Fig. 1

Statistical analysis of comparative gene expression analysis. a Hierarchical clustering of all ATH1 datasets, including wild-type (Col-0), pdr2 and lpr1lpr2 samples, the two growth regimes (+Pi and –Pi), and three biological replicates. Distances in the dendrogram illustrate the degree of relationship between samples. Note the short distance between biological replicate sets (lowest branches) compared to the relatively long distance between + Pi and –Pi conditions. b Number of up- and downregulated genes (p ≤ 0.05, Student’s t-test; 0.66 ≥ FC ≥ 1.5) in wild-type, pdr2 and lpr1lpr2 roots upon transfer from + Pi to –Pi (−/+), and in the three genotypes under + Pi (+/+) or –Pi (−/−) conditions. c Venn diagrams illustrating the number of differentially regulated genes in pairwise comparisons for all three genotypes under both growth regimes