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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
2020
发表期刊PEERJ
ISSN2167-8359
卷号8
摘要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.
关键词Mycoheterotrophy Exacum paucisquama Gentianaceae Plastid genome Gene loss Inverted repeat region expansion
学科领域Multidisciplinary Sciences
DOI10.7717/peerj.9157
收录类别SCI
语种英语
WOS关键词GLUTAMYL-TRANSFER-RNA ; CHLOROPLAST ; GENOME ; IDENTIFICATION ; REDUCTION ; EVOLUTION ; SEQUENCE ; ORCHIDS
WOS研究方向Science & Technology - Other Topics
WOS记录号WOS:000538940800002
出版者PEERJ INC
文献子类Article
出版地LONDON
资助机构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]
作者邮箱xiaohuajin@ibcas.ac.cn
作品OA属性Green Published, gold
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/21726
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, 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
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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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