Publications by authors named "Hyeon-Dong Shin"
Cerastium glomeratum Thuill., known as sticky mouse-ear chickweed, is native to Europe and has become naturalized in the wild on most continents. After its accidental introduction to Korea around the 1980s, it quickly became one of the dominant invasive weeds on the Korean peninsula and is now considered a significant threat to the Korean agroecosystem (Park et al.
View Article and Find Full Text PDFAchillea millefolium L. (Asteraceae), commonly known as yarrow or common yarrow, is native to temperate regions of the Northern Hemisphere in Asia, Europe, and North America (https://www.missouribotanicalgarden.
View Article and Find Full Text PDFA large number of species in the genus Colletotrichum have been reported as causal agents of anthracnose on crops and wild plants in Korea. Many Colletotrichum isolates from the country preserved in the Korean Agricultural Culture Collection (KACC) were previously identified based on host plants and morphological characteristics, and it may lead to species misidentification. Thus, accurate fungal species identification using multilocus sequence analyses is essential for understanding disease epidemiology and disease management strategies.
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- Polygonatum odoratum var. pluriflorum, or Lesser Solomon's seal, is a perennial plant found in temperate regions, valued for its medicinal properties, including tea production.
- In September 2021, a new type of anthracnose, caused by the fungus Colletotrichum, was reported affecting 20-30% of these plants in Chuncheon and Wanju, Korea, showing symptoms like leaf yellowing and brown lesions.
- The disease progressed during the rainy season, leading to significant leaf blight, and five fungal isolates were collected for study, with details about their morphological characteristics noted for further research.
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- Global climate change is causing rust diseases in crops and forests to emerge and spread more severely, particularly in Korea where these diseases are moving northward.
- The study identified a specific rust fungus as the main culprit, which alternates between two host plants to thrive and complete its life cycle.
- By the 2050s, projections indicate that this rust fungus will expand into central Korea due to climate changes, while the original host plant remains stable, emphasizing the complex relationship between climate, host plants, and disease spread.
Powdery mildew is a prevalent fungal disease that affects various spp. (Plantaginaceae), caused by species in the genera and (Erysiphales). There have been recent taxonomic changes in these groups and ongoing disease occurrence on a range of species previously unrecognized as hosts; however, the pathogen found in Korea remains unidentified.
View Article and Find Full Text PDFRust disease poses a major threat to global agriculture and forestry. It is caused by types of Pucciniales, which often require alternate hosts for their life cycles. was previously identified as a rust pathogen on in East and Southeast Asia.
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- Hosta longipes is a perennial plant from Japan and Korea, valued for its edibility and ornamental use, but it has recently faced an anthracnose disease outbreak in Korea with over 70% incidence.
- The disease primarily affects older leaves first, displaying symptoms like yellow to white discoloration and black necrotic tissue, prompting the collection of infected samples for further study.
- Morphological analysis and genetic sequencing of one fungal isolate suggest it is Colletotrichum spaethianum, confirming the disease-causing agent responsible for the observed symptoms.
The Colletotrichum gloeosporioides species complex includes many phytopathogenic species, causing anthracnose disease on a wide range of host plants and appearing to be globally distributed. Seventy-one Colletotrichum isolates in the complex from different plants and geographic regions in Korea were preserved in the Korean Agricultural Culture Collection (KACC). Most of them had been identified based on hosts and morphological features, this could lead to inaccurate species names.
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- Adenophora triphylla var. japonica, or Japanese lady bell, is a medicinal plant native to East Asia and commonly cultivated as a vegetable in Korea.
- In the summer of 2020, an experimental plot in Seoul reported a 100% incidence of powdery mildew on these plants, characterized by white colonies affecting leaves, stems, and inflorescences.
- Fungal structures consistent with Golovinomyces adenophorae were identified through both morphological analysis and DNA sequencing, confirming the pathogen responsible for the outbreak.
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- Xanthium orientale L., commonly known as cocklebur, is an invasive annual weed originally from North America that became problematic in orchards in Korea after its accidental introduction in the late 1970s.
- In September 2018, significant instances of powdery mildew were found on this plant in Jeju, Korea, affecting 40 to 60% of the population, with distinct white patches and hyphal growth on leaves.
- The fungal identity was confirmed as Golovinomyces ambrosiae through detailed morphological analysis and genetic testing, showing high similarity to reference sequences from other Asteraceae plants.
A powdery mildew (Erysiphaceae) has been continuously collected on the leaves of in the southern part of the Korean Peninsula, where this shrub is indigenous. Microscopic examination of the asexual morphs revealed that the current collections are differentiated from the all known species on spp. by its longer conidiophores and longer conidia.
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- - Verbena bonariensis, commonly known as purple-top vervain, is a South American perennial plant that is popular as an ornamental species worldwide and was found to be infected with powdery mildew in a garden in Jeonju, Korea, during the summer and autumn of 2022.
- - The infection led to severe symptoms including white mycelial growth on leaves and stems, which caused discoloration, early leaf drop, and reduced growth and flowering in the plants.
- - Morphological analysis and DNA sequencing confirmed that the fungus responsible for the infection is Podosphaera xanthii, characterized by specific conidiophore structures and spore measurements typical of this pathogen.
