• 제목/요약/키워드: Curvularia species

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

  • 민경희
    • 한국균학회지
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    • 제14권1호
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    • pp.1-8
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    • 1986
  • 한국의 토양과 서울 시내의 공기로부터 진균류를 분리하였스며 그 중에서 다음 10군을 미기록 종으로 보고한다 : 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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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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    • 제43권3호
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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.

Antifungal Activity of an Alkaloid Allosecurinine against Some Fungi

  • Singh, A.K.;Pandey, M.B.;Singh, U.P.
    • Mycobiology
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    • 제35권2호
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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.

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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    • 제30권1호
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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.

Studies on Sclerotium Formation in Curvularia Species

  • Singh, U.P.;Singh, S.K.;Sugawara, Koya;Srivastava, J.S.;Sarma, B.K.;Prithiviraj, B.
    • Mycobiology
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    • 제29권3호
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    • pp.154-159
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    • 2001
  • Natural sclerotium formation in two species of Curvularia was observed. The sclerotia were spherical to elongated. The scanning electron microscopical observations of sclerotia revealed that the sclerotia were of two distinct layers of cells, outer loosely woven hyphae and inner contact layer of cells. Different lights, viz. red, blue, green, fluorescent or addition of culture filtrate of Sclerotium rolfsii in the medium did not affect sclerotium formation.

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Effect of Tetrahydropalmatine, an Alkaloid on Spore Germination of Some Fungi

  • Maurya, S.;Srivastava, J.S.;Jha, R.N.;Panday, V.B.;Singh, U.P.
    • Mycobiology
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    • 제29권3호
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    • pp.142-144
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    • 2001
  • The tetrahydropahnatine alkaloid was assayed against spore germination of some saprophytic and pathogenic fungi e.g., Alternaria solani, A. brassicicola, A. brassicae, A. alternata, Erysiphe pisi, Curvularia lunata, C. pallescens, C. maculans, Curvularia species, Colletotrichum species, C. musae, Helminthosporium echinoclova, H. pennisetti, H. spiciferum, and Heterosporium sp. It inhibite spore germination of all the fungi tested. Colletotrichum spp. Curvularia lunata, Helminthosporium spiciferum and Heterosporium sp. were most sensitive as complete inhibition of spore germination was observed at very low concentration(200 ppm).

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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
    • 한국균학회지
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    • 제48권1호
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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).

The Effect of Seed-borne Mycoflora from Sorghum and Foxtail Millet Seeds on Germination and Disease Transmission

  • Yago, Jonar I.;Roh, Jae-Hwan;Bae, Soon-Do;Yoon, Young-Nam;Kim, Hyun-Ju;Nam, Min-Hee
    • Mycobiology
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    • 제39권3호
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    • pp.206-218
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    • 2011
  • The seed-borne mycoflora of sorghum and foxtail millet collected from different growing areas in South Korea were isolated and taxonomically identified using dry inspection, standard blotter and the agar plate method. We investigated the in vitro and in vitro germination rates of disinfected and non-disinfected seeds of sorghum and foxtail millet using sterilized and unsterilized soil. The percent recovery of seed-borne mycoflora from the seed components of sorghum and foxtail millet seeds was determined and an infection experiment using the dominant species was evaluated for seedling emergence and mortality. A higher number of seed-borne fungi was observed in sorghum compared to that of foxtail millet. Eighteen fungal genera with 34 fungal species were identified from the seeds of sorghum and 13 genera with 22 species were identified from the seeds of foxtail millet. Five dominant species such as Alternaria alternata, Aspergillus flavus, Curvularia lunata, Fusarium moniliforme and Phoma sp. were recorded as seed-borne mycoflora in sorghum and 4 dominant species (Alternaria alternata, Aspergillus flavus, Curvularia lunata, Fusarium moniliforme) were observed in foxtail millet. The in vitro and in vitro germination rates were higher using disinfected seeds and sterilized soil. More seed-borne fungi were recovered from the pericarp compared to the endosperm and seed embryo. The percent recovery of seed-borne fungi ranged from 2.22% to 60.0%, and Alternaria alternata, Curvularia lunata and 4 species of Fusarium were isolated from the endosperm and embryo of sorghum and foxtail millet. Inoculation of the dominant seed-borne fungi showed considerable mortality of seedlings. All the transmitted seed-borne fungi might well be a primary source of infection of sorghum and foxtail millet crops.

Effect of Ent-norsecurinine, an Alkaloid, on Spore Germination of Some Fungi

  • Goel, Mitul;Maurya, S.;Pandey, V.B.;Singh, V.P.;Singh, A.K.;Singh, U.P.
    • Mycobiology
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    • 제30권4호
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    • pp.225-227
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    • 2002
  • The inhibitory activity of ent-norsecurinine alkaloid was evaluated against spore germination of some plant pathogenic fungi(Curvularia maculans, Curvularia species, C. palliscens, Colletotrichum gloeosporioides, Colletotrichum species, Afternaria solani, A. brassicae, Fusarium udum, Helminthosporium echinoclova and H. penniseti). It inhibited spore germination of all the test fungi. C. maculans, C. species, and C. palliscens were the most sensitive as complete inhibition of spore germination was observed at 1000 ppm. A. solani was not inhibited by this chemical.

표주박이끼(Funaria hygrometrica)에서 분리된 2종의 국내 미기록 내생균 (Two Unrecorded Endophytic Fungi Isolated from Funaria hygrometrica in Korea)

  • 최현숙;박혁;엄안흠
    • 한국균학회지
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    • 제47권4호
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    • pp.313-318
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    • 2019
  • 표주박이끼의 헛뿌리(rhizoid)에서 내생균을 분리하였다. 분리된 균주는 형태적 특성 및 internal transcribed spacer, large subunit rDNA 영역의 분자적 분석을 토대로 동정하였다. 연구 과정에서 2종의 국내 미기록종 내생균 균주를 확인하였고, 확인된 종은 Curvularia protuberata, Didymella anserina이다. 미기록종 내생균 균주의 형태적 특성 및 계통 분석 결과에 대해 기술하였다.