Publications by authors named "Gir Won Lee"

The common rust disease of maize is caused by the obligate biotrophic fungus Puccinia sorghi. The maize Rp1-D allele imparts resistance against the P. sorghi IN2 isolate by initiating a defense response that includes a rapid localized programmed cell death process, the hypersensitive response (HR).

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Improvements in long read DNA sequencing and related techniques facilitated the generation of complex eukaryotic genomes. Despite these advances, the quality of constructed plant reference genomes remains relatively poor due to the large size of genomes, high content of repetitive sequences, and wide variety of ploidy. Here, we developed the de novo sequencing and assembly of high polyploid plant genome, Hibiscus syriacus, a flowering plant species of the Malvaceae family, using the Oxford Nanopore Technologies and Pacific Biosciences Sequel sequencing platforms.

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Lichen-forming fungi are mutualistic symbionts of green algae or cyanobacteria. We report the comparative analysis of six genomes of lichen-forming fungi in classes Eurotiomycetes and Lecanoromycetes to identify genomic information related to their symbiotic lifestyle. The lichen-forming fungi exhibited genome reduction via the loss of dispensable genes encoding plant-cell-wall-degrading enzymes, sugar transporters, and transcription factors.

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Alternative splicing (AS) contributes to diversifying and regulating cellular responses to environmental conditions and developmental cues by differentially producing multiple mRNA and protein isoforms from a single gene. Previous studies on AS in pathogenic fungi focused on profiling AS isoforms under a limited number of conditions. We analysed AS profiles in the rice blast fungus , a global threat to rice production, using high-quality transcriptome data representing its vegetative growth (mycelia) and multiple host infection stages.

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Novel coronavirus (SARS-CoV-2) is found to cause a large outbreak started from Wuhan since December 2019 in China and SARS-CoV-2 infections have been reported with epidemiological linkage to China in 25 countries until now. We isolated SARS-CoV-2 from the oropharyngeal sample obtained from the patient with the first laboratory-confirmed SARS-CoV-2 infection in Korea. Cytopathic effects of SARS-CoV-2 in the Vero cell cultures were confluent 3 days after the first blind passage of the sample.

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The rice blast (fungal pathogen: and host: ) is one of the most important model pathosystems for understanding plant-microbe interactions. Although both genome sequences were published as the first cases of pathogen and host, only a few in planta transcriptome data during infection are available. Due to technical difficulties, previously reported fungal transcriptome data are not highly qualified to comprehensively profile the expression of fungal genes during infection.

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The causal agent of root and butt rot of conifer trees, , is widespread in boreal forests and economically responsible for annual loss of approximately 50 million euros to forest industries in Finland alone and much more at European level. In order to further understand the pathobiology of this fungus at the genome level, a Finnish isolate of (isolate 03012) was sequenced and analyzed with the genome sequences of 23 white-rot and 13 brown-rot fungi. The draft genome assembly of has a size of 31.

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Article Synopsis
  • The fungus responsible for Korean oak wilt is causing a significant decline in oak tree populations.
  • This disease is spread by the ambrosia beetle, which acts as a vector for the fungus.
  • The text presents the draft genome sequence of a specific strain of the fungus, identified as KACC44405, which is 27.0 megabases in size.
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Background: Genomic studies on fungal species with hydrolytic activity have gained increased attention due to their great biotechnological potential for biomass-based biofuel production. The amylolytic yeast has served as a good source of enzymes and genes involved in saccharification. Despite its long history of use in food fermentation and bioethanol production, very little is known about the basic physiology and genomic features of .

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Lentinula edodes, the popular shiitake mushroom, is one of the most important cultivated edible mushrooms. It is used as a food and for medicinal purposes. Here, we present the 46.

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Rice blast fungus, Magnaporthe oryzae, is the most destructive pathogen in the rice-growing area. This fungus has a biotrophic phase early in infection and later switches to a necrotrophic lifestyle. During the biotrophic phase, the fungus competes with its host for nutrients and oxygen.

