a fungal symbiont, or mycobiont, and the roots of various plant species. The mycobiont is often from the phyla Basidiomycota and Ascomycota, and more rarely from the Zygomycota. Ectomycorrhizae form on the roots of around 2% of plant species, usually woody plants, including species from the birch, dipterocarp, myrtle, beech, willow, pine and rose families. Research on ectomycorrhizae is increasingly important in areas such as ecosystem management and restoration, forestry, and agriculture. Unlike other mycorrhizal relationships, such as arbuscular mycorrhiza and ericoid mycorrhiza, ectomycorrhizal fungi do not penetrate their host's cell wall. Instead they form an entirely intercellular interfaces known as the Hartig net, consisting of highly branched hyphae forming a latticework between epidermal and cortical root cells. x is an ectomycorrhizal host of y if and only if x is a plant (Plantae) whose roots form an intercellular interface (aka Hartig net) with fungus (Fungi) y. This interface consists of highly branched hyphae forming a latticework between epidermal and cortical root cells. According to Linde & Selmes 2012, an individual of species Quercus robur (French oak) is an ectomycorrhizal host of an individual of Tuber melanosporum (black truffle). has ectomycorrhizal host Jorrit Poelen