Additional file 1:

Correlation analyses of editing frequency versus nucleotide composition. Table of correlations for forward (C→U) and reverse (U→C) editing frequency at 1^st, 2^nd, 3^rd, and total codon positions versus combined composition of aliphatic NUN codons (I, V, L), CRR (Q+R) codons, and ratios of compositional distance between nucleotide pairs T-A, and C-G, at 1^st, 2^nd, 3^rd, and total codon positions. Analyses were performed across 68 chloroplast protein-coding genes from Anthoceros formosae (Af), and Adiantum capillus-veneris (Acv), and 30 mitochondrial protein-coding genes from Beta vulgaris (Bv). Significant two-tailed Pearson correlations are signified by * at the 0.05 level, and ** at the 0.01 level. 'a' = cannot be computed because at least one of the variables is constant. 'na' = not applicable. Relevant data were used in Figures 4 and 5.

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Additional file 2:

Evolutionary analysis of total editing frequency across genes. Input trees used for chloroplast and mitochondrial gene specific dN and dS analyses (Figure 6) are presented. Chloroplast and mitochondrial genes used in gene specific dN and dS analyses are listed according to each analyzed taxon. Data include the dN/dS ratio, dN, dS, transition/tranversion ratio (Ti/Tv), alignment (matrix) length, and total editing frequency for each gene. Information is divided into mitochondrial and chloroplast data-sets. Soluble proteins are shown in italics.

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Additional file 3:

Taxonomic and genome information. The data provide a full description of taxon names for those abbreviated in Figure 7, along with associated GenBank numbers. Genomes used to construct input trees for gene specific dN and dS analyses (Figure 6, Additional file 2) are shown in bold.

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