Fig. 1

Plastid genome map of four Pilea species and image of the four plants. The genome has a conservative quartile structure that is composed of an LSC region, an SSC region and a pair of IR regions. The genes outside the circle are transcribed in the counterclockwise direction, and the genes inside the circle are transcribed in the clockwise direction. Different colors in genes represent different functions. The dark gray area and light gray area of the inner circle represent the ratio of GC content to AT content in the genome, respectively