Figure 6.

Pearson correlation analysis of metabolites and morphological phenotypes. (a) Heat map of the 159 metabolites identified in maize that were significantly associated with morphological phenotypes (|r| ≥ 0.708) under Pi‐deficient conditions. The color denotes Spearman's rank correlation r between metabolite (listed on top) and trait (listed at left). Red denotes strongly positive and blue denotes strongly negative correlations. (b) Heat map of the 77 identified metabolites in maize that were associated with morphological phenotypes (|r| ≥ 0.708) under Pi‐sufficient conditions. The color denotes Spearman's rank correlation r between metabolite and trait.