Academic Journal
Organellar genome comparisons of Sargassum polycystum and S. plagiophyllum (Fucales, Phaeophyceae) with other Sargassum species
| Title: | Organellar genome comparisons of Sargassum polycystum and S. plagiophyllum (Fucales, Phaeophyceae) with other Sargassum species |
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| Authors: | Shuangshuang Zhang, Yanshuo Liang, Jie Zhang, Stefano G. A. Draisma, Delin Duan |
| Source: | BMC Genomics, Vol 23, Iss 1, Pp 1-12 (2022) |
| Publisher Information: | BMC, 2022. |
| Publication Year: | 2022 |
| Collection: | LCC:Biotechnology LCC:Genetics |
| Subject Terms: | Sargassum polycystum, Sargassum plagiophyllum, Mitochondrial genome, Chloroplast genome, Phylogeny, Biotechnology, TP248.13-248.65, Genetics, QH426-470 |
| More Details: | Abstract Background Sargassum polycystum C. Agardh and Sargassum plagiophyllum C. Agardh are inhabitants of tropical coastal areas, their populations are negatively influenced by global warming and marine environment changes. The mitochondrial and chloroplast genomes of these species have not been sequenced. Results The mitochondrial genomes of S. polycystum and S. plagiophyllum were 34,825 bp and 34,862 bp, respectively, and their corresponding chloroplast genomes were 124,493 bp and 124,536 bp, respectively. The mitochondrial and chloroplast genomes of these species share conserved synteny, sequence regions and gene number when compared with the organellar genomes of other Sargassum species. Based on sequence analysis of 35 protein-coding genes, we deduced that S. polycystum and S. plagiophyllum were closely related with S. ilicifolium; these species diverged approximately 0.3 million years ago (Ma; 0.1–0.53 Ma) during the Pleistocene period (0.01–2.59 Ma). Rates of synonymous and non-synonymous substitutions in the mitochondrial genome of the Sargassum genus were 3 times higher than those in the chloroplast genome. In the mitochondrial genome, rpl5, rpl31 and rps11 had the highest synonymous substitution rates. In the chloroplast genome, psaE, rpl14 and rpl27 had the highest synonymous substitution rates. Conclusions Phylogenetic analysis confirms the close relationship between the two sequenced species and S. ilicifolium. Both synonymous and non-synonymous substitution rates show significant divergence between the group of mitochondrial genomes versus the group of chloroplast genomes. The deciphering of complete mitochondrial and chloroplast genomes is significant as it advances our understanding of the evolutionary and phylogenetic relationships between species of brown seaweeds. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 1471-2164 |
| Relation: | https://doaj.org/toc/1471-2164 |
| DOI: | 10.1186/s12864-022-08862-5 |
| Access URL: | https://doaj.org/article/2986429b079349f7b356e4b8724e8cc5 |
| Accession Number: | edsdoj.2986429b079349f7b356e4b8724e8cc5 |
| Database: | Directory of Open Access Journals |
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| ISSN: | 14712164 |
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| DOI: | 10.1186/s12864-022-08862-5 |
| Published in: | BMC Genomics |
| Language: | English |