No abstract

Several nutritive media were tested to select the optimal medium for the mycelial growth of Boletus edulis Bull.: Fr., Lactarius deliciosus Fr., y Suillus luteus (L.: Fr.) Gray. The results show that it is not possible to determine the optimal nutritive medium for each species, because of the existence of a significant interaction between the strain factor and the nutritive medium. Ectomycorrhizae of Lactarius deliciosus Fr. y Pinus sylvestris L. are described.