• Mycobiology
• /
• v.42 no.3
• /
• pp.221-228
• /
• 2014

The fungal genus Suillus Micheli ex S. F. Gray plays important roles in the survival and growth of plant seedlings. Humans have utilized these ectomycorrhizal fungi to enhance the nutrient uptake and defense systems of plants, particularly in the reforestation of coniferous forests. The genus Suillus is easily distinguishable by its distinctive morphological features, although the morphology of the fruiting body does not facilitate reliable interspecies discrimination. On the basis of micro-morphological features and internal transcribed spacer sequence analysis, we found that 51 of 117 Korean Suillus specimens had initially been misidentified. The list of the 12 Suillus species previously recorded in Korea was re-evaluated and revised to only eight distinct species: S. americanus, S. bovinus, S. granulatus, S. grevillei, S. luteus, S. pictus, S. placidus, and S. viscidus. We provide taxonomical descriptions for six of these species from the sample specimens.

• The Plant Pathology Journal
• /
• v.29 no.4
• /
• pp.435-439
• /
• 2013

Rice blast fungus, Magnaporthe oryzae, inflicts serious damage to global rice production. Due to high variability of this fungal pathogen, resistance of newly-released rice cultivars is easily broken down. To understand the population structure of M. oryzae, we analyzed the genetic diversity of the Korean population using multilocus microsatellite typing. Eleven microsatellite markers were applied to the population of 190 rice isolates which had been collected in Korea for two decades since the 1980's. Average values of gene diversity and allele frequency were 0.412 and 6.5, respectively. Comparative analysis of the digitized allele information revealed that the Korean population exhibited a similar level of allele diversity to the integrated diversity of the world populations, suggesting a particularly high diversity of the Korean population. Therefore, these microsatellite markers and the comprehensive collection of field isolates will be useful genetic resources to identify the genetic diversity of M. oryzae population.

• The Korean Journal of Mycology
• /
• v.27 no.5 s.92
• /
• pp.349-353
• /
• 1999

The genus Stereum is consisted of species having smooth, binucleate amyloid spores, pseudocystidia and dimitic basidiocarps without clamps. There are five recorded species of Stereum in Korea. Through the specimen examination of Seoul National University Fungal Collection, five more species of Stereum, S. subtomentosum, S. peculiare, S. sanguinolentum, S. striatum and S. complicatum, were confirmed as unrecorded species to Korea. They are registered here with Korean names as well as English descriptions and a key to Korean Stereum species is attached together.

• The Plant Pathology Journal
• /
• v.30 no.3
• /
• pp.236-244
• /
• 2014

The plant pathogen Fusarium graminearum causes Fusarium head blight in cereal crops and produces mycotoxins that are harmful to animals and humans. For the initiation and spread of disease, asexual and sexual reproduction is required. Therefore, studies on fungal reproduction contribute to the development of new methods to control and maintain the fungal population. Screening a previously generated transcription factor mutant collection, we identified one putative $C_2H_2$ zincfinger transcription factor, pcs1, which is required for both sexual and asexual reproduction. Deleting pcs1 in F. graminearum resulted in a dramatic reduction in conidial production and a complete loss of sexual reproduction. The pathways and gene ontology of pcs1-dependent genes from microarray experiments showed that several G-protein related pathways, oxidase activity, ribosome biogenesis, and RNA binding and processing were highly enriched, suggesting that pcs1 is involved in several different biological processes. Further, overexpression of pcs1 increased conidial production and resulted in earlier maturation of ascospores compared to the wild-type strain. Additionally, the vegetative growth of the overexpression mutants was decreased in nutrient-rich conditions but was not different from the wild-type strain in nutrient-poor conditions. Overall, we discovered that the pcs1 transcription factor positively regulates both conidiation and sexual reproduction and confers nutrient condition-dependent vegetative growth.

• The Korean Journal of Mycology
• /
• v.36 no.2
• /
• pp.101-115
• /
• 2008

Six species of oak are commonly found in Korean forests growing together with evergreen pines. Korean oak forests have recently been attacked by ambrosial fungi of the genus Raffaelea and by many other fungal species that are vectored by the beetle Platypus koryoensis. We investigated a full list of the diverse decay fungi as a first step to better understand the association between these fungi and oak trees, as well as considering effective management methods for oak forests in Korea. Through examination of specimens deposited in the Seoul National University Fungus Collection (SFC) and the National Institute of Biological Resources (NIBR), 523 decay fungi (104 species) associated with oak trees were identified and a full list is provided.

• Mycobiology
• /
• v.34 no.4
• /
• pp.166-175
• /
• 2006

A total of 149 species and 209 strains of Korean Aphyllophorales in Seoul National University Fungus Collection (SFC) were analyzed by taxonomic and phylogenetic methods. Among those examined fungal specimens, 9 genera Abundisporus, Antrodiella, Cyphellopsis, Dendrothele, Dichomitus, Laxitextum, Piloderma, Skeletocutis and Tubulicrinis, and 23 species, Abundisporus fuscopurpureus, Antrodiella semisupina, Auriporia pileata, Cantharellus subalbidus, Clavulina cinerea, Cyphellopsis confusa, Dendrothele acerina, Dichomitus campestris, Haplotrichum aureum, Heterobasidion annosum, Hyphoderma argillaceum, Hyphodontia tropica, Inonotus dryophilus, Ischnoderma benzoinum, Laxitextum bicolor, Phanerochaete radicata, Phellinus lonicericala, Piloderma byssinum, Skeletocutis nivea, Tomentella terrestris, Trametes elegans, Trametes tenuis, and Tubulicrinis accedens were confirmed as new to Korea and registered here with descriptions.

• Journal of Forest and Environmental Science
• /
• v.33 no.1
• /
• pp.49-65
• /
• 2017

Overall, 3,950 mushroom specimens were collected from the Central Cardamom Protected Forest (CCPF) in Koh Kong province, the Kirirom National Park (KNP) in Kampong Speu province, the Seima Biodiversity Conservation Area (SBCA) in Kratie province, the Mondulkiri Protected Forest (MPF) in Mondulkiri province, the Phnom Bokor National Park (PBNP) in Kampot province, the Western Siem Pang Protected Forest (SPPF) in Stung Treng province, the Ream National Park (RNP) in Sihanoukville province of Cambodia from 2009 to 2014, and then they were identified and classified into 302 species, 165 genera, and 64 families by morphological and genetical characteristics. The mushrooms belongs to Ascomycota were classified into 26 species, 14 genera, and 10 families, while those belongs to Basidiomycota were classified into 276 species, 151 genera, and 54 families, respectively. Among these mushrooms, the most species-rich families are Polyporaceae (26.2%), Marasmiaceae (9.1%), Ganodermataceae (7.7%), Hymenochaetaceae (7.5%), and Mycenaceae (7.1%), and comprised 57.5% of the total specimens identified.

• The Korean Journal of Mycology
• /
• v.19 no.1
• /
• pp.1-10
• /
• 1991

Fresh materials were obtained during collection trips to $Ull\check{u}ng$ Island in October, 1989, and August, 1990. Among them, some resupinate fungi were identified. Seven fungi were confirmed new in Korea and are recorded here with descriptions. They are Gloeocystidiellum karstenii, Peniophora lilacea, Phlebia cremeo-alutacea, P. deflectens, P. livida, Resinicium bicolor, and Hymeno­chaete corrugata.