Fig. 1

Score plots from principal components analysis (PCA). PCA was applied to a qRT-PCR, b microarray and c GC-MS metabolite profiling data sets. Plants were non-acclimated (black) or cold acclimated at 4 °C for 3 days (red). Cold acclimated plants were then deacclimated at 20 °C for 2 h (blue), 4 h (green), 6 h (orange), 12 h (brown) or 24 h (grey)