New Nematotoxic Indoloditerpenoid Produced by Gymnoascus reessii za-130

文献类型： 外文期刊

第一作者： Liu, Ting

作者： Liu, Ting;Dong, Dan;Zhang, TaoTao;Liu, Wei-cheng;Meyer, Susan L. F.;Chitwood, David J.;Chauhan, Kamlesh R.;Li, Jun

作者机构：

关键词： fungus;gymnoascole acetate;indoloditerpenoid;Gymnoascus reessii;Meloidogyne incognita;nematicide;nematode;nematotoxin;terpenoid

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

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收录情况： SCI

摘要： Chemical investigation of the fungal strain Gymnoascus reessii za-130, which was previously isolated from the rhizosphere of tomato plants infected by the root-knot nematode Meloidogyne incognita, led to the isolation and identification of a new indoloditerpenoid metabolite designated gymnoascole acetate. Its structure was established by spectroscopic methods including 1D- and 2D-NMR and MS analyses. Gymnoascole acetate demonstrated strong adverse effects on M. incognita second stage juvenile (J2) viability; exposure to 36 mu g/mL for 24 h induced 100% paralysis of J2 (EC50 = 47.5 mu g/mL). Gymnoascole acetate suppressed M. incognita egg hatch relative to controls by > 90% at 133 mu g/mL after 7 days of exposure. The numbers of root galls and J2 in both soil and roots were significantly reduced (p = 0.05) by treatment with 2-200 mu g/mL gymnoascole acetate/kg soil, compared to untreated control plants; nematode suppression increased with gymnoascole acetate concentration. This study demonstrated the nematotoxicity of gymnoascole acetate and indicates that it might be a potential biobased component in integrated management of M. incognita.

分类号： R15`S

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