Figure 3: Sequence abundance and conservation across Tracheophyta species.

Abundance of 82 conserved miRNAs across the comparative panel of plant species and organs included in this study. Heatmap colours represent absolute normalized levels of miRNA expression ranging from 0 RPM (white) to 1,000,000 RPM (dark red) as indicated in the colour keys. MiRNA families are sorted in eight groups according to the degree of conservation and enrichment in the taxonomic groups analysed. 1, ubiquitous; 2, present in most taxonomic groups; 3, poorly enriched in monocots; 4, enriched in dicots; 5, enriched in angiosperms; 6, enriched in gymnosperms; 7, enriched in monocots; 8, enriched in Solanaceae. Coloured dots indicate related miRNA families.