Synthetic chloroinconazide compound exhibits highly efficient antiviral activity against tobacco mosaic virus. Issue 11 (9th June 2020)

• Record Type: Journal Article
• Authors: Lv, Xing; Xiang, Shunyu; Wang, Xiangchuan; Wu, Lei; Liu, Changyun; Yuan, Mengting; Gong, Weiwei; Win, HsuMyat; Hao, Chunyan; Xue, Yang; Ma, Lisong; Cheng, Daoquan; Sun, Xianchao
• Is Part Of: Pest management science. Volume 76:Issue 11(2020)
• Page Start: 3636
• Page End: 3648
• Publication Date: 2020-06-09
• Subjects: tryptophan -- CHI -- antiviral -- antioxidant enzymes -- ROS -- salicylic acid; Pests -- Control -- Periodicals; Pesticides -- Periodicals; 632.9
• DOI: 10.1002/ps.5910
• Languages: English
• ISSNs: 1526-498X

Abstract

Abstract: BACKGROUND: Development of anti‐plant‐virus compounds and improvement of biosafety remain hot research topics in controlling plant viral disease. Tobacco mosaic virus (TMV) infects all tobacco species as well as many other plants worldwide and causes severe losses in tobacco production. To date, no efficient chemical treatments are known to protect plants from virus infection. Therefore, the search for a highly active antiviral compound with high efficacy in field application is required. RESULTS: We reported the synthesis of a novel antiviral halogenated acyl compound Chloroinconazide (CHI) using tryptophan as a substrate and examined its anti‐TMV activity. We found that CHI displayed the ability to strongly inhibit the infection of TMV on Nicotiana benthamiana via multiple mechanisms. We observed that CHI was able to impair the virulence of TMV by directly altering the morphological structure of virions and increasing the activity of anti‐oxidative enzymes, resulting in reduced TMV‐induced ROS production during infection of the plant. In addition, the expression of salicylic acid‐responsive genes was significantly increased after CHI application. However, after application of CHI on SA‐deficient NahG plants no obvious anti‐TMV activity was observed, suggesting that the SA signaling pathway was required for CHI‐induced anti‐TMV activity associated with reduced infection of TMV. CHI exhibited no effects on plant growth and development. CONCLUSION: The easily synthesized CHI can actively induce plant resistance against TMV as well as act on virus particles and exhibits high biosafety, which provides a potential for commercial application of CHI in controlling plant virus disease in the future. © 2020 Society of Chemical Industry Abstract : Proposed model illustrating the dual anti‐TMV activities of CHI. 1). CHI can inactivate the TMV virus particles to reduce its infection capacity. 2). CHI can increase the activity of antioxidant enzymes such as SOD, POD, CAT, resulting in the reduced ROS production in TMV infected plants, and can activate the synthesis of SA and induce SA signaling pathway. © 2020 Society of Chemical Industry