505 results on '"Jae Seoun Hur"'
Search Results
202. Characterization of two novel non-reducing polyketide synthase genes from the lichen-forming fungus Hypogymnia physodes
- Author
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Jae-Seoun Hur, Jung A Kim, Yong Hwa Cheong, Min Hye Jeong, Jae Sung Jung, and Nan Hee Yu
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biology ,ATP synthase ,Fungus ,biology.organism_classification ,Agricultural and Biological Sciences (miscellaneous) ,Fosmid ,Acyl carrier protein ,chemistry.chemical_compound ,Polyketide ,Biosynthesis ,chemistry ,Biochemistry ,Polyketide synthase ,biology.protein ,Lichen ,Ecology, Evolution, Behavior and Systematics - Abstract
Lichens are known to produce a variety of secondary metabolites including polyketides, which have valuable biological activities. Some polyketides are produced solely by lichens. The biosynthesis of these compounds is primarily governed by iterative type I polyketide synthases. Hypogymnia physodes synthesize polyketides such as physodic, physodalic and hydroxyphysodic acid and atranorin, which are non-reducing polyketides. Two novel non-reducing polyketide synthase (PKS) genes were isolated from a fosmid genomic library of a mycobiont of H. physodes using a 409bp fragment corresponding to part of the reductase (R) domain as a probe. H. physodes PKS1 (Hyopks1) and PKS2 (Hypopks2) contain keto synthase (KS), acyl transferase (AT), acyl carrier protein (ACP), methyl transferase (ME) and R domains. Classification based on phylogeny analysis using the translated KS and AT domains demonstrated that Hypopks1 and Hypopks2 are members of the fungal non-reducing PKSs clade III. This is the first report of non-reducing PKSs containing the R domain-mediated release mechanisms in lichens, which are also rare fungal type I PKS in non-lichenized filamentous fungi.
- Published
- 2012
203. Three New Records of Lichen Genera Opegrapha and Phaeographis from the Republic of Korea
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Soon Ok Oh, Jae Seoun Hur, Santosh Joshi, and Udeni Jayalal
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Morphology ,Graphidaceae ,Roccellaceae ,biology ,New records ,Bogil Island ,Phaeographis ,Opegrapha ,Lichen ,biology.organism_classification ,Microbiology ,Infectious Diseases ,Botany ,Opegrapha viridis ,Research Article - Abstract
This paper provides a description of Opegrapha herbarum, Opegrapha viridis and Phaeographis subdividens, all newly identified in the Republic of Korea. The characteristic features of O. herbarum include Varia-type asci, Subelevata-type ascospores, a lack of secondary metabolites and a saxicolous habitat. O. viridis possesses Calcarea-type asci, Vulgata-type ascospores and no chemicals in the thallus. P. subdividens is recognizable by its curved to sinuous lirellae, divergent labia, a brown and uniformly thick proper exciple which is open at its base, 3~4-septate ascospores, and lack of secondary metabolites. All three taxa are now reported to exist on Bogil Island in the Republic of Korea.
- Published
- 2012
204. Notes on Species of the Lichen Genus Canoparmelia Elix & Hale in South Korea
- Author
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Udeni Jayalal, Jae-Seoun Hur, Jung-Shin Park, Santosh Joshi, and Soon-Ok Oh
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Flora ,Canoparmelia ,Parmeliaceae ,Lichen ,Biology ,biology.organism_classification ,Microbiology ,Canoparmelia carneopruinata ,New record ,Key ,Infectious Diseases ,Genus ,Botany ,Key (lock) ,Research Article - Abstract
Detailed descriptions of five species of the lichen genus Canoparmelia Elix & Hale. are presented. Until now, three species of the genus Canoparmelia, including C. apata (Krempelh.) Elix & Hale, C. owariensis (Asah.) Elix, and C. texana (Tuck.) Elix & Hale have been reported in South Korea. Canoparmelia carneopruinata (Zahlbr.) Elix & Hale, C. crozalsiana (de Lesd.) Elix & Hale, and C. ecaperata (Müll. Arg.) Elix & Hale are new to the South Korean lichen flora. An artificial key is provided for all species of Canoparmelia, including the three new records.
- Published
- 2012
205. New and rediscoveredCaloplaca(Teloschistaceae, Ascomycota) species from Asia
- Author
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Jae-Seoun Hur, B. Zarei-Darki, S. Kondratyuk, and L. Lőkös
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Geography ,Ascomycota ,biology ,Botany ,Basionym ,Coreana ,Taxonomy (biology) ,Plant Science ,biology.organism_classification ,Teloschistaceae ,Ecology, Evolution, Behavior and Systematics ,Caloplaca - Abstract
Descriptions for 5 Caloplaca species new for science (C. chejuensis S. Y. Kondr. et J.-S. Hur, Caloplaca coreana S. Y. Kondr. et J.-S. Hur, C. galbina S. Y. Kondr. et J.-S. Hur (all from Korea), C. loekoesii S. Y. Kondr. et J.-S. Hur (from Korea and China), and C. safavidiorum S. Y. Kondr. et B. Zarei-Darki (from Iran)), as well as descriptions of 3 rediscovered species (Caloplaca diffluens (Hue) Zahlbr. (from Korea and China), C. multicolor (Hue) S. Y. Kondr. et J.-S. Hur, and C. spodoplaca (Nyl.) Zahlbr. (both from Korea), which were described from Korea and Japan more than one century ago and not recorded from that time), including diagnostic characters important for the present taxonomy of the genus Caloplaca s. l., are provided. The new combination, Caloplaca multicolor (Hue) S. Y. Kondr. et J.-S. Hur (Basionym: Lecidea multicolor Hue), is proposed.
- Published
- 2012
206. New species and new records of the lichen genus Porpidia (Lecideaceae) from western China
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Jae Seoun Hur, Xin Yu Wang, Hai Ying Wang, Lu-Lu Zhang, and Yogesh Joshi
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Herbarium ,Geography ,Taxon ,biology ,Genus ,Ecology ,Taxonomy (biology) ,Lecideaceae ,China ,Porpidia ,biology.organism_classification ,Lichen ,Ecology, Evolution, Behavior and Systematics - Abstract
A taxonomic study of the genus Porpidia in western China revealed two species hithertounknown to science, Porpidia squamosa and P. shangrila, along with three new records for the country:P. flavicunda, P. soredizodes and P. thomsonii. Detailed taxonomic descriptions, ecological and chemicalcharacters, and illustrations are provided for the new taxa, and brief taxonomic descriptions providedfor the newly reported taxa. A key to all known Chinese Porpidia species is also provided.Key words: key, saxicolous lichens, taxonomyAccepted for publication 14 April 2012 IntroductionPorpidia Ko¨rb., one of the largest genera seg-regatedfrom Lecidea (Hertel1975),hasbeenwell studied in different parts of the world(Hertel 1975; Gowan 1989; Fryday 2005).Previously only seven species have been re-ported from China (Wei 1991), with mostbeing discovered by Hertel (1977). SinceHertel’s work no further research has beencarried out on the genus in China.Ourstudy wasmainly focused onthewest-ern part of China, which covers nine pro-vinces, Gansu, Guizhou, Ningxia, Qinghai,Shaanxi, Sichuan, Tibet, Yunnan, and Xin-jiang, and one municipality, Chongqing. Itis a region of sunken basins, rolling plateaux,and towering massifs at altitudes varyingfrom less than 500 m to more than 4000 m.The areaincludesfive mainmountainranges:Tianshan, Kunlun, Qilian, Hengduan andHimalaya Mountains; the highest tablelandon Earth is also located in this region.Porpidia specimens were mainly collectedfrom the mountainous regions at an altitudeof more than 1000 m. The first two authorscarried out the field survey, in the most partfrom the mountainous region in south-western China. We also identified many pre-viously unexamined specimens of Porpidialodged in various herbaria in China [HMAS,KUN, SDNU]; these specimens were col-lected from the western part of China. Ourstudies led to the discovery of two new spe-cies, described here in detail, and three newrecords for the Chinese lichen mycota.Materials and Methods
- Published
- 2012
207. A new species and new records of saxicolous species of the genus Lecidella (Lecanoraceae) from South Korea
- Author
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Li-Song Wang, Hai Ying Wang, Xin Yu Wang, Lu-Lu Zhang, and Jae-Seoun Hur
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Lecidella ,biology ,Ecology ,Lecanoraceae ,Botany ,Taxonomy (biology) ,Plant Science ,biology.organism_classification ,Ecology, Evolution, Behavior and Systematics - Abstract
A new species, Lecidella oceanica Lu L. Zhang & Xin Y. Wang, is described here. The new species has been collected from the southwest coast of South Korea and is characterized by small, subimmersed or sessile apothecia, colorless hypothecium and the presence of capistratone, isoarthothelin and thiophanic acid. We also report L. asema is for the first time from South Korea and new localities for L. enteroleucella.
- Published
- 2012
208. Taxonomic Study of the Lichen Genus Lobaria in South Korea
- Author
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Mei-Rong Ren, Jae-Seoun Hur, Young Jin Koh, and Xin Yu Wang
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Morphology ,Lobariaceae ,biology ,Foliose lichen ,Morphology (biology) ,biology.organism_classification ,Microbiology ,Chemistry ,Infectious Diseases ,Genus ,Lobaria ,Botany ,Key (lock) ,Anatomy ,Lichen ,Research Article - Abstract
Lobaria (Schreb.) Hoffm is a common foliose lichen genus found on the Korean Peninsula, yet until now, no revision study has been done on this genus. After careful examination of specimens deposited in the Korean Lichen Research Institute (KoLRI), nine distinct species of Lobaria were confirmed. Morphological characteristics such as the presence or absence of isidia, or whether or not the surface was ridged or smooth, and chemical characteristics such as the result of the medulla reaction were of significant importance in the differentiation of species. Here, we provided detailed descriptions together with a key to all the known Korean species.
- Published
- 2012
209. Antioxidant, Antibacterial activity and Brine shrimp toxicity test of some Mountainous Lichens from Nepal
- Author
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Soon Gyu Hong, Babita Paudel, Hari Datta Bhattarai, Joung Han Yim, Il-Chan Kim, Jae Seoun Hur, and Durga Prasad Pandey
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Lichens ,DPPH ,Peltigera ,Free radicals ,Brine shrimp ,Gram-Positive Bacteria ,Antioxidants ,General Biochemistry, Genetics and Molecular Biology ,chemistry.chemical_compound ,Nepal ,Disk Diffusion Antimicrobial Tests ,Candida albicans ,Gram-Negative Bacteria ,Toxicity Tests ,Ramalina ,Botany ,Animals ,lcsh:QH301-705.5 ,ABTS ,Cladonia ,biology ,Traditional medicine ,General Medicine ,biology.organism_classification ,Ascorbic acid ,Anti-Bacterial Agents ,Antibacterial ,lcsh:Biology (General) ,chemistry ,Artemia ,Antioxidant ,Nepal lichens ,General Agricultural and Biological Sciences ,Antibacterial activity - Abstract
A total of twenty four lichen species belonging to six families were collected from mountainous region of Nepal. The methanol extracts of each species were tested for antimicrobial and antioxidant activities in vitro . It was found that extracts of twenty one lichen species were active against B. subtilis and seven species were active against S. aureus . Similarly, in DPPH assay, three species Peltigera sp., Cladonia sp., and Canoparmelia sp. showed comparable activity with commercial standard, BHA. In ABTS + assay, extracts of Parmoterma sp., Ramalina sp., Peltigera sp. and Cladonia sp. showed stronger activity than ascorbic acid. The observed data after comparison with previously published reports indicated that the high altitude lichens contain stronger antioxidant and antibacterial constituents. Similarly, the methanol extracts of Heterodermia sp. and Ramalina sp. showed comparable toxicity eff ect with commercial standard berberine chloride indicating a potent source of anticancer drugs.
