Thi Thuong Thuong Nguyen

Characterization of Two New Records of Zygomycete Species Belonging to Undiscovered Taxa in Korea.

Abstract During a biodiversity survey of undiscovered taxa in Korea, two zygomycetous fungal strains were isolated. The first strain, EML-FSDY6-1 was isolated from a soil sample collected at Dokdo Island in the East Sea of Korea in 2013, and the second strain, EML-DG-NH3-1 was isolated from a rat dung sample collected at Chonnam National University garden, Gwangju, Korea in 2014. Based on the morphological characteristics and phylogenetic analysis of the internal transcribed spacer, 18S and 28S rDNA, actin and translation elongation factor-1α genes. EML-FSDY6-1 and EML-DG-NH3-1 isolates were confirmed as zygomycete species, Absidia pseudocylindrospora and Absidia glauca, respectively. Neither species has previously been described in Korea.

Phylogenetic Status of an Unrecorded Species of Curvularia, C. spicifera, Based on Current Classification System of Curvularia and Bipolaris Group Using Multi Loci

Abstract A seed-borne fungus, Curvularia sp. EML-KWD01, was isolated from an indigenous wheat seed by standard blotter method. This fungus was characterized based on the morphological characteristics and molecular phylogenetic analysis. Phylogenetic status of the fungus was determined using sequences of three loci: rDNA internal transcribed spacer, large ribosomal subunit, and glyceraldehyde 3-phosphate dehydrogenase gene. Multi loci sequencing analysis revealed that this fungus was Curvularia spicifera within Curvularia group 2 of family Pleosporaceae.

Characterization of Two New Records of Mucoralean Species Isolated from Gut of Soldier Fly Larva in Korea

Abstract While surveying the diversity of fungi of the order Mucorales, two isolates, EML-PUKI12-1 and EML-PUKI06-1, were obtained from the gut of soldier fly larvae inhabiting the bulrush at a pond located in the Chonnam National University Arboretum, Gwangju, Korea. The isolates were confirmed as Mucor irregularis and Mucor fragilis species, respectively, based on the morphological characteristics and phylogenetic analysis of rDNA internal transcribed spacer region. Such mucoralean species belonging to undiscovered taxa has not previously been described in Korea.

Confirmation of Two Undescribed Fungal Species from Dokdo of Korea Based on Current Classification System Using Multi Loci

Abstract Using dilution plating method, 47 fungal isolates were obtained from a soil sample collected from Dokdo in the East Sea of Korea in 2013. In this study, two fungal isolates, EML-MFS30-1 and EML-DDSF4, were confirmed as undescribed species, Metarhizium guizhouense and Mortierella oligospora in Korea based on current classification system using multi loci including rDNA internal transcribed spacer, large subunit, small subunit, and β-tubulin (BTUB) genes. Herein, detailed morphological descriptions on characters of the undescribed fungal species as well as their molecular phylogenetic status are provided with comparisons to related species.

First Report of Post-Harvest Fruit Rot of Aronia melanocarpa Caused by Fusarium tricinctum in Korea

Black chokeberry, Aronia melanocarpa (Michx.) Elliott, is commonly used as a source of jam and jelly in Korea and worldwide. A fungal isolate EML-CCB6 was isolated from the decaying fruit of black chokeberry. Based on the morphological characteristics and rDNA internal transcribed spacer sequence analysis, the isolate was identified as Fusarium tricinctum (Corda) Sacc. This is the first report of post-harvest fruit rot of black chokeberry caused by F. tricinctum in Korea.

First Report of Ampelomyces quisqualis from Sycamore and Crape Myrtle and Its Potential as a Mycoparasite of Powdery Mildew

During screening fungi as potential biological control agents for plant parasitic fungi, a fungal strain, EML-FAM3, was isolated from powdery mildew leaf lesions caused by Erysiphe platani on sycamore (Platanus occidentalis L.), and another strain, EML-FAMC1, from Erysiphe australiana on crape myrtle (Lagerstroemia indica L.). Based on the morphological characteristics and phylogenetic analysis of the internal transcribed spacers (ITS1 and ITS2) and 5.8S rDNA, the strains were identified as Ampelomyces quisqualis. To our knowledge, this is the first report of new mycohosts, E. platani and E. australiana, of the mycoparasite A. quisqualis on sycamore and crape myrtle plants. The hyperparasite may represent the potential for controlling E. platani and E. australiana epidemics.

Characterization of Paecilomyces variotii and Talaromyces amestolkiae in Korea Based on the Morphological Characteristics and Multigene Phylogenetic Analyses

Abstract During fungal diversity surveys of the order Eurotiales in Korea, two fungal strains, EML-DG33-1 and EML-NCP50, were isolated from samples of rat dung and fig tree leaf collected at a garden located in Gwangju in 2014. To complete the National Species List of Korea, it is a prerequisite to verify whether many questionable species, which were previously recorded but not confirmed, indeed present in Korea. Herein, the isolates were confirmed as undescribed species, Paecilomyces variotii and Talaromyces amestolkiae based on the combination of morphological and phylogenetic analyses of multigenes including the rDNA internal transcribed spacer, β-tubulin, and RNA polymerase II subunit 2.