The chemical language between plants and microbes is a sophisticated system of signal exchange involving a diverse array of molecular compounds that regulate complex host–microbe interactions. This intricate communication network encompasses primary and specialized metabolites that underpin host–microbe nutrient exchange, host–microbe assembly processes, or plant–soil feedbacks that ultimately explain host–microbiota associations, as well as plant health and disease states. In this Virtual Issue, we present a collection of New Phytologist articles that illustrate how the chemical language between plants and microbes, as well as among microbes, is critical for understanding high-level biological organization, beneficial plant–microbiota associations and ecosystem function, but is also a prerequisite for advancing agricultural sustainability and innovation.

• Published: 2 October 2024

Editors:

Stéphane Hacquard,  Francis M. Martin

• network
• plant signalling
• plant-soil feedbacks
• ecosystem function