- Published
- 2012
210. The genus Cladonia (lichenized Ascomycota, Cladoniaceae) in South Korea
- Author
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Jae-Seoun Hur, Xin Yu Wang, and Yogesh Joshi
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Taxon ,Ascomycota ,Cladonia ,Genus ,Botany ,Key (lock) ,Plant Science ,Biology ,biology.organism_classification ,Cladoniaceae ,Ecology, Evolution, Behavior and Systematics - Abstract
During a comprehensive study of Cladonia from South Korea, 41 taxa were recognized, including C. dehiscens, C. floerkeana, C. macroptera, and C. rappii var. exilior, new to South Korea. Brief information and discussion are provided for each taxon, together with a key to the taxa recorded from South Korea.
- Published
- 2011
211. Seven new records of foliicolous lichens from Vietnam
- Author
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Young Jin Koh, Thi Thuy Nguyen, Yogesh Joshi, Robert Lücking, Xin Yu Wang, Anh Dzung Nguyen, and Jae-Seoun Hur
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Arthonia ,biology ,Botany ,Porina subnitidula ,Tropics ,Fellhanera ,Plant Science ,Foliicolous ,Calopadia ,biology.organism_classification ,Lichen ,Ecology, Evolution, Behavior and Systematics ,Calenia - Abstract
Seven foliicolous species growing in tropical regions of Vietnam are reported as new to the country. Described are Arthonia accolens, Calenia aspidota, Calopadia subcoerulescens, Coenogonium minimum, Fellhanera rhapidophylli, F. semecarpi, and Porina subnitidula. Among them, Coenogonium minimum and Porina subnitidula are reported for the first time from the paleotropics.
- Published
- 2011
212. Contribution to the lichen mycota of South Korea
- Author
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Jae-Seoun Hur, Yogesh Joshi, L. Lokös, Thi Thuy Nguyen, X.Y. Wang, and Young Jin Koh
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Agriculture ,business.industry ,Ecology ,Global health ,Plant Science ,Biology ,Lichen ,business ,Ecology, Evolution, Behavior and Systematics - Published
- 2011
213. New and noteworthy species of the lichen genus Lecanora (Ascomycota; Lecanoraceae) from South Korea
- Author
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John A. Elix, H. Thorsten Lumbsch, Jae-Seoun Hur, Young Jin Koh, Yogesh Joshi, Lei Lü, and Hai Ying Wang
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Lecanora cenisia ,Ascomycota ,biology ,Lecanoraceae ,Botany ,Norstictic acid ,Lecanora ,Taxonomy (biology) ,Lichen ,biology.organism_classification ,Ecology, Evolution, Behavior and Systematics ,Thallus - Abstract
Two new species, Lecanora hafelliana L. Lü, Y. Joshi & Hur and L. loekoesii Y. Joshi, L. Lü & Hur, are described as new to science from South Korea and eight species, L. campestris (Schaer.) Hue, L. cenisia Ach., L. nipponica H. Miyaw., L. perplexa Brodo, L. plumosa Müll. Arg., L. polytropa (Hoffm.) Rabenh., L. subrugosa Nyl. and L. sulcata (Hue) H. Miyaw., are recorded from South Korea for the first time. Lecanora hafelliana is characterized by the presence of hafellic acid, which is reported for the first time in this genus, while L. loekoesii is characterized by multispored asci and a thallus containing norstictic acid.
- Published
- 2011
214. Caloplaca aequata is a synonym of C. cinnabarina (Teloschistaceae)
- Author
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Holger Thüs, Jae-Seoun Hur, and Yogesh Joshi
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Syntype ,Geography ,biology ,Synonym (taxonomy) ,Genus ,Botany ,Lecanora ,biology.organism_classification ,Teloschistaceae ,Ecology, Evolution, Behavior and Systematics ,Caloplaca - Abstract
In 1915 Hue described Lecanora (sect. Placodium) aequata growing over quartzite rocks from Busan and the Kangwon Provinces of South Korea. Later Zahlbruckner (1931) transferred it to the genus Caloplaca. Careful examination of syntype material of L. aequata lodged at The Natural History Museum, UK (BM) demonstrates that the species is conspecific with C. cinnabarina (Ach.) Zahlbr. and we henceforth synonymize it with that species.
- Published
- 2011
215. Pilophorus fruticosus (Cladoniaceae), a new species from south-western China
- Author
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Jae-Seoun Hur, Xin Yu Wang, Soon Ok Oh, Li-Song Wang, and Yogesh Joshi
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Taxon ,biology ,Ecology ,Botany ,Taxonomy (biology) ,biology.organism_classification ,China ,Cladoniaceae ,Pilophorus ,Ecology, Evolution, Behavior and Systematics - Abstract
Pilophorus fruticosus Li S. Wang & Xin Y. Wang is described from south-west China. It is characterized by the presence of densely dichotomously branched, partly decorticated pseudopodetia, and by having single, spherical apothecia on the apices of the pseudopodetia. The species grows on siliceous rocks in alpine regions of the Yunnan Province. A detailed description and illustrations are provided. The new taxon is compared with other Pilophorus species.
- Published
- 2011
216. Production of Anti-Helicobacter pylori metabolite by the lichen-Forming fungus Nephromopsis pallescens
- Author
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Hae-Sook Jeon, Young Jin Koh, Heng Luo, Jae Sung Jung, Jae-Seoun Hur, Yan Peng Liu, and Yoshikazu Yamamoto
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medicine.drug_class ,Metabolite ,Antibiotics ,Microbial Sensitivity Tests ,Fungus ,Biology ,Applied Microbiology and Biotechnology ,Microbiology ,chemistry.chemical_compound ,Ascomycota ,medicine ,Incubation ,Chromatography, High Pressure Liquid ,Benzofurans ,Helicobacter pylori ,Temperature ,Usnic acid ,General Medicine ,Hydrogen-Ion Concentration ,biology.organism_classification ,Anti-Bacterial Agents ,Culture Media ,chemistry ,Chromatography, Thin Layer ,Aeration ,Antibacterial activity - Abstract
The present study was conducted to evaluate the antibacterial activity of lichen-forming fungi (LFF) against Helicobacter pylori, and to optimize the culture conditions of LFF for maximum production of natural antibiotics against H. pylori. To accomplish this, a screening assay was first conducted among 19 species of LFF. The extract of Nephromopsis pallescens (KOLRI-040516) exhibited the strongest anti-ff. pylori activity. Bioautograghic TLC and HPLC analysis identified usnic acid as the main antibacterial substance produced by JV. pallescens. The growth of JV. pallescens and production of antibacterial substances produced by the fungus were then investigated under several culture conditions including the culture media, initial medium pHs, incubation temperatures, and the degree of aeration. The results indicated that culture in MY medium with an initial pH of 6.0, a temperature of 15°C and a low degree of aeration supported the largest usnic acid production of the fungus (16.4 ug usnic acid/g dry biomass). Especially, aeration was found to be an important factor that affect both growth and usnic acid production of N. pallescens.
- Published
- 2011
217. Isolation and characterization of a non-reducing polyketide synthase gene from the lichen-forming fungus Usnea longissima
- Author
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Yi Wang, Jae-Seoun Hur, Young Jin Koh, Jung A Kim, and Yong Hwa Cheong
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biology ,Sequence analysis ,biology.organism_classification ,Agricultural and Biological Sciences (miscellaneous) ,Orsellinic acid ,Polyketide ,Acyl carrier protein ,chemistry.chemical_compound ,Thioesterase ,Biochemistry ,chemistry ,Aspergillus nidulans ,Acyltransferase ,Polyketide synthase ,biology.protein ,Ecology, Evolution, Behavior and Systematics - Abstract
Usnea longissima has long been used as a traditional medicine in China, India, Turkey, Canada and Europe. This lichen can produce several bioactive compounds that primarily belong to the polyketide family. The enzymes responsible for the production of these compounds are the polyketide synthases, but the biosynthetic processes in lichens are still unclear. In this study, a cultured mycobiont of Usnea longissima was used to isolate and characterize a polyketide synthase gene (UlPKS1). Complete sequence information regarding UlPKS1 (6,468 bp) was obtained by screening a Fosmid genomic library using a 512-bp fragment corresponding to part of the ketosynthase (KS) domain. Sequence analysis of UlPKS1 suggested that it contained features of a non-reducing fungal type I PKS with a starter unit of ACP transacylase (SAT), ketosynthase (KS), product template (PT), acyl carrier protein (ACP) transacylase, acyltransferase (AT) and thioesterase (TE) domain, and had five intervening introns. The domain organization of UlPKS1 (SAT-KS-AT-PT-ACP-ACP-TE) was quite similar to that of aromatic PKSs, and phylogenetic analysis showed that UlPKS1 belonged to the clade of lichenized fungal non-reducing PKS. RT-PCR analyses revealed that the expression of UlPKS1 was down-regulated by glycine and high concentrations of sorbitol, inositol and fructose and up-regulated by sucrose and glucose. Here, we introduce a non-reducing PKS gene in the lichen-forming fungus U. longissima, with a domain structure similar to the structure of orsellinic acid synthase A (OrsA) which is required for orsellinic acid biosynthesis in Aspergillus nidulans.
- Published
- 2011
218. Outbreak of bacterial canker on Hort16A (Actinidia chinensisPlanchon) caused byPseudomonas syringaepv. actinidiaein Korea
- Author
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Young-Jin Koh, Jae-Seoun Hur, Young Sun Lee, Jae Sung Jung, and Gyoung Hee Kim
- Subjects
Actinidia deliciosa ,Bacterial canker ,Actinidia chinensis ,biology ,Spots ,food and beverages ,Outbreak ,Horticulture ,biology.organism_classification ,Botany ,Pseudomonas syringae ,Blight ,Agronomy and Crop Science ,Pruning - Abstract
Bacterial canker was first observed on the kiwifruit cv. ‘Hort16A (Actinidia chinensis)’ in Jeju Province, Korea, in spring 2006. Die back or blight on young canes, often with red-rusty exudation on canes or trunks, and dark brown irregular spots surrounded with yellowish halos on leaves are the typical symptoms. These symptoms closely resemble those caused by Pseudomonas syringae pv. actinidiae on the kiwifruit cv. ‘Hayward (Actinidia deliciosa)’. A sudden outbreak and rapid spread of the bacterial canker resulted in the death of severely infected vines and eradication of completely devastated orchards of the kiwifruit cv. ‘Hort16A’. Contaminated pruning shears and climatic conditions appear to have been responsible for the sudden outbreak and rapid spread of the epidemics on the kiwifruit cv. ‘Hort16A’ vines. The causal bacterium was isolated from diseased vines of the kiwifruit cv. ‘Hort16A’ and identified as P. syringae pv. actinidiae, which is the same bacterial pathogen responsible for cank...
