数字农科院2.0

Heat stress reprograms herbivory-induced defense responses in potato plants

文献类型： 外文期刊

作者： Jian Zhong;Jinyi Zhang;Yadong Zhang;Yang Ge;Wenjing He;Chengjuan Liang;Yulin Gao;Zengrong Zhu;Ricardo A.R. Machado;Wenwu Zhou

作者机构：

关键词： High temperature;Metabolic reprogram;Phthorimaea operculella;Phylotranscriptomic analysis;Plant resistance to insect herbivores;Solanum tuberosum

期刊名称： BMC Plant Biology

ISSN： 1471-2229

年卷期： 2024 年 24 卷 1 期

页码：

收录情况： SCIE（2024版）

摘要： Climate change is predicted to increase the occurrence of extreme weather events such as heatwaves, which may thereby impact the outcome of plant-herbivore interactions. While elevated temperature is known to directly affect herbivore growth, it remains largely unclear if it indirectly influences herbivore performance by affecting the host plant they feed on. In this study, we investigated how transient exposure to high temperature influences plant herbivory-induced defenses at the transcript and metabolic level. To this end, we studied the interaction between potato (Solanum tuberosum) plants and the larvae of the potato tuber moth (Phthorimaea operculella) under different temperature regimes. We found that P. operculella larvae grew heavier on leaves co-stressed by high temperature and insect herbivory than on leaves pre-stressed by herbivory alone. We also observed that high temperature treatments altered phylotranscriptomic patterns upon herbivory, which changed from an evolutionary hourglass pattern, in which transcriptomic responses at early and late time points after elicitation are more variable than the ones in the middle, to a vase pattern. Specifically, transcripts of many herbivory-induced genes in the early and late defense stage were suppressed by HT treatment, whereas those in the intermediate stage peaked earlier. Additionally, we observed that high temperature impaired the induction of jasmonates and defense compounds upon herbivory. Moreover, using jasmonate-reduced (JA-reduced, irAOC) and -elevated (JA-Ile-elevated, irCYP94B3s) potato plants, we showed that high temperature suppresses JA signaling mediated plant-induced defense to herbivore attack. Thus, our study provides evidences on how temperature reprograms plant-induced defense to herbivores.

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