Unit of Polar Genomics, Korea Polar Research Institute, Incheon 21990, Korea.
Department of Life Science, Sogang University, Seoul 04107, Korea.
Int J Mol Sci. 2018 Mar 1;19(3):709. doi: 10.3390/ijms19030709.
Organellar genomes of bryophytes are poorly represented with chloroplast genomes of only four mosses, four liverworts and two hornworts having been sequenced and annotated. Moreover, while Antarctic vegetation is dominated by the bryophytes, there are few reports on the plastid genomes for the Antarctic bryophytes. (Hedw.) Loeske is one of the most dominant moss species in the maritime Antarctic. It has been researched as an important marker for ecological studies and as an extremophile plant for studies on stress tolerance. Here, we report the complete plastome sequence of . , which can be exploited in comparative studies to identify the lineage-specific divergence across different species. The complete plastome of . is 124,374 bp in length with a typical quadripartite structure of 114 unique genes including 82 unique protein-coding genes, 37 tRNA genes and four rRNA genes. However, two genes encoding the subunit of RNA polymerase () and encoding the cytochrome b complex subunit VIII () were absent. We could identify nuclear genes homologous to those genes, which suggests that and might have been relocated from the chloroplast genome to the nuclear genome.
维管植物的细胞器基因组的代表性很差，只有四个藓类植物、四个地钱类植物和两个角苔类植物的叶绿体基因组被测序和注释。此外，尽管南极植物以苔藓植物为主，但有关南极苔藓植物的质体基因组的报道很少。（Hedw.）Loeske 是南极海洋中最主要的苔藓物种之一。它被研究为生态研究的重要标志物，也是研究抗逆性的极端植物。在这里，我们报告了. 的完整质体基因组序列，可用于比较研究，以识别不同物种之间的谱系特异性分化。. 的完整质体基因组长 124,374bp，具有典型的四分体结构，包含 114 个独特基因，包括 82 个独特的蛋白质编码基因、37 个 tRNA 基因和 4 个 rRNA 基因。然而，两个基因编码 RNA 聚合酶的亚基（）和编码细胞色素 b 复合物亚基 VIII（）缺失。我们可以识别与这些基因同源的核基因，这表明 和 可能已经从叶绿体基因组转移到核基因组。
