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A new Leptographium species associated with Tomicus piniperda infesting pine logs in Korea.

Kim JaeJin ; Lim YoungWoon ; Breuil, C. ; Wingfield, M. J. ; Zhou XuDong ; Kim GyuHyeok

Mycological Research 2005 Vol 109 No. 3 pp. 275-284;


During the course of a survey of sapstaining fungi in Korea, a Leptographium species was isolated from Pinus densiflora and P. koraiensis logs, infested with the bark beetle Tomicus piniperda. The fungus grew optimally at 25°C on 2% malt extract agar and showed a high level of tolerance to cycloheximide. The Leptographium has unusually short conidiophores and is morphologically similar to L. pini-densiflorae, L. lundbergii, L. yunnanense, and the Leptographium anamorph of Ophiostoma crassivaginatum [Ceratocystiopsis crassivaginata]. Comparisons of DNA sequence data for three gene regions, as well as morphological characteristics, confirmed that this fungus represents an undescribed taxon. We consequently provide the name for this Leptographium sp. as L. koreanum sp. nov.