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. 2017 Dec 10;22(12):2195. doi: 10.3390/molecules22122195

Figure 3.

Figure 3

Principal component analysis (PCA) and orthogonal projection to latent structures-discriminant analysis (OPLS-DA) of UPLC-MS extracted metabolites from S. glaucum elicited with 20 and 200 μM prostaglandin (PG), methyl jasmonate (MeJA), geranylgeranlypyrophosphate (GGP) and arachidonic acid (AA) in addition to wounding harvested at 0, 24 and 48 h post elicitation. (A) PCA score plot of PC1 vs. PC2 scores and its corresponding loading plot (B) showing contributing metabolites and their assignments. The clusters are located at the distinct positions in two-dimensional space described by two vectors of principal component 1 (PC1) = 41% and PC2 = 26%; (C) OPLS-DA score plot of PC1 vs. PC2 scores and its corresponding loading plot (D) showing contributing metabolites and their assignments. Selected variable masses are highlighted in the loading-plot with m/z/retention time (s) pair and identifications are discussed in text.