| Autor: |
Jong Im Kim, Hyunmoon Shin, Pavel Škaloud, Jaehee Jung, Hwan Su Yoon, John M. Archibald, Woongghi Shin |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
BMC Evolutionary Biology, Vol 19, Iss 1, Pp 1-13 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
1471-2148 |
| DOI: |
10.1186/s12862-018-1316-9 |
| Popis: |
Abstract Background The Synurophyceae is one of most important photosynthetic stramenopile algal lineages in freshwater ecosystems. They are characterized by siliceous scales covering the cell or colony surface and possess plastids of red-algal secondary or tertiary endosymbiotic origin. Despite their ecological and evolutionary significance, the relationships amongst extant Synurophyceae are unclear, as is their relationship to most other stramenopiles. Results Here we report a comparative analysis of plastid genomes sequenced from five representative synurophycean algae. Most of these plastid genomes are highly conserved with respect to genome structure and coding capacity, with the exception of gene re-arrangements and partial duplications at the boundary of the inverted repeat and single-copy regions. Several lineage-specific gene loss/gain events and intron insertions were detected (e.g., cemA, dnaB, syfB, and trnL). Conclusions Unexpectedly, the cemA gene of Synurophyceae shows a strong relationship with sequences from members of the green-algal lineage, suggesting the occurrence of a lateral gene transfer event. Using a molecular clock approach based on silica fossil record data, we infer the timing of genome re-arrangement and gene gain/loss events in the plastid genomes of Synurophyceae. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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