- Published
- 2010
219. Notes on Some New Records of Foliicolous Lichens from Vietnam
- Author
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Thi Thuy Nguyen, Yogesh Joshi, Robert Lücking, Xin-Yu Wang, Nguyen Anh Dzung, Young-Jin Koh, and Jae-Seoun Hur
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lcsh:Biology (General) ,Lichenized fungi ,East Asia ,Geographical distribution ,lcsh:QH301-705.5 ,Taxonomy - Abstract
Six new records of foliicolous lichens for Vietnam are described and illustrated. These are: Aderkomyces albostrigosus f. albostrigosus, A. albsostrigosus f. aggregatus, Asterotherium rotuliforme, Byssoloma vanderystii, Fellhanera emarginata and Trichothelium minutum. The species were collected at Thác Dray Sap region (commonly called Dray Sac Waterfall) situated in the Central Highland part of Vietnam.
- Published
- 2010
220. A first modern contribution to Caloplaca biodiversity in South Korea: two new species and some new country records
- Author
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Young Jin Koh, Yoshikazu Yamamoto, Yogesh Joshi, Xin Yu Wang, and Jae-Seoun Hur
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chemistry.chemical_compound ,Secondary chemistry ,biology ,chemistry ,Lecanoric acid ,Botany ,Biodiversity ,East Asia ,biology.organism_classification ,Gyrophoric acid ,Teloschistaceae ,Ecology, Evolution, Behavior and Systematics ,Caloplaca - Abstract
Eleven species are recognized of which C. bogilana and C. subflavorubescens are described here as new to science while nine species (C. cinnabarina, C. decipiens, C. ferruginea, C. inconspecta, C. pellodella, C. scopularis, C. stantonii, C. squamosa and C. subsoluta) are reported for the first time for South Korea. Both new species are peculiar due to their secondary chemistry; anthraquinones along with atranorin, gyrophoric acid and lecanoric acid in C. bogilana, and gyrophoric acid together with anthraquinones in C. subflavorubescens.
- Published
- 2010
221. Antioxidant activities of edible lichen Ramalina conduplicans and its free radical-scavenging constituents
- Author
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Jae Sung Jung, Young Jin Koh, Jae-Seoun Hur, Heng Luo, Yoshikazu Yamamoto, Li-Song Wang, Yanpeng Liu, and Xinli Wei
- Subjects
Antioxidant ,food.ingredient ,Linoleic acid ,medicine.medical_treatment ,Food additive ,Biology ,High-performance liquid chromatography ,Thin-layer chromatography ,chemistry.chemical_compound ,food ,chemistry ,Biochemistry ,medicine ,Food science ,Medicinal plants ,Lichen ,Scavenging ,Ecology, Evolution, Behavior and Systematics - Abstract
The aim of this study was to evaluate the antioxidant properties of an edible lichen Ramalina conduplicans. The extract exhibited potent anti-linoleic acid peroxidation activity, free radical-scavenging activity, and reducing power. The total phenolic contents were found to be high in the extract. Activity-guided bioautographic thin layer chromatography (TLC) and HPLC identified sekikaic acid and homosekikaic acid as the main free radical-scavenging compounds in R. conduplicans extract (IC(50) [50% inhibition concentration] = 0.082 and 0.276 mg/ml, respectively). The results suggested that this edible lichen species have the potential to be utilized as food additives or as protective drugs.
- Published
- 2010
222. Taxonomic studies on the lichen flora of southwestern China (1). Pilophorus yunnanensis sp. nov. (Cladoniaceae)
- Author
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Jae Seoun Hur, Xin Yu Wang, Soon Ok Oh, Li-Song Wang, and Yogesh Joshi
- Subjects
Ascocarp ,Taxon ,biology ,Botany ,Taxonomy (biology) ,Plant Science ,biology.organism_classification ,China ,Lichen ,Cladoniaceae ,Pilophorus ,Ecology, Evolution, Behavior and Systematics - Abstract
Taxonomic studies on lichen genus Pilophorus in China revealed a hitherto unknown species to science, which is here described as new: Pilophorus yunnanensis L. S. Wang & X. Y. Wang. It is characterized by small, simple, unbranched pseudopodetia having numerous scales, single (rarely two) globose apothecia at the tip and the lack of a columella. The species is reported from high elevations in Yunnan Province in southwestern China and was collected from siliceous rocks exposed to sun. Description and figures are provided on the basis of this material and the new taxon is compared with other Pilophorus species.
- Published
- 2010
223. New species in the family Graphidaceae (Ascomycota: Ostropales) from the Philippines
- Author
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Jae-Seoun Hur, Paulina A. Bawingan, Santosh Joshi, and Dalip K. Upreti
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Taxon ,biology ,Ascomycota ,Botany ,Ostropales ,Graphidaceae ,Taxonomy (biology) ,Thalloloma ,Plant Science ,Thelotrema ,biology.organism_classification ,Lichen ,Ecology, Evolution, Behavior and Systematics - Abstract
In the present paper three new species viz. Thalloloma nitidum, Thelotrema isidiosum and T. megasporum belonging to lichen family Graphidaceae are described from the Philippines and compared with the closely related taxa.
- Published
- 2018
224. Antioxidant activities of edible lichen Ramalina conduplicans and its free radical-scavenging constituents
- Author
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Heng Luo, Xinli Wei, Yoshikazu Yamamoto, Yanpeng Liu, Lisong Wang, Jae Sung Jung, Young Jin Koh, and Jae-Seoun Hur
- Subjects
Ecology, Evolution, Behavior and Systematics - Published
- 2010
225. Heavy Metal Concentrations in the Fruticose Lichen Usnea aurantiacoatra from King George Island, South Shetland Islands, West Antarctica
- Author
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Myung Ja Han, Hyun Park, Dong-Cheol Seo, Ho Il Yoon, Yong Hwa Cheong, Jong Soo Heo, Jae Il Lee, Jae-Seoun Hur, Ju-Sik Cho, Hyoun Soo Lim, and Ji Hee Kim
- Subjects
Shetland ,Pollutant ,geography ,geography.geographical_feature_category ,Ecology ,Organic Chemistry ,General Biochemistry, Genetics and Molecular Biology ,Thallus ,Peninsula ,Biomonitoring ,Environmental science ,Trace metal ,Physical geography ,Lichen ,Fruticose lichen - Abstract
The accumulation of selected heavy metals in the fruticose lichen Usnea aurantiacoatra is reported in the vicinity of the Korean research station on Barton Peninsula, King George Island, West Antarctica. To assess the impact of human activities in the study area, all samples were divided into five groups according to distance from the research station. The corresponding heavy metal levels in samples near the station were relatively higher than those collected far from the station. In particular, a very high level of Pb near the station strongly suggests the anthropogenic release of this pollutant. The relationship between trace metal content and age of the lichen was investigated, but no significant difference was found. When evaluating the vertical distribution of heavy metals in lichen thalli, most elements, particularly Pb, accumulated preferentially in the upper parts, probably due to the morphology of U. Aurantiacoatra. Therefore, the vertical distribution of heavy metals in fruticose lichens should be considered to enhance data quality in biomonitoring studies.
- Published
- 2009
226. Causal Agents of Blossom Blight of Kiwifruit in Korea
- Author
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Gyoung Hee Kim, Young Sun Lee, Jae Seoun Hur, Hyo Shim Han, Jae Sung Jung, and Young Jin Koh
- Subjects
biology ,fungi ,Stamen ,food and beverages ,Pseudomonas fluorescens ,16S ribosomal RNA ,biology.organism_classification ,Pathogenicity ,Carbon source ,Botany ,Pseudomonas syringae ,Blight ,Internal transcribed spacer ,Agronomy and Crop Science - Abstract
The causal agents of bacterial blossom blight in kiwifruit were isolated from flowers displaying symptoms in Korea. The pathogens were characterized by biochemical and physiological tests, and identified on the basis of 16S rDNA and 16S-23S internal transcribed spacer (ITS) sequences. Pathogenicity tests demonstrated that the blossom blight of kiwifruit in Korea is caused by two pathogens, Pseudomonas syringae pv. syringae and P. fluorescens. Carbon source utilization and DNA-DNA hybridization experiments confirmed P. fluorescens as one of the causal agents of blossom blight of kiwifruit. P. syringae pv. syringae and P. fluorescens can be distinguished from each other by the symptoms they produce in flowers. P. syringae pv. syringae primarily affected the stamen, while P. fluorescens caused rotting of all internal tissues of buds or flowers.
- Published
- 2009
227. Anti-proliferative effects of Lethariella zahlbruckneri extracts in human HT-29 human colon cancer cells
- Author
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Kwon-Il Seo, Jae-Seoun Hur, Myung-Woo Byun, Chi-Nam Seong, Jae-Yong Kim, Mei Rong Ren, Il-Yun Jeong, Mi-Kyung Lee, Seong-Chan Park, and Kyoung-Wuk Park
- Subjects
Programmed cell death ,Lichens ,Cell Survival ,Blotting, Western ,Cell ,Apoptosis ,Biology ,Toxicology ,Acetone ,Bcl-2-associated X protein ,medicine ,Humans ,Cell Proliferation ,bcl-2-Associated X Protein ,Caspase 8 ,Plant Extracts ,Cell growth ,Methanol ,Apoptosis Inducing Factor ,DNA, Neoplasm ,General Medicine ,Cell cycle ,Antineoplastic Agents, Phytogenic ,Molecular biology ,Caspase 9 ,medicine.anatomical_structure ,Proto-Oncogene Proteins c-bcl-2 ,Biochemistry ,Cell culture ,Colonic Neoplasms ,biology.protein ,Apoptosis-inducing factor ,Drug Screening Assays, Antitumor ,HT29 Cells ,Food Science - Abstract
This study was performed to elucidate the anti-proliferative effects and the apoptotic mechanisms of extracts from Lethariella zahlbruckneri in HT-29 human colon cancer cells. Both the acetone extract (AEL) and methanolic extract (MEL) of L. zahlbruckneri decreased viable cell numbers in a dose- and time-dependent manner in HT-29 cells. The AEL showed stronger cytotoxicity than MEL. Cell death induced by AEL increased cell populations in the sub-G1 phase, as well as the formation of apoptotic bodies and nuclear condensation, whereas MEL did not. Therefore, the potential of AEL to induce apoptosis was examined. Apoptosis induced by AEL was associated with the activation of initiator caspases-8 and -9, as well as the effector caspase-3. AEL stimulated Bid cleavage. This indicated that the apoptotic action of caspase-8-mediated Bid cleavage leads to the activation of caspase-9. AEL increased the expression of the pro-apoptotic protein, Bax, and decreased the expression of the anti-apoptotic protein, Bcl-2. AEL also increased the expression of the caspase-independent mitochondrial apoptosis factor, AIF, in HT-29 cells. These results indicate that AEL inhibited HT-29 cell proliferation by inducing apoptosis, which might be mediated via both caspase-dependent and -independent pathways.
- Published
- 2009
228. Report on the Lichen List of North Korea
- Author
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László Lökös, Jae-Seoun Hur, Young-Jin Koh, Hae-Sook Jeon, Bong-Kyu Byun, and You-Mi Lee
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Natural history ,geography ,Herbarium ,geography.geographical_feature_category ,Ecology ,Peninsula ,Plant Science ,Biology ,Lichen ,Ecology, Evolution, Behavior and Systematics ,Checklist - Abstract
Total 222 lichen specimens of North Korea including 23 family, 54 genera and 119 species were newly obtained from the Hungarian Natural History Museum for the last 3 years. Among them, 12 species were added to Korean lichen checklist as new. All the species were deposited at the herbarium of Korea National Arboretum. In addition, unpublished list of lichen species distributed in Mt. Myohang was kindly donated from the Hungarian Natural History Museum. The list was originally prepared by North Korean lichenologists and kept in the museum from 1988. In the list, 26 family, 57 genera and 179 species of lichens were described and 17 species were included as new reports. This list provided 29 lichen species as new to the Korean Peninsula. This information will make significant contribution to lichenological study in the Korean Peninsula.
