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根據2019年刊登於Scientific Reports之研究顯示，土壤中的有機質含量愈高，紫錐花根部萃取物促進巨噬細胞活性。而細菌群落(bacterial communitiy)亦因栽培環境而改變。



參考文獻:Haron et al., 2019. Plant microbiome-dependent immune enhancing action of Echinacea purpurea is enhanced by soil organic matter content. Sci. Rep. 9:136
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6333828/