Fig. 7.

Weighted gene correlation network analysis (WGCNA) signed metabolic network of ‘d’Anjou’ pear peel. Pears were harvested from different tree positions and stored in controlled atmosphere for up to 8 months. Highlighted compounds include identified and tentatively identified flavonol glycosides, hydroxy- and methoxycinnamic acids and conjugates, and arbutin (Table 2; Additional file 2: Table S2). Metabolites residing in the yellow module were found in higher concentrations in peel of ‘d’Anjou’ pears grown on external than internal positions of the tree canopy