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Genomes of Subaerial Zygnematophyceae Provide Insights into Land Plant Evolution.
Cell ( IF 45.5 ) Pub Date : 2019-11-14 , DOI: 10.1016/j.cell.2019.10.019
Shifeng Cheng 1 , Wenfei Xian 1 , Yuan Fu 1 , Birger Marin 2 , Jean Keller 3 , Tian Wu 4 , Wenjing Sun 4 , Xiuli Li 1 , Yan Xu 4 , Yu Zhang 1 , Sebastian Wittek 2 , Tanja Reder 2 , Gerd Günther 5 , Andrey Gontcharov 6 , Sibo Wang 4 , Linzhou Li 4 , Xin Liu 4 , Jian Wang 4 , Huanming Yang 4 , Xun Xu 4 , Pierre-Marc Delaux 3 , Barbara Melkonian 2 , Gane Ka-Shu Wong 7 , Michael Melkonian 2
Affiliation  

The transition to a terrestrial environment, termed terrestrialization, is generally regarded as a pivotal event in the evolution and diversification of the land plant flora that changed the surface of our planet. Through phylogenomic studies, a group of streptophyte algae, the Zygnematophyceae, have recently been recognized as the likely sister group to land plants (embryophytes). Here, we report genome sequences and analyses of two early diverging Zygnematophyceae (Spirogloea muscicola gen. nov. and Mesotaenium endlicherianum) that share the same subaerial/terrestrial habitat with the earliest-diverging embryophytes, the bryophytes. We provide evidence that genes (i.e., GRAS and PYR/PYL/RCAR) that increase resistance to biotic and abiotic stresses in land plants, in particular desiccation, originated or expanded in the common ancestor of Zygnematophyceae and embryophytes, and were gained by horizontal gene transfer (HGT) from soil bacteria. These two Zygnematophyceae genomes represent a cornerstone for future studies to understand the underlying molecular mechanism and process of plant terrestrialization.

中文翻译:

空中植物纸藻科的基因组为陆地植物的进化提供了见识。

向陆地环境的过渡(称为陆地化)通常被认为是改变了地球表面的陆地植物区系的进化和多样化的关键事件。通过系统生物学研究,最近发现一群链霉菌藻类(Zygnematophyceae)是可能的陆地植物姐妹植物(胚藻)。在这里,我们报告基因组序列,并分析了两个早期散布的Zygnematophyceae(螺螺旋藻属gen。nov。和Mesotaenium endlicherianum),它们与最早散布的胚状植物苔藓植物共享相同的陆上/陆地生境。我们提供的证据表明,基因(即GRAS和PYR / PYL / RCAR)可以增加陆地植物对生物和非生物胁迫(特别是干燥)的抗性,起源于或扩展于Zygnematophyceae和胚胎植物的共同祖先,并通过土壤细菌的水平基因转移(HGT)获得。这两个植物志藻科的基因组为将来的研究奠定了基石,以了解植物地特异化的潜在分子机制和过程。
更新日期:2019-11-14
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