Fig. 4.

Venn-diagram (a) and heatmap (b) of genes with differential expression under pH treatment. Differential expression was assessed using quasi-likelihood F-test. Four coefficients were determined using each species (Vaccinium arboreum and V. corymbosum) as a group and each pH condition (4.5 and 6.5) as sub-group. a The contrasts show genes responding to higher pH in each species (red circle for VA and striped circle for VC) and those responding differently between species (empty circle). The figure was produced using eulerAPE [89]. b Heatmap representation of fold change of the overlapping subset of differentially expressed genes between VA and VC