薇甘菊杀线虫活性成分及其对番茄生长的影响

采用活性追踪法,从外来入侵杂草薇甘菊中提取到两种活性化合物——薇甘菊内酯和间-甲氧基苯甲酸。以南方根结线虫为测试对象,测试了两种化合物的杀线虫活性和卵囊孵化抑制率。结果表明,两种化合物具有中等强度的杀线虫活性,其中薇甘菊内酯活性较高,药后48 h的致死中浓度(LC50)为57.75 mg/L,药后6 d的抑制中浓度(IC50)为415.87 mg/L。另外,测试了两种化合物对寄主植物番茄生长、根系活力和叶片的超氧化物歧化酶(SOD)酶活的影响,结果表明两种化合物对番茄生长没有明显影响,但是可以显著减少根结线虫的侵染。根系活力和SOD酶活结果进一步证明了两种化合物抑制线虫侵染的活性。...

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Published in广东农业科学 Vol. 41; no. 19; pp. 70 - 74
Main Author 李君 李 曹坳程 沈斌斌
Format Journal Article
LanguageChinese
Published 中国农科院植物保护研究所,北京100193%贵州省中国科学院天然产物化学重点实验室,贵州贵阳,550002%中国农科院植物保护研究所,北京,100193%华南农业大学资源环境学院,广东广州,510642 2014
华南农业大学资源环境学院,广东广州510642
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ISSN1004-874X

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Summary:采用活性追踪法,从外来入侵杂草薇甘菊中提取到两种活性化合物——薇甘菊内酯和间-甲氧基苯甲酸。以南方根结线虫为测试对象,测试了两种化合物的杀线虫活性和卵囊孵化抑制率。结果表明,两种化合物具有中等强度的杀线虫活性,其中薇甘菊内酯活性较高,药后48 h的致死中浓度(LC50)为57.75 mg/L,药后6 d的抑制中浓度(IC50)为415.87 mg/L。另外,测试了两种化合物对寄主植物番茄生长、根系活力和叶片的超氧化物歧化酶(SOD)酶活的影响,结果表明两种化合物对番茄生长没有明显影响,但是可以显著减少根结线虫的侵染。根系活力和SOD酶活结果进一步证明了两种化合物抑制线虫侵染的活性。
Bibliography:LI Jun, LI Yan, CAO Ao-cheng, SHEN Bin-bin (1.College of Resources and Environment, South China Agricultural University, Guangzhou 510642, China; 2.Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; 3.The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guiyang 550002, China)
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Mikania micrantha; nematicidal activity; mikanolide; m-methoxy benzoic acid; host plant
Two compounds, mikanolide and m-methoxy benzoic acid, have been isolated from leaves of Mikania micrantha H. B. K. with method of bioactivity-guided fractionation. Nematode mortality and hatching inhibition rate were evaluated against Meloidogyne incognita. The results showed that two compounds possessed nematicidal activity and mikanolide had higher activity than m-methoxy benzoic acid. Median lethal concentration(LC50) and median inhibitory concentration(IC50) of mikanolide were 57.75 mg/L(at 48 h) and 415.87 mg/L(at 6 d), respectively. Their eff
ISSN:1004-874X