Insights into Land Plant Evolution Garnered from the Marchantia polymorpha Genome
Insights into Land Plant Evolution Garnered from the Marchantia polymorpha Genome
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DOI：
10.1016/j.cell.2017.09.030
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发表时间：
2017-10-05
期刊：
影响因子：
64.5
通讯作者：
Schmutz, Jeremy
中科院分区：
文献类型：
--
作者：
Bowman, John L.;Kohchi, Takayuki;Schmutz, Jeremy
陆地植物区系的演变改变了陆地环境。陆地植物从一种原始的轮藻进化而来，它们从这种藻类继承了发育、生化和细胞生物学特性。对陆地的额外生化和生理适应，以及在多细胞单倍体和二倍体世代之间交替的生活史，促进了耐脱水孢子的有效传播，在祖先的陆地植物中进化出来。我们分析了多形地钱的基因组，它是陆生植物谱系中的一个成员。相对于轮藻，陆地植物基因组的特点是编码新的生化途径、新的植物激素信号通路(特别是生长素)、扩大的信号通路以及一些转录因子家族的多样性。与其他已测序的陆地植物相比，多态丛枝杆菌在大多数调控途径中表现出较低的遗传冗余度，其基因组的这一部分与预测的祖先陆地植物相似。
The evolution of land flora transformed the terrestrial 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.