Anti-TMV Activity and Functional Mechanisms of Two Diterpenoid Alkaloids Isolated from Dendrobium findlayanum

文献类型： 外文期刊

第一作者： Song, Cheng-Gang

作者： Song, Cheng-Gang;Yang, Yang;Cui, Wenjing;Chen, Wei;Qin, Jianchun;Liu, Jinliang;Wang, Shouxian

作者机构：

关键词： alkaloids; Dendrobium findlayanum; tobacco mosaic virus; antiviral; mechanism

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.2； 五年影响因子：6.4 ）

ISSN： 0021-8561

年卷期： 2025 年 73 卷 4 期

页码：

收录情况： SCI

摘要： Tobacco mosaic virus (TMV) is a major threat to crops, making the discovery of green biopesticides essential. Herein, we present two active ingredients derived from the medicinal plant Dendrobium findlayanum, findlayine A (1) and dendrofindline B (2), as promising precursor compounds for TMV inhibitors. Among them, 2 inhibited TMV infestation on tobacco leaves at a rate of 38.6%, which was close to that of the commercial antiviral agent ningnanmycin (43.1%). Both 1 and 2 could effectively alleviate the destruction of tobacco leaf protoplasts by TMV infestation, and enhance the resistance of tobacco to TMV by affecting the activities of phenylalaninammo-nialyase (PAL), peroxidase (POD) and superoxide dismutase (SOD). Additionally, 1 and 2 significantly down-regulated the expression of TMV coat protein (CP) and inhibited CP-mediated aggregation of TMV, thereby reducing its infestation capacity. This study systematically investigated the mechanism of anti-TMV activity of diterpenoid alkaloids from D. findlayanum, with a view to providing new insights into the creation of novel green antiviral agents.

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