• Title/Summary/Keyword: Curvularia

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

  • Jeon, Sun Jeong;Nguyen, Thi Thuong Thuong;Lee, Hyang Burm
    • Mycobiology
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    • v.43 no.3
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    • pp.210-217
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    • 2015
  • A seed-borne fungus, Curvularia sp. EML-KWD01, was isolated from an indigenous wheat seed by standard blotter method. This fungus was characterized based on the morphological characteristics and molecular phylogenetic analysis. Phylogenetic status of the fungus was determined using sequences of three loci: rDNA internal transcribed spacer, large ribosomal subunit, and glyceraldehyde 3-phosphate dehydrogenase gene. Multi loci sequencing analysis revealed that this fungus was Curvularia spicifera within Curvularia group 2 of family Pleosporaceae.

Keratomycosis in a Pet Rabbit Due to Curvularia lunata (애완용 토끼에 있어서 Curvularia lunata에 의한 각막진균증 1예)

  • Pall Mahendra;Lee Chang-woo
    • Journal of Veterinary Clinics
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    • v.12 no.1
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    • pp.849-852
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    • 1995
  • 데마슘과 사상균의 일종인 Curvularia lunata가 식물파편으로 오염된 흙에 의해 눈에 외상을 입은 젊은 수토끼(Orytolaggus cunuculis)에서 각막궤양을 일으킨 것으로 밝혀졌다. 이 토끼는 직경 1.5 mm의 각막궤양, 각막부종, 전방축농, 눈물 등을 나타내었다. 각막 소파시료의 KOH 표본과 진균배지에서의 분리를 통해 진균이 확인되었다. 눈의 외상은 진균성각막염의 발생소인이었다. 토끼장의 흙은 Curvularia lunata의 집락을 많이 형성하였으며, 이것이 감염원으로 추정되었다. 이것은 애완용 토끼에서 Curvularia lunata에 의한 안진균증의 최초의 보고인 것으로 판단된다. 외상의 병력이 있는 동물임상의 다양한 상황에서 Curvularia lunata의 병인론적 역할이 연구되어야 함을 강조하였다.

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Some Undescribed Cladosporium, Alternaria, Curvularia and Eurotium repens in Korea (한국산 미기록 Cladosporium, Alternaria, Curvularia와 Eurotium repens에 관한 연구)

  • Min, Kyung-Hee
    • The Korean Journal of Mycology
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    • v.14 no.1
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    • pp.1-8
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    • 1986
  • The following ten species collected from the air of Seoul City and the soils in Korea are reported as undescribed to Korean fungal flora: Cladosporium sphaerospermum, C. herbarum, C. colocasiae, Alternaria chlamydospora, A. cheiranthi, A. citri, Curvularia ovoidea, C. inaequalis, C. affinis, and Eurotium repens.

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First Report of Curvularia Leaf Blight Caused by Curvularia trifolii on Creeping Bentgrass in Korea (Curvularia trifolii에 의한 크리핑벤트그래스 잎마름병 발생)

  • Sung, Chang-Hyun;Koo, Jun-Hak;Kim, Jung-Ho;Yoon, Jung-Ho;Lee, Jung-Han;Shim, Kyu-Yul;Kwak, Youn-Sig;Chang, Seog-Won
    • Weed & Turfgrass Science
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    • v.5 no.2
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    • pp.101-104
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    • 2016
  • Curvularia leaf blight of creeping bentgrass (Agrostis stolonifera) putting green by caused Curvularia trifolii was observed in Hapcheon, Korea. In July to September 2014, curvularia leaf blight developed on leaf blades of creeping bentgrass as small water-soaked lesions that subsequently turned into dark-colored, necrotic spots. The spots were expanded and became gray, grayish-brown, or light brown, circular to oblong lesions with purple to dark brown borders that often were surrounded by a yellow halo. The necrotic lesions coalesced, became irregular in shape and caused tip or complete blighting of the leaves. Blighted leaf blades appeared grayish-white to tan. The fungus was identified by morphological characters and 16S rDNA sequencing as C. trifolii. Conidia of the pathogen were short, with predominantly 3-septa, straight or often curved, with end cells frequently paler than intermediate cells. Size of the 3-septate conidia in culture are $26{\sim}28{\times}11{\sim}12{\mu}m$. Pathogenicity of the fungus was proved by artificial inoculation on the host. This is the first report of C. trifolii causing leaf blight on creeping bentgrass in Korea.

