Ectropis obliqua-Induced Secondary Metabolites Are Regulated by Methyl Jasmonate in a Threshold-Dependent Manner

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茶尺蠖诱导的次生代谢产物受茉莉酸甲酯的阈值依赖性调节

关键词：

来源：

International Journal of Molecular Sciences 期刊

全文链接：

//agri.nais.net.cn/topic/downloadFile/6b6a8d81-4226-46c1-a468-7da5e56bf3fd

来源地址：

https://www.mdpi.com/1422-0067/26/9/4248

资源所属：

茶学研究专题

类型：

学术文献

语种：

英语

原文发布日期：

2025-04-29

摘要：

In this study, we investigated seven key special metabolites, including p-coumaroylputrescine, feruloylputrescine, prunin, naringenin, and three monolignols, to address this knowledge gap. Epicatechin was selected as a positive control based on its well-documented regulation through the JA signaling pathway. Notably, the content of all selected compounds was significantly increased by E. obliqua infestation. Furthermore, exogenous application of high-dose methyl jasmonate (MeJA) induced the accumulation of six of the eight compounds, excluding p-coumaryl alcohol and sinapyl alcohol, whereas low-dose MeJA failed to elicit their accumulation. To confirm the results, we screened two bioactive molecules, D-allose and L-theanine, which significantly increased the endogenous JA levels at low concentrations. Interestingly, neither D-allose nor L-theanine triggered the biosynthesis of these defensive compounds. Additionally, D-allose-treated tea leaves had no significant effect on the performance of E. obliqua larvae. These findings demonstrate that the metabolic accumulation induced by E. obliqua is mediated through a high-threshold JA signaling cascade. This study provides novel insights into the relationship between plant resistance and JA signaling pathway, advancing our understanding of special metabolites mediated plant-insect interactions.