- Published
- 2009
229. Isolation of Lichen-forming Fungi from Hungarian Lichens and Their Antifungal Activity Against Fungal Pathogens of Hot Pepper Anthracnose
- Author
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Keon Seon Han, Young Jin Koh, Jae Seoun Hur, Hae Sook Jeon, László Lökös, Jung A Kim, and Jung Ae Ryu
- Subjects
Fungicide ,Colletotrichum acutatum ,fungi ,Botany ,Cladonia furcata ,Lasallia pustulata ,Xanthoparmelia conspersa ,Biology ,biology.organism_classification ,Lichen ,Agronomy and Crop Science ,Mycelium ,Thallus - Abstract
Lichen-forming fungi (LEF) were isolated from 67 Hungarian lichen species from ascospores or thallus fragments. LFF were successfully isolated from 26 species with isolation rate of 38.8%. Of the total number of isolation from ascospores (27 species) and thallus fragments (40 species), 48% and 32.5% of the species were successfully isolated, respectively. Comparison of rDNA sequences of ITS regions between the isolated LFF and the original thallus confirmed that all the isolates originated from the thallus fragments were LEF. The following 14 species of LEF were newly isolated in this study; Acarospora cervina, Bacidia rubella, Cladonia pyxidata, Lasallia pustulata, Lecania hyaline, Lecanora argentata, Parmelina tiliacea, Parmotrema chinense, Physconia distorta, Protoparmeliopsis muralis, Ramalina pollinaria, Sarcogyne regularis, Umbilicaria hirsuta, Xanthoparmelia conspersa and X. stenophylla. Antifungal activity of the Hungarian LFF was evaluated against plant pathogenic fungi of Colletotrichum acutatum, C. coccodes and C. gloeosporioides, causal agent of anthracnose on hot pepper. Among the 26 isolates, 11 LFF showed more than 50% of inhibition rates of mycelial growth of at least one target pathogen. Especially, LFF of Evernia prunastri, Lecania hyalina and Lecanora argentata were remarkably effective in inhibition of mycelial growth of all the tested pathogens with antibiotic mode of action. On the other hands, five isolates of Cladonia furcata, Hypogymnia physodes, Lasallia pustulata, Ramalina fastigiata and Ramalina pollinaria exhibited fungal lytic activity against all the three pathogens. Among the tested fungal pathogens, C. coccodes seemed to be most sensitive to the LFF. The Hungarian LFF firstly isolated in this study can be served as novel bioresources to develop new biofungicides alternative to current fungicides to control hot pepper anthracnose pathogenic fungi.
- Published
- 2009
230. Biological Control of Tea Anthracnose Using an Antagonistic Bacterium of Bacillus subtilis Isolated from Tea Leaves
- Author
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Myoung Taek Lim, Jae Seoun Hur, Young Jin Koh, Gyoung Hee Kim, and Kyu Jin Yum
- Subjects
biology ,Biological pest control ,food and beverages ,Single application ,Bacillus subtilis ,Pesticide ,biology.organism_classification ,Fungicide ,Horticulture ,Colletotrichum ,Botany ,Phyllosphere ,Agronomy and Crop Science ,Bacteria - Abstract
An antagonistic bacterium of Bacillus subtilis BD0310 against Colletotrichum theae-sinensis was isolated from the phylloplane of tea trees at a tea plantation in Korea. SC (suspension concentrate)-type biofungicide was formulated with the antagonist. Cell viability and antifungal activity of B. subtilis were maintained in the formulation more than 12 months at room temperature. The antagonist was sensitive only to copper sulfate among the chemical pesticides currently registered for tea trees in Korea. Greenhouse application demonstrated that the biofungicide controlled more effectively the disease in a protective mode than in a curative mode. Field trial showed that alternate applications of the biofungicide and chemical fungicide were more effective in controlling tea anthracnose than single application of the biofungicide or chemical fungicide with less use of chemicals. This study suggests that the biofungicide of B. subtilis 8D0310 is an effective method for biological control of anthracnose in tea plantations.
- Published
- 2009
231. Lecanoric acid, a secondary lichen substance with antioxidant properties from Umbilicaria antarctica in maritime Antarctica (King George Island)
- Author
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Heng Luo, Jae Sung Jung, Jae-Seoun Hur, Jung A Kim, Young Jin Koh, and Yoshikazu Yamamoto
- Subjects
Free Radical Scavenging Activity ,Antioxidant ,medicine.medical_treatment ,fungi ,Umbilicaria antarctica ,Biology ,Cetraria aculeata ,biology.organism_classification ,Lecanoric acid ,Botany ,Cladonia furcata ,medicine ,General Agricultural and Biological Sciences ,Lichen ,Usnea aurantiacoatra - Abstract
Eight lichen species, Cetraria aculeata, Cladonia furcata, Pseudephebe pubescens, Sphaerophorus globosus, Stereocaulon alpinum, Umbilicaria antarctica, Usnea antarctica and Usnea aurantiacoatra, were collected from King George Island, maritime Antarctica, for the evaluation of antioxidant activities. Anti-linoleic acid peroxidation activity, free radical scavenging activity, reducing power and superoxide anion scavenging activity were assessed of methanol and acetone extract of the lichens in vitro. Extract of Umbilicaria antarctica, Cladonia furcata, Sphaerophorus globosus and Usnea antarctica were found to have strong in vitro antioxidant properties. In general, acetone extract exhibited stronger activities than methanol extract. The activity-guided bioautographic TLC and HPLC analysis demonstrated that lecanoric acid was the main antioxidant compound in the acetone extract of Umbilicaria antarctica, the most potent antioxidant lichen species among the test species. The results suggested that several Antarctic lichens and their substances can be used as novel bioresources of natural antioxidants.
- Published
- 2009
232. Antifungal Activity of Eucalyptus-Derived Phenolics Against Postharvest Pathogens of Kiwifruits
- Author
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Hyun Hur, Jung A Kim, Jong Cheol Park, Young Jin Koh, Soon Ok Oh, Jae Seoun Hur, and Hae Sook Jeon
- Subjects
chemistry.chemical_classification ,biology ,Flavonoid ,Botryosphaeria dothidea ,biology.organism_classification ,Fungicide ,Horticulture ,chemistry.chemical_compound ,chemistry ,Botany ,Spore germination ,Postharvest ,Gallic acid ,Agronomy and Crop Science ,Mycelium ,Botrytis cinerea - Abstract
Antifungal activities of natural substrances from Eucalyptus darlympleana, E. globules, E. gunnii and E. unigera were evaluated against postharvest pathogens of kiwifruits, Botrytis cinerea, Botryosphaeria dothidea, and Diaporthe actinidiae, to screen effective natural substances as an alternative to chemical fungicides. Methanol extract of the Eucalyptus trees showed strong antagonistic activity against the pathogenic fungi. Among them, E. unigera and E. darlympleana effectively inhibited mycelial growth of the pathogens. For chemical identification of the antifungal substances, the methanol extract of E. darlympleana leaves was successively partitioned with CH(2)Cl(2), EtOAc, n-BuOH and H(2)O. Among the fractions, CH,Cl, and n-BuOH showed strong inhibitory activity of mycelial growth of the fungi. Five compounds were isolated from EtOAc and n-BuOH fractions subjected to SiO(2) column chromatography. Two phenolic compounds (gallic acid and 3,4-dihydroxy-benzoic acid) and three flavonoid compounds (quercetin, quercetin-3-O-alpha-L-rhamnoside, quercetin-3-O-beta-D-glucoside) were identified by (1)H-NMR and (13)C-NMR spectroscopy. Among them, only gallic acid was found to be effective in mycelial growth and spore germination of B. cinerea at relatively high concentrations. The results suggest that gallic acid can be a safer and more acceptable alternative to current synthetic fungicides controlling soft rot decay of kiwifruit during postharvest storage.
- Published
- 2008
233. Antifungal Activity of Lichen-forming Fungi against Colletotrichum acutatum on Hot Pepper
- Author
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Xinli Wei, Keon Seon Han, Hae Sook Jeon, Young Jin Koh, and Jae Seoun Hur
- Subjects
Parmelia ,biology ,Colletotrichum acutatum ,Umbilicaria esculenta ,Pepper ,Botany ,Pathogenic fungus ,biology.organism_classification ,Agronomy and Crop Science ,Mycelium ,Thallus ,Spore - Abstract
Antifungal activity of Korean and Chinese lichen-forming fungi (LFF) was evaluated against plant pathogenic fungus of Colletotrichum acutatum, causal agent of anthracnose on hot pepper. This is the first attempt to evaluate antifungal activity of LFF, instead of lichen thalli, against C. acutatum. Total 100 LFF were isolated from the lichens with discharged spore method or tissue culture method. Among the 100 isolates, 8 LFF showed more than 50% of inhibition rates of mycelial growth of the target pathogen. Especially, Lecanora argentata was highly effective in inhibition of mycelial growth of C. accutatum at the rate of 68%. Antifungal activity of other LFF was in the order of Cetrelia japonica (61.4%), Ramalina conduplicans (59.5%), Umbilicaria esculenta (59.5%), Ramalina litoralis (56.7%), Cetrelia braunsiana (56.5%), Nephromopsis pallescensn (56.1%), and Parmelia simplicior (53.8%). Among the tested LFF, 61 isolates of LFF exhibited moderate antifungal activity against the target pathogen at the inhibition rates from 30 to 50%. Antifungal activity of the LFF against C. acutatum was variable at the species level rather than genus level of LFF. This study suggests that LFF can be served as a promising bioresource to develop novel biofungicides.
- Published
- 2008
234. Incidences of Leaf Spots and Blights on Kiwifruit in Korea
- Author
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Myoung Taek Lim, Jong Sup Shin, Gyung Hee Kim, Hyun Su Park, Min Ji Kim, Tae Woong Han, Soon Ho Shin, Jae Seoun Hur, Young Jin Koh, In Ho Jeong, and Hong Chul Kim
- Subjects
Actinidia deliciosa ,Spots ,biology ,Phomopsis ,Botany ,Blight ,Leaf spot ,biology.organism_classification ,Pestalotiopsis ,Agronomy and Crop Science ,Glomerella cingulata ,Alternaria alternata - Abstract
Various kinds of leaf spots and blights were found in kiwifruit (Actinidia deliciosa) orchards on 2006 in Korea. Disease incidences were quite variable between open-field and rain-proof shelter. Rate of diseased leaves was recorded as about 70% at open-field orchards in late season but use of rain-proof vinyl shelters alleviated the disease incidences by 20%. Angular leaf spots appeared at early infection stage on June and several other symptoms were also recognized as the disease developed afterward. On September, brown leaf blights were the most frequent, followed by grayish brown ring spots, silvering gray leaf blights, zonate leaf blights, dark brown ring spots and angular leaf spots at open-field orchards. Four fungal species were frequently isolated from the disease symptoms. Phomopsis sp. was the most predominant fungus associated with the leaf spot and blight symptoms on kiwifruit, followed by Glomerella cingulata, Alternaria alternata and Pestalo-tiopsis sp. Phomopsis sp. was commonly isolated from angular leaf spots, silvering gray leaf blights, and zonate brown leaf blights. G. cingulata, A. alternata and Pestalotiopsis sp. were isolated from grayish brown ring spots (anthracnose), brown ring spots and zonate dark brown leaf blights. Typical symptoms appeared on the wounded and unwounded leaves, which were inoculated by each of Phomopsis sp., G. cingulata, and Pestalotiopsis sp., but A. alternata caused symptoms only on the wounded leaves.
