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Background The plant microbiome is vital for plant health, fitness, and productivity. Interestingly, plant metabolites and the plant microbiome can influence each other. The combination of metabolomics and microbiome may reveal the critical links between the plant and its microbiome. It is of great significance to agricultural production and human health, especially for Chinese medicine research.  Aconitum vilmorinianum  Kom. is a herb with alkaloid activities, and its roots are the raw material for some Chinese medicines. Former studies have investigated alkaloidal metabolites and antibacterial activities of endophytes in  A. vilmorinianum  roots. However, there are limited reports on the root microbiota that can influence the alkaloidal metabolome of  A. vilmorinianum . Results This research used ultra performance liquid chromatography-tandem mass spectrometry technology and high-throughput sequencing to examine the alkaloidal metabolome, bacterial microbiota, and fungal microbiota in  A. vilmorinianum  roots at two different sites in China. The results revealed that the samples from the two sites were rich in distinct alkaloidal metabolites and recruited significantly different root microbiota. Based on bioinformatics analysis, we found the potential bacterial and fungal microbiota impacting the alkaloidal metabolome in  A. vilmorinianum . Conclusion Our findings reveal the composition of the alkaloidal metabolome, bacterial root microbiota, and fungal root microbiota in  A. vilmorinianum  roots at two different sites. Potential root microbiota that can influence the alkaloidal metabolome of  A. vilmorinianum  are indicated. This study provides a strategy for the cultivation and research of  A. vilmorinianum  and other Chinese herbs.

Metabolomics and microbiome reveal potential root microbiota affecting the alkaloidal metabolome in Aconitum vilmorinianum Kom.