Fig. 3.

UPLC-qTOF-positive ionization MS (m/z 100–1000) principal component analyses of E. lysistemon unelicited cell culture samples (○), cell cultures treated with 1.0 mM MeJA at 0 h (o), 12 h (Δ) and 24 h (+) (n = 3). The metabolome clusters are located at the distinct positions in two-dimensional space prescribed by two vectors of principal component 1 (PC1 = 93%) and principal component 2 (PC2 = 6%). (A) Score Plot of PC1 versus PC2 scores. (B) Loading plot for PC1 and PC2 contributing to mass peaks and their assignments, with each metabolite denoted by its mass/rt (s) pair.