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| The extremely reduced, diverged and reconfigured plastomes of the largest mycoheterotrophic orchid lineage | |
Wen, Yingying1; Qin, Ying2; Shao, Bingyi; Li, Jianwu3; Ma, Chongbo; Liu, Yan2; Yang, Boyun1; Jin, Xiaohua
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| 2022 | |
| 发表期刊 | BMC PLANT BIOLOGY
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| ISSN | 1471-2229 |
| 卷号 | 22期号:1 |
| 摘要 | Background Plastomes of heterotrophic plants have been greatly altered in structure and gene content, owing to the relaxation of selection on photosynthesis-related genes. The orchid tribe Gastrodieae is the largest and probably the oldest mycoheterotrophic clade of the extant family Orchidaceae. To characterize plastome evolution across members of this key important mycoheterotrophic lineage, we sequenced and analyzed the plastomes of eleven Gastrodieae members, including representative species of two genera, as well as members of the sister group Nervilieae. Results The plastomes of Gastrodieae members contain 20 protein-coding, four rRNA and five tRNA genes. Evolutionary analysis indicated that all rrn genes were transferred laterally and together, forming an rrn block in the plastomes of Gastrodieae. The plastome GC content of Gastrodia species ranged from 23.10% (G. flexistyla) to 25.79% (G. javanica). The plastome of Didymoplexis pallens contains two copies each of ycf1 and ycf2. The synonymous and nonsynonymous substitution rates were very high in the plastomes of Gastrodieae among mycoheterotrophic species in Orchidaceae and varied between genes. Conclusions The plastomes of Gastrodieae are greatly reduced and characterized by low GC content, rrn block formation, lineage-specific reconfiguration and gene content, which might be positively selected. Overall, the plastomes of Gastrodieae not only serve as an excellent model for illustrating the evolution of plastomes but also provide new insights into plastome evolution in parasitic plants. |
| 关键词 | Gastrodieae Didymoplexis Plastomes GC contents ycf1 Substitution rates |
| 学科领域 | Plant Sciences |
| DOI | 10.1186/s12870-022-03836-x |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | PLASTID GENOME ; PHYLOGENETIC ANALYSIS ; EPIDENDROIDEAE ; GASTRODIEAE ; EVOLUTION ; SEQUENCE ; SELECTION ; SOFTWARE ; TRIBE |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| WOS记录号 | WOS:000855443800001 |
| 出版者 | BMC |
| 文献子类 | Article |
| 出版地 | LONDON |
| 资助机构 | National Natural Science Foundation of China [31870195, 32160050] |
| 作者邮箱 | gxibly@163.com ; yangboyun@163.com ; xiaohuajin@ibcas.ac.cn |
| 作品OA属性 | Green Published, gold |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/28731 |
| 专题 | 系统与进化植物学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China 2.Nanchang Univ, Sch Life Sci, Nanchang 330031, Jiangxi, Peoples R China 3.Guangxi Zhuang Autonomous Reg & Chinese Acad Sci, Guangxi Inst Bot, Guilin 541006, Guangxi, Peoples R China 4.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Menglun Township 666303, Yunnan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wen, Yingying,Qin, Ying,Shao, Bingyi,et al. The extremely reduced, diverged and reconfigured plastomes of the largest mycoheterotrophic orchid lineage[J]. BMC PLANT BIOLOGY,2022,22(1). |
| APA | Wen, Yingying.,Qin, Ying.,Shao, Bingyi.,Li, Jianwu.,Ma, Chongbo.,...&Jin, Xiaohua.(2022).The extremely reduced, diverged and reconfigured plastomes of the largest mycoheterotrophic orchid lineage.BMC PLANT BIOLOGY,22(1). |
| MLA | Wen, Yingying,et al."The extremely reduced, diverged and reconfigured plastomes of the largest mycoheterotrophic orchid lineage".BMC PLANT BIOLOGY 22.1(2022). |
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