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Article Synopsis
  • - DNA methylation is a key epigenetic modification that influences the development of both plants and animals, and its role in fungi was investigated in the model pathogenic fungus, Magnaporthe oryzae, during growth and reproduction phases.
  • - The study revealed that DNA methylation patterns change significantly during fungal development, indicating it may have additional roles beyond just controlling transposable elements.
  • - Genetic and RNA sequencing analyses demonstrated that proper DNA methylation is crucial for asexual reproduction in the fungus and plays a role in regulating gene expression and defending the genome against transposable elements.
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Lichen Endocarpon pusillum is a highly desiccation-tolerant and dominant species in biological soil crusts in arid and semi-arid regions. We report the draft genome sequence of a lichen-forming fungus, E. pusillum strain KoLRILF000583.

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Cryptochromes are flavoproteins that play a central role in the circadian oscillations of all living organisms except archaea. Cryptochromes are clustered into three subfamilies: plant-type cryptochromes, animal-type cryptochromes and cryptochrome-DASH proteins. These subfamilies are composed of photolyase/cryptochrome superfamily with 6-4 photolyase and cyclobutane pyrimidine dimer photolyase.

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Article Synopsis
  • Umbilicaria muehlenbergii strain KoLRILF000956 can be genetically modified using Agrobacterium tumefaciens, making it the first lichen-forming fungus suitable for genetic studies.
  • Researchers have created a draft genome assembly for U. muehlenbergii, which is about 34.8 million base pairs long and has a GC content of 47.12%.
  • The genome consists of seven scaffolds, contributing to advancements in lichen genetics.
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The lichen-forming fungus Cladonia metacorallifera strain KoLRI002260 is capable of producing a number of secondary metabolites, including usnic, didymic, and squamatic acids, which have antitumor, antioxidant, and antibiotic activities. The draft genome assembly has a size of 36,682,060 bp, with a G+C content of 44.91%, and consists of 30 scaffolds.

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Article Synopsis
  • The study focuses on hot pepper (Capsicum annuum), a widely cultivated spice, detailing its whole-genome sequencing and assembly, revealing it has a genome four times larger than tomato.
  • Researchers also analyzed two cultivated pepper varieties and a wild type (Capsicum chinense), uncovering key genetic elements influencing capsaicinoid (spicy compound) production.
  • The findings emphasize the role of gene expression changes and ripening processes that can enhance the nutritional and medicinal properties of hot peppers.
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Because most efforts to understand the molecular mechanisms underpinning fungal pathogenicity have focused on studying the function and role of individual genes, relatively little is known about how transcriptional machineries globally regulate and coordinate the expression of a large group of genes involved in pathogenesis. Using quantitative real-time PCR, we analyzed the expression patterns of 206 transcription factor (TF) genes in the rice blast fungus Magnaporthe oryzae under 32 conditions, including multiple infection-related developmental stages and various abiotic stresses. The resulting data, which are publicly available via an online platform, provided new insights into how these TFs are regulated and potentially work together to control cellular responses to a diverse array of stimuli.

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Knowledge on mutation processes is central to interpreting genetic analysis data as well as understanding the underlying nature of almost all evolutionary phenomena. However, studies on genome-wide mutational spectrum and dynamics in fungal pathogens are scarce, hindering our understanding of their evolution and biology. Here, we explored changes in the phenotypes and genome sequences of the rice blast fungus Magnaporthe oryzae during the forced in vitro evolution by weekly transfer of cultures on artificial media.

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The ability to sense and adapt to a hostile host environment is a crucial element for virulence of pathogenic fungi, including Cryptococcus neoformans. These cellular responses are evoked by diverse signaling cascades, including the stress-activated HOG pathway. Despite previous analysis of central components of the HOG pathway, its downstream signaling network is poorly characterized in C.

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The genomic sequences of a huge number of species have been determined. Typically, these genome sequences and the associated annotation data are accessed through Internet-based genome browsers that offer a user-friendly interface. Intelligent use of the data should expedite biological knowledge discovery.

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