The complete chloroplast genome of Stryphnodendron adstringens (Leguminosae - Caesalpinioideae): comparative analysis with related Mimosoid species
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2019
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Stryphnodendron adstringens is a medicinal plant belonging to the Leguminosae family, and it is
commonly found in the southeastern savannas, endemic to the Cerrado biome. The goal of this study
was to assemble and annotate the chloroplast genome of S. adstringens and to compare it with
previously known genomes of the mimosoid clade within Leguminosae. The chloroplast genome was
reconstructed using de novo and referenced-based assembly of paired-end reads generated by shotgun
sequencing of total genomic DNA. The size of the S. adstringens chloroplast genome was 162,169 bp.
This genome included a large single-copy (LSC) region of 91,045 bp, a small single-copy (SSC) region of
19,014 bp and a pair of inverted repeats (IRa and IRb) of 26,055 bp each. The S. adstringens chloroplast
genome contains a total of 111 functional genes, including 77 protein-coding genes, 30 transfer RNA
genes, and 4 ribosomal RNA genes. A total of 137 SSRs and 42 repeat structures were identified in S.
adstringens chloroplast genome, with the highest proportion in the LSC region. A comparison of the S.
adstringens chloroplast genome with those from other mimosoid species indicated that gene content
and synteny are highly conserved in the clade. The phylogenetic reconstruction using 73 conserved
coding-protein genes from 19 Leguminosae species was supported to be paraphyletic. Furthermore, the
noncoding and coding regions with high nucleotide diversity may supply valuable markers for molecular
evolutionary and phylogenetic studies at different taxonomic levels in this group.
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SOUZA, Ueric José Borges de et al. The complete chloroplast genome of Stryphnodendron adstringens (Leguminosae - Caesalpinioideae): comparative analysis with related Mimosoid species. Scientific Reports, London, v. 9, p. 14206-14216, 2019.