Identification of Curvularia spp. Isolated from Gramineous Plants in Korea (화본과식물에서 분리한 Curvularia spp.의 동정)

  • Yi, Jeong-Hye;Kim, Jin-Won;Lee, Du-Hyung;Shim, Gyu-Yul
    • The Korean Journal of Mycology
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    • v.30 no.1
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    • pp.56-60
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    • 2002
  • Sixteen Curvularia isolates were collected from leaf spots and blights on gramineous plants of field crops, grass pasture plants, turfgrasses and wild weeds in Korea in 1998. These isolates were identified as C. cymbopogonis, C. inaequalis, C. intermedia, C. lunata, C. lunata var. aeria, C. ovoidea, C. pallescens and C. senegalensis based on the mycological characteristics. Of these, C. cymbopogonis, C. lunata var. aeria, C. ovoidea and C. senegalensis were recorded for the first time in Korea.

Pezizomycotina (Ascomycota) Fungi Isolated from Freshwater Environments of Korea: Cladorrhinum australe, Curvularia muehlenbeckiae, Curvularia pseudobrachyspora, and Diaporthe longicolla

  • Nam, Bora;Lee, Jae Sung;Lee, Hyang Burm;Choi, Young-Joon
    • The Korean Journal of Mycology
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    • v.48 no.1
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    • pp.29-38
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    • 2020
  • Fungi are ubiquitous and indispensable components of nearly all ecosystems on earth, including freshwater environments. A survey of fungal diversity in freshwater environments of Korea led to the identification of four unrecorded Pezizomycotina (Ascomycota) species in 2016 and 2017, based on morphology and molecular phylogeny; these included Cladorrhinum australe, Curvularia muehlenbeckiae, Curvularia pseudobrachyspora (Dothideomycetes), and Diaporthe longicolla (Sordariomycetes).

Antifungal Activity of an Alkaloid Allosecurinine against Some Fungi

  • Singh, A.K.;Pandey, M.B.;Singh, U.P.
    • Mycobiology
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    • v.35 no.2
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    • pp.62-64
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    • 2007
  • An allosecurinine alkaloid was assayed against spore germination of some saprophytic and pathogenic fungi e.g., Alternaria alternata, A. solani, A. brassicicola, A. brassicae, Curvularia lunata, C. pallescens, C. maculans, Curvularia species, Colletotrichum species, C. musae, C. gloeosporioides, Erysiphe pisi, Fusarium udum, Helminthosporium echinoclova, H. pennisetti, H. spiciferum, and Heterosporium sp. It inhibited mild spore germination of all the fungi tested. Curvularia lunata, Curvularia sp., Collectotrichum sp., C. musae and Heterosporium sp. were most sensitive as complete inhibition of spore germination was observed at very low concentrations.

Potential of Curvularia sp. DBB2003 as mycoherbicide for monochoria.

