Figure 6

Conservation ratios of potentially AM-related proteins averaged for relevant plant groups with significant difference between non-AM and AM species. Histograms represent the frequency distributions of the ratios of log10 of the E-values from psi-blast. The query sequences for psi-blast were generated by calculating MSA consensus sequences based on the results of Task3. These query sequences were blasted against AM-competent dicot species (group A), monocot species (group B), and non-mycorrhizal dicot species (group C) (compare with Additional file 12: Table S4). To derive conservation ratios, the E-values were averaged group-wise for groups A, B, and C, respectively, and the following ratios were generated: C/A and C/B. Conservation ratios were included only if the difference between the groups were significant (p < 0.05 for Wilcoxon test, compare with Additional file 12: Table S4). (a) Ratios for log10(group C)/log10(group A). (b) Ratios for log10(group C)/log10(group B). Note that 8 control genes from Additional file 5: Table S1 passed the filter in (a), whereas none passed in (b).