Fig. 2.

—Comparisons of plastid ACCD among the gymnosperms. The lengths of ACCD amino acid sequences were deduced from the plastid genes or transcriptomes of gymnosperms. Each group is coded by a specific color, as depicted in the legend. AccD is absent from the plastomes of Sciadopitys and gnetophytes. See supplementary table S2, Supplementary Material online, for a complete list of sampled species and their accession numbers. Asterisks (*) denote the sequences that were derived only from transcriptomes (i.e., no plastome available). Phylogenetic relationships between the groups were derived from Li et al. (2017). Taxa., Taxaceae; Sci., Sciadopityaceae; Ara., Araucariaceae; Podo., Podocarpaceae; gne., gnetophytes; and gink., ginkgo.