Chemical Differentiation of Dendrobium officinale and Dendrobium devonianum by Using HPLC Fingerprints, HPLC-ESI-MS, and HPTLC Analyses

Figure 4

PLS-DA scores plot and VIP (variable importance plot) of D. officinale and D. devonianum. (a) The scores plot of PLS-DA revealed that D. officinale and D. devonianum could be differentiated according to the 15 selected common peaks. (b) VIP of peak 1 to peak 15 corresponding to the peaks marked in the chromatogram of HPLC fingerprints. Peaks 7, 4, 9, 12, 15, 2, 3, and 8 were all above 1.0; all the peaks were significantly different in the two classes. between D. officinale and D. devonianum.

(a)

(b)