1
|
Geng LY, Jiang TY, Chen X, Li Q, Ma JH, Hou WX, Tang CQ, Wang Q, Deng YF. Plastome structure, phylogeny and evolution of plastid genes in Reevesia (Helicteroideae, Malvaceae). JOURNAL OF PLANT RESEARCH 2024; 137:589-604. [PMID: 38739241 DOI: 10.1007/s10265-024-01547-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 04/29/2024] [Indexed: 05/14/2024]
Abstract
Reevesia is an eastern Asian-eastern North American disjunction genus in the family Malvaceae s.l. and comprises approximately 25 species. The relationships within the genus are not well understood. Here, 15 plastomes representing 12 Reevesia species were compared, with the aim of better understanding the species circumscription and phylogenetic relationships within the genus and among genera in the family Malvaceae s.l. The 11 newly sequenced plastomes range between 161,532 and 161, 945 bp in length. The genomes contain 114 unique genes, 18 of which are duplicated in the inverted repeats (IRs). Gene content of these plastomes is nearly identical. All the protein-coding genes are under purifying selection in the Reevesia plastomes compared. The top ten hypervariable regions, SSRs, and the long repeats identified are potential molecular markers for future population genetic and phylogenetic studies. Phylogenetic analysis based on the whole plastomes confirmed the monophyly of Reevesia and a close relationship with Durio (traditional Bombacaceae) in subfamily Helicteroideae, but not with the morphologically similar genera Pterospermum and Sterculia (both of traditional Sterculiaceae). Phylogenetic relationships within Reevesia suggested that two species, R. pubescens and R. thyrsoidea, as newly defined, are not monophyletic. Six taxa, R. membranacea, R. xuefengensis, R. botingensis, R. lofouensis, R. longipetiolata and R. pycnantha, are suggested to be recognized.
Collapse
Affiliation(s)
- Li-Yang Geng
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Tian-Yi Jiang
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Xin Chen
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China.
| | - Qiang Li
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Jian-Hui Ma
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Wen-Xiang Hou
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Chen-Qian Tang
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Qin Wang
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Yun-Fei Deng
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
- Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Guangzhou, 510650, China
| |
Collapse
|
2
|
Feng Z, Zheng Y, Jiang Y, Pei J, Huang L. Phylogenetic relationships, selective pressure and molecular markers development of six species in subfamily Polygonoideae based on complete chloroplast genomes. Sci Rep 2024; 14:9783. [PMID: 38684694 PMCID: PMC11059183 DOI: 10.1038/s41598-024-58934-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 04/04/2024] [Indexed: 05/02/2024] Open
Abstract
The subfamily Polygonoideae encompasses a diverse array of medicinal and horticultural plants that hold significant economic value. However, due to the lack of a robust taxonomy based on phylogenetic relationships, the classification within this family is perplexing, and there is also a scarcity of reports on the chloroplast genomes of many plants falling under this classification. In this study, we conducted a comprehensive analysis by sequencing and characterizing the complete chloroplast genomes of six Polygonoideae plants, namely Pteroxygonum denticulatum, Pleuropterus multiflorus, Pleuropterus ciliinervis, Fallopia aubertii, Fallopia dentatoalata, and Fallopia convolvulus. Our findings revealed that these six plants possess chloroplast genomes with a typical quadripartite structure, averaging 162,931 bp in length. Comparative chloroplast analysis, codon usage analysis, and repetitive sequence analysis demonstrated a high level of conservation within the chloroplast genomes of these plants. Furthermore, phylogenetic analysis unveiled a distinct clade occupied by P. denticulatum, while P. ciliinrvis displayed a closer relationship to the three plants belonging to the Fallopia genus. Selective pressure analysis based on maximum likelihood trees showed that a total of 14 protein-coding genes exhibited positive selection, with psbB and ycf1 having the highest number of positive amino acid sites. Additionally, we identified four molecular markers, namely petN-psbM, psal-ycf4, ycf3-trnS-GGA, and trnL-UAG-ccsA, which exhibit high variability and can be utilized for the identification of these six plants.
Collapse
Affiliation(s)
- Zhan Feng
- Key Laboratory of Chinese Medicine Resources Conservation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100193, China
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, Sichuan, China
| | - Yan Zheng
- Key Laboratory of Chinese Medicine Resources Conservation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100193, China
| | - Yuan Jiang
- Key Laboratory of Chinese Medicine Resources Conservation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100193, China
| | - Jin Pei
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, Sichuan, China.
| | - Linfang Huang
- Key Laboratory of Chinese Medicine Resources Conservation, State Administration of Traditional Chinese Medicine of the People's Republic of China, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100193, China.
| |
Collapse
|
3
|
Liu H, Liu X, Sun C, Li HL, Li ZX, Guo Y, Fu XQ, Liao QH, Zhang WL, Liu YQ. Chloroplast Genome Comparison and Phylogenetic Analysis of the Commercial Variety Actinidia chinensis 'Hongyang'. Genes (Basel) 2023; 14:2136. [PMID: 38136958 PMCID: PMC10743354 DOI: 10.3390/genes14122136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 11/23/2023] [Accepted: 11/25/2023] [Indexed: 12/24/2023] Open
Abstract
Actinidia chinensis 'Hongyang', also known as red yangtao (red heart kiwifruit), is a vine fruit tree native to China possessing significant nutritional and economic value. However, information on its genetic diversity and phylogeny is still very limited. The first chloroplast (cp) genome of A. chinensis 'Hongyang' cultivated in China was sequenced using de novo technology in this study. A. chinensis 'Hongyang' possesses a cp genome that spans 156,267 base pairs (bp), exhibiting an overall GC content of 37.20%. There were 132 genes that were annotated, with 85 of them being protein-coding genes, 39 transfer RNA (tRNA) genes, and 8 ribosomal RNA (rRNA) genes. A total of 49 microsatellite sequences (SSRs) were detected, mainly single nucleotide repeats, mostly consisting of A or T base repeats. Compared with 14 other species, the cp genomes of A. chinensis 'Hongyang' were biased towards the use of codons containing A/U, and the non-protein coding regions in the A. chinensis 'Hongyang' cpDNA showed greater variation than the coding regions. The nucleotide polymorphism analysis (Pi) yielded nine highly variable region hotspots, most in the large single copy (LSC) region. The cp genome boundary analysis revealed a conservative order of gene arrangement in the inverted repeats (IRs) region of the cp genomes of 15 Actinidia plants, with small expansions and contractions of the boundaries. Furthermore, phylogenetic tree indicated that A. chinensis 'Hongyang' was the closest relative to A. indochinensis. This research provides a useful basis for future genetic and evolutionary studies of A. chinensis 'Hongyang', and enriches the biological information of Actinidia species.
