Abstract
Forty-two plant species growing in a Pinus densiflora forest in Higashi-Hiroshima, western Japan are surveyed for the presence of different types of mycorrhizal association. All of these plant species have one or two types of mycorrhiza. Arbuscular mycorrhiza is observed in most (93%) of the plant species examined including Equisetaceae and Cyperaceae. Two ectomycorrhizal plants, Pinus densiflora and Quercus serrata, also show arbuscular mycorrhizal infection. Ericoid mycorrhizas are observed in four ericaceous species. Orchid mycorrhiza is found in Cymbidium goeringii, which is the only orchid species in the study site. It is concluded that arbuscular mycorrhiza is the predominant mycorrhizal type even in forests dominated by the ectomycorrhizal tree P. densiflora.
