Insights into Land Plant Evolution Garnered from the Marchantia polymorpha Genome

John L. Bowman, Takayuki Kohchi, Katsuyuki T. Yamato, Jerry Jenkins, Shengqiang Shu, Kimitsune Ishizaki, Shohei Yamaoka, Ryuichi Nishihama, Yasukazu Nakamura, Frédéric Berger, Catherine Adam, Shiori Sugamata Aki (+101 others)
2017 Cell  
Graphical Abstract Highlights d First genome sequence of a liverwort, a basal lineage of land plants d Marchantia genome content retains aspects of the genome of the ancestral land plant d Evolution of haploid sex chromosomes in a haploid dominant dioecious plant d F-box-mediated hormone signaling pathways evolved with origin of land plants In Brief The genome of the liverwort Marchantia polymorpha sheds light on the evolution of land plants. SUMMARY The evolution of land flora transformed the
more » ... errestrial environment. Land plants evolved from an ancestral charophycean alga from which they inherited developmental, biochemical, and cell biological attributes. Additional biochemical and physiological adaptations to land, and a life cycle with an alternation between multicellular haploid and diploid generations that facilitated efficient dispersal of desiccation tolerant spores, evolved in the ancestral land plant. We analyzed the genome of the liverwort Marchantia polymorpha, a member of a basal land plant lineage. Relative to charophycean algae, land plant genomes are characterized by genes encoding novel biochemical pathways, new phytohormone signaling pathways (notably auxin), expanded repertoires of signaling pathways, and increased diversity in some transcription factor families. Compared with other sequenced land plants, M. polymorpha exhibits low genetic redundancy in most regulatory pathways, with this portion of its genome resembling that predicted for the ancestral land plant.
doi:10.1016/j.cell.2017.09.030 pmid:28985561 fatcat:ihz4ylqelfeylp37d7mktbxt24