1
|
Li YK, Xiong RF, Wu QY, Yao S, Qu X, Huang ZH, Su YL, Wu YP, Dong M, Zhou M, Hu QF. C-Alkylated flavonoids from the whole plants of Desmodium caudatum and their anti-TMV activity. Pest Manag Sci 2023; 79:3721-3730. [PMID: 37253683 DOI: 10.1002/ps.7589] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/05/2023] [Accepted: 05/30/2023] [Indexed: 06/01/2023]
Abstract
BACKGROUND Natural products are important sources of biopesticides to control plant virus, and flavonoids are identified as promising anti-tobacco mosaic virus (TMV) agents. Since Desmodium caudatum is a rich source of flavonoids, this study focuses on the discovery of the new anti-TMV active flavonoids from D. caudatum and their possible mode of action. RESULTS Three new (compounds 1-3) and nine known (compounds 4-12) C-alkylated flavonoids were isolated from D. caudatum. To the best of our knowledge, the framework of 1-3 was reported in natural products for the first time. In addition, 1-3, 5, and 6 showed notable anti-TMV activity with inhibition rates in the range of 35.8-64.3% at a concentration of 50 μg/mL, and these rates are higher than that of positive control (with inhibition rates of 34.6% ± 2.8). In addition, the structure-activity relationship study revealed that the (pyrrol-2-yl)methyl moiety on flavone can significantly increases the activity. This result is helpful to find new anti-TMV inhibitors. CONCLUSION C-Alkylated flavonoids showed potent activities against TMV with multiple modes of actions. The increase of defense-related enzyme activities, up-regulate the expression of defense related genes, down-regulate the expression of Hsp70 protein by inhibiting the related Hsp genes that are involved in tobacco resistance to TMV. By the actions mentioned earlier, the infection of TMV was influenced, thereby achieving the effects of control of TMV. The successful isolation of the earlier-mentioned flavonoids provide the new source of biopesticides to TMV proliferation, and also contribute to the utilization of D. caudatum. © 2023 Society of Chemical Industry.
Collapse
Affiliation(s)
- Yin-Ke Li
- Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal, State Ethnic Affairs Commission, Yunnan Minzu University, Kunming, China
| | - Rui-Feng Xiong
- Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal, State Ethnic Affairs Commission, Yunnan Minzu University, Kunming, China
- Yunnan Cigar Tobacco Team, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Qing-Yang Wu
- Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal, State Ethnic Affairs Commission, Yunnan Minzu University, Kunming, China
- Yunnan Cigar Tobacco Team, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Sui Yao
- Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal, State Ethnic Affairs Commission, Yunnan Minzu University, Kunming, China
| | - Xing Qu
- Yunnan Cigar Tobacco Team, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- Technology center, Yuxi Company of Yunnan Tobacco Company, Yuxi, China
| | - Zhi-Hua Huang
- Yunnan Cigar Tobacco Team, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- Technology center, Yuxi Company of Yunnan Tobacco Company, Yuxi, China
| | - Yu-Long Su
- Yunnan Cigar Tobacco Team, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
- Technology center, Yuxi Company of Yunnan Tobacco Company, Yuxi, China
| | - Yu-Ping Wu
- Yunnan Cigar Tobacco Team, Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Miao Dong
- Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal, State Ethnic Affairs Commission, Yunnan Minzu University, Kunming, China
| | - Min Zhou
- Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal, State Ethnic Affairs Commission, Yunnan Minzu University, Kunming, China
| | - Qiu-Fen Hu
- Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal, State Ethnic Affairs Commission, Yunnan Minzu University, Kunming, China
| |
Collapse
|