Figure 6: Maximum likelihood tree based on 23 conserved protein-coding genes of 30 representative higher plant mt genomes. Numbers on each node are bootstrap support values. Marchantia polymorpha was used as outgroup. The yellow, red, blue, green, and baby blue circles represent the asterid, rosid, monocot, Gymnospermae, and Bryophyta classes, respectively. The black circle indicated G. raimondii, belonging to rosids.