Figure 2.

Genes differentially expressed in response to competition. Arabidopsis plants were either grown alone (a) or at a density of 20 plants (b) in hydroponic conditions in pots containing baked clay beads. Arabidopsis whole-genome microarrays were used to analyze the effect of competition on gene expression. Number of genes differentially regulated by competition in leaves and roots are presented (c). Venn diagram (d) gives the number of overlapping and non-overlapping differentially expressed genes. ↑, induced genes; ↓, repressed genes. All selected genes have an expression ratio ≥1.5 or ≤0.67 and a FDR <0.1.