Collapse
Affiliation(s)
- Han Liu
- College of Landscape Architecture and Life Science, Chongqing University of Arts and Sciences, Chongqing 402160, China; (H.L.); (C.S.); (H.-L.L.); (Z.-X.L.); (Y.G.); (X.-Q.F.); (Q.-H.L.); (W.-L.Z.)
- College of Biology and Food Engineering, Chongqing Three Gorges University, Chongqing 404000, China
| | - Xia Liu
- College of Landscape Architecture and Life Science, Chongqing University of Arts and Sciences, Chongqing 402160, China; (H.L.); (C.S.); (H.-L.L.); (Z.-X.L.); (Y.G.); (X.-Q.F.); (Q.-H.L.); (W.-L.Z.)
| | - Chong Sun
- College of Landscape Architecture and Life Science, Chongqing University of Arts and Sciences, Chongqing 402160, China; (H.L.); (C.S.); (H.-L.L.); (Z.-X.L.); (Y.G.); (X.-Q.F.); (Q.-H.L.); (W.-L.Z.)
- Spice Crops Research Institute, College of Horticulture and Gardening, Yangtze University, Jingzhou 434023, China;
| | - Hong-Lei Li
- College of Landscape Architecture and Life Science, Chongqing University of Arts and Sciences, Chongqing 402160, China; (H.L.); (C.S.); (H.-L.L.); (Z.-X.L.); (Y.G.); (X.-Q.F.); (Q.-H.L.); (W.-L.Z.)
| | - Zhe-Xin Li
- College of Landscape Architecture and Life Science, Chongqing University of Arts and Sciences, Chongqing 402160, China; (H.L.); (C.S.); (H.-L.L.); (Z.-X.L.); (Y.G.); (X.-Q.F.); (Q.-H.L.); (W.-L.Z.)
| | - Yuan Guo
- College of Landscape Architecture and Life Science, Chongqing University of Arts and Sciences, Chongqing 402160, China; (H.L.); (C.S.); (H.-L.L.); (Z.-X.L.); (Y.G.); (X.-Q.F.); (Q.-H.L.); (W.-L.Z.)
| | - Xue-Qian Fu
- College of Landscape Architecture and Life Science, Chongqing University of Arts and Sciences, Chongqing 402160, China; (H.L.); (C.S.); (H.-L.L.); (Z.-X.L.); (Y.G.); (X.-Q.F.); (Q.-H.L.); (W.-L.Z.)
| | - Qin-Hong Liao
- College of Landscape Architecture and Life Science, Chongqing University of Arts and Sciences, Chongqing 402160, China; (H.L.); (C.S.); (H.-L.L.); (Z.-X.L.); (Y.G.); (X.-Q.F.); (Q.-H.L.); (W.-L.Z.)
| | - Wen-Lin Zhang
- College of Landscape Architecture and Life Science, Chongqing University of Arts and Sciences, Chongqing 402160, China; (H.L.); (C.S.); (H.-L.L.); (Z.-X.L.); (Y.G.); (X.-Q.F.); (Q.-H.L.); (W.-L.Z.)
| | - Yi-Qing Liu
- Spice Crops Research Institute, College of Horticulture and Gardening, Yangtze University, Jingzhou 434023, China;
| |
Collapse
|
4
|
Montenegro JD, Julca I, Chumbe-Nolasco LD, Rodríguez-Pérez LM, Sevilla Panizo R, Medina-Hoyos A, Gutiérrez-Reynoso DL, Guerrero-Abad JC, Amasifuen Guerra CA, García-Serquén AL. Phylogenomic Analysis of the Plastid Genome of the Peruvian Purple Maize Zea mays subsp. mays cv. 'INIA 601'. PLANTS (BASEL, SWITZERLAND) 2022; 11:2727. [PMID: 36297753 PMCID: PMC9612013 DOI: 10.3390/plants11202727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/03/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Peru is an important center of diversity for maize; its different cultivars have been adapted to distinct altitudes and water availability and possess an array of kernel colors (red, blue, and purple), which are highly appreciated by local populations. Specifically, Peruvian purple maize is a collection of native landraces selected and maintained by indigenous cultures due to its intense purple color in the seed, bract, and cob. This color is produced by anthocyanin pigments, which have gained interest due to their potential use in the food, agriculture, and pharmaceutical industry. It is generally accepted that the Peruvian purple maize originated from a single ancestral landrace 'Kculli', but it is not well understood. To study the origin of the Peruvian purple maize, we assembled the plastid genomes of the new cultivar 'INIA 601' with a high concentration of anthocyanins, comparing them with 27 cultivars/landraces of South America, 9 Z. mays subsp. parviglumis, and 5 partial genomes of Z. mays subsp. mexicana. Using these genomes, plus four other maize genomes and two outgroups from the NCBI database, we reconstructed the phylogenetic relationship of Z. mays. Our results suggest a polyphyletic origin of purple maize in South America and agree with a complex scenario of domestication with recurrent gene flow from wild relatives. Additionally, we identify 18 plastid positions that can be used as high-confidence genetic markers for further studies. Altogether, these plastid genomes constitute a valuable resource to study the evolution and domestication of Z. mays in South America.