  • Kim, Jae-Su;Lee, Han-Young;Jang, Seung-Sik;Chung, Bong-Jin
    • Proceedings of the Korean Society of Plant Pathology Conference
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    • 2003.10a
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    • pp.111-111
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    • 2003
  • Several fungal isolates were isolated from diseased monochoria(Monochoria vaginalis, weed of paddy field), which has an resistance to sulfonyl urea(S.U.) herbicide, and were evaluated in the laboratory and greenhouse as potential mycoherbicide. Eight fungi, Alternaria sp., Colletotrichum sp., Curvularia sp., Paenicillium sp and etc. were observed in the isolates. Pathogenicity testing were done on the monochorias in the greenhouse. Monochorias were inoculated with suspensions containing conidia of each isolate at the rates of 1.0 ${\times}$ 10$\^$5/ conidia/ml and 0.1% Tween 80 with hand-gun sprayer. Curvularia sp. and an unidentified fungal isolate caused 90-95% mortality on the monochorias 15∼20 days after inoculation. However the other isolates induced slight symptom of disease on the monochorias. In the early stage of disease development sun-burn appearance was shown at the infected site and the last infected leaves and stems were withered to death. Subsequently the pathogenicity on the rice was evaluated with above two effective isolates. From the test an unidentified isolate showed pathogenicity on the rice but Curvularia sp., named as DBB2003, didn't. Now the mass production and formulation using Curvularia sp. DBB2003 are in progress and the field test will be followed. Combination product with Curvularia sp. DBB2003 and chemical herbicide will be more effect to control the monochoria resisted on S.U. herbicide and need to be further tested.

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Antifungal Activity of 4',7-Dimethoxyisoflavone Against Some Fungi

  • Pandey, M.K.;Pandey, R.;Singh, V.P.;Pandey, V.B.;Singh, U.P.
    • Mycobiology
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    • v.30 no.1
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    • pp.55-56
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    • 2002
  • The 4',7-dimethoxyisoflavone was isolated from the leaves of Albizzia lebbeck for the first time. This flavonoid showed antifungal activity against some plant pathogenic fungi tested in vitro, e.g., Alternaria melongenae, A. brassicicola, A. brassicae, Curvularia maculans, C. pallescens, C. lunata, Curvularia species, Colletotrichum species, Helminthosporium penniseti and H. speciferum. The sensitivity of different fungi to this chemical varied considerably. A. brassicae was most sensitive as complete inhibition of germination was observed in all the concentrations(100 to 1000 ppm) of the chemical. Similar effect on H. speciferum and Curvularia species was also recorded at 500 ppm, whereas H. penniseti did not germinate at 250 ppm. A. melongenae and A. brassicicola also did not germinate at 1000 ppm while 750 ppm was inhibitory to C. lunata and C. maculans. Germination in almost all fungi was significantly inhibited at each concentration in comparison to control except Curvularia sp. and H. speciferum. Use of 4',7-dimethoxyisoflavone to control some plant diseases under field conditions has been suggested.

The Taxonomical Studies of Curvularia Blight of Turf (Arostis canina L.) in Korea (한국(韓國)에서의 Curvularia에 의한 잔디의 입고병(立枯病)에 관(關)한 분류학적(分類學的) 연구(硏究))

  • Kim, Jong-Hi;Lee, Min-Woong
    • The Korean Journal of Mycology
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    • v.1 no.2
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    • pp.31-33
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    • 1973
  • On September 1972, a blight disease of turf (Arostis canina L.)was found in a golf link in Seoul Country Club at Seoul, Korea. Yellow circular patches of 15-20cm in diameter were observed and spreaded irregulary to collapse of themselves. The roots of the diseased plants were dark in color and were in a final state of decay. We isolated Curvularia sp. from the diseased plants and investigated the morphological and cultural characters. Its characters as follows: Mycelia septate, branched, hyaline or yellowish brown colored. Conidiophores septate, thin brown, unbranched. $65-270{\times}3.5-5{\mu}$. Conidia clustered at the tips of conidiophores, boat form or slightly curved with 1-5 septa, brown; both end cells hyaline; the third cell much larger than the others. $26.1-33.3{\times}9.5-10.1{\mu}$ (4 cell's conidium). The pathogenicity of the fungus to host plant was confirmed by soil inoculation method. We classified the fungus according to Gilman's method as a species Curvularia geniculata (Tracy and Earle) Boedjin.

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