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Antifungal Activity of Alpha-Mangostin against Colletotrichum gloeosporioides In Vitro and In Vivo

文献类型： 外文期刊

作者： Ye, Huochun 1 ; Wang, Qin 1 ; Zhu, Fadi 1 ; Feng, Gang 1 ; Yan, Chao 1 ; Zhang, Jing 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci CATAS, Environm & Plant Protect Inst, Haikou 571101, Hainan, Peoples R China

2.Minist Agr, Key Lab Monitoring & Control Trop Agr & Forest In, Haikou 571101, Hainan, Peoples R China

3.Hainan Univ, Coll Plant Protect, Haikou 570228, Hainan, Peoples R China

关键词： alpha-mangostin; antifungal activity; Colletotrichum gloeosporioides; spore germination; mitochondria

期刊名称：MOLECULES （ 影响因子：4.411； 五年影响因子：4.587 ）

ISSN：

年卷期： 2020 年 25 卷 22 期

页码：

收录情况： SCI

摘要： We investigated alpha-mangostin (alpha-mangostin, alpha-MG), a xanthone natural product extracted from the pericarp of mangosteen (Garcinia mangostana), for its antifungal activities and possible mechanism against Colletotrichum gloeosporioides, which causes mango anthracnose. The results demonstrated that alpha-MG had a relatively high in vitro inhibitory activity against C. gloeosporioides among 20 plant pathogenic fungi. The median effective concentration (EC50) values of alpha-MG against mycelial growth were nearly 10 times higher than those of spore germination inhibition for both strains of C. gloeosporioides, the carbendazim-sensitive (CBD-s) and carbendazim-resistant (CBD-r). The results suggested that alpha-MG exhibited a better inhibitory effect on spore germination than on the mycelial growth of C. gloeosporioides. Further investigation indicated that the protective effect could be superior to the therapeutic effect for mango leaves for scab development. The morphological observations of mycelium showed that alpha-MG caused the accumulation of dense bodies. Ultrastructural observation further revealed that alpha-MG caused a decrease in the quantity and shape of the swelling of mitochondria in the mycelium cells of C. gloeosporioides. In addition, bioassays disclosed that the inhibitory activity of alpha-MG on spore germination was reduced by adding exogenous adenosine triphosphate (ATP). These results suggested that the mode of action of alpha-MG could be involved in the destruction of mitochondrial energy metabolism. The current study supports alpha-MG as a natural antifungal agent in crop protection.

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