Collapse
Affiliation(s)
- Juan D. Montenegro
- Laboratorio de Biología Molecular y Genómica, Dirección de Recursos Genéticos y Biotecnología, Instituto Nacional de Innovación Agraria (INIA), Av. La Molina 1981, Lima 15024, Peru
- Department of Neurosciences and Developmental Biology, University of Vienna, Campus-Vienna-Biocenter 1, 1030 Vienna, Austria
| | - Irene Julca
- Laboratorio de Biología Molecular y Genómica, Dirección de Recursos Genéticos y Biotecnología, Instituto Nacional de Innovación Agraria (INIA), Av. La Molina 1981, Lima 15024, Peru
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Lenin D. Chumbe-Nolasco
- Laboratorio de Biología Molecular y Genómica, Dirección de Recursos Genéticos y Biotecnología, Instituto Nacional de Innovación Agraria (INIA), Av. La Molina 1981, Lima 15024, Peru
| | - Lila M. Rodríguez-Pérez
- Laboratorio de Biología Molecular y Genómica, Dirección de Recursos Genéticos y Biotecnología, Instituto Nacional de Innovación Agraria (INIA), Av. La Molina 1981, Lima 15024, Peru
| | - Ricardo Sevilla Panizo
- Departamento de Fitotecnia, Facultad de Agronomía, Universidad Nacional Agraria La Molina, Av. La Molina s/n, Lima 15024, Peru
| | - Alicia Medina-Hoyos
- Estación Experimental Agraria “Baños del Inca”, Instituto Nacional de Innovación Agraria (INIA), Km. 5.5 Carretera Cajamarca–Celendín, Cajamarca 06000, Peru
| | - Dina L. Gutiérrez-Reynoso
- Laboratorio de Biología Molecular y Genómica, Dirección de Recursos Genéticos y Biotecnología, Instituto Nacional de Innovación Agraria (INIA), Av. La Molina 1981, Lima 15024, Peru
| | - Juan Carlos Guerrero-Abad
- Laboratorio de Biología Molecular y Genómica, Dirección de Recursos Genéticos y Biotecnología, Instituto Nacional de Innovación Agraria (INIA), Av. La Molina 1981, Lima 15024, Peru
| | - Carlos A. Amasifuen Guerra
- Laboratorio de Biología Molecular y Genómica, Dirección de Recursos Genéticos y Biotecnología, Instituto Nacional de Innovación Agraria (INIA), Av. La Molina 1981, Lima 15024, Peru
| | - Aura L. García-Serquén
- Laboratorio de Biología Molecular y Genómica, Dirección de Recursos Genéticos y Biotecnología, Instituto Nacional de Innovación Agraria (INIA), Av. La Molina 1981, Lima 15024, Peru
| |
Collapse
|
5
|
Feng Z, Zheng Y, Jiang Y, Miao YJ, Luo GM, Huang L. Complete chloroplast genome of Gentianopsis barbata and comparative analysis with related species from Gentianaceae. Genome 2022; 65:363-375. [DOI: 10.1139/gen-2021-0080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Gentianopsis barbata is an essential medicinal plant in China with high ornamental and medicinal values. Unfortunately, the study of the chloroplast genome of this plant still has a gap. This study sequenced and characterized the complete chloroplast genome of G. barbata. The complete chloroplast genome of G. barbata is a typical circular structure with 151,123 bp. It consists of a large single-copy region (82,690 bp) and a small single-copy region (17,887 bp) separated by a pair of inverted repeats (25,273 bp), which covers 78 protein-coding genes, 30 tRNAs, and 4 rRNAs. Repeat analysis showed the highest frequency of palindrome. Thirty-seven simple sequence repeats were identified, most of which were single nucleotides. The bayesian inference tree, maximum likelihood tree, and neighbor joining tree suggested that G. barbata is grouped with Gentianopsis grandis and Gentianopsis paludosa. The divergence time analysis showed that G. barbata diverged at 1.243 Mya. Comparative chloroplast analysis can reveal interspecific diversity, and regions with high variation can be used to develop molecular markers applicable to various research areas. Our results provide new insight into plastome evolution and valuable resource for further studies on G. barbata.
