Chloroplast genome features of Moricandia arvensis (Brassicaceae), a C3-C4 intermediate photosynthetic species.

Moricandia arvensis, a plant species originating from the Mediterranean, has been classified as a rare C3-C4 intermediate species, and it is a possible bridge during the evolutionary process from C3 to C4 plant photosynthesis in the family Brassicaceae. Understanding the genomic structure, gene orde...

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Autores principales: Bin Zhu, Lijuan Hu, Fang Qian, Zuomin Gao, Chenchen Gan, Zhaochao Liu, Xuye Du, Hongcheng Wang
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Publicado: Public Library of Science (PLoS) 2021
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spelling oai:doaj.org-article:68fd921f178b4116bea722d9a80f70222021-12-02T20:09:37ZChloroplast genome features of Moricandia arvensis (Brassicaceae), a C3-C4 intermediate photosynthetic species.1932-620310.1371/journal.pone.0254109https://doaj.org/article/68fd921f178b4116bea722d9a80f70222021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0254109https://doaj.org/toc/1932-6203Moricandia arvensis, a plant species originating from the Mediterranean, has been classified as a rare C3-C4 intermediate species, and it is a possible bridge during the evolutionary process from C3 to C4 plant photosynthesis in the family Brassicaceae. Understanding the genomic structure, gene order, and gene content of chloroplasts (cp) of such species can provide a glimpse into the evolution of photosynthesis. In the present study, we obtained a well-annotated cp genome of M. arvensis using long PacBio and short Illumina reads with a de novo assembly strategy. The M. arvensis cp genome was a quadripartite circular molecule with the length of 153,312 bp, including two inverted repeats (IR) regions of 26,196 bp, divided by a small single copy (SSC) region of 17,786 bp and a large single copy (LSC) region of 83,134 bp. We detected 112 unigenes in this genome, comprising 79 protein-coding genes, 29 tRNAs, and four rRNAs. Forty-nine long repeat sequences and 51 simple sequence repeat (SSR) loci of 15 repeat types were identified. The analysis of Ks (synonymous) and Ka (non-synonymous) substitution rates indicated that the genes associated with "subunits of ATP synthase" (atpB), "subunits of NADH-dehydrogenase" (ndhG and ndhE), and "self-replication" (rps12 and rpl16) showed relatively higher Ka/Ks values than those of the other genes. The gene content, gene order, and LSC/IR/SSC boundaries and adjacent genes of the M. arvensis cp genome were highly conserved compared to those in related C3 species. Our phylogenetic analysis demonstrated that M. arvensis was clustered into a subclade with cultivated Brassica species and Raphanus sativus, indicating that M. arvensis was not involved in an independent evolutionary origin event. These results will open the way for further studies on the evolutionary process from C3 to C4 photosynthesis and hopefully provide guidance for utilizing M. arvensis as a resource for improvinng photosynthesis efficiency in cultivated Brassica species.Bin ZhuLijuan HuFang QianZuomin GaoChenchen GanZhaochao LiuXuye DuHongcheng WangPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 7, p e0254109 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Bin Zhu
Lijuan Hu
Fang Qian
Zuomin Gao
Chenchen Gan
Zhaochao Liu
Xuye Du
Hongcheng Wang
Chloroplast genome features of Moricandia arvensis (Brassicaceae), a C3-C4 intermediate photosynthetic species.
description Moricandia arvensis, a plant species originating from the Mediterranean, has been classified as a rare C3-C4 intermediate species, and it is a possible bridge during the evolutionary process from C3 to C4 plant photosynthesis in the family Brassicaceae. Understanding the genomic structure, gene order, and gene content of chloroplasts (cp) of such species can provide a glimpse into the evolution of photosynthesis. In the present study, we obtained a well-annotated cp genome of M. arvensis using long PacBio and short Illumina reads with a de novo assembly strategy. The M. arvensis cp genome was a quadripartite circular molecule with the length of 153,312 bp, including two inverted repeats (IR) regions of 26,196 bp, divided by a small single copy (SSC) region of 17,786 bp and a large single copy (LSC) region of 83,134 bp. We detected 112 unigenes in this genome, comprising 79 protein-coding genes, 29 tRNAs, and four rRNAs. Forty-nine long repeat sequences and 51 simple sequence repeat (SSR) loci of 15 repeat types were identified. The analysis of Ks (synonymous) and Ka (non-synonymous) substitution rates indicated that the genes associated with "subunits of ATP synthase" (atpB), "subunits of NADH-dehydrogenase" (ndhG and ndhE), and "self-replication" (rps12 and rpl16) showed relatively higher Ka/Ks values than those of the other genes. The gene content, gene order, and LSC/IR/SSC boundaries and adjacent genes of the M. arvensis cp genome were highly conserved compared to those in related C3 species. Our phylogenetic analysis demonstrated that M. arvensis was clustered into a subclade with cultivated Brassica species and Raphanus sativus, indicating that M. arvensis was not involved in an independent evolutionary origin event. These results will open the way for further studies on the evolutionary process from C3 to C4 photosynthesis and hopefully provide guidance for utilizing M. arvensis as a resource for improvinng photosynthesis efficiency in cultivated Brassica species.
format article
author Bin Zhu
Lijuan Hu
Fang Qian
Zuomin Gao
Chenchen Gan
Zhaochao Liu
Xuye Du
Hongcheng Wang
author_facet Bin Zhu
Lijuan Hu
Fang Qian
Zuomin Gao
Chenchen Gan
Zhaochao Liu
Xuye Du
Hongcheng Wang
author_sort Bin Zhu
title Chloroplast genome features of Moricandia arvensis (Brassicaceae), a C3-C4 intermediate photosynthetic species.
title_short Chloroplast genome features of Moricandia arvensis (Brassicaceae), a C3-C4 intermediate photosynthetic species.
title_full Chloroplast genome features of Moricandia arvensis (Brassicaceae), a C3-C4 intermediate photosynthetic species.
title_fullStr Chloroplast genome features of Moricandia arvensis (Brassicaceae), a C3-C4 intermediate photosynthetic species.
title_full_unstemmed Chloroplast genome features of Moricandia arvensis (Brassicaceae), a C3-C4 intermediate photosynthetic species.
title_sort chloroplast genome features of moricandia arvensis (brassicaceae), a c3-c4 intermediate photosynthetic species.
publisher Public Library of Science (PLoS)
publishDate 2021
url https://doaj.org/article/68fd921f178b4116bea722d9a80f7022
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