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| Plastome of the mycoheterotrophic eudicot Exacum paucisquama (Gentianaceae) exhibits extensive gene loss and a highly expanded inverted repeat region | |
Li, Zhanghai; Ma, Xiao; Wen, Yi1; Chen, Sisi2; Jiang, Yan1; Jin, Xiaohua3
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| 2020 | |
| Source Publication | PEERJ
 |
| ISSN | 2167-8359 |
| Volume | 8 |
| Abstract | Mycoheterotrophic plants are highly specialized species able to acquire organic carbon from symbiotic fungi, with relaxed dependence on photosynthesis for carbon fixation. The relaxation of the functional constraint of photosynthesis and thereby the relaxed selective pressure on functional photosynthetic genes usually lead to substantial gene loss and a highly degraded plastid genome in heterotrophs. In this study, we sequenced and analyzed the plastome of the eudicot Exacum paucisquama, providing the first plastid genome of a mycoheterotroph in the family Gentianaceae to date. The E. paucisquama plastome was 44,028 bp in length, which is much smaller than the plastomes of autotrophic eudicots. Although the E. paucisquama plastome had a quadripartite structure, a distinct boundary shift was observed in comparison with the plastomes of other eudicots. We detected extensive gene loss and only 21 putative functional genes (15 protein-coding genes, four rRNA genes and two tRNA genes). Our results provide valuable information for comparative evolutionary analyses of plastomes of heterotrophic species belonging to different phylogenetic groups. |
| Keyword | Mycoheterotrophy Exacum paucisquama Gentianaceae Plastid genome Gene loss Inverted repeat region expansion |
| Subject Area | Multidisciplinary Sciences |
| DOI | 10.7717/peerj.9157 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | GLUTAMYL-TRANSFER-RNA ; CHLOROPLAST ; GENOME ; IDENTIFICATION ; REDUCTION ; EVOLUTION ; SEQUENCE ; ORCHIDS |
| WOS Research Area | Science & Technology - Other Topics |
| WOS ID | WOS:000538940800002 |
| Publisher | PEERJ INC |
| Subtype | Article |
| Publication Place | LONDON |
| Funding Organization | Biodiversity Survey, Observation and Assessment Program of Ministry of Ecology and Environment of China ; Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31870195, 31670194] ; Southeast Asia Biodiversity Research Institute, CAS [Y4ZK111B01] |
| Corresponding Author Email | xiaohuajin@ibcas.ac.cn |
| OA | Green Published, gold |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ibcas.ac.cn/handle/2S10CLM1/21726 |
| Collection | 系统与进化植物学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Nanchang Univ, Nanchang, Jiangxi, Peoples R China 4.Chinese Acad Sci CAS SEABRI, Southeast Asia Biodivers Res Inst, Xishuangbanna, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Zhanghai,Ma, Xiao,Wen, Yi,et al. Plastome of the mycoheterotrophic eudicot Exacum paucisquama (Gentianaceae) exhibits extensive gene loss and a highly expanded inverted repeat region[J]. PEERJ,2020,8. |
| APA | Li, Zhanghai,Ma, Xiao,Wen, Yi,Chen, Sisi,Jiang, Yan,&Jin, Xiaohua.(2020).Plastome of the mycoheterotrophic eudicot Exacum paucisquama (Gentianaceae) exhibits extensive gene loss and a highly expanded inverted repeat region.PEERJ,8. |
| MLA | Li, Zhanghai,et al."Plastome of the mycoheterotrophic eudicot Exacum paucisquama (Gentianaceae) exhibits extensive gene loss and a highly expanded inverted repeat region".PEERJ 8(2020). |
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| File Name/Size | DocType | Version | Access | License | ||
| Li-2020-Plastome of （4704KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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