Fig. 4

Component 1 vs component 2 of the partial least squares discriminant analysis (PLS-DA) of the changes of the metabolomes of the epiphytic extracts in response to the antibiotic treatment. Case scores are represented in (a-) and metabolite loading in (b-). Letters indicate different organs (F, flowers; L, leaves), and colors indicate different treatments (green, control; red, antibiotic treated). Numbers indicate the day the samples were collected (0 without treatment and 1, 7, 15, and 30 days after treatment). Variables are colored and labeled as described for Fig. 1