Figure 3.
Visualization of metabolite-metabolite correlations. Heatmap of metabolite-metabolite correlations along developmental period of tomato fruits (from 7–70 DAA). Metabolites were grouped by compound class, and each square represents the correlation between the metabolite heading the column with the metabolite heading the row. Correlation coefficients and significances (two tailed) were calculated by applying Spearman algorithm using SSPS software. Out of 4,232 pairs analyzed, 2,430 resulted in significant correlations (P ≤ 0.05). Each square indicates a given r value resulting from a Spearman correlation analysis in a false color scale. The Web version of this figure allows mouse-over annotation that facilitates point-by-point evaluation of the data to facilitate its detailed interrogation.