- Published
- 2008
235. Control of Gray Blight of Tea Plants Using a Biofungicide
- Author
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Young-Jin Koh, Jae-Seoun Hur, Gyoung-Hee Kim, Myoung-Taek Lim, and Kyu-Kim Yum
- Subjects
Mass culture ,biology ,Inoculation ,fungi ,food and beverages ,Plant Science ,biology.organism_classification ,Biochemistry ,Fungicide ,Horticulture ,Tea plantation ,Blight ,Pestalotiopsis longiseta ,Agronomy and Crop Science ,Molecular Biology ,Biotechnology - Abstract
Bacillus subtilis BD0310 isolated from tea leaves was used for the development of a biofungicide against Pestitalotiopsis longiseta causing gray blight of tea plants. After mass culture of the antagonistic bacteria, the biofungicide formulated as a suspension concentrate was evaluated for its control efficacy against the gray blight of tea plant in a greenhouse and a tea plantation, respectively. Spray of the biofungicide 2 days before inoculation of P. longiseta inhibited more efficiently the development of gray blight compared with spray of the biofungicide 2 days after inoculation of the pathogen onto the leaves of tea plants in a greenhouse. In the field investigation under application of the biofungicide in 2005 and 2006, control efficiencies increased according to the number of spray of the biofungicide. Control efficiencies of the biofungicide were 52.4%, 66.7%, 71.4% and 85.7% against gray blight in 4 times spray of the biofungicide alone at 7 days interval, 6 times spray of the biofungicide alone at 7 days interval, 2 times alternate spray of biofungicide and chemical fungicide at 7 days interval and 4 times spray of chemical fungicide alone at 7 days interval, respectively. Therefore, the alternate application of the biofungicide and chemical fungicide at 7 days interval can increase the control efficiency with reduction of the amount of chemical fungicides and the number of spray for the control of gray blight of tea plants in the field.
- Published
- 2008
236. Lichen Diseases on Prunus mume Caused by Colonization of Consortium of Several Crustose Lichens Including Parmotrema autrosinense
- Author
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Jae-Seoun Hur, Myoung-Taek Lim, Gyu-San Lee, Gyoung-Hee Kim, Young-Jin Koh, In-Ho Jeong, Hyun-Su Park, and Kyoung-Youn Jo
- Subjects
integumentary system ,biology ,Parmotrema ,Plant Science ,biology.organism_classification ,Biochemistry ,Thallus ,stomatognathic diseases ,Prunus ,Horticulture ,stomatognathic system ,Botany ,Blight ,Green algae ,Colonization ,skin and connective tissue diseases ,Lichen ,Crustose ,Agronomy and Crop Science ,Molecular Biology ,Biotechnology - Abstract
Lichen is a symbiotic association which lichen-forming fungi associate with green algae or cyanobacteria capable of producing food by photosynthesis. Lichen is one of the most widely distributed eukaryotic organisms on every kind of surface of soils, rocks and trees. Lichen-forming fungi commonly colonize on the surface of barks of dead or dying trees, which they use merely as a means of support without parasitizing. Lichen consortium of Parmotrema autrosinense and several crustose lichens heavily colonized on the surface of P. mume in Suncheon, Jeonnam province in Korea. The lichen consortium on the surface of P. mume gave the affected trees a dull gray appearance and suppressed their normal growths. Severely affected twigs or branches resulted in the death when the lichen thalli were not rubbed off the barks of P. mume. Twigs or branches of P. mume were recovered from blight syndrome when the lichen thalli were rubbed off, The recovered twigs or branches became healthy and clean when 20 or thiophanate-methyl paste were treated on the barks of P. mume. This is the first report of lichen diseases on P. mume caused by colonization of consortium of several crustose lichens including P. autrosinense.
- Published
- 2007
237. Abstracts of Presentations at the 2007 Spring Meeting of the Korean Society of Mycology at the Chonnam National University, Gwangju, Korea, May 4
- Author
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Hye-Young Yu, Jeong-Ah Seo, Kap-Hoon Han, Sung-Hwan Yun, Yin-Won Lee, Kang-Hyeon Ka, Ji-Youn Chang, Sung-Ryul Ryu, Kab-Hee Yoon, Won-Chull Bak, Joon-Moh Park, Deuk-Sil Oh, Woo-Jae Cheon, Bong-Hun Lee, Yun-Hae Lee, Myoung-Jun Jang, Young-Cheol Ju, Woo-Sik Jo, Young-Hyun Rew, Sung-Guk Choi, Jae-Youl Uhm, Hoon Cho, Heung-Sun Sim, Byung-Wook Jo, Ying Wu, Cheol-Hee Choi, Woon-Seob Shin, Yu Lan Piao, Eun Jae Kim, Hye Yeon Mun, Kook Hwa Seo, Hyang Burm Lee, Heng Luo, Xinli Wei, Keon Seon Han, Young Jin Koh, Jae-Seoun Hur, Kwang-Choon Chang, In-Pyo Hong, Se-Kwon Kim, Jae-Ouk Shim, Ji-Yul Lee, Tae-Soo Lee, Min-Woong Lee, Wi Young Lee, Jin Kwon Ahn, Kang Hyeon Ka, Soo-Yong Song, Jeong-Hee Yun, Sang-Jun Kim, Ahn-Heum Eom, Eun-Hwa Lee, Suk Kim, Chang-Seok Lee, Yong-Seok Choi, Jae-Jin Kim, Young Woon Lim, Gyu-Hyeok Kim, Dae-Hyung Lee, Jae-Ho Kim, Kyo-Chul Koo, Dae-Hyoung Lee, Seung-Chan Jeong, Hyung-Eun Yoo, Jong-Soo Lee, Ahmed Imtiaj, Chandana Jayasinghe, Gun Woo Lee, Sang-Beom Kim, Yong Tae Jeong, Byung Keun Yang, Rezuanul Islam, Yu Sun Jung, Sang Min Kim, Chi Hyun Song, Sung-Hee Nam, Gyoo-Byung Sung, In-Mo Cheng, Hyeon Hur, Shun-Xing Guo, Young-Sang Choi, Hong Kyu Kim, Ka-Soon Lee, Dal-Soo Jhune, Jae-Mo Sung, Kyong-Cheol Ko, Sang Hyun Park, Hui Jeong Gwon, Yoshiyuki Kamio, Phuntip Poonpairoj, Yong-Sun Bahn, Young-Joon Ko, Joseph Heitman, In Ho Jeong, Mi Ra Park, Myoung Taek Lim, Kyu San Lee, Sung Je Cho, Gyoung Hee Kim, Sun Ho Shin, Hyun Su Park, Jong Sup Shin, Jong Young Yoon, Dong Heon Lee, Kyu Jin Yum, Myungkil Kim, Sun-Hwa Ryu, A-Young Lee, Bo-Young Kim, Kyung-Eun Lee, Young Hyun Kim, Hyoun-Su Lee, Joung Yoon Back, Young-Seok Kim, Man-Deuk Han, Ju-Yeon Sim, Kyung-Ha Yoon, Seung-Han Oh, Yoon Soo Han, Je-O Lee, Bhushan Shrestha, Sang-Kuk Han, Beom-Suk Kim, Gan-Joo Lee, Tae-Woong Kim, Ho-Gyoung Kim, Won-Ho Lee, Eun-Jung Ham, Sung-Su Park, Yong-Seon Yoo, Soo-Young Lee, Mi-Jeong Park, Young-Joon Choi, Seung-Beom Hong, Hyeon-Dong Shin, Jae-Gu Han, Sang Beom Kim, Geon Woo Lee, Tae Soo Lee, Mi Ja Shim, Chang-Won Lee, Hyun-Su Rho, Hyun Sook Lee, Min Woong Lee, U Youn Lee, Mi Sun Kim, Soon Ja Seok, Hack Sung Jung, Ji Yeon Oh, Sun Young Lee, Mun Il Ryoo, Ki Deok Kim, Hyo-Kyoung Won, Sung-Soon Kim, Dong-Gyu Kim, Song-Hee Lee, Hyeon-Su Ro, Hyun-Sook Lee, Narayan Chandra Paul, Won Ki Kim, Sung Kyoon Woo, Seung Hun Yu, So Hee Yun, Eun-Young Seo, Mi-Ran Lee, Chang Sun Kim, Won-Sik Kong, Kyeong-In Seo, Soon-Young Park, Kab-Yeul Jang, Young-Bok Yoo, Kwang-Ho Kim, Keun Kim, Quyvang Le, Shanliang Shi, Min Woo Hyun, Wook-Ha Park, Seung Yeol Son, Seong Hwan Kim, Kye Seung Jang, Wook Ha Park, Dong Youn Suh, Hyuk Woo Kwon, In Joung Back, Eun Sil Choi, Han Gyu Go, Chang Hyun You, Heon Dal Yoo, Yeo Hong Yun, Hyo Sun Jang, Young Bok Yoo, Won Sik Kong, Kab Yeul Jang, In Yeup Kim, Se Jong Oh, Chang Sung Jhune, Hyoun-Young Kim, Jong Hwa Kim, Yeong-Man Yu, Pil-Jae Maeng, Hee-Moon Park, Suhn-Kee Chae, Keon-Sang Chae, Kwang-Yeop Jahng, Dong-Min Han, Yoon-Gyo Lee, Jae-Chang Lee, Ki-Chul Chung, Kyung-ju Jung, Hyung-Guk Choi, In-Jin Park, and Duk-Soo Choi
- Subjects
geography ,Infectious Diseases ,geography.geographical_feature_category ,Sparassis crispa ,biology ,Mycology ,Spring (hydrology) ,Botany ,Gibberella ,biology.organism_classification ,Microbiology - Abstract
Functional Analyses of Three Gα and One Gβ Subunits in Gibberella zeaeComparison between Wild Strains of Pitoporus betulinus Collected from a Single TreeEcological Study of Sparassis crispa in Gwan...
- Published
- 2007
238. Effects of Lichen Colonization of Dirinaria applanata on the Death of Rhododendron schlippenbachii
- Author
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Jae-Seoun Hur, Young-Jin Koh, and Soon-Ok Oh
- Subjects
integumentary system ,biology ,Inoculation ,Differential staining ,Plant Science ,Fungus ,Rhododendron schlippenbachii ,biology.organism_classification ,Biochemistry ,Microbiology ,Thallus ,stomatognathic diseases ,stomatognathic system ,Algae ,Botany ,Colonization ,skin and connective tissue diseases ,Lichen ,Agronomy and Crop Science ,Molecular Biology ,Biotechnology - Abstract
Lichen thalli of Dirinaria applanata heavily colonized on the twigs of dead or dying Rhododendron trees in Solok island, Jeonnam province in Korea. Pathogenesis of the lichen on the trees was investigated to find out the possibility of lichen as a causal agent. Histological examination of the lichen colonized twigs was attempted with differential staining technique. Lichen-forming fungus colonized only on the surface of bark and there was no direct penetration of fungal hyphae into the plant tissues. Symbiotic algae of the lichen was also examined. The isolated algal cells were inoculated on artificially induced wounds of the healthy trees. Histological examination of the inoculated tissues showed that some algal cells were successfully colonized inside the tissues without any pathogenic symptoms, even 2 months later, The extract of the lichen thalli was also examined using 10% of DMSO solution. Treated tissues showed no pathogenic symptoms, even 4 weeks later. The results suggested that the lichen was not directly involved in the death of the trees.