Collapse
Affiliation(s)
- Zhan Feng
- Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Medicinal Plant Development, 198148, Haidian District, Beijing, China
- Jiangxi University of Traditional Chinese Medicine, 74582, Nanchang, Jiangxi, China
| | - Yan Zheng
- Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Medicinal Plant Development, 198148, Haidian District, Beijing, China
- Jiangxi University of Traditional Chinese Medicine, 74582, Nanchang, Jiangxi, China
| | - Yuan Jiang
- Chinese Academy of Medical Sciences & Peking Union Medical College, 12501, Beijing, China
- Dali University, 66359, Dali, China
| | - Yu Jing Miao
- Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Medicinal Plant Development, 198148, Haidian District, Beijing, China
| | - Guang Ming Luo
- Jiangxi University of Traditional Chinese Medicine, 74582, Nanchang, China
| | - Linfang Huang
- Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Medicinal Plant Development, 198148, Haidian District, China
| |
Collapse
|
6
|
Chloroplast genome sequence of Chongming lima bean (Phaseolus lunatus L.) and comparative analyses with other legume chloroplast genomes. BMC Genomics 2021; 22:194. [PMID: 33736599 PMCID: PMC7977240 DOI: 10.1186/s12864-021-07467-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 02/23/2021] [Indexed: 11/16/2022] Open
Abstract
Background Lima bean (Phaseolus lunatus L.) is a member of subfamily Phaseolinae belonging to the family Leguminosae and an important source of plant proteins for the human diet. As we all know, lima beans have important economic value and great diversity. However, our knowledge of the chloroplast genome level of lima beans is limited. Results The chloroplast genome of lima bean was obtained by Illumina sequencing technology for the first time. The Cp genome with a length of 150,902 bp, including a pair of inverted repeats (IRA and IRB 26543 bp each), a large single-copy (LSC 80218 bp) and a small single-copy region (SSC 17598 bp). In total, 124 unique genes including 82 protein-coding genes, 34 tRNA genes, and 8 rRNA genes were identified in the P. lunatus Cp genome. A total of 61 long repeats and 290 SSRs were detected in the lima bean Cp genome. It has a typical 50 kb inversion of the Leguminosae family and an 70 kb inversion to subtribe Phaseolinae. rpl16, accD, petB, rsp16, clpP, ndhA, ndhF and ycf1 genes in coding regions was found significant variation, the intergenic regions of trnk-rbcL, rbcL-atpB, ndhJ-rps4, psbD-rpoB, atpI-atpA, atpA-accD, accD-psbJ, psbE-psbB, rsp11-rsp19, ndhF-ccsA was found in a high degree of divergence. A phylogenetic analysis showed that P. lunatus appears to be more closely related to P. vulgaris, V.unguiculata and V. radiata. Conclusions The characteristics of the lima bean Cp genome was identified for the first time, these results will provide useful insights for species identification, evolutionary studies and molecular biology research. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-07467-8.
Collapse
|
7
|
Wang W, Lanfear R. Long-Reads Reveal That the Chloroplast Genome Exists in Two Distinct Versions in Most Plants. Genome Biol Evol 2019; 11:3372-3381. [PMID: 31750905 PMCID: PMC7145664 DOI: 10.1093/gbe/evz256] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/15/2019] [Indexed: 12/18/2022] Open
Abstract
The chloroplast genome usually has a quadripartite structure consisting of a large single copy region and a small single copy region separated by two long inverted repeats. It has been known for some time that a single cell may contain at least two structural haplotypes of this structure, which differ in the relative orientation of the single copy regions. However, the methods required to detect and measure the abundance of the structural haplotypes are labor-intensive, and this phenomenon remains understudied. Here, we develop a new method, Cp-hap, to detect all possible structural haplotypes of chloroplast genomes of quadripartite structure using long-read sequencing data. We use this method to conduct a systematic analysis and quantification of chloroplast structural haplotypes in 61 land plant species across 19 orders of Angiosperms, Gymnosperms, and Pteridophytes. Our results show that there are two chloroplast structural haplotypes which occur with equal frequency in most land plant individuals. Nevertheless, species whose chloroplast genomes lack inverted repeats or have short inverted repeats have just a single structural haplotype. We also show that the relative abundance of the two structural haplotypes remains constant across multiple samples from a single individual plant, suggesting that the process which maintains equal frequency of the two haplotypes operates rapidly, consistent with the hypothesis that flip-flop recombination mediates chloroplast structural heteroplasmy. Our results suggest that previous claims of differences in chloroplast genome structure between species may need to be revisited.
Collapse
Affiliation(s)
- Weiwen Wang
- Division of Ecology and Evolution, Research School of Biology, Australian National University, Acton, Australian Capital Territory, Australia
| | - Robert Lanfear
- Division of Ecology and Evolution, Research School of Biology, Australian National University, Acton, Australian Capital Territory, Australia
| |
Collapse
|
8
|
Nieuwenhuis M, van de Peppel LJJ, Bakker FT, Zwaan BJ, Aanen DK. Enrichment of G4DNA and a Large Inverted Repeat Coincide in the Mitochondrial Genomes of Termitomyces. Genome Biol Evol 2019; 11:1857-1869. [PMID: 31209489 PMCID: PMC6609731 DOI: 10.1093/gbe/evz122] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/11/2019] [Indexed: 12/20/2022] Open
Abstract
Mitochondria retain their own genome, a hallmark of their bacterial ancestry. Mitochondrial genomes (mtDNA) are highly diverse in size, shape, and structure, despite their conserved function across most eukaryotes. Exploring extreme cases of mtDNA architecture can yield important information on fundamental aspects of genome biology. We discovered that the mitochondrial genomes of a basidiomycete fungus (Termitomyces spp.) contain an inverted repeat (IR), a duplicated region half the size of the complete genome. In addition, we found an abundance of sequences capable of forming G-quadruplexes (G4DNA); structures that can disrupt the double helical formation of DNA. G4DNA is implicated in replication fork stalling, double-stranded breaks, altered gene expression, recombination, and other effects. To determine whether this occurrence of IR and G4DNA was correlated within the genus Termitomyces, we reconstructed the mitochondrial genomes of 11 additional species including representatives of several closely related genera. We show that the mtDNA of all sampled species of Termitomyces and its sister group, represented by the species Tephrocybe rancida and Blastosporella zonata, are characterized by a large IR and enrichment of G4DNA. To determine whether high mitochondrial G4DNA content is common in fungi, we conducted the first broad survey of G4DNA content in fungal mtDNA, revealing it to be a highly variable trait. The results of this study provide important direction for future research on the function and evolution of G4DNA and organellar IRs.
