• Title/Summary/Keyword: Drechslera portulacae

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Identification of Phytotoxins Produced by Drechslera portulacae, a Pathogen of Purslane(Portulaca oleracea) - II. Isolation of Zeaenol and Its Herbicidal Activity (쇠비름(Porturaca oleracea)의 병원균, Drechslera portulacae가 생산하는 식물독소의 구조 동정 - 제 2 보. Zeaenol의 단리 및 제초활성)

  • Kim, K.W.
    • Korean Journal of Weed Science
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    • v.14 no.3
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    • pp.192-198
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    • 1994

  • Zeaenol isolated from the culture filtrate of a fungal weed pathogen Drechslera portulacae, which causes necrosis on the leaves and stem of purslane (Portulaca oleracea). Its structure was determined by single-crystal x-ray diffraction method together with assignments of $^1H$ and $^{13}C$-NMR experiments. Zeaenol inhibited root length of Echinochloa crus-galli and Abutilon avicennae by 22.8% and 54.8% at $3{\times}10^{-6}M$, respectively.

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Identification of Phytotoxins Produced by Drechslera portulacae, a Pathogen of Purslane(Portulaca oleracea) - I. Isolation of Methyldihydroxyzearalenone and Its Herbicidal Activity (쇠비름(Porturaca oleracea)의 병원균, Drechslera portulacae가 생산하는 식물독소의 구조 동정 - 제 1 보. Methyldihydroxyzearalenone의 단리 및 제초활성)

  • Kim, K.W.;Cho, K.Y.
    • Korean Journal of Weed Science
    • /
    • v.14 no.3
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    • pp.184-191
    • /
    • 1994

  • A zearalenone derivative, methyldihydroxyzearalenone has been isolated from a plant pathogenic fungus, Drechslera portulacae which causes necrosis on the leaves and stem of Portulaca oleracea. It was characterized as 3, 4, 5, 6, 9, 10-hexahydro-8, 9, 16-trihydroxy-14-methoxy-3-methyl-1H-2-benzoxacyclotetradecine-1, 7(8H)-dione on the basis of spectral analysis. Methyldihydroxyzearalenone treatment at $3{\times}10^{-5}M$ inhibited root length of Echinochloa crus-galli and Abutilon avicennae by 35.7% and 72.6% as compared with the control, respectively.

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