• Title/Summary/Keyword: collectotrichum

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I. Anthracnose of Tea Tree Caused by Collectotrichum theae-sinensis (차나무의 병해 I. Collectotirchum theae-sinensis에 의한 차 탄저병)

  • 박서기
    • Plant Disease and Agriculture
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    • v.1 no.2
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    • pp.26-28
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    • 1995
  • Anthracnose of tea tree, Camellia sinensis, occurred severely at tea plantation of Boseung, Chonnam. Irregular, dark brown spots appeared on tips and margins of mature leaves in early stage. As the disease progresses, the lesions were covered with numerous, small, black, slightly raised pustules (acervuli). The causal fungus of anthracnose was identified as Colletotrichum theae-sinensis (Miyake) Yamamoto. Symptoms by C. theae-sinensis appeared around 20 days after artificial inoculation.

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Screening of Myxobacteria Inhibiting the Growth of Collectotrichum acutatum Causing Anthracnose on Pepper (고추탄저균 성장 억제 점액세균의 탐색)

  • Chung, Jin-Woo;Lee, Cha-Yul;Yun, Sung-Chul;Cho, Kyung-Yun
    • Microbiology and Biotechnology Letters
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    • v.36 no.1
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    • pp.21-27
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    • 2008
  • As an effort to search new bacterial biocontrol agents against pepper anthracnose, we screened myxobacteria, which might inhibit the growth of Colletotrichum acutatum, the agent of that plant disease. When 93 myxobacterial strains including 59 Myxococcus spp. and 34 Corallococcus spp. were tested against C. acutatum ACYSJ001 on agar plates, 10 strains identified as the genus Myxococcus significantly obstructed the growth of C. acutatum, whereas the majority of strains belonging to the genus Corallococcus did not demonstrate any counteractive effect. Such results have indicated that the strains of the genus Myxococcus have a high potential to play roles of biocontrol agents for control of pepper anthracnose. These also have revealed that the strains of the genus Myxococcus could be used as excellent microbial resources for screening novel antifungal substances.

Isolation and Antifungar Activity of Bacillus ehimensis YJ-37 as Antagonistic against Vegetables Damping-off Fungi (채소류 모잘록병균에 길항하는 Bacillus ehimensis YJ-37의 선발과 항진균성)

  • 주길재;김진호;강상재
    • Journal of Life Science
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    • v.12 no.2
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    • pp.200-207
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    • 2002
  • This study was carried out to isolate of antagonistic bacterium against Pythium ultimum and Rhizoctonia solani AG-4, causal pathogens of vegetables damping-off. Total of 600 strains were isolated from soil and plait roots. The isolates were screened for antagonism against Pythium ultimum and Rhizoctonia solani AG-4. One strain, named YJ-37, was sellected for detained study among those microoganisms screened. It was identified as Bacillus ehimensis based on morphological and physiological characterisitics according to the Bergey's mannual of systematic bacteriology, Sherlock system of Microbial ID Inc. and 16S rDNA sequences methods. Furthermore Bacillus ehimensis YJ-37 showed antifungal activities against Alternaria altrata, Collectotrichum gloeosporioides, Didymella bryoniae, Fusarium moniliforme, Fusarium oxysporum, F. oxysporum cucumerinum, F. oxysporum niveum, Gloeosporium sp., Glomerella sp., G. cingulata, G. lagenaria, Penicillium digitatum, P. italicum, Phytophthora capsici, Sclerotinia sclerotiorum, and Stemprhylium solani.

Cultural characteristics of Bacillus velezensis HKB-1 in the water extract of the composted spent mushroom substrate of Lentinula edodes and biological control of Phytophthora blight disease of pepper (표고버섯 수확후배지 퇴비 추출물에서 Bacillus velezensis HKB-1의 배양적 특징 및 고추역병의 생물학적 방제)

  • Kim, Ja-Yoon;Seo, Hyun-Ji;Kang, Dae-Sun;Kang, Hee-Wan
    • Journal of Mushroom
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    • v.19 no.4
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    • pp.272-278
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    • 2021
  • Bacillus velezensis HKB-1 was isolated from the composted spent mushroom substrate of Lentinula edodes (LeCSMS) and inhibited mycelial growth of phytopathogenic fungal species, Phythhopthora capsici, Collectotrichum coccodes and Fusarium oxysporium by more than 70%. B. velezensis HKB-1 showed bacterial growth rate 10 to 100 times higher than that of other commercial bacterial media in water extract of LeCSMS supplemented with 1% molasses. The LeCSMS medium was effective in promoting the growth of pepper and controlling Phytophthora blight disease of pepper.

Elicitation and In Situ Recovery of Alkaloids in Suspension Cultures of California Poppy

  • Byun, Sang-Yo;Pedersen, Henrik
    • Journal of Microbiology and Biotechnology
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    • v.1 no.3
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    • pp.220-226
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    • 1991
  • Large and rapid increases in benzophenanthridine alkaloid production occured in suspension cultures of Eschscholtzia californica cells treated with elicitors. Response to different biotic elicitors showed that elicitors prepared from yeast extract, Collectotrichum lindemuthianum and Verticillium dahliae induced alkaloid formation. Highest alkaloid accumulation was obtained with $60\;\mu\textrm{g}$ of yeast extract elicitor per gram of fresh cell weight. In time course performance after elicitor addition, more than 40 hours were required to obtain saturated alkaloid accumulation. Compounded silicone fluid, an ideal accumulation phase for two-phase culture of E. californica, accumulated a large amount of alkaloids produced in a specific manner. Elicitation in two-phase culture clearly increased net alkaloid production as well as their concentrations in the accumulation phase.

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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.

Inhibitive Effect of Fuyuziphine isolated from Plant (Pittapapra) (Fumaria indica) on Spore Germination of Some Fungi

  • Pandey, M. B.;Singh, Ashok K.;Singh, Anil K.;Singh, U. P.
    • Mycobiology
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    • v.35 no.3
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    • pp.157-158
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    • 2007
  • The alkaloid fuyuziphine was isolated from the whole plant of Fumaria indica. It had inhibitive effect against spore germination of some plant pathogenic fungi (Collectotrichum sp., C. gloeosporioides, C. falcatum, Curvularia maculans, C. lunata, Erysiphe cichoracearum, Helminthosporium pennisetti, Oidium erysiphoides, Ustilago cynodontis, Alternaria chieranthi, A. mel-ongenae, A. brassicicola and A. solam). Curvularia lunata, Oidium erysiphoides, Alternaria brassicicola and A. solani did not germinate at 750 and 1000 ppm and Colletotrichum gloeosporioides, C. falcatum, Curvularia maculans were inhibited at 1000 ppm for 24 hr incubation. Germination of most fungi was significantly inhibited at $100{\sim}750ppm$.