IB-CAS  > 系统与进化植物学国家重点实验室
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
2020
Source PublicationPEERJ
ISSN2167-8359
Volume8
AbstractMycoheterotrophic 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.
KeywordMycoheterotrophy Exacum paucisquama Gentianaceae Plastid genome Gene loss Inverted repeat region expansion
Subject AreaMultidisciplinary Sciences
DOI10.7717/peerj.9157
Indexed BySCI
Language英语
WOS KeywordGLUTAMYL-TRANSFER-RNA ; CHLOROPLAST ; GENOME ; IDENTIFICATION ; REDUCTION ; EVOLUTION ; SEQUENCE ; ORCHIDS
WOS Research AreaScience & Technology - Other Topics
WOS IDWOS:000538940800002
PublisherPEERJ INC
SubtypeArticle
Publication PlaceLONDON
Funding OrganizationBiodiversity 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 Emailxiaohuajin@ibcas.ac.cn
OAGreen Published, gold
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ibcas.ac.cn/handle/2S10CLM1/21726
Collection系统与进化植物学国家重点实验室
Affiliation1.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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