The Penium margaritaceum Genome: Hallmarks of the Origins of Land Plants.,Cell

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The Penium margaritaceum Genome: Hallmarks of the Origins of Land Plants.
Cell ( IF 45.5 ) Pub Date : 2020-05-21 , DOI: 10.1016/j.cell.2020.04.019
Chen Jiao ₁ , Iben Sørensen ₂ , Xuepeng Sun ₁ , Honghe Sun ₁ , Hila Behar ₃ , Saleh Alseekh ₄ , Glenn Philippe ₂ , Kattia Palacio Lopez ₅ , Li Sun ₅ , Reagan Reed ₅ , Susan Jeon ₅ , Reiko Kiyonami ₆ , Sheng Zhang ₇ , Alisdair R Fernie ₄ , Harry Brumer ₈ , David S Domozych ₅ , Zhangjun Fei ₉ , Jocelyn K C Rose ₂

Affiliation

Boyce Thompson Institute, Ithaca, NY, USA.
Plant Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, USA.
Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, BC V6T 1Z4, Canada; Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Life Sciences Centre, Vancouver, BC V6T 1Z3, Canada.
Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany; Center of Plant Systems Biology and Biotechnology, 4000 Plovdiv, Bulgaria.
Skidmore College, Saratoga Springs, NY, USA.
Thermo Fisher Scientific, 355 River Oaks Parkway, San Jose, CA, USA.
Institute of Biotechnology, Cornell University, Ithaca, NY, USA.
Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, BC V6T 1Z4, Canada; Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Life Sciences Centre, Vancouver, BC V6T 1Z3, Canada; Department of Botany, University of British Columbia, 3200-6270 University Blvd., Vancouver, BC V6H 1Z4, Canada; Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z4, Canada.
Boyce Thompson Institute, Ithaca, NY, USA; U.S. Department of Agriculture-Agricultural Research Service, Robert W. Holley Center for Agriculture and Health, Ithaca, NY, USA.

The evolutionary features and molecular innovations that enabled plants to first colonize land are not well understood. Here, insights are provided through our report of the genome sequence of the unicellular alga Penium margaritaceum, a member of the Zygnematophyceae, the sister lineage to land plants. The genome has a high proportion of repeat sequences that are associated with massive segmental gene duplications, likely facilitating neofunctionalization. Compared with representatives of earlier diverging algal lineages, P. margaritaceum has expanded repertoires of gene families, signaling networks, and adaptive responses that highlight the evolutionary trajectory toward terrestrialization. These encompass a broad range of physiological processes and protective cellular features, such as flavonoid compounds and large families of modifying enzymes involved in cell wall biosynthesis, assembly, and remodeling. Transcriptome profiling further elucidated adaptations, responses, and selective pressures associated with the semi-terrestrial ecosystems of P. margaritaceum, where a simple body plan would be an advantage.

中文翻译：

玛格丽特酒青霉基因组：陆地植物起源的标志。

使植物能够首先在土地上定殖的进化特征和分子创新尚不清楚。在这里，通过我们对单细胞藻类玛格丽塔酒菌（Zygnematophyceae的成员）的单种藻类的基因组序列的报告提供了见识，该植物是陆地植物的姐妹谱系。该基因组具有与大量节段基因重复相关的重复序列的比例很高，可能促进了新功能化。与早期不同的藻类谱系的代表相比，玛格丽特体育扩大了基因家族，信号网络和适应性反应的种类，这些都突出了向陆地化的进化轨迹。这些涵盖了广泛的生理过程和保护性细胞特征，例如类黄酮化合物和参与细胞壁生物合成，组装和重塑的大量修饰酶家族。转录组分析进一步阐明了与玛格丽特疟原虫的半陆生生态系统相关的适应，反应和选择性压力，其中简单的身体计划将是一个优势。

更新日期：2020-05-21

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