Figure 7: Clusters containing genes encoding photosystem II subunits.

The clusters correspond to regions of the global cluster shown in Fig. 2 (a thumbnail image of the global cluster is shown on the left to localize the clusters discussed in the text). The gene names have been colored to facilitate the visualization of genes encoding proteins for different photosynthetic complexes, with PSII in green, PSI in blue, PBS in purple, Cyt. b₆ f in orange, and other categories in black. The gene associations arose through comparison of all the samples using wild-type strains grown under different environmental perturbations. Cluster E containing psba3 and psba2 genes encoding the PSII reaction center D1 protein. Clusters F and G significantly enriched in genes encoding subunits of different photosynthetic complexes. Color bars positioned under the different contrasts indicate modification of the same environmental factor; S: Sulfate starvation, C: Carbon limitation, HL: High-intensity light, Oxidative: Oxidative stress, Cold: Low temperature, Fe: Iron limitation. Other conditions discussed in the text were trimmed for publication.