The Unique Evolutionary Trajectory and Dynamic Conformations of DR and IR/DR-Coexisting Plastomes of the Early Vascular Plant Selaginellaceae (Lycophyte)
文献类型：期刊论文
| 作者 | Zhang, Hong-Rui; Xiang, Qiao-Ping; Zhang, Xian-Chun
|
| 刊名 | GENOME BIOLOGY AND EVOLUTION
 |
| 出版日期 | 2019 |
| 卷号 | 11期号:4页码:1258-1274 |
| 关键词 | gene loss homologous recombination DR/IR evolution Selaginella substitution rate time divergence |
| ISSN号 | 1759-6653 |
| DOI | 10.1093/gbe/evz073 |
| 文献子类 | Article |
| 英文摘要 | Both direct repeats (DR) and inverted repeats (IR) are documented in the published plastomes of Selaginella species indicating the unusual and diverse plastome structure in the family Selaginellaceae. In this study, we newly sequenced complete plastomes of seven species from five main lineages of Selaginellaceae and also resequenced three species (Selaginella tamariscina, Selaginella uncinata, and Selaginella moellendorffii) to explore the evolutionary trajectory of Selaginellaceae plastomes. Our results showed that the plastomes of Selaginellaceae vary remarkably in size, gene contents, gene order, and GC contents. Notably, both DR and IR structures existed in the plastomes of Selaginellaceae with DR structure being an ancestral state. The occurrence of DR structure was at similar to 257 Ma and remained in most subgenera of Selaginellaceae, whereas IR structure only reoccurred in Selaginella sect. Lepidophyllae (similar to 143 Ma) and Selaginella subg. Heterostachys (similar to 19 Ma). The presence of a pair of large repeats psbK-trnQ, together with DR/IR region in Selaginella bisulcata, Selaginella pennata, S. uncinata, and Selaginella hainanensis, could frequently mediate diverse homologous recombination and create approximately equal stoichiometric isomers (IR/DR-coexisting) and subgenomes. High proportion of repeats is presumably responsible for the dynamic IR/DR-coexisting plastomes, which possess a lower synonymous substitution rate (dS) compared with DR-possessing and IR-possessing plastomes. We propose that the occurrence of DR structure, together with few repeats, is possibly selected to keep the stability of plastomes and the IR/DR-coexisting plastomes also reached an equilibrium in plastome organization through highly efficient homologous recombination to maintain stability. |
| 学科主题 | Evolutionary Biology ; Genetics & Heredity |
| 出版地 | OXFORD |
| WOS关键词 | TRANSFER-RNA GENES ; CHLOROPLAST GENOME ; PLASTID GENOME ; NDH GENES ; REPEAT SEQUENCES ; INVERTED REPEAT ; TRNASCAN-SE ; REARRANGEMENTS ; RECOMBINATION ; EXTREME |
| WOS研究方向 | Evolutionary Biology ; Genetics & Heredity |
| 语种 | 英语 |
| WOS记录号 | WOS:000476569800021 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31670205, 31770237] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/19873]  |
| 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.Xiang, Qiao-Ping 2.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing, Peoples R China 3.[Zhang, Hong-Rui 4.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Hong-Rui,Xiang, Qiao-Ping,Zhang, Xian-Chun. The Unique Evolutionary Trajectory and Dynamic Conformations of DR and IR/DR-Coexisting Plastomes of the Early Vascular Plant Selaginellaceae (Lycophyte)[J]. GENOME BIOLOGY AND EVOLUTION,2019,11(4):1258-1274. |
| APA | Zhang, Hong-Rui,Xiang, Qiao-Ping,&Zhang, Xian-Chun.(2019).The Unique Evolutionary Trajectory and Dynamic Conformations of DR and IR/DR-Coexisting Plastomes of the Early Vascular Plant Selaginellaceae (Lycophyte).GENOME BIOLOGY AND EVOLUTION,11(4),1258-1274. |
| MLA | Zhang, Hong-Rui,et al."The Unique Evolutionary Trajectory and Dynamic Conformations of DR and IR/DR-Coexisting Plastomes of the Early Vascular Plant Selaginellaceae (Lycophyte)".GENOME BIOLOGY AND EVOLUTION 11.4(2019):1258-1274. |
入库方式： OAI收割
来源：植物研究所
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