(pl. ectomycorrhizae) symbiotic association between a nonpathogenic or weakly pathogenic fungus and the roots of plants with fungal hyphae between and external to root cells (see arbuscular mycorrhiza)
(Gr. ecto, outside) Mycorrhizas with hyphae that do not penetrate cells.
or ectotrophic mycorrhizae. A symbiotic condition between a fungus and the root of a plant in which the fungus forms a sheath around the root. Some hyphae connecting to this sheath penetrate the host root and spread through the soil surrounding the roots. Ectomycorrhizae form between tree species and basidiomyctete fungi.
A less common and specialized association of fungi and plants. These associations are found on many deciduous north temperate trees and often these trees will not grow properly unless the appropriate fungus is present. The hypae of the fungus penetrate the roots of plants and surround the cortex cells in an intercellular meshwork termed the Hartig net. Mycorrhizal roots aid the tree in the uptake of nutrients such as phosphate and water while the fungus gets carbohydrates and vitamins from the tree.
type of mycorrhiza in which fungal hyphae grow around the root and between cells of the epidermis. More information
An association of a fungus and the root of a plant (usually a tree) in which the fungus forms a sheath around the root and penetrates between the cells of the host.
