Allelopathy is a biochemical interaction between plants in which a donor plant releases secondary metabolites, allelochemicals, that are detrimental to the growth of its neighbours. Traditionally considered as bilateral interactions between two plants, allelopathy has recently emerged as a cross-kingdom process that can influence and be modulated by the other organisms in the plant’s environment. Here, we review the current knowledge on plant–interkingdom interactions, with a particular focus on benzoxazinoids. We highlight how allelochemical-producing plants influence not only their plant neighbours but also insects, fungi, and bacteria that live on or around them. We discuss challenges that need to be overcome to study chemical plant–interkingdom interactions, and we propose experimental approaches to address how biotic and chemical processes impact plant health.

化感作用是植物之间的生化相互作用，其中供体植物释放有害于其邻居生长的次生代谢产物，化感物质。传统上，化感病被认为是两种植物之间的双向相互作用，最近已成为一种跨王国的过程，可以影响植物环境中的其他生物并受其调节。在这里，我们回顾了有关植物与植物相互作用的最新知识，特别是苯并恶嗪类化合物。我们强调了产生化感物质的植物不仅会影响其植物邻居，而且还会影响生活在其周围或周围的昆虫，真菌和细菌。我们讨论了研究化工厂与植物之间的相互作用时需要克服的挑战，