FIGURE 2.

Molecular network of 706 compounds from 12 Piper species color-coded by ClassyFire chemical classification annotation (A) or by organ-specific occurrence across the 12 species (B). Nodes represent compounds, and edges represent the structural similarity between different compounds (see section “Molecular Networking” methods for detail). Enlarged, diamond-shaped nodes represent compounds identified by the Boruta analysis as important for distinguishing among organs. In (B), compounds are coded as occurring in “fruit” if they occur in one or more of the three sample types (unripe pulp, ripe pulp, or seeds).