Fig. 2

Number of unique ABC transporter gene members distributed over plant taxa inferred from RNA-Seq transcriptome data. a Box and whisker plot of subfamily ABC transporter unique genes among each set of samples in indicated plant groups: Chromista, rhodophytes, glaucophytes, charophytes, chlorophytes, hornworts, liverworts, mosses, lycophytes, ferns, conifers, and anigosperms. b ABCB transporter gene members. c ABCC transporter gene members. d ABCG transporter gene members. e ABCD transporter gene members. f ABCE transporter gene members. g ABCI transporter gene members. h ABCF transporter gene members. i ABCA transporter gene members. Classifications are based on hmmscan searches for the PF00005 pfam domain. Significant differences between unique gene counts of the twelve groups were determined by a comparison of means using the Wilcoxon method. Filled circles indicate outliers. The total samples per plant group are indicated in parentheses beside each label along the x-axis. Statistical differences are indicated by letter groupings (p < 0.005)