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Eudesmanolides from Wedelia trilobata (L.) Hitchc. as Potential Inducers of Plant Systemic Acquired Resistance

文献类型： 外文期刊

作者： Li, Yating 1 ; Hao, Xiaojiang 1 ; Li, Shifei 1 ; He, Hongping 1 ; Yan, Xiaohui 3 ; Chen, Yongdui 4 ; Dong, Jiahong 4 ; Zh 1 ;

作者机构： 1.Chinese Acad Sci, Kunming Inst Bot, State Key Lab Phytochem & Plant Resources West Ch, Kunming 650201, Yunnan, Peoples R China

2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

3.Southwest Forestry Univ, Coll Forestry, Key Lab Forest Disaster Warning & Control Yunnan, Kunming 650224, Yunnan, Peoples R China

4.Yunnan Acad Agr Sci, Kunming 650023, Yunnan, Peoples R China

关键词： eudesmanolides;Wedelia trilobata (L.) Hitchc.;tobacco mosaic virus;systemic acquired resistance

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

ISSN： 0021-8561

年卷期： 2013 年 61 卷 16 期

页码：

收录情况： SCI

摘要： Ten eudesmanolides (1-10) including five new ones (1-4 and 6) were isolated from the whole plant of Wedelia trilobata (L.) Hitchc., a notoriously invasive weed in South China. As main constituents of W. trilobata, eight of these eudesmanolides were tested for their antitobacco mosaic virus (TMV) activities by the conventional half-leaf and leaf-disk method along with Western blot analysis. All of the tested compounds, at 10 mu g/mL, showed strong antiviral activities in the pretreated tobacco plants with inhibition rates ranging from 46.7% to 76.5%, significantly higher than that of the positive control, ningnanmycin (13.5%). Their potential of inducing systemic acquired resistance (SAR) was also evaluated, and compounds 1 and 8 showed excellent induction activities. Furthermore, it was found that different concentrations of compound 1 promoted phenylalanine ammonia-lyase (PAL) activity in tobacco plants. To our knowledge, this is the first report that eudesmanolides could induce resistance in tobacco plants against the viral pathogen TMV.

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