Identification of the basidiomycetous fungus isolated from butt rot of the Japanese cypress |
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Authors: | H. Suhara N. Maekawa T. Kubayashi K. Sakai R. Kondo |
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Affiliation: | (1) Department of Forestry and Forest Products Sciences, Faculty of Agriculture, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan Tel. +81-92-642-2811; Fax +81-92-642-2811 e-mail: kondo@brs.kyushu-u.ac.jp, JP;(2) The Tottori Mycological Institute, Tottori, Japan, JP;(3) Nagasaki Prefecture Government, Goto Branch Bureau, Fukue, Japan, JP |
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Abstract: | To identify a basidiomycetous fungus isolated from butt rot of Chamaecyparis obtusa, Japanese cypress, its cultural features were examined, and sequences of its nuclear ribosomal 18S and ITS1–5.8S–ITS2 regions were analyzed. In culture, this fungus is characterized by the occurrence of chlamydospores, blastoconidium-like cells, and clavate-to-spathulate hyphal ends at the tips of aerial hyphae, and production of a small basidioma on the mycelial mat after 3 months of incubation. The morphological features of the basidioma are identical to those of Phlebia brevispora. Furthermore, molecular data of the sequences of these strains and P. brevispora showed a high level of similarity. These results appear to justify determining the present fungus as P. brevispora. This is the first report of this species for Japan and outside of southeastern USA. Received: March 11, 2002 / Accepted: September 20, 2002 Acknowledgments We thank Dr. Karen K. Nakasone, Center for Forest Mycology Research, Forest Products Laboratory, USDA Forest Service, for providing the fungal strains used in this study. Correspondence to:R. Kondo |
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Keywords: | Chamaecyparis obtusa Corticiaceae Cultural features Phlebia brevispora Ribosomal DNA sequence |
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