Figure 2

Transcripts affected by sucrose treatment in Arabidopsis seedlings in the light and in the dark. A) Plot showing the distribution of expression changes in response to sucrose in the light (x-axis) and dark (y-axis) compared to the corresponding controls. Numbers of genes significantly changed in expression are marked for the different conditions. Purple, blue, and orange dots mark genes affected only in the dark, only in the light, or under both conditions, respectively. B) Selected mapman categories of genes up- or down-regulated after sucrose treatment in the light or in the dark. Categories marked with an asterisk contain GO terms found significantly enriched in a topGO analysis. Repressed by sucrose in the light: GO:0015979: photosynthesis (p < 1e-30), GO:0006098: pentose-phosphate shunt (2.2e-20), GO:0019252: starch biosynthetic process (4.7e-11), GO:0000023: maltose metabolic process (5.1e-11). Repressed by sucrose in the dark: GO:0015979: photosynthesis (<1e-30), GO:0006098: pentose-phosphate shunt (1.3e-20), GO:0019252: starch biosynthetic process (6.4e-18),GO:0005984: disaccharide metabolic process (6.5e-10). Induced by sucrose in the light: GO:0006412: translation (2.0e-16), GO:0042254: ribosome biogenesis (6.9e-28), GO:0001510: RNA methylation (<1e-30). Induced by sucrose in the dark: e.g. GO:0010200: response to chitin (<1e-30), GO:0000165: MAPK cascade (<1e-30), GO:0009408: response to heat (<1e-30), GO:0009611: response to wounding (<1e-30), GO:0009723: response to ethylene stimulus (<1e-30).