A New Species of Thelonectria and a New Record of Cephalotrichum hinnuleum from Gunwi and Ulleungdo in Korea

摘要

Three fungal strains belonging to the class Sordariomycetes were isolated from soils collected from Gyeongsangbuk-do in Korea. They were identified as Cephalotrichum hinnuleum (UD CT 1-3-3 and KNU-19GWF1) and Thelonectria chlamydospora sp. nov. (UD ST 1-2-1). T. chlamydospora sp. nov. was morphologically identical to T. truncata , but its specific macroconidial dimensions, lower number of septations, and chlamydospore diameter render it distinct from the strains of the genus Thelonectria . The strains UD CT 1-3-3 and KNU-19GWF1 were developed flat, velvety to felty, and golden gray to brown-gray after 14?days of incubation at 25?°C on PDA. These strains were produced polyblastic conidiogenous cells and conidia were pale brown to brown, smooth, thin-walled, subglobose to ellipsoidal, arranged in chains, and the diameters of 6.7–9.0?×?3.7–5.1?μm. The strains were also confirmed by using the multi-locus genes using internal transcribed spacer (ITS) regions, partial large subunit (LSU), translation elongation factor 1α ( TEF1-α ), β-tubulin ( TUB2 ), and actin ( ACT ) genes. This is the discovery of T. chlamydospora sp. nov. and Cephalotrichum hinnuleum , a new record from Korea.