Liang Zhe, Geng Yuke, Ji Changmian, Du Hai, Wong Chui Eng, Zhang Qian, Zhang Ye, Zhang Pingxian, Riaz Adeel, Chachar Sadaruddin, Ding Yike, Wen Jing, Wu Yunwen, Wang Mingcheng, Zheng Hongkun, Wu Yanmin, Demko Viktor, Shen Lisha, Han Xiao, Zhang Pengpeng, Gu Xiaofeng, Yu Hao
Department of Biological Sciences National University of Singapore Singapore 117543 Singapore.
Biotechnology Research Institute Chinese Academy of Agricultural Sciences Beijing 100081 China.
Adv Sci (Weinh). 2019 Oct 24;7(1):1901850. doi: 10.1002/advs.201901850. eCollection 2020 Jan.
The Streptophyta include unicellular and multicellular charophyte green algae and land plants. Colonization of the terrestrial habitat by land plants is a major evolutionary event that has transformed the planet. So far, lack of genome information on unicellular charophyte algae hinders the understanding of the origin and the evolution from unicellular to multicellular life in Streptophyta. This work reports the high-quality reference genome and transcriptome of , a single-celled charophyte alga with a position at the base of Streptophyta. There are abundant segmental duplications and transposable elements in , which contribute to a relatively large genome with high gene content compared to other algae and early diverging land plants. This work identifies the origin of genetic tools that multicellular Streptophyta have inherited and key genetic innovations required for the evolution of land plants from unicellular aquatic ancestors. The findings shed light on the age-old questions of the evolution of multicellularity and the origin of land plants.
链形植物包括单细胞和多细胞轮藻绿藻以及陆地植物。陆地植物在陆地生境中的定殖是一项改变了地球的重大进化事件。到目前为止，单细胞轮藻绿藻缺乏基因组信息阻碍了对链形植物中从单细胞到多细胞生命的起源和进化的理解。这项工作报道了一种处于链形植物基部的单细胞轮藻绿藻的高质量参考基因组和转录组。该绿藻中有丰富的片段重复和转座元件，与其他藻类和早期分化的陆地植物相比，这些元件导致了一个具有高基因含量的相对较大的基因组。这项工作确定了多细胞链形植物所继承的遗传工具的起源以及陆地植物从单细胞水生祖先进化所需的关键遗传创新。这些发现为多细胞性的进化和陆地植物的起源这一古老问题提供了线索。
