Directed Repeats Co-occur with Few Short-Dispersed Repeats in Plastid Genome of a Spikemoss, Selaginella vardei (Selaginellaceae, Lycopodiopsida)
文献类型：期刊论文
| 作者 | Zhang, Hong-Rui; Zhang, Xian-Chun ; Xiang, Qiao-Ping
|
| 刊名 | BMC GENOMICS
 |
| 出版日期 | 2019 |
| 卷号 | 20 |
| 关键词 | direct repeat inversion inverted repeat plastome evolution short dispersed repeats |
| ISSN号 | 1471-2164 |
| DOI | 10.1186/s12864-019-5843-6 |
| 文献子类 | Article |
| 英文摘要 | BackgroundIt is hypothesized that the highly conserved inverted repeats (IR) structure of land plant plastid genomes (plastomes) is beneficial for stabilizing plastome organization, whereas the mechanism of the occurrence and stability maintenance of the recently reported direct repeats (DR) structure is yet awaiting further exploration. Here we describe the DR structure of the Selaginella vardei (Selaginellaceae) plastome, to elucidate the mechanism of DR occurrence and stability maintenance.ResultsThe plastome of S. vardei is 121,254 bp in length and encodes 76 genes, of which 62 encode proteins, 10 encode tRNAs, and four encode rRNAs. Unexpectedly, the two identical rRNA gene regions (13,893 bp) are arranged in a direct orientation (DR), rather than inverted. Comparing to the IR organization in Isoetes flaccida (Isoetaceae, Lycopodiopsida) plastome, a ca. 50-kb trnN-trnF inversion that spans one DR copy was found in the plastome of S. vardei, which might cause the orientation change. In addition, we find extremely rare short dispersed repeats (SDRs) in the plastomes of S. vardei and its closely related species S. indica.ConclusionsWe suggest that the ca. 50-kb inversion resulted in the DR structure, and the reduction in SDRs plays a key role in maintaining the stability of plastomes with DR structure by avoiding potential secondary recombination. We further confirmed the presence of homologous recombination between DR regions, which are able to generate subgenomes and form diverse multimers. Our study deepens the understanding of Selaginella plastomes and provides new insights into the diverse plastome structures in land plants. |
| 学科主题 | Biotechnology & Applied Microbiology ; Genetics & Heredity |
| 出版地 | LONDON |
| WOS关键词 | TRANSFER-RNA GENES ; CHLOROPLAST GENOME ; INVERTED REPEAT ; SEQUENCE ; DNA ; REARRANGEMENTS ; RECOMBINATION ; LYCOPHYTE ; ORGANIZATION ; ARCHITECTURE |
| WOS研究方向 | Biotechnology & Applied Microbiology ; Genetics & Heredity |
| 语种 | 英语 |
| WOS记录号 | WOS:000472091700006 |
| 出版者 | BMC |
| 资助机构 | National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [31670205, 31770237] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/19856]  |
| 专题 | 植物研究所_系统与进化植物学研究中心_系统与进化植物学研究中心_学位论文 |
| 作者单位 | 1.[Zhang, Hong-Rui 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China 4.Zhang, Xian-Chun |
| 推荐引用方式 GB/T 7714 | Zhang, Hong-Rui,Zhang, Xian-Chun,Xiang, Qiao-Ping. Directed Repeats Co-occur with Few Short-Dispersed Repeats in Plastid Genome of a Spikemoss, Selaginella vardei (Selaginellaceae, Lycopodiopsida)[J]. BMC GENOMICS,2019,20. |
| APA | Zhang, Hong-Rui,Zhang, Xian-Chun,&Xiang, Qiao-Ping.(2019).Directed Repeats Co-occur with Few Short-Dispersed Repeats in Plastid Genome of a Spikemoss, Selaginella vardei (Selaginellaceae, Lycopodiopsida).BMC GENOMICS,20. |
| MLA | Zhang, Hong-Rui,et al."Directed Repeats Co-occur with Few Short-Dispersed Repeats in Plastid Genome of a Spikemoss, Selaginella vardei (Selaginellaceae, Lycopodiopsida)".BMC GENOMICS 20(2019). |
入库方式： OAI收割
来源：植物研究所
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