Environmental Drivers of Bacterial Community Diversity in the Rhizosphere Soil of Zanthoxylum nitidum (Roxb.) DC from Different Origins and Their Correlation with Bioactive Compounds

Based on previous literature research, the sampling locations and methods were determined. The sampling sites were chosen in Guangxi, Guangdong, and Fujian provinces, which are the major producing areas of Z. nitidum. Soil samples were collected from an area with a radius of 5 mm and a depth of 30 cm around the roots of Z. nitidum. Impurities were removed from the samples before they were thoroughly mixed and placed in ice boxes. Finally, the soil samples were transported back to the laboratory and stored in a refrigerator for future use.Specifically, sample A1 was obtained from Nanning, Guangxi; sample A2 from Yulin, Guangxi; sample A3 from Guangzhou, Guangdong; sample B1 from Hezhou, Guangxi; sample B2 from Fuzhou, Fujian; and sample B3 from Ningde, Fujian. These soil samples were collected from the root zones of wild plant seedlings.