GO_slim analysis of functional categories up- and down-regulated in each nutrient-limitation and detected at the (a) transcript and (b) protein levels. Colours indicate the significance of the association of the given GO term with up- (red) or down- (green) regulation in a given nutrient-limitation relative to the other three. Value in the colour key is defined as -log.10(P) for up-regulated terms, and log.10(P) for down-regulated terms. Only GO_slim categories that showed a significant nutrient effect (FDR < 0.01) were included. The dendrogram showing the relationship between the terms is calculated based on the correlation coefficient between each pair of terms followed by complete linkage hierarchical clustering.