Fig. 4From: airpg: automatically accessing the inverted repeats of archived plastid genomesFrequencies of plastid genomes of flowering plants with and without complete and equal-length IR annotations in relation to a release year, b publication status, and c record version number. Different gray shades highlight the presence (light gray) or absence (dark gray) of complete and equal-length IR annotations. In (a), annual frequencies between 2013 and 2020 are givenBack to article page