Structures and antipathogenic fungi activities of flavonoids from pathogen-infected Astragalus adsurgens

被引：14

作者：

Li, Ya ^{[1
]}

Wei, Wenjun ^{[1
]}

Zhang, Jiwen ^{[2
]}

Li, Guangda ^{[1
]}

Gao, Kun ^{[1
]}

机构：

[1] Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Lanzhou, Gansu, Peoples R China

[2] Northwest A&F Univ, Key Lab Bot Pesticide R&D Shaanxi Prov, Yangling, Shaanxi, Peoples R China

来源：

NATURAL PRODUCT RESEARCH | 2019年 / 33卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Astragalus adsurgens; flavonoids; pathogenic infection; antipathogenic fungi activity; RESISTANCE; DIVERSITY;

D O I：

10.1080/14786419.2017.1413560

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Healthy Astragalus adsurgens is a highly palatable forage widely cultivated in arid areas of north China, while pathogen- (Embellisia asttrgali) infected A. adsurgens is poisonous forage and often causes disastrous livestock losses. A phytochemical investigation was carried out on the E. asttrgali-infected A. adsurgens; as a result, a new compound, (2R, 3S)-7,4 '-dimethoxy-2 '-hydroxyflavanol (1), together with nine known flavonoids was obtained. It was found that the content of most of these compounds in E. asttrgali-infected A. adsurgens was higher than that in healthy A. adsurgens. Moreover, compounds 2 and 3 exhibited weak inhibitory activity against Fusarium graminearum and E. asttrgali with EC50 over 100 mu g/mL, and showed moderate inhibitory activity against Bipolaris sorokinianum with EC50 of 39.1 and 95.0 mu g/mL. Compounds 1-4 exhibited a high degree of inhibitory activity against Curvularia lunata, with 21.73, 43.93, 45.02 and 44.51% inhibition ratio at concentration of 50 mu g/mL. [GRAPHICS] .

引用

页码：822 / 826

页数：5

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