Effect of pseudolaric acid B on biochemical and physiologic characteristics in Colletotrichum gloeosporioides

文献类型： 外文期刊

第一作者： Zhang, Jing

作者： Zhang, Jing;Ye, Huo-Chun;Zhou, Ying;Yuan, En-Lin;Li, Ye;Yan, Chao;Liu, Xia;Feng, Gang;Zhang, Jing;Ye, Huo-Chun;Yuan, En-Lin;Li, Ye;Yan, Chao;Liu, Xia;Feng, Gang;Han, Ru-Yue;Zhou, Ying;Guo, Yong-Xia;Zhang, Zheng-Ke;Yuan, En-Lin

作者机构：

关键词： Pseudolaric acid B; Antifungal activity; Action mechanism; Plant pathogenic fungi

期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：3.963； 五年影响因子：4.454 ）

ISSN： 0048-3575

年卷期： 2018 年 147 卷

页码：

收录情况： SCI

摘要： In our previous study on natural products with fungicidal activity, pseudolaric acid B (PAB) isolated from Pseudolarix amabilis was examined to inhibit significantly mango anthracnose (Colletotrichum gloeosporioides) in vivo and in vitro. In the current study, sensitivity of 17 plant pathogenic fungi to PAB was determined. Mycelial growth rate results showed that PAB possessed strong antifungal activities to eleven fungi with median effective concentration (EC50) values ranging from 0.087 to 1.927 mu g/mL. EC50 of PAB against spore germination was greater than that of mycelium growth inhibition, which suggest that PAB could execute antifungal activity through mycelia] growth inhibition. Further action mechanism of PAB against C. gloeosporioides was investigated, in which PAB treatment inhibited mycelia dry weight, decreased the mycelia reducing sugar and soluble protein. Furthermore, PAB induced an increase in membrane permeability, inhibited the biosynthesis of ergosterol, caused the extreme alteration in ultrastructure as indicated by the thickened cell wall and increased vesicles. These results will increase our understanding of action mechanism of PAB against plant pathogenic fungi.

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