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- Erigeron annuus, or annual fleabane, is a North American plant that was accidentally introduced to Korea in the 1910s and is now widely naturalized there, recognized as one of the ten major introduced species by the Korea National Arboretum.
- In September 2012, a significant outbreak of powdery mildew was observed on annual fleabane in Korea, with disease incidence exceeding 80% in some areas, presenting symptoms of white patches and hyphal growth on leaves.
- Detailed microscopic analysis of the mildew revealed characteristics typical of the Golovinomyces genus, specifically G. ambrosiae, with the study confirming the identity of the fungus using molecular techniques on genetic material from herbarium specimens.
Solanum carolinense L. (Solanaceae) is a perennial herbaceous plant native to the southeastern United States. The plant has been invasive in Europe, Australia, and Asia.
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- Symphyotrichum novi-belgii, or New York aster, is a popular perennial herb native to North America, cultivated for gardens and autumn blooms in Korea.
- In September 2011, symptoms of powdery mildew were observed on New York asters in Seoul, which have since spread to various parks and markets across Korea.
- The study identified the fungal disease as caused by Golovinomyces ambrosiae, featuring specific characteristics such as hyphal growth, conidiophores, and conidia, leading to reduced plant health and appearance.
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- Leucanthemum vulgare, commonly known as ox-eye daisy, is a perennial herb native to Europe and western Asia but has become invasive in Korea after being introduced for ornamental use.
- In June 2015, a powdery mildew disease was first spotted on this plant in a public garden in Korea, with incidences of over 80% reported in various locations across the country in subsequent years.
- Microscopic analysis identified the disease's causative fungus as belonging to the genus Golovinomyces, supported by genomic DNA sequencing of herbarium specimens for further identification.
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- - Virginia creeper, a popular climbing plant, showed signs of a rust disease in Korea, marking the first global record of this issue for the species.
- - Researchers identified the rust pathogen affecting Virginia creeper as one that typically targets Boston ivy, suggesting a potential expansion of its host range.
- - This discovery highlights a significant new threat to Virginia creeper as an ornamental plant, raising concerns among horticulturists and gardeners.
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- The tar spot fungus was first identified in 1902 and has been found on several plant species in China, Japan, and Korea, but previous records lacked formal identification methods.
- Researchers confirmed the presence of the tar spot fungus in Korea using both morphological examinations and molecular analyses on six new specimens.
- This study distinguishes the identified tar spot fungus from a similar species based on differences in ascospore size and geographical distribution, while also providing useful DNA sequence data for future identification.
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- - Conyza sumatrensis, also known as fleabane, is a South American plant that was unintentionally introduced to Korea in the 1930s, where it has since become invasive in various ecosystems.
- - Leaf spots on this plant were first noted in 2013 in Jeju, with more severe symptoms observed in Seoguipo by 2017, indicating a significant plant disease affecting more than 50% of the population.
- - The disease was characterized by reddish-brown leaf spots, with the pathogen identified as Septoria erigerontis, leading to the collection and culture of conidia for further study, with specimens and cultures stored in academic collections.
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- Cucurbita ficifolia, or fig-leaf gourd, is a climbing plant from the Americas that was heavily impacted by powdery mildew in an experimental plot in Jeonju, Korea, during summers of 2020.
- The disease presented as white colonies on leaves and stems, leading to leaf senescence and stunted growth, and was identified as caused by the fungus Podosphaera xanthii.
- Genetic analysis confirmed the identity of the fungus with sequences closely matching those in GenBank, and pathogenicity tests were conducted to verify its effects on fig-leaf gourd plants.
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- - Clematis patens, known as big-flower clematis, is a popular ornamental perennial from Northeast Asia, especially cultivated in Korea for gardening and medicinal uses.
- - In September 2021, a rust disease affecting 80% of surveyed C. patens plants was identified in a public park in Jeonju, characterized by light green spots on leaves and yellow-orange pustules below.
- - The disease was linked to Coleosporium clematidis, with both morphological and genetic analyses confirming the pathogen's identity through DNA sequencing, revealing slight variations from other known sequences of the same fungus.
A fungus of the genus , found on leaves of and exhibiting white smut-like symptoms, was identified as based on morphological characteristics and two rDNA sequence analyses. We report the novel occurrence of the genus in Korea and the association of with the host plant species. As well, we provide the necessary mycological information to resolve species delimitation and taxonomic problems of .
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- Verbena bonariensis, commonly known as purple-top vervain, is an ornamental plant native to tropical South America that suffered significant leaf infection from powdery mildew in Seoul during summer and autumn 2020.
- The mildew resulted in white, superficial mycelia on leaves and stems, leading to leaf discoloration, early defoliation, and reduced ornamental appeal of heavily infected plants.
- Morphological and genetic analyses confirmed the causative fungus as belonging to the Golovinomyces genus, with specific characteristics noted in their conidiophores and conidia, and rDNA sequences were uploaded to GenBank for identification.
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- Benincasa hispida, also known as wax gourd or ash gourd, is a plant valued for its medicinal properties and large fruit, commonly grown in Southeast Asia.
- In a 2020 study at Jeonbuk National University, wax gourd leaves were severely affected by powdery mildew, leading to a 100% disease incidence, characterized by white patches on leaves and stunted growth.
- The fungal pathogen identified was Podosphaera xanthii, confirmed through morphological analysis and genetic sequencing, with high similarity to known sequences in GenBank.