- Published
- 2007
239. New Species and New Records of Buellia (Lichenized Ascomycetes) from Jeju Province, South Korea
- Author
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Xin Yu Wang, Dong Liu, Sergey Y. Kondratyuk, Jung Shin Park, Jae Seoun Hur, Soon Ok Oh, and László Lőkös
- Subjects
0301 basic medicine ,Ecology ,Species diversity ,030108 mycology & parasitology ,Biology ,Lichenized fungi ,biology.organism_classification ,Microbiology ,Floristics ,Thallus ,New species ,03 medical and health sciences ,Infectious Diseases ,Crustose lichen ,Botany ,Taxonomy (biology) ,Buellia ,Coastal area ,Crustose ,Lichen ,Research Article ,Taxonomy - Abstract
A new species and 2 new records of lichen genus Buellia were discovered from Chuja-do Island in Jeju Province during a recent floristic survey: B. chujana X. Y. Wang, S. Y. Kondr., L. Lőkos & J.-S. Hur sp. nov., B. halonia (Ach.) Tuck., and B. mamillana (Tuck.) W. A. Weber. The new species is characterized by a brown, areolate thallus, the presence of perlatolic acid, and a saxicolous habitat. Together with previously recorded species, 10 Buellia species were confirmed from Jeju-do Island. Among these species, 3 growing in the exposed rocky area contained xanthone (yellowish lichen thallus, UV + orange), indicating that production of xanthone in this genus might be a defense strategy against the harm of UV light. Although the genus Buellia has been thoroughly studied in Korea before, novel species have been discovered continuously, and large species diversity has been found in this crustose genus, even from a small rocky island. This study indicates that the coastal area harbors a vast number of crustose lichen species, and there is great potential to discover unknown lichens in the coastal rocky area in Korea.
- Published
- 2015
240. Inhibitory Activity of (+)-Usnic Acid against Non-Small Cell Lung Cancer Cell Motility
- Author
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Thanh Thi Nguyen, Hye Gwang Jeong, Min-Hye Jeong, Hyung-Ho Ha, Florin Crişan, Hangun Kim, Jae-Seoun Hur, Kyung Keun Kim, Kyung Hee Choi, Tae Cheon Jeong, Yi Yang, Young Hyun Yu, and Kwang Youl Lee
- Subjects
0301 basic medicine ,RHOA ,Lung Neoplasms ,Lichens ,Motility ,lcsh:Medicine ,RAC1 ,Antineoplastic Agents ,Real-Time Polymerase Chain Reaction ,Mass Spectrometry ,03 medical and health sciences ,chemistry.chemical_compound ,Inhibitory Concentration 50 ,0302 clinical medicine ,Cyclin D1 ,Cell Movement ,Carcinoma, Non-Small-Cell Lung ,Cell Line, Tumor ,Humans ,Neoplasm Invasiveness ,Neoplasm Metastasis ,lcsh:Science ,Chromatography, High Pressure Liquid ,Benzofurans ,Multidisciplinary ,biology ,Dose-Response Relationship, Drug ,Romania ,CD44 ,lcsh:R ,Usnic acid ,Molecular biology ,030104 developmental biology ,HEK293 Cells ,Biochemistry ,chemistry ,Cell culture ,030220 oncology & carcinogenesis ,Cancer cell ,biology.protein ,lcsh:Q ,Drug Screening Assays, Antitumor ,Chromatography, Liquid ,Research Article - Abstract
Lichens are symbiotic organisms that produce various unique chemicals that can be used for pharmaceutical purposes. With the aim of screening new anti-cancer agents that inhibit cancer cell motility, we tested the inhibitory activity of seven lichen species collected from the Romanian Carpathian Mountains against migration and invasion of human lung cancer cells and further investigated the molecular mechanisms underlying their anti-metastatic activity. Among them, Alectoria samentosa, Flavocetraria nivalis, Alectoria ochroleuca, and Usnea florida showed significant inhibitory activity against motility of human lung cancer cells. HPLC results showed that usnic acid is the main compound in these lichens, and (+)-usnic acid showed similar inhibitory activity that crude extract have. Mechanistically, beta-catenin-mediated TOPFLASH activity and KITENIN-mediated AP-1 activity were decreased by (+)-usnic acid treatment in a dose-dependent manner. The quantitative real-time PCR data showed that (+)-usnic acid decreased the mRNA level of CD44, Cyclin D1 and c-myc, which are the downstream target genes of both beta-catenin/LEF and c-jun/AP-1. Also, Rac1 and RhoA activities were decreased by treatment with (+)-usnic acid. Interestingly, higher inhibitory activity for cell invasion was observed when cells were treated with (+)-usnic acid and cetuximab. These results implied that (+)-usnic acid might have potential activity in inhibition of cancer cell metastasis, and (+)-usnic acid could be used for anti-cancer therapy with a distinct mechanisms of action.
- Published
- 2015
241. Lichen Secondary Metabolite, Physciosporin, Inhibits Lung Cancer Cell Motility
- Author
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Cheol Moon, Min-Hye Jeong, Eun Gene Sun, Thanh Thi Nguyen, Tru Van Nguyen, Kyung Keun Kim, Iris Pereira, Hyung-Ho Ha, Jayalal Udeni, So-Yeon Park, Jae-Seoun Hur, Young Hyun Yu, Hangun Kim, and Yi Yang
- Subjects
rho GTP-Binding Proteins ,Epithelial-Mesenchymal Transition ,Lung Neoplasms ,Lichens ,lcsh:Medicine ,Motility ,RAC1 ,Antineoplastic Agents ,Secondary metabolite ,Biology ,Kangai-1 Protein ,Metastasis ,Acetone ,Tetraspanin ,Cell Movement ,Cell Line, Tumor ,medicine ,Humans ,Neoplasm Invasiveness ,Epithelial–mesenchymal transition ,Neoplasm Metastasis ,lcsh:Science ,Multidisciplinary ,Plant Extracts ,lcsh:R ,Membrane Proteins ,medicine.disease ,Molecular biology ,Gene Expression Regulation, Neoplastic ,Transcription Factor AP-1 ,Metastasis Suppressor Gene ,Cell culture ,Immunology ,Oxepins ,lcsh:Q ,Carrier Proteins ,medicine.drug ,Research Article - Abstract
Lichens produce various unique chemicals that can be used for pharmaceutical purposes. To screen for novel lichen secondary metabolites showing inhibitory activity against lung cancer cell motility, we tested acetone extracts of 13 lichen samples collected in Chile. Physciosporin, isolated from Pseudocyphellaria coriacea (Hook f. & Taylor) D.J. Galloway & P. James, was identified as an effective compound and showed significant inhibitory activity in migration and invasion assays against human lung cancer cells. Physciosporin treatment reduced both protein and mRNA levels of N-cadherin with concomitant decreases in the levels of epithelial-mesenchymal transition markers such as snail and twist. Physciosporin also suppressed KITENIN (KAI1 C-terminal interacting tetraspanin)-mediated AP-1 activity in both the absence and presence of epidermal growth factor stimulation. Quantitative real-time PCR analysis showed that the expression of the metastasis suppressor gene, KAI1, was increased while that of the metastasis enhancer gene, KITENIN, was dramatically decreased by physciosporin. Particularly, the activity of 3'-untranslated region of KITENIN was decreased by physciosporin. Moreover, Cdc42 and Rac1 activities were decreased by physciosporin. These results demonstrated that the lichen secondary metabolite, physciosporin, inhibits lung cancer cell motility through novel mechanisms of action.
- Published
- 2015
242. Anticancer Activity of Lichen Metabolites and Their Mechanisms at the Molecular Level
- Author
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Kyung Keun Kim, Hangun Kim, and Jae-Seoun Hur
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stomatognathic diseases ,Programmed cell death ,Immune system ,Biochemistry ,Angiogenesis ,Tumor progression ,Signal transduction ,Cell cycle ,Biology ,Cytotoxicity ,Lichen - Abstract
As a result of symbiotic associations between mycobiont and photobiont, lichens can produce distinct and unique metabolites. Moreover, lichens are occasionally subjected to protect themselves from harsh environmental conditions during the growth. Therefore, lichen metabolites are expected to have various biological activities including antineoplastic action, for which it should suppress more than one of characteristics of the tumor progression. Here, we reviewed anticancer activity of lichen metabolites with molecular mechanisms by exerting cytotoxicity through regulation of cell cycle or induction of cell death, and by modulation of immune activity, angiogenesis, or energy metabolism. Alongside with these points, research will be expanded to yet unexplored areas by targeting cancer-specific signaling pathways.
- Published
- 2015
243. PAH (Polycyclic Aromatic Hydrocarbon) Degrading Endolichenic Bacteria Isolated from Chinese Desert Lichens Production of 2-Hydroxyalkanoates from Endolichenic Bacteria Using Xenobiotic Compounds as Sole Carbon Source
- Author
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Shamsun Nahar and Jae-Seoun Hur
- Published
- 2015
- Full Text
- View/download PDF
244. Antifungal Activity of Lichen-Forming Fungi Isolated from Korean and Chinese Lichen Species Against Plant Pathogenic Fungi
- Author
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Kwang Mi Lim, Hae Sook Jeon, Soon Ok Oh, Young Jin Koh, and Jae Seoun Hur
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Rhizoctonia solani ,Sclerotium ,biology ,Botany ,Ramalina ,Pertusaria ,Botryosphaeria dothidea ,Pythium ,Pestalotiopsis longiseta ,biology.organism_classification ,Agronomy and Crop Science ,Vulpicida - Abstract
Antifungal activity of Korean and Chinese lichen-forming fungi(LFF) was evaluated against plant pathogenic fungi of Botryosphaeria dothidea, Botrytis cinerea, Diaporthe actinidiae, Pestalotiopsis longiseta, Pythium sp., Rhizoctonia solani, and Sclerotium cepivorum. The LFF were isolated from Cladonia scabriuscula, Melanelia sp., Nephromopsis asahinae, Nephromopsis pallescens, Parmelia laevior, Pertusaria sp., Ramalina conduplicans, Ramalina sinensis, Ramalina sp., Umbilicaria proboscidea and Vulpicida sp. with discharged spore method. The isolates were deposited in the herbarium of Korean Lichen Research Institute(KoLRI) in Sunchon National University. The LFF of Melanelia sp., P. laevior, Pertusaria sp., R. conduplican and Ramalina sp. exhibited strong antifungal activity against all of the pathogenic fungi examined. Among them, LFF of P. laevior showed more than 90% of inhibition in fungal hyphae growth, compared with control. The results imply that LFF can be served as a promising bioresource to develop novel biofungicides. Mass cultivation of the LFF is now under progress in laboratory conditions for chemical identification of antifungal substances.
