Characterization and classification of mycorrhizae of Douglas fir. I.Pseudotsuga menziesii+Poria terrestris(blue- and orange-staining strains)

摘要

Two newly discovered ectotrophic mycorrhizae of Douglas fir (Pseudotsuga menziesii(Mirb.) Franco), each formed by a distinct strain ofPoria terrestris(DC. ex Fries) Sacc., are described. Each is named according to tree and fungus species, including strain of the latter as denoted by characteristic staining of respective sporocarps:Pseudotsuga menziesii+Poria terrestris(blue-staining) andP. menziesii+P. terrestris(orange-staining). Macro- and micro-scopic descriptions of the natural mycorrhizae, of surrounding mycelia and rhizomorphs, and of nutrient agar cultures of each fungal strain ofP. terrestrisare given. The two described strains ofPoria terrestrisare proposed for at least varietal distinction on the basis of their mycorrhizal and cultural differences.