Figure 1. Regulation of CK metabolism genes by different environmental cues. The changes in transcript abundance of the CK metabolism genes in response to different environmental cues or stresses were established with the Genevestigator database¹¹ (http://www.genevestigator.com/gv/index.jsp) and modified. The figure shows an arbitrary selection of experiments according to criteria outlined in the text. The gene expression responses were calculated as log₂-ratios between the signal intensities from different stress or nutritional treatments compared with control or mock-treated samples. The resulting heatmap is color-coded as indicated and thus reflects the up- (red color) or downregulation (green color) of genes. The individual experiments are available from various repositories, such as Gene Expression Omnibus²⁵ or ArrayExpress²⁶ and can be retrieved by using their unique ID. Note that a probe for CKX7 is not present on the Affymetrix ATH1 chip. Abbreviations: d, days; vs., versus; Lz, longitudinal zone; Ws, Wassileskija; Col-4, Columbia-4.