- Published
- 2006
245. Abstracts of Presentations at the 2006 Fall Meeting of the Korean Society of Mycology at the Seoul Kyoyuk Munhwa Hoekwan, Seoul, Korea, October 19–20
- Author
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Yong-Bo Lee, Young-Hee Na, Chae-Kyu Lim, In-Hoa Jang, Dong-Kyoung Jang, Seong-Eun Yun, Sin-Ae Park, Sung-Hee Lim, Hyeon-Na Cho, Mi-Kyeong Lee, Yue-Qin Xiao, Young Jin Koh, Jae-Seoun Hur, Kwang-Mi Lim, Yoshikazu Yamamoto, Young-Ah Jeon, Hyo-Jin Kim, Myoung-Sook Shin, Seung-Joo Go, Seung-Beom Hong, Duck-Hyun Cho, Jin Sung Lee, Hack Sung Jung, Jae-Gu Han, Hyeon-Dong Shin, Young-Joon Choi, Dae-Ho Kim, Young-ah Jeon, Seung-Ju Go, Jong-Kyu Lee, Kab-Yeul Jang, Sun-Gyu Choi, Won-Sik Kong, Young-Bok Yoo, Gyu-Hyun Kim, Jae-Mo Sung, Jin Hee Kim, Ji Sun Lee, Ji Young Seo, Hyun-Su Rho, Hyun Sook Lee, Min Woong Lee, U-Youn Lee, Tae Soo Lee, Min Woo Hyun, Wook Ha Park, Ji Hye Kim, Jin Su Kim, Seung Kyu Lee, Kyung Hee Kim, Seong Hwan Kim, Imtiaj Ahmed, Jayasinghe Chandana, Sang Beom Kim, Ji Yeon Oh, Sam Nyu Jee, Hojoung Lee, Mun Il Ryoo, Ki Deok Kim, Sang Hyeon Park, Ahn Heum Eom, Narayan Chandra Paul, Won Ki Kim, Sung Kyoon Woo, Yun Woo Jang, Myung Soo Park, Seung Hun Yu, Miyeong Sim, Ahn-Heum Eom, Eun-Hwa Lee, Suk Kim, Yoo Mee Lee, Eui Nam Kim, Gun Woo Lee, VU Van Hanh, Suk Il Hong, Keun Kim, Keum Chul Shin, Jong Kyu Lee, Jong-Gab Jung, Moo-Hee Mun, Sang-Cheol Jun, Kyu-Joong Kim, Sang-Woo Kim, Young-Jae Kim, Eun-Jung Kim, Ji-Seon Min, Youn-Su Lee, Seung-Bin Kim, Moo-Young Jung, Man-Su Yu, Dong-Jun Kim, Hak-Ro Youn, Sung-Man Han, Kye Seung Jang, Yeo Hong Yun, Hun Dal Yoo, Hyo Sun Jang, Chung Hwa Lee, Je-O Lee, Sang-Kuk Han, Eun-Jeong Ham, Bhushan Shrestha, Ho-Kyoung Kim, Tae-Woong Kim, Won-Ho Lee, Su-Young Lee, Cheol-Soon Ko, Beom-Suk Kim, Jinju Kim, Hyun-Sook Lee, Hyeon-Su Ro, Kwang-Joon Chang, Kang-Hyeon Ka, Hyeon Hur, In-Pyo Hong, Jae-Ouk Shim, Tae-Soo Lee, Ji-Yul Lee, Min-Woong Lee, Ji Hwan Yoon, Ji Eun Park, Hyun Seok Jo, Dong Yeon Suh, Seung Beom Hong, Seung Ju Ko, Heng Luo, Mei Rong Ren, Kwon-Il Seo, Soon-Ok Rim, Jin-Hyung Lee, In-Joong Lee, In-Koo Rhee, Jong-Guk Kim, Sun Hwa Ryu, A Young Lee, Hee Kyoung Sohn, Myung Kil Kim, Ja-Young Yoon, Yun-Hee Park, Hee-Moon Park, Joong-Keun Lee, Seung-Moon Park, Moon-Sik Yang, Tai-Boong Uhm, Dae-Hyuk Kim, In-Yeup Kim, Chang-Sung Jhune, Kwang-Ho Kim, Young Bok Yoo, Won Sik Kong, Kab Yeul Jang, In Yeup Kim, Se Jong Oh, Chang Sung Jhune, Hye Jin Kwon, Yong Jin Park, Kap-Hoon Han, Yeong-Man Yu, Hyoun-Young Kim, Mi-Hee Choi, Pil-Jae Maeng, Jong Hwa Kim, Suhn-Kee Chae, Keon-Sang Chae, Kwang-Yeop Jahng, Dong-Min Han, Yaya Rukayadi, Jae-Kwan Hwang, Dong-Gyu Kim, Sung-Soon Kim, Jun-Oh Choi, Hyo-kyoung Won, Ji-Young Bae, Jung-Ah Choi, Sunhwa Moon, Jung-Bin Park, Eun-Hee Yang, Young-Hun Jin, Mi-Sun Lee, Mu-Seok Seo, Gun-A Kim, Seok-Tae Kwon, Young-Kyung Lee, Bum-Soo Hahn, Gi-Yong Kim, Beong-Yeol Sung, Jong-Bum Kim, Joo-Sung Yang, Seung Ho Lee, Mi Ja Shim, Jae Ouk Shim, Yoon Hee Lee, Jung Sun Lee, Hyun Guell Kim, Kyu Chan Cho, Yong Il Park, Wi Young Lee, Jin Kwon Ahn, Youngki Park, Kang Hyeon Ka, Jeong Weon Yoon, Sung Woo Choi, Hee Kuk Park, Won Jin Yu, Sung Pil Lee, Ae Kyung Juen, Won Woo Kim, Sang Mong Lee, Namsook Park, Eunju Park, Byung Rae Jin, Hong Kyu Kim, Yong Gyun Kim, Gwan Seuk Seo, Se Hyun Oh, Hong Gi Kim, Nam Gyu Kim, Sung Woo Kang, and Jung Bae Kim
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Myelochroa ,Euphoriomyces ,Opuntiella ,Infectious Diseases ,Genus ,Anthropology ,Mycology ,Laboulbeniales ,Biology ,biology.organism_classification ,Microbiology - Abstract
Notes on Three Species of the Genus Euphoriomyces (Laboulbeniales) from KoreaTaxonomic Studies on Myelochroa from KoreaMolecular Analysis of Korean Anzia opuntiella (Lichenized Ascomycota) Based on...
- Published
- 2006
246. Abstracts of Presentations at the 2006 Spring Meeting of the Korean Society of Mycology at the Seoul National University, Seoul, Korea, May 12
- Author
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Hyang Burm Lee, Jin Cheol Kim, Hack Sung Jung, Kim Myungkil, Ruy Sun Hwa, Bak Wonchull, Park Hyun, Ka Kang Hyeon, Sohn Hee Kyung, Chang-Duck Koo, Seung-Gyu Lee, Oh Ji Yeon, Lee Hojoung, Ryoo Mun Il, Kim Ki Deok, Sol Yun, Yang-Sup Kim, Kang-Hyo Lee, Soon-Ja Seok, Tae-Wan Kim, Kyong-Hee Min, Se Jeong Jang, Seung Hwan Heo, Sung Woo Kang, Chang Soon Jang, Hong Gi Kim, Jae-Gu Han, Hyeon-Dong Shin, Choi Young-Joon, Hong Seung-Beom, Shin Hyeon-Dong, Kim Dong-Gyu, Kim Sung-Soon, Choi Jun-Oh, Won Hyo-Kyoung, Lee Hyun-Sook, Wi Young Lee, Jin Kwon Ahn, Kang Hyeon Ka, Hyun Park, Youngki Park, Sang-Kuk Han, Wonho Lee, Sungkeun Choi, Je-O Lee, Beonsuk Kim, Jong-Ho Choi, Jae-Mo Sung, Won-Ho Lee, Sung-Keun Choi, Bum-Suk Kim, Eun-Jung Ham, Ji Hee Kim, In-Young Ahn, Soon Gyu Hong, Mikhail Andreev, Kwang-Mi Lim, Mi Jin Oh, Young Jin Koh, Jae-Seoun Hur, Yue-Qin Xiao, Li-Song Wang, Pei-Gui Liu, Soon-ok Oh, Heng Luo, Misun Kim, Kyung Mo Kim, Lee Yoon Hee, Lee Jung Sun, Cho Kyu Chan, Park Yong Il, Kim Hong Kyu, Kim Yong Gyun, Lee Ka Soon, Seo Gwan Seuk, Kim Hong Gi, Kim Dong Won, Lee Seung Kyu, Kim Jong Jin, Kim Kyung Hee, Won-Sik Kong, In-Yeup Kim, Chang-Sung Jhune, Young-Bok Yoo, Gyu-Hyun Kim, Kwang-Ho Kim, Young Bok Yoo, In Yeup Kim, Won Sik Kong, Se Jong Oh, Kab Yeul Jang, Chang Sung Jhune, Soo-Gyeong Kim, Deuk-Kwon Cho, Dong-Soon Bae, Hyun-Min Gang, Kab-Yeol Jang, Kim Sang Woo, Kim Jinju, Lee Hyun Sook, Ro Hyeon-Su, Jae-ouk Shim, Kwang-choon Chang, Youn-Su Lee, U-Youn Lee, Tae-Soo Lee, Min-Woong Lee, Yoon-Gyo Lee, Jae-won Ryu, Ki-Chul Chung, Ryu Jae-San, Min-Keun Kim, Nak-Ku Kim, Jin-Hyeuk Kwon, Ki Kwan Park, Chi-wong Rho, Hyun-Su Rho, Hyun-Sook Lee, Y. J. Kim, S. W. Kim, E. J. Kim, J. S. Min, D. J. Kim, H. R. Youn, S. M. Han, Y. H. Park, Youn Su Lee, Jong-Chun Cheong, Seung-Hwan Kim, Jung-Sik Park, Kab-Yeal Chang, Jae-Cheon Na, Mi-Yeong Sim, Ahn-Heum Eom, Sang-Hyeon Park, Yoo-Mee Lee, Jeong Hyeon-Suk, Lee Eun-Wha, Kim Suk, Eom Ahn-Heum, Jun-Ho Kim, Ji Hwan Yoon, Hyun Seok Cho, Dong Youn Suh, Seung Bum Hong, Seung Ju Ko, Seong-Hwan Kim, Young Jae Jeon, Ji Eun Park, Ji Hye Kim, Yong Ju Jin, Seong Hwan Kim, Ahmed Imtiaj, Shahidul Alam, Rehana Parvin, Ahsanur Rahman, Sang-Beom Kim, and Min Woong Lee
- Subjects
geography ,Infectious Diseases ,geography.geographical_feature_category ,Mycology ,Spring (hydrology) ,Library science ,Biology ,Microbiology - Published
- 2006
247. First Report of Anthracnose Caused by Colletotrichum acutatum on Begonia (Begonia semperflorens Link.) Nurseries
- Author
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Jae Seoun Hur, Gyung Mi Min, Heung Tae Kim, Hee Jin Park, Woo Bong Choi, Gyoung Hee Kim, Beum Kwan Kang, Young Jin Koh, and Jong Kyu Park
- Subjects
biology ,Spots ,Inoculation ,fungi ,food and beverages ,biology.organism_classification ,chemistry.chemical_compound ,Colletotrichum acutatum ,chemistry ,Azoxystrobin ,Begonia ,Botany ,Potato dextrose agar ,Agronomy and Crop Science ,Mycelium ,Tebuconazole - Abstract
Anthracnose severely occurred on begonia (Begonia semperflorens Link.) nurseries in Gyeongju, Gyeongbuk in July, 2004. More than of begonia seedlings were diseased in the greenhouse surveyed and diseased leaves per plant were in average. Yellowish spots occurred on the leaves of begonia as initial symptoms, and they coalesced irregularly to form large brown pleomorphic lesions. Severely infected leaves were defoliated, resulting in abnormal growth of the entire plant. Colletotrichum sp. was repeatedly isolated from the diseased plants and was identified as Colletotrichum acutatum on the basis of the mycological characteristics on potato dextrose agar and RAPD analysis. Pathogenicity of the fungus was also confirmed by artificial inoculation on healthy plants. The optimum temperature for mycelial growth of C. acutatum was around . The fungus was sensitive to azoxystrobin, bitertanol, diethofencarb-carbendazim, difenoconazole and tebuconazole. This is the first report on the anthracnose of begonia caused by C. acutatum in Korea.