Collapse
Affiliation(s)
| | | | - Freek T Bakker
- Biosystematics Group, Wageningen University & Research, The Netherlands
| | - Bas J Zwaan
- Laboratory of Genetics, Wageningen University & Research, The Netherlands
| | - Duur K Aanen
- Laboratory of Genetics, Wageningen University & Research, The Netherlands
| |
Collapse
|
9
|
Lee J, Cho CH, Park SI, Choi JW, Song HS, West JA, Bhattacharya D, Yoon HS. Parallel evolution of highly conserved plastid genome architecture in red seaweeds and seed plants. BMC Biol 2016; 14:75. [PMID: 27589960 PMCID: PMC5010701 DOI: 10.1186/s12915-016-0299-5] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 08/17/2016] [Indexed: 11/10/2022] Open
Abstract
Background The red algae (Rhodophyta) diverged from the green algae and plants (Viridiplantae) over one billion years ago within the kingdom Archaeplastida. These photosynthetic lineages provide an ideal model to study plastid genome reduction in deep time. To this end, we assembled a large dataset of the plastid genomes that were available, including 48 from the red algae (17 complete and three partial genomes produced for this analysis) to elucidate the evolutionary history of these organelles. Results We found extreme conservation of plastid genome architecture in the major lineages of the multicellular Florideophyceae red algae. Only three minor structural types were detected in this group, which are explained by recombination events of the duplicated rDNA operons. A similar high level of structural conservation (although with different gene content) was found in seed plants. Three major plastid genome architectures were identified in representatives of 46 orders of angiosperms and three orders of gymnosperms. Conclusions Our results provide a comprehensive account of plastid gene loss and rearrangement events involving genome architecture within Archaeplastida and lead to one over-arching conclusion: from an ancestral pool of highly rearranged plastid genomes in red and green algae, the aquatic (Florideophyceae) and terrestrial (seed plants) multicellular lineages display high conservation in plastid genome architecture. This phenomenon correlates with, and could be explained by, the independent and widely divergent (separated by >400 million years) origins of complex sexual cycles and reproductive structures that led to the rapid diversification of these lineages. Electronic supplementary material The online version of this article (doi:10.1186/s12915-016-0299-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- JunMo Lee
- Department of Biological Sciences, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Chung Hyun Cho
- Department of Biological Sciences, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Seung In Park
- Department of Biological Sciences, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Ji Won Choi
- Department of Biological Sciences, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Hyun Suk Song
- Department of Biological Sciences, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - John A West
- School of Biosciences 2, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Debashish Bhattacharya
- Department of Ecology, Evolution and Natural Resources, Rutgers University, New Brunswick, NJ, 08901, USA
| | - Hwan Su Yoon
- Department of Biological Sciences, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
| |
Collapse
|
10
|
Walker JF, Jansen RK, Zanis MJ, Emery NC. Sources of inversion variation in the small single copy (SSC) region of chloroplast genomes. AMERICAN JOURNAL OF BOTANY 2015; 102:1751-2. [PMID: 26546126 DOI: 10.3732/ajb.1500299] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 09/29/2015] [Indexed: 05/02/2023]
Affiliation(s)
- Joseph F Walker
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan 48109 USA
| | - Robert K Jansen
- Department of Integrative Biology, University of Texas at Austin, Austin, Texas 78712 USA Biotechnology Research Group, Department of Biological Sciences, King Abdulaziz University, Jeddah 21589 Saudi Arabia
| | - Michael J Zanis
- Department of Biology, Seattle University, Seattle, Washington 98122 USA
| | - Nancy C Emery
- Department of Ecology & Evolutionary Biology, Campus Box 334, University of Colorado Boulder, Boulder, Colorado 80309-0334 USA
| |
Collapse
|
11
|
Hovde BT, Starkenburg SR, Hunsperger HM, Mercer LD, Deodato CR, Jha RK, Chertkov O, Monnat RJ, Cattolico RA. The mitochondrial and chloroplast genomes of the haptophyte Chrysochromulina tobin contain unique repeat structures and gene profiles. BMC Genomics 2014; 15:604. [PMID: 25034814 PMCID: PMC4226036 DOI: 10.1186/1471-2164-15-604] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 07/09/2014] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Haptophytes are widely and abundantly distributed in both marine and freshwater ecosystems. Few genomic analyses of representatives within this taxon have been reported, despite their early evolutionary origins and their prominent role in global carbon fixation. RESULTS The complete mitochondrial and chloroplast genome sequences of the haptophyte Chrysochromulina tobin (Prymnesiales) provide insight into the architecture and gene content of haptophyte organellar genomes. The mitochondrial genome (~34 kb) encodes 21 protein coding genes and contains a complex, 9 kb tandem repeat region. Similar to other haptophytes and rhodophytes, but not cryptophytes or stramenopiles, the mitochondrial genome has lost the nad7, nad9 and nad11 genes. The ~105 kb chloroplast genome encodes 112 protein coding genes, including ycf39 which has strong structural homology to NADP-binding nitrate transcriptional regulators; a divergent 'CheY-like' two-component response regulator (ycf55) and Tic/Toc (ycf60 and ycf80) membrane transporters. Notably, a zinc finger domain has been identified in the rpl36 ribosomal protein gene of all chloroplasts sequenced to date with the exception of haptophytes and cryptophytes--algae that have gained (via lateral gene transfer) an alternative rpl36 lacking the zinc finger motif. The two C. tobin chloroplast ribosomal RNA operon spacer regions differ in tRNA content. Additionally, each ribosomal operon contains multiple single nucleotide polymorphisms (SNPs)--a pattern observed in rhodophytes and cryptophytes, but few stramenopiles. Analysis of small (<200 bp) chloroplast encoded tandem and inverted repeats in C. tobin and 78 other algal chloroplast genomes show that repeat type, size and location are correlated with gene identity and taxonomic clade. CONCLUSION The Chrysochromulina tobin organellar genomes provide new insight into organellar function and evolution. These are the first organellar genomes to be determined for the prymnesiales, a taxon that is present in both oceanic and freshwater systems and represents major primary photosynthetic producers and contributors to global ecosystem stability.
