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Pest Manag Sci

Title:		Elevating herbivore-induced JA-Ile enhances potato resistance to the polyphagous beet armyworm but not to the oligophagous potato tuber moth
Author(s):		Li Y; Tang J; Qi Y; Yang F; Su X; Fu J; Han X; He C; Xu Y; Zhan K; Xia H; Wu J; Wang L;
Address:		"Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China. College of Life Science, Shaanxi Normal University, Xi'an, China. School of Ecology and Environmental Science, Yunnan University, Kunming, China. University of Chinese Academy of Sciences, Beijing, China. Yunnan State Farms Zhaotong Agricultural Investment Co., Ltd, Zhaotong, China. Xuanwei Seed Potato Research and Development Center, Xuanwei, China"
Journal Title:		Pest Manag Sci
Year:		2023
Volume:		20221013
Issue:		1
Page Number:		357 - 367
DOI:		10.1002/ps.7205
ISSN/ISBN:		1526-4998 (Electronic) 1526-498X (Linking)
Abstract:		"BACKGROUND: The oligophagous potato tuber moth (PTM), Phthorimaea operculella, and the polyphagous beet armyworm (BAW), Spodoptera exigua, are two destructive pests of potato, and infestations can lead to serious reduction in potato yield. However, potato plant responses to the two herbivories are only poorly understood. Endogenous jasmonoyl-isoleucine (JA-Ile) is a signal responsible for the induction of plant anti-herbivore defenses. Elevation of JA-Ile by blocking its catabolism is considered to be an effective and sustainable approach to enhance plant resistance to insect pests. However, it is not clear whether this approach can enhance potato resistance to PTM and BAW. RESULTS: We demonstrated that the transcriptional changes induced by simulated PTM and BAW feeding overlap to a large extent, and that 81.5% of the PTM- and 90.5% of the BAW-responsive genes were commonly regulated. We also generated potato transgenic lines, irStCYP94B3s, in which the three JA-Ile hydroxylases were all simultaneously silenced. These lines exhibited enhanced resistance only to BAW, but not to PTM, although levels of JA-Ile and its downstream induced defensive chemicals, including caffeoylputrescine, dicaffeoylspermidine, lyciumoside II, and the nicotianosides I, II, and VII, were all present at higher levels in PTM-infested than in BAW-infested irStCYP94B3s lines. CONCLUSION: Our results provide support for the hypothesis that StCYP94B3 genes are able to act as potential targets for the control of polyphagous insect pests in potato, and reveal that the oligophagous PTM has evolved an effective mechanism to cope with JA-Ile-induced anti-herbivore defenses. (c) 2022 Society of Chemical Industry"
Keywords:		Animals *Solanum tuberosum/genetics *Beta vulgaris *Moths/genetics JA-Ile hydroxylase beet armyworm jasmonate potato tuber moth;
Notes:		"MedlineLi, Yi Tang, Jinxiang Qi, Yuechen Yang, Fei Su, Xiaohang Fu, Jun Han, Xiaonv He, Caihua Xu, Youxian Zhan, Kang Xia, Haibin Wu, Jinsong Wang, Lei eng Central Guidance on Local Science and Technology Development Fund of Yunnan Province (202107AC110014)/ Technology Transfer into Yunnan Project (202003AD150005)/ England 2022/10/01 Pest Manag Sci. 2023 Jan; 79(1):357-367. doi: 10.1002/ps.7205. Epub 2022 Oct 13"