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Plastid NDH Pseudogenization and Gene Loss in a Recently Derived Lineage from the Largest Hemiparasitic Plant Genus Pedicularis (Orobanchaceae )
Li,Xin; Yang,Jun-Bo; Wang,Hong; Song,Yu; Corlett,Richard T.; Yao,Xin; Li,De-Zhu; Yu,Wen-Bin
2021
Source PublicationPLANT AND CELL PHYSIOLOGY
ISSN0032-0781
Volume62Issue:6Pages:971-984
AbstractThe plastid genome (plastome) is highly conserved in both gene order and content and has a lower mutation rate than the nuclear genome. However, the plastome is more variable in heterotrophic plants. To date, most such studies have investigated just a few species or only holoheterotrophic groups, and few have examined plastome evolution in recently derived lineages at an early stage of transition from autotrophy to heterotrophy. In this study, we investigated the evolutionary dynamics of plastomes in the monophyletic and recently derived Pedicularis sect. Cyathophora (Orobanchaceae). We obtained 22 new plastomes, 13 from the six recognized species of section Cyathophora, six from hemiparasitic relatives and three from autotrophic relatives. Comparative analyses of gene content, plastome structure and selection pressure showed dramatic differences among species in section Cyathophora and in Pedicularis as a whole. In comparison with autotrophic relatives and other Pedicularis spp., we found that the inverted repeat (IR) region in section Cyathophora had expansions to the small single-copy region, with a large expansion event and two independent contraction events. Moreover, NA(D)H dehydrogenase, accD and ccsA have lost function multiple times, with the function of accD being replaced by nuclear copies of an accD-like gene in Pedicularis spp. The ccsA and ndhG genes may have evolved under selection in association with IR expansion/contraction events. This study is the first to report high plastome variation in a recently derived lineage of hemiparasitic plants and therefore provides evidence for plastome evolution in the transition from autotrophy to heterotrophy.
KeywordHemiparasite IR expansion NA(D)H dehydrogenase-like complex Orobanchaceae Pseudogenization Relaxation of selection ACETYL-COA CARBOXYLASE INVERTED REPEAT LIFE-STYLE ACCD GENE EVOLUTION GENOME DIVERSITY PHYLOGENY SELECTION INSIGHTS
DOI10.1093/pcp/pcab074
WOS IDWOS:000713777400006
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Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/73105
Collection中国科学院昆明植物研究所
Affiliation1.Chinese Acad Sci, Ctr Integrat Conservat, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China
2.Chinese Acad Sci, Ctr Conservat Biol, Core Bot Gardens, Mengla 666303, Yunnan, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Plant Germplasm & Genom Ctr, Kunming Inst Bot, Germplasm Bank Wild Species, Kunming 650201, Yunnan, Peoples R China
5.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
6.Chinese Acad Sci, Southeast Asia Biodivers Res Inst, Yezin 05282, Nay Pyi Taw, Myanmar
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GB/T 7714
Li,Xin,Yang,Jun-Bo,Wang,Hong,et al. Plastid NDH Pseudogenization and Gene Loss in a Recently Derived Lineage from the Largest Hemiparasitic Plant Genus Pedicularis (Orobanchaceae )[J]. PLANT AND CELL PHYSIOLOGY,2021,62(6):971-984.
APA Li,Xin.,Yang,Jun-Bo.,Wang,Hong.,Song,Yu.,Corlett,Richard T..,...&Yu,Wen-Bin.(2021).Plastid NDH Pseudogenization and Gene Loss in a Recently Derived Lineage from the Largest Hemiparasitic Plant Genus Pedicularis (Orobanchaceae ).PLANT AND CELL PHYSIOLOGY,62(6),971-984.
MLA Li,Xin,et al."Plastid NDH Pseudogenization and Gene Loss in a Recently Derived Lineage from the Largest Hemiparasitic Plant Genus Pedicularis (Orobanchaceae )".PLANT AND CELL PHYSIOLOGY 62.6(2021):971-984.
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