Collapse
|
12
|
Cattolico RA, Jacobs MA, Zhou Y, Chang J, Duplessis M, Lybrand T, McKay J, Ong HC, Sims E, Rocap G. Chloroplast genome sequencing analysis of Heterosigma akashiwo CCMP452 (West Atlantic) and NIES293 (West Pacific) strains. BMC Genomics 2008; 9:211. [PMID: 18462506 PMCID: PMC2410131 DOI: 10.1186/1471-2164-9-211] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2007] [Accepted: 05/08/2008] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Heterokont algae form a monophyletic group within the stramenopile branch of the tree of life. These organisms display wide morphological diversity, ranging from minute unicells to massive, bladed forms. Surprisingly, chloroplast genome sequences are available only for diatoms, representing two (Coscinodiscophyceae and Bacillariophyceae) of approximately 18 classes of algae that comprise this taxonomic cluster. A universal challenge to chloroplast genome sequencing studies is the retrieval of highly purified DNA in quantities sufficient for analytical processing. To circumvent this problem, we have developed a simplified method for sequencing chloroplast genomes, using fosmids selected from a total cellular DNA library. The technique has been used to sequence chloroplast DNA of two Heterosigma akashiwo strains. This raphidophyte has served as a model system for studies of stramenopile chloroplast biogenesis and evolution. RESULTS H. akashiwo strain CCMP452 (West Atlantic) chloroplast DNA is 160,149 bp in size with a 21,822-bp inverted repeat, whereas NIES293 (West Pacific) chloroplast DNA is 159,370 bp in size and has an inverted repeat of 21,665 bp. The fosmid cloning technique reveals that both strains contain an isomeric chloroplast DNA population resulting from an inversion of their single copy domains. Both strains contain multiple small inverted and tandem repeats, non-randomly distributed within the genomes. Although both CCMP452 and NIES293 chloroplast DNAs contains 197 genes, multiple nucleotide polymorphisms are present in both coding and intergenic regions. Several protein-coding genes contain large, in-frame inserts relative to orthologous genes in other plastids. These inserts are maintained in mRNA products. Two genes of interest in H. akashiwo, not previously reported in any chloroplast genome, include tyrC, a tyrosine recombinase, which we hypothesize may be a result of a lateral gene transfer event, and an unidentified 456 amino acid protein, which we hypothesize serves as a G-protein-coupled receptor. The H. akashiwo chloroplast genomes share little synteny with other algal chloroplast genomes sequenced to date. CONCLUSION The fosmid cloning technique eliminates chloroplast isolation, does not require chloroplast DNA purification, and reduces sequencing processing time. Application of this method has provided new insights into chloroplast genome architecture, gene content and evolution within the stramenopile cluster.
Collapse
MESH Headings
- Algal Proteins/genetics
- Amino Acid Sequence
- Atlantic Ocean
- Base Sequence
- Chromosome Mapping
- Cloning, Molecular
- Conserved Sequence
- DNA, Algal/genetics
- DNA, Algal/isolation & purification
- DNA, Chloroplast/genetics
- DNA, Chloroplast/isolation & purification
- Furans
- Genome, Chloroplast
- Molecular Sequence Data
- Pacific Ocean
- Phaeophyceae/classification
- Phaeophyceae/genetics
- Phaeophyceae/isolation & purification
- Polymorphism, Single Nucleotide
- Recombinases/genetics
- Repetitive Sequences, Nucleic Acid
- Sequence Analysis, DNA/methods
- Sequence Homology, Amino Acid
- Species Specificity
- Thiophenes
Collapse
Affiliation(s)
- Rose Ann Cattolico
- Department of Biology, University of Washington, Box 355325, Seattle, WA 98195-5325, USA
- School of Oceanography, University of Washington, Box 357940, Seattle, WA 98195-7940, USA
| | - Michael A Jacobs
- Department of Medicine, University of Washington, Box 352145, Seattle WA 98195-2145, USA
| | - Yang Zhou
- Department of Medicine, University of Washington, Box 352145, Seattle WA 98195-2145, USA
| | - Jean Chang
- Department of Medicine, University of Washington, Box 352145, Seattle WA 98195-2145, USA
| | - Melinda Duplessis
- Department of Biology, University of Washington, Box 355325, Seattle, WA 98195-5325, USA
| | - Terry Lybrand
- Vanderbilt University Center for Structural Biology, 5142 Biosci/MRB III, Nashville, TN 37232-8725, USA
| | - John McKay
- School of Oceanography, University of Washington, Box 357940, Seattle, WA 98195-7940, USA
| | - Han Chuan Ong
- Department of Biology, University of Washington, Box 355325, Seattle, WA 98195-5325, USA
- School of Oceanography, University of Washington, Box 357940, Seattle, WA 98195-7940, USA
- Division of Science, Lyon College, 2300 Highland Rd, Batesville, AR 72501-3629, USA
| | - Elizabeth Sims
- Department of Medicine, University of Washington, Box 352145, Seattle WA 98195-2145, USA
| | - Gabrielle Rocap
- School of Oceanography, University of Washington, Box 357940, Seattle, WA 98195-7940, USA
| |
Collapse
|
13
|
Abstract
Genomes comprising a pair of separated inverted repeats and called 'amphimers' are reviewed. Amphimeric genomes are observed in a large variety of different organisms, ranging from archaebacteria to mammals. The widespread existence of amphimeric genomes in nature could be due to their particular dynamic structure. Amphimeric genomes containing long inverted segments may provide the only form in which a duplicated segment is stably retained in genomes. Amphimers are often found in amplified subgenomes, indicating that they could promote a special mechanism of DNA replication and amplification. The possible mechanisms of generation, isomerization and replication/amplification of different types of amphimeric genomes are discussed. The study of amphimeric mitochondrial petite genomes of yeast could be a good model system for the study of the role of inverted repeat sequences in genome dynamics.