- Published
- 2006
248. Candelaria asiatica, an Ignored New Species from South Korea.
- Author
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Dong Liu and Jae-Seoun Hur
- Subjects
- *
LICHEN classification , *MOLECULAR phylogeny , *NUCLEOTIDE sequencing , *THIN layer chromatography - Abstract
The genus Candelaria is characterized by a micro-foliose to micro-fruticose thallus and contains eight species, two of which were reported in South Korea. During the excursion of a Korean lichen flora investigation, some suspected Candelaria concolor specimens were collected, and their morphological, chemical, molecular phylogenetic, and geographic analyses were conducted. The samples eventually proved to be a new species, Candelaria asiatica, which can be recognized by a small, yellow lobate thallus with a pulverulent surface, and a fragile lobe margin with blastidia or phyllidia-like lobules. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
249. Abstracts of Presentations at the 2005 Fall Meeting of the Korean Society of Mycology at Seoul Kyoyuk Munhwa Hoekwan, Seoul, Korea, October 13–14
- Author
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Kye Seung Jang, Hee Jun Kang, Wook Ha Park, Sua Pyo, Seong Hwan Kim, Jin Sung Lee, Hack Sung Jung, Sun-Gyu Choi, Min-Goo Kim, Hyun-Min Kang, Won-Sik Kong, Young-Bok Yoo, Kab-Yeul Jang, Gyu-Hyun Kim, Soon-Ok Oh, Kwang-Mi Lim, Young-Jin Koh, Jae-Seoun Hur, Hosung Chung, Jee Hee Kim, Young Jin Koh, Myung Soo Pard, Geon Sik Seo, Kyung Sook Bae, Seung Hun Yu, Boo Hee Lee, Joo Chan Lee, Myung Soo Park, Dong-Soon Bae, Jung-Hwan Cha, Hyuk Gu Park, Han Gyu Ko, Jae Mo Sung, Won Mok Park, Yong-Bo Lee, Chae-Kyu Lim, Dong-Kyoung Jang, In-Ha Jung, Sang-Hee Park, In-Hwa Jang, Sung-Eun Yun, Hansu Park, Young Hyun Ryu, Woo Sik Jo, Sung Guk Choi, Jong Guk Kim, Jae Tak Yoon, Jung Sik Park, Su Young Kim, Hee-Gon Choi, Mira Jin, Kwang-Yeop Jahng, Kyung Seok Park, Jong-Chun Cheong, Chang-Sung Jhune, Jeong-Sik Park, Young-Ju Oh, Soo-Yeon Choi, Min-Sook Lee, Kum-Ju Park, Jung-il Kang, Hyo-Cheol Ha, Hyun-Su Kim, Byng-Keun Yang, Yong-Tae Jeong, Guk-Nam Kim, Hun Jeong, Chi-Hyun Song, Jae Won Lee, Soo Min Lee, Ji Yoon Lee, In Gyu Choi, Jae-Seong Hur, Wan Gyu Kim, Soon Ja Seok, Kang Hyo Lee, Hang Yun Weon, Yang Sup Kim, Sung-Keun Choi, Won-Ho Lee, Je-O Yi, Bum-Suck Kim, Jae-Mo Sung, Hae-Sook Jeon, Sung-Tae Yee, Ho Sung Chung, Min Woo Hyun, Han Byul Jang, Ji Hwan Yun, Sang Do Cha, Yeo Hong Yun, Seoung Ryul Son, Kyung-Ha Yoon, Hyoun-Su Lee, Sung-Keun Chioi, Jeong-Hoon Lee, In-Yeup Kim, Young-Hyun Lee, Hye-Kyung Jung, Yong Il Kim, Kwang Choon Chang, Youn Su Lee, Jae Ouk Shim, U Youn Lee, Tae Soo Lee, Min Woong Lee, Ki-Wook Kweon, Kwang-Ho Kim, Hee-Kyoung Kim, Sun-Hee Lee, Sae-Yeon Hong, Yin-Won Lee, Sung-Hwan Yun, Ki-Wook Kwon, Hyun-Dong Sin, Suk-Yi Woo, Yun-Hee Park, Hee-Moon Park, Joong Ho Joh, Nam Kuk Kim, Jong Hyun Lim, Min Jin Song, Won Sik Kong, Young Bok Yoo, Chang Soo Lee, Keum Chul Shin, Nam Kyu Kim, Byung Ju Cho, Jong Kyu Lee, Byung Ju Choi, Jaikoo Lee, Sang-Hyeon Park, Ahn-Heum Eom, Jin-Hyeuk Kwon, Seung-Beom Hong, Y. S. Lee, J. Y. Song, N. J. Jun, H. G. Kim, Kang-Hyo Lee, Soon-ja Seok, Gu-Bok Jung, Jong-Cheon Cheong, Soo-Muk Cho, Hyeon-Suk Jeong, Bong-Hyung Lee, Yoo-Mi Lee, In-Yong Kim, Jin-A Kim, YoungHak Park, KwangJae Lee, WonHo Lee, Kyung-Hee Kim, Myoung Yong Shim, Young Jae Jeon, Yun Hee Oh, Sang Beom Kim, Kyung Rim Lee, U Yoon Lee, In Pyo Hong, Sung Hee Nam, Gyoo Byung Sung, Hyun Bok Kim, I Yeon Jung, Pil Don Kang, Hyeon Hur, Min-Woong Lee, Jin-Hee Kim, Jung-Bo Sim, Jin Won Kim, and Se-Chul Chun
- Subjects
Infectious Diseases ,Microbiology - Published
- 2005
250. Abstracts of Presentations at the 2005 Spring Meeting of the Korean Society of Mycology at The University of Seoul, Seoul, Korea, May 13
- Author
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Hyun Park, Bong Hoon Lee, Jin Sung Lee, Hack Sung Jung, Young Jin Koh, Gil-Ho Shin, Gyoung Hee Kim, Jong Kyu Park, Jae-Seoun Hur, Soon-Ok Oh, Hyang Burm Lee, Kyoung Mo Kim, Hae Young Kim, Gyung Ja Choi, Kyoung Soo Jang, He Kyoung Lim, Kwang Yun Cho, Hyung-Ki Lee, Jin-Cheol Kim, Yong-Bo Lee, Young-Hee Na, Chae-Kyu Lim, Byong-Soo Heo, Kang-Soo Lee, Yang-Soo Lee, Hyun Ju Lee, Byung Re Min, Jung-Suk Sung, Yeong-Il Kim, Jin-A Kim, Yoo Mee Lee, Ahn-Heum Eom, Hyeon-Suk Jeong, Sang-Hyun Park, Keum Chul Shin, Nam Kyu Kim, Byung Ju Cho, Sang Yong Lee, Jong Kyu Lee, In-Pyo Hong, Sung-Hee Nam, I-Yeon Jung, Gyoo-Byung Sung, Pil-Don Kang, Seok-Woo Kang, Hyeon Hur, Min-Woong Lee, Shun-Xing Guo, Hyung-Eun Yu, Dae-Hyoung Lee, Seung-Chan Jeong, Jong-Soo Lee, In-Hye Park, Hyo-Cheol Ha, Kum Ju Park, Tae-Suck Kim, Hyun Su Kim, Jin-Hyeuk Kwon, Hyeong-Jin Jee, Yong Tae Jeong, Byung Keun Yang, Sang Chul Jeong, Young Ah Gu, Guk Nam Kim, Hun Jeong, Chi Hyun Song, Hae-Sook Jeon, Kwang-Mi Lim, Hyung-Yeel Kahng, Yue-Qin Xiao, Li-Song Wang, Jeong-Ok Lee, Yong Il Kim, Kwang Choon Chang, Youn Su Lee, Jae Ouk Shim, U Youn Lee, Tae Soo Lee, Min Woong Lee, Fun Hee Bae, Su Bin Min, Cheong Ha Park, Yeong Sub Park, Myeong Hyeon Nam, Nam Gyu Kim, Suck Kee Jung, Sung Joon Yoo, Hong Gi Kim, Mi Sun Ko, Soh Young Oh, Myung Soo Park, Seung Hun Yu, Kang-Hyo Lee, Hang-Yeon Weon, Soon-Ja Seok, Soon-Ik Kwon, Yang-Sup Kim, Jae-Mo Sung, Wan-Gyu Kim, Hye Jin Kwon, Won-Sik Kong, Han Gyu Ko, Hyuk Gu Park, Seong Hwan Kim, Jae Mo Sung, Won Mok Park, Min Woo Hyun, Bhushan Shrestha, Sang-Kuk Han, Kwon-Sang Yoon, Kwang-Yeol Jeong, Won-Ho Lee, Sung-Keun Choi, Je-O Lee, Jung-Hoon Lee, Soo-Yong Lee, Pham Thi Vuong, Luong Van Ha, Kwang-Yeo Jeong, In-Yeup Kim, Young-Jin Kim, Young-Hyun Lee, Gwang-Reul Jung, Wi Young Lee, Youngki Park, Jin Kwon Ahn, So Young Park, Young-Joon Choi, Seung-Beom Hong, Hyeon-Dong Shin, Jae-Jin Kim, Colette Breuil, Gyu-Hyeok Kim, Jong-In Choi, Tai-Moon Ha, Jeong-Hyun Chi, Young-Cheol Ju, Sol Yun, Tae-Wan Kim, Kyong-Hee Min, Si Jung Ha, Jun-Oh Choi, Sung-Soon Kim, Hyeon-Su Ro, Hyun-Sook Lee, Jae San Ryu, Tae Su Lee, Kyung-Ju Jung, Duck-Soo Choi, Hyeung-Kuk Choi, Jung-Sik Park, and Ki-Chul Chung
- Subjects
Betula costata ,geography ,geography.geographical_feature_category ,biology ,biology.organism_classification ,Isolation (microbiology) ,Microbiology ,Infectious Diseases ,Mycology ,Botany ,Spring (hydrology) ,Inonotus obliquus ,Host plants ,Pestalotiopsis - Abstract
Isolation of Inonotus obliquus from Betula costata in KoreaTaxonomic Study on Some Unrecorded Taxa of Korean AphyllophoralesSurveys of Host Plants of Pestalotiopsis spp. in KoreaBacillus subtilis B...
- Published
- 2005
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