Nebraska Food for Health Center, Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, NE, USA.
Zhejiang Lab, Hangzhou, China.
Nat Genet. 2024 May;56(5):1018-1031. doi: 10.1038/s41588-024-01737-3. Epub 2024 May 1.
Zygnematophyceae are the algal sisters of land plants. Here we sequenced four genomes of filamentous Zygnematophyceae, including chromosome-scale assemblies for three strains of Zygnema circumcarinatum. We inferred traits in the ancestor of Zygnematophyceae and land plants that might have ushered in the conquest of land by plants: expanded genes for signaling cascades, environmental response, and multicellular growth. Zygnematophyceae and land plants share all the major enzymes for cell wall synthesis and remodifications, and gene gains shaped this toolkit. Co-expression network analyses uncover gene cohorts that unite environmental signaling with multicellular developmental programs. Our data shed light on a molecular chassis that balances environmental response and growth modulation across more than 600 million years of streptophyte evolution.
织线藻是陆地植物的藻类姊妹群。在这里，我们对四种丝状织线藻的基因组进行了测序，包括三种轮藻属近环藻的染色体级别的组装。我们推断了织线藻和陆地植物祖先中可能引领植物征服陆地的特征：信号级联、环境响应和多细胞生长的扩展基因。织线藻和陆地植物共享用于细胞壁合成和重塑的所有主要酶，基因增益塑造了这个工具包。共表达网络分析揭示了将环境信号与多细胞发育程序结合在一起的基因簇。我们的数据揭示了一个分子底盘，它在超过 6 亿年的石松类植物进化过程中平衡了环境响应和生长调节。
