ArticleScientific reports2026
Comparative genomic and phylogenetic analyses of the mitogenome of Graptopetalum Paraguayense (N. E. Br.) Walth. 1938.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- The complete mitochondrial genome ofMitochondrial DNA. