Fig. 8

DL analysis and chemical analysis of the wild rhubarb samples. a Dendrogram of the hierarchical cluster analysis of DL properties in the wild rhubarb samples analysis (Distance Measure: Euclidean; Clustering Algorithm: Ward). b Histograms comparing the DL properties between two groups. ****p < 0.0001 (two-tailed, unpaired Student’s t-test). c Histograms comparing the contents of chemical components between two groups. **p < 0.01; ns, no significant difference (two-tailed, unpaired Student’s t-test)