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Two complete chloroplast genome sequences of genus Paulownia (Paulowniaceae): Paulownia coreana and P. tomentosa.

ABSTRACT: The nucleotide sequence of the two chloroplast (cp) genomes from Paulownia coreana and P. tomentosa are the first to be completed in genus Paulownia of family Paulowniaceae. The structure of two Paulownia cp genomes shows similar characteristic with general cp genome of angiosperms. The lengths of two cp genomes are 154,545?bp and 154,540?bp, respectively. The cp genomes are divided into LSC region (85,241?bp and 85,236?bp) and SSC region (17,736?bp and 17,736?bp) by two IR regions (25,784?bp and 25,784?bp). Both of two cp genomes contain 113 genes (79 protein coding genes, 30 tRNA genes and 4 rRNA genes), eight protein-coding genes, seven tRNA genes and four rRNA genes duplicated in the IR regions. Similar to the general cp genome of angiosperms, 18 of the genes in the two cp genomes have one or two introns. The overall A-T contents of two genomes are 62.0% which is similar with general angiosperms. The A-T content in the non-coding (64.6%) is higher than in the coding (60.1%) regions. Seventy-one and seventy simple sequence repeat (SSR) loci were identified in the P. coreana and P. tomentosa cp genomes, respectively. In phylogenetic analysis, genus Paulownia shows closed relationship with Lindenbergia philippensis of Orobanchaceae.

SUBMITTER: Yi DK

PROVIDER: S-EPMC7800411 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature

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Two complete chloroplast genome sequences of genus Paulownia (Paulowniaceae): Paulownia coreana and P. tomentosa.

Yi Dong-Keun DK Kim Ki-Joong KJ

Mitochondrial DNA. Part B, Resources 20160905 1

The nucleotide sequence of the two chloroplast (cp) genomes from Paulownia coreana and P. tomentosa are the first to be completed in genus Paulownia of family Paulowniaceae. The structure of two Paulownia cp genomes shows similar characteristic with general cp genome of angiosperms. The lengths of two cp genomes are 154,545 bp and 154,540 bp, respectively. The cp genomes are divided into LSC region (85,241 bp and 85,236 bp) and SSC region (17,736 bp and 17,736 bp) by two IR ...[more]

PMID: 33473576

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Project description:Genomic events including gene loss, duplication, pseudogenization and rearrangement in plant genomes are valuable sources for exploring and understanding the process of evolution in angiosperms. The family Melanthiaceae is distributed in temperate regions of the Northern Hemisphere and divided into five tribes (Heloniadeae, Chionographideae, Xerophylleae, Melanthieae and Parideae) based on the molecular phylogenetic analyses. At present, complete chloroplast genomes of the Melanthiaceae have been reported from three species. In the previous genomic study of Liliales, atrnI-CAU gene duplication event was reported fromParis verticillata, a member of Parideae. To clarify the significant genomic events of the tribe Parideae, we analysed the complete chloroplast genome sequences of twoTrilliumspecies representing two subgenera:TrilliumandPhyllantherum InTrillium tschonoskii(subgenusTrillium), the circular double-stranded cpDNA sequence of 156 852 bp consists of two inverted repeat (IR) regions of 26 501 bp each, a large single-copy (LSC) region of 83 981 bp and a small single-copy (SSC) region of 19 869 bp. The chloroplast genome sequence ofT. maculatum(subgenusPhyllantherum) is 157 359 bp in length, consisting of two IRs (25 535 bp), one SSC (19 949 bp) and one LSC (86 340 bp), and is longer than that ofT. tschonoskii The results showed that the cpDNAs of Parideae are highly conserved across genome structure, gene order and contents. However, the chloroplast genome ofT. maculatumcontained a 3.4-kb inverted sequence betweenndhCandrbcLin the LSC region, and it was a unique feature for subgeneraPhyllantherum In addition, we found three different types of gene duplication in the intergenic spacer betweenrpl23andycf2containingtrnI-CAU, which were in agreement with the circumscription of subgenera and sections in Parideae excludingT. govanianum These genomic features provide informative molecular markers for identifying the infrageneric taxa ofTrilliumand improve our understanding of the evolution patterns of Parideae in Melanthiaceae.

Dataset Information

Two complete chloroplast genome sequences of genus Paulownia (Paulowniaceae): Paulownia coreana and P. tomentosa.

Publications

Two complete chloroplast genome sequences of genus <i>Paulownia</i> (Paulowniaceae): <i>Paulownia coreana</i> and <i>P. tomentosa</i>.

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