Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Synthetic Biology, Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518120, China.
Key Laboratory of Pest Monitoring and Green Management, Ministry of Agriculture and Rural Affairs, Department of Entomology, China Agricultural University, Beijing, 100091, China.
Plant J. 2023 Jun;114(5):1164-1177. doi: 10.1111/tpj.16180. Epub 2023 Mar 30.
Non-volatile metabolites constitute the bulk of plant biomass. From the perspective of plant-insect interactions, these structurally diverse compounds include nutritious core metabolites and defensive specialized metabolites. In this review, we synthesize the current literature on multiple scales of plant-insect interactions mediated by non-volatile metabolites. At the molecular level, functional genetics studies have revealed a large collection of receptors targeting plant non-volatile metabolites in model insect species and agricultural pests. By contrast, examples of plant receptors of insect-derived molecules remain sparse. For insect herbivores, plant non-volatile metabolites function beyond the dichotomy of core metabolites, classed as nutrients, and specialized metabolites, classed as defensive compounds. Insect feeding tends to elicit evolutionarily conserved changes in plant specialized metabolism, whereas its effect on plant core metabolism varies widely based the interacting species. Finally, several recent studies have demonstrated that non-volatile metabolites can mediate tripartite communication on the community scale, facilitated by physical connections established through direct root-to-root communication, parasitic plants, arbuscular mycorrhizae and the rhizosphere microbiome. Recent advances in both plant and insect molecular biology will facilitate further research on the role of non-volatile metabolites in mediating plant-insect interactions.
非挥发性代谢物构成了植物生物质的大部分。从植物与昆虫相互作用的角度来看，这些结构多样的化合物包括有营养的核心代谢物和防御性的特殊代谢物。在这篇综述中，我们综合了目前关于非挥发性代谢物介导的多种尺度的植物与昆虫相互作用的文献。在分子水平上，功能遗传学研究已经揭示了大量针对模式昆虫物种和农业害虫的植物非挥发性代谢物的靶标受体。相比之下，昆虫衍生分子的植物受体的例子仍然很少。对于昆虫食草动物来说，植物非挥发性代谢物的功能不仅仅局限于核心代谢物（归类为营养物质）和特殊代谢物（归类为防御化合物）的二分法。昆虫取食往往会引起植物特殊代谢物的进化保守性变化，而其对植物核心代谢物的影响则因相互作用的物种而有很大差异。最后，最近的几项研究表明，非挥发性代谢物可以介导社区尺度上的三方交流，这是通过直接的根对根通讯、寄生植物、丛枝菌根和根际微生物组建立的物理连接来实现的。植物和昆虫分子生物学的最新进展将有助于进一步研究非挥发性代谢物在介导植物与昆虫相互作用中的作用。