Collapse
Affiliation(s)
- E Rayko
- Laboratoire de Génétique Moléculaire, Institut Jacques Monod, Paris, France.
| |
Collapse
|
14
|
Boudreau E, Turmel M. Gene rearrangements in Chlamydomonas chloroplast DNAs are accounted for by inversions and by the expansion/contraction of the inverted repeat. PLANT MOLECULAR BIOLOGY 1995; 27:351-64. [PMID: 7888624 DOI: 10.1007/bf00020189] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
To gain insight into the mutational events responsible for the extensive variation of chloroplast DNA (cpDNA) within the green algal genus Chlamydomonas, we have investigated the chloroplast gene organization of Chlamydomonas pitschmannii, a close relative of the interfertile species C. eugametos and C. moewusii whose cpDNAs have been well characterized. At 187 kb, the circular cpDNA of C. pitschmannii is the smallest Chlamydomonas cpDNA yet reported; it is 56 and 105 kb smaller than those of its C. eugametos and C. moewusii counterparts, respectively. Despite this substantial size difference, the arrangement of 77 genes on the C. pitschmannii cpDNA displays only three noticeable differences from the organization of the corresponding genes on the collinear C. eugametos and C. moewusii cpDNAs. These changes in gene order are accounted for by the expansion/contraction of the inverted repeat and one or two inversions in a single-copy region. In land plant cpDNAs, these kinds of events are also responsible for gene rearrangements. The large size difference between the C. pitschmannii and C. eugametos/C. moewusii cpDNAs is mainly attributed to multiple events of deletions/additions as opposed to the usually observed expansion/contraction of the inverted repeat in land plant cpDNAs. We also found that the mitochondrial genome of C. pitschmannii is a circular DNA molecule of 16.5 kb which is 5.5 and 7.5 kb smaller than its C. moewusii and C. eugametos counterparts, respectively.
Collapse
Affiliation(s)
- E Boudreau
- Département de Biochimie, Faculté des Sciences et de Génie, Université Laval, Québec, Canada
| | | |
Collapse
|
15
|
|
16
|
Newman SM, Cattolico RA. Ribulose bisphosphate carboxylase in algae: synthesis, enzymology and evolution. PHOTOSYNTHESIS RESEARCH 1990; 26:69-85. [PMID: 24420459 DOI: 10.1007/bf00047078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/1990] [Accepted: 06/08/1990] [Indexed: 06/03/2023]
Abstract
Studies demonstrating differences in chloroplast structure and biochemistry have been used to formulate hypotheses concerning the origin of algal plastids. Genetic and biochemical experiments indicate that significant variation occurs in ribulose-1,5-bisphosphate carboxylase (Rubisco) when supertaxa of eukaryotic algae are compared. These differences include variations in the organelle location of the genes and their arrangement, mechanism of Rubisco synthesis, polypeptide immunological reactivity and sequence, as well as efficacy of substrate (ribulose bisphosphate and CO2) binding and inhibitor (6-phosphogluconate) action. The structure-function relationships observed among chromophytic, rhodophytic, chlorophytic and prokaryotic Rubisco demonstrate that: (a) similarities among chromophytic and rhodophytic Rubisco exist in substrate/inhibitor binding and polypeptide sequence, (b) characteristic differences in enzyme kinetics and subunit polypeptide structure occur among chlorophytes, prokaryotes and chromophytes/rhodophytes, and (c) there is structural variability among chlorophytic plant small subunit polypeptides, in contrast to the conservation of this polypeptide in chromophytes and rhodophytes. Taxa-specific differences among algal Rubisco enzymes most likely reflect the evolutionary history of the plastid, the functional requirements of each polypeptide, and the consequences of encoding the large and small subunit genes in the same or different organelles.
Collapse
Affiliation(s)
- S M Newman
- Department of Botany, University of Washington, 98195, Seattle, WA, USA
| | | |
Collapse
|
17
|
Localization of two novel chloroplast genome functions: trans-splicing of RNA and protochlorophyllide reduction. Curr Genet 1990. [DOI: 10.1007/bf00312860] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
18
|
Lemieux B, Turmel M, Lemieux C. Recombination of Chlamydomonas chloroplast DNA occurs more frequently in the large inverted repeat sequence than in the single-copy regions. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1990; 79:17-27. [PMID: 24226114 DOI: 10.1007/bf00223781] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/1989] [Accepted: 08/30/1989] [Indexed: 06/02/2023]
Abstract
It is well documented that chloroplast DNA (cpDNA) recombination occurs at a relatively high frequency during sexual reproduction of unicellular green algae from the Chlamydomonas genus. Like the cpDNAs of most land plants, those of Chlamydomonas species are divided into two single-copy regions by a large inverted repeat sequence, part of which encodes the chloroplast rRNA genes. In the present study, we scored the inheritance of polymorphic loci spanning the entire chloroplast genome in hybrids recovered from reciprocal interspecific and F1 crosses between Chlamydomonas eugametes and C. moewusii, and from these data, estimated the density of recombination junctions within each region of recombinant cpDNAs. Our results indicate that recombination junctions occur at highly variable frequencies across the three main domains of the chloroplast genome. The large inverted repeat sequence was found to exhibit at least a five-fold higher density of recombination junctions compared to one of the singlecopy regions, whereas junctions in the latter region were five-fold more abundant relative to those in the other single-copy region. This marked difference in the densities of recombination junctions implies that the extent of genetic linkage between two given chloroplast loci will depend not only on their physical distance, but also on their locations within the genome.
