Schematic diagram illustrates the dependence of Suillus bovinus volatile organic compounds (VOCs) induced lateral root formation on auxin signaling pathways. Orange dots in the figure represent VOCs released by S. bovinus. In the table, a “√” indicates that the VOCs, α-humulene or β-cedrene, rely on the specific auxin pathway to stimulate plant root growth. A “-” means the induction is independent of that pathway, while a “?” denotes uncertainty about the pathway’s involvement. Genes listed in parentheses indicate their role in the process by which S. bovinus VOCs promote root growth via the corresponding pathway. A gene marked with an “×” in parentheses signifies its non-participation in this process. Pm: Pinus massoniana; At: Arabidopsis thaliana.