Fig. 2: Concerted expansion and contraction of cell-surface and intracellular immune receptor genes in plant genomes.

a,b, Correlation between %NB-ARC and %LRR-RLKs and %PRRs in 300 angiosperms. Bar chart represents the Pearson correlation coefficient, with significant values indicated with asterisks. Two-sided test of significance was performed, and Bonferroni correction was performed to adjust the P value for the multiple independent tests performed (Extended Data Fig. 6). Summary of statistical analyses and individual P values are provided in Supplementary Table 4. c, Scatter plot of %LRR-RLP + LRR-RLK-XII against %NB-ARC. Black line represents the linear trend, with dark-grey shade representing the 95% confidence interval and light-grey shade representing the 95% prediction interval. Several parasitic species, carnivorous species, aquatic species and trees are indicated as yellow inverted triangles, orange stars, blue circles and brown pentagons, respectively. Model organisms are also indicated as spheres of different colours. d, Schematic illustration of the co-expansion and co-contraction of immune receptors in plant genomes.