Abstract
During an investigation of the fungal diversity of Korean soils, four Penicillium strains could not be assigned to any described species. The strains formed monoverticillate conidiophores with occasionally a divaricate branch. The conidia were smooth or finely rough-walled, globose to broadly ellipsoidal and 2.5-3.5 × 2.0-3.0 μm in size. Their taxonomic novelty was determined using partial β-tubulin gene sequences and the ribosomal internal transcribed spacer region. The phylogenetic analysis showed that the isolates belonged to section Lanata- Divaricata and were most closely related to Penicillium raperi. Phenotypically, the strains differed from P. raperi in having longer and thicker stipes and thicker phialides. Strain KACC 47721(T) from bamboo field soil was designated as the type strain of the new species, and the species was named Penicillium koreense sp. nov., as it was isolated from various regions in Korea.
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