Fig. 6.

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. Metabolites associated with scald risk are highlighted within the network. Highlighted metabolites include acylated steryl glycosides (ASGs; triangle), conjugated trienol (CTs; circles), and trienol acyl esters (squares) (Table 1; Additional file 2: Table S2) within the WGCNA network. Increasing levels of these classes of compounds during storage has been linked with superficial scald risk of apple fruit and was the case in pear peel in the current study