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Characterization of the complete chloroplast genome of the Tangut monkshood Aconitum tanguticum (Ranunculales: Ranunculaceae).

ABSTRACT: The Tangut monkshood (Aconitum tanguticum) is a perennial herb with high medicinal values. Here, its chloroplast genome was assembled from Illumina sequencing reads. The circular genome is 157,114 bp long with an A + T-biased nucleotide composition, and comprises a pair of inverted repeat (IR) regions (26,255 bp), separated by a large single-copy (LSC) region (87,559 bp) and a small single-copy (SSC) region (17,045 bp). It encodes a total of 112 gene species, with 19 of them being completely or partially duplicated and 18 of them harboring one or two introns. Phylogenetic analysis recovered two major clades of the genus Aconitum.

SUBMITTER: Li Q

PROVIDER: S-EPMC7782905 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Characterization of the complete chloroplast genome of Aconitum flavum (Ranunculaceae).

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The complete chloroplast genome sequence of Aconitum austroyunnanense W. T. Wang (Ranunculaceae): a medicinal plant endemic to China.

Project description:The complete chloroplast (cp) genome of Aconitum austroyunnanense W. T. Wang, a rare and endangered medicinal plant endemic to southwestern China, was sequenced to be 155,818 bp in length, including two inverted repeat (IR, 26,128 bp) regions, one large single-copy region (LSC) and one small single-copy region (SSC) of 86,555 bp and 17,007 bp, respectively. The cp genome has 131 annotated genes, including 85 protein-coding genes, 37 tRNA genes, 8 rRNA genes, and a pseudogene (ycf1). The overall GC content of it is 38.1%. Phylogenetic analysis revealed that the cp genome of A. austroyunnanense is closely related to that of Aconitum hemsleyanum.

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A comparison of chloroplast genome sequences in Aconitum (Ranunculaceae): a traditional herbal medicinal genus.

Project description:The herbal medicinal genus Aconitum L., belonging to the Ranunculaceae family, represents the earliest diverging lineage within the eudicots. It currently comprises of two subgenera, A. subgenus Lycoctonum and A. subg. Aconitum. The complete chloroplast (cp) genome sequences were characterized in three species: A. angustius, A. finetianum, and A. sinomontanum in subg. Lycoctonum and compared to other Aconitum species to clarify their phylogenetic relationship and provide molecular information for utilization of Aconitum species particularly in Eastern Asia. The length of the chloroplast genome sequences were 156,109 bp in A. angustius, 155,625 bp in A. finetianum and 157,215 bp in A. sinomontanum, with each species possessing 126 genes with 84 protein coding genes (PCGs). While genomic rearrangements were absent, structural variation was detected in the LSC/IR/SSC boundaries. Five pseudogenes were identified, among which ?rps19 and ?ycf1 were in the LSC/IR/SSC boundaries, ?rps16 and ?infA in the LSC region, and ?ycf15 in the IRb region. The nucleotide variability (Pi) of Aconitum was estimated to be 0.00549, with comparably higher variations in the LSC and SSC than the IR regions. Eight intergenic regions were revealed to be highly variable and a total of 58-62 simple sequence repeats (SSRs) were detected in all three species. More than 80% of SSRs were present in the LSC region. Altogether, 64.41% and 46.81% of SSRs are mononucleotides in subg. Lycoctonum and subg. Aconitum, respectively, while a higher percentage of di-, tri-, tetra-, and penta- SSRs were present in subg. Aconitum. Most species of subg. Aconitum in Eastern Asia were first used for phylogenetic analyses. The availability of the complete cp genome sequences of these species in subg. Lycoctonum will benefit future phylogenetic analyses and aid in germplasm utilization in Aconitum species.

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Complete chloroplast genome of medicinal plant Aconitum carmichaelii: genome characterization and phylogenetic analysis.

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The complete chloroplast genome of Aconitum scaposum.

Project description:Aconitum scaposum Franch 1894 belongs to the Genus Aconitum and Subgenus Lycoctonum (Ranunculaceae). It is widely distributed in China and adjacent areas, used as herbal medicine and had highy toxic components. This species has little reasearch information, especially its chloroplast (cp) genome information being unclear. Therefore, with the method of high salt and low pH to extract the cp of A. scaposum, we sequenced and assembled the complete cp genome of A. scaposum using Illumina high-throughput sequencing platform. The results showed the cp genome of A. scaposum was 157 688 bp in length, including a pair of inverted repeated regions (IRa 26 156 bp and IRb 26 232 bp, respectively), large single copy region (LSC 69 309 bp) and small single copy region (SSC 16 917 bp). And cp genome of A. scaposum consisted of 145 unique genes, 8 ribosomal RNA (rRNA) genes and 38 transfer RNA (tRNA) genes, with GC content was 38%. Meanwhile, based on the cp complete genome, we performed the phylogenetic tree of 66 species with maximum likelihood (ML) method, respectively. Among them, we selected one Delphinium species as the outgroup and the bootstrap of each braches were greater than 90%. The results indicated that the phylogenetic relationship of A. scaposum was relatively closely related to A. scaposum var. vaginatum compared to other Aconitum species.

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