Collapse
Affiliation(s)
- B Lemieux
- Département de Biochimie, Faculté des Sciences et de Génie, Université Laval, G1K 7P4, Québec, Québec, Canada
| | | | | |
Collapse
|
19
|
Unidirectional gene conversions in the chloroplast of Chlamydomonas interspecific hybrids. ACTA ACUST UNITED AC 1988. [DOI: 10.1007/bf00322443] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
20
|
Choquet Y, Goldschmidt-Clermont M, Girard-Bascou J, Kück U, Bennoun P, Rochaix JD. Mutant phenotypes support a trans-splicing mechanism for the expression of the tripartite psaA gene in the C. reinhardtii chloroplast. Cell 1988; 52:903-13. [PMID: 3280139 DOI: 10.1016/0092-8674(88)90432-1] [Citation(s) in RCA: 153] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The chloroplast psaA gene of the green unicellular alga Chlamydomonas reinhardtii consists of three exons that are transcribed from different strands. Analysis of numerous nuclear and chloroplast mutants that are deficient in photosystem I activity reveals that roughly one-quarter of them are specifically affected in psaA mRNA maturation. These mutants can be grouped into three phenotypic classes, based on their inability to perform either one or both splicing reactions. The data indicate that the three exons are transcribed independently as precursors which are normally assembled in trans and that the splicing reactions can occur in either order. While some chloroplast mutations could act in cis, the nuclear mutations that fall into several complementation groups probably affect factors specifically required for assembling psaA mRNA.
Collapse
Affiliation(s)
- Y Choquet
- Department of Molecular Biology, Genève, Switzerland
| | | | | | | | | | | |
Collapse
|
21
|
Ko K, Orfanides AG, Straus NA. A model for the evolution of the Vicia faba chloroplast genome. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1987; 74:125-139. [PMID: 24241468 DOI: 10.1007/bf00290095] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/1986] [Accepted: 12/10/1986] [Indexed: 06/02/2023]
Abstract
The Vicia faba chloroplast genome lacks inverted repeat sequences and contains only one set of ribosomal RNA genes. The genetic organization has been altered by inversions, relative to the typical arrangement of most higher plant chloroplast genomes. The Vicia faba plastid genome thus represents one of the more interesting results of chloroplast genomic evolution. The present study employs small DNA probes and Southern blot hybridizations to investigate the steps involved in the evolution of the Vicia faba chloroplast genome. The data from heterologous hybridizations between chloroplast DNA of Brassica napus (a conserved genome) and of Vicia faba led to three observations: 1) The inverted repeat segment closest to the psbA gene was deleted prior to the rearrangements. 2) A quarter of the ancestral small single copy region was lost during the deletion. 3) The genetic organization observed in Vicia faba resulted from three inversions after the deletion event. Our findings, combined with previous observations, helped devise a stepwise model for the evolution of the Vicia faba chloroplast genome. The area of the small single copy region absent from the Vicia faba chloroplast chromosome lacks in vivo transcription activity in Brassica napus.
Collapse
Affiliation(s)
- K Ko
- Department of Botany, University of Toronto, M5S 1A1, Toronto, Ontario, Canada
| | | | | |
Collapse
|
22
|
Rochaix JD. Molecular genetics of chloroplasts and mitochondria in the unicellular green algaChlamydomonas. FEMS Microbiol Lett 1987. [DOI: 10.1111/j.1574-6968.1987.tb02449.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
23
|
Physical mapping of differences between the chloroplast DNAs of the interfertile algae Chlamydomonas eugametos and Chlamydomonas moewusii. Curr Genet 1987. [DOI: 10.1007/bf00384618] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
24
|
Palmer JD, Osorio B, Aldrich J, Thompson WF. Chloroplast DNA evolution among legumes: Loss of a large inverted repeat occurred prior to other sequence rearrangements. Curr Genet 1987. [DOI: 10.1007/bf00355401] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
25
|
Structural evolution and flip-flop recombination of chloroplast DNA in the fern genus Osmunda. Curr Genet 1986. [DOI: 10.1007/bf00418530] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
26
|
Brears T, Schardl CL, Lonsdale DM. Chloroplast genome organisation in sugar beet and maize. PLANT MOLECULAR BIOLOGY 1986; 6:171-177. [PMID: 24307276 DOI: 10.1007/bf00021486] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/1985] [Revised: 11/12/1985] [Accepted: 11/19/1985] [Indexed: 06/02/2023]
Abstract
The XhoI and SmaI restriction map of the chloroplast genome from the fertile cytoplasm of sugar beet has been constructed from overlapping cosmid clones. The genome was found to be typical of that of a dicotyledonous species, being 147.3 kb in size and having an inverted repeat. RbcL for the large subunit of ribulose-1,5-bisphosphate carboxylase, psbA for the 32 kD protein of the photosystem II reaction centre, and the 16S ribosomal RNA were located using heterologous probes. In both sugar beet and maize the inverted repeats recombine giving two isomeric forms of the genome.
Collapse
Affiliation(s)
- T Brears
- Plant Breeding Institute, Maris Lane, Trumpington, CB2 2LQ, Cambridge, U.K
| | | | | |
Collapse
|
27
|
Shumard DS, Grossman LI, Hudspeth ME. Achlya mitochondrial DNA: gene localization and analysis of inverted repeats. MOLECULAR & GENERAL GENETICS : MGG 1986; 202:16-23. [PMID: 3007932 DOI: 10.1007/bf00330510] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Mitochondrial DNA from four strains of the oomycete Achlya has been compared and nine gene loci mapped, including that of the ribosomal protein gene, var1. Examination of the restriction enzyme site maps showed the presence of four insertions relative to a map common to all four strains. All the insertions were found in close proximity to genic regions. The four strains also contained the inverted repeat first observed in A. ambisexualis (Hudspeth et al. 1983), allowing an examination by analysis of retained restriction sites of the evolutionary stability of repeated DNA sequences relative to single copy sequences. Although the inverted repeat is significantly more stable than single copy sequences, more detailed analysis indicates that this stability is limited to the portion encoding the ribosomal RNA genes. Thus, the apparent evolutionary stability of the repeat does not appear to derive from the inverted repeat structure per se.
Collapse
|
28
|
|