Fig. 7.

Bayesian network (BN) analysis correlation heat maps. Bayesian network (BN) analysis was performed to search for strong probabilistic correlations between metabolites with respect to growth conditions and leaf position. The BN results were translated into Pearson’s correlation coefficients and are displayed as a heat map. Strong correlations were searched between metabolites within (a) the base and tip of the leaf when grown in the absence of nitrate; (b) the base and tip of the leaf when grown in the presence of nitrate; (c) the leaf tip when grown in the absence and presence of nitrate; (d) the leaf base when grown in the absence and presence of nitrate.