SOBIR1 Links Potato Responses to Potato Tuber Moth Attack and High Temperature Stress

作者：Chuzhen Chen, Ricardo A. R. Machado, Jian Zhong, Yadong Zhang, Wenjing He, Xiaoli He, Zhiyao Mao, Asim Munawar, Zeng‐Rong Zhu, Wenwu Zhou · 发表于：Plant Cell & Environment · 年份：2025 · DOI：10.1111/pce.70158 · 被引用次数：1 · 研究领域：Plant Parasitism and Resistance、Insect-Plant Interactions and Control、Plant Stress Responses and Tolerance

Herbivory and high temperature stress affect plant performance and frequently co-occur under natural conditions. The molecular mechanisms by which plants coordinate responses to these two stresses deserve more attention. Here, we explored how StSOBIR1, a leucine-rich repeat receptor-like kinase gene, modulates plant responses to herbivory and high temperature stress using genetic, molecular, biological, and chemical analysis approaches. StSOBIR1 encodes a plasma membrane-localized protein and its expression is rapidly induced upon herbivore attack. StSOBIR1 negatively regulates jasmonic acid (JA) signaling and JA-mediated defenses, thereby hindering herbivore resistance to potato tuber moth (Phthorimaea operculella) at a normal temperature (22°C). In contrast, the transcripts of StSOBIR1 were suppressed by high temperature (32°C). StSOBIR1 positively regulates plant responses to high temperature stress, including the accumulation of sucrose, proline and chlorophylls. Moreover, at high temperature, both the StSOBIR1-knock down and overexpression plants exhibited similar JA signaling and herbivore resistance to wild-type plants. Transcriptome analysis revealed that high temperature interferes with StSOBIR1-mediated defensive responses to herbivory by disrupting herbivory-associated gene co-expression networks and reprioritizing its functions. Taken together, these results show that StSOBIR1-mediated fine-tune plant responses to herbivory and high temperature, while under combin...