Figure 5.

Stress response evolution scenarios of C. reinhardtii duplicates compared to their ancestral genes. (A). There are four scenarios as indicated on the far left column. The ancestral state column shows the reconstructed ancestral response state and the extant state column shows the extant gene response state. ‘U’, ‘D’, and ‘N’ indicate up-regulated, down-regulated, and not-regulated under a stress condition, respectively. On the right, the preponderance (in percent total) of each scenario for a given stress condition is shown. The percent of each scenario for six conditions are summarized in a boxplot for each ancestral-extant combination. (B-E). Stress response evolution among C. reinhardtii paralogs using Ks as a proxy for time. X-axis indicates Ks values, and Y-axis indicates the relative frequency of each stress evolution scenario. (B). stress response retention. (C). loss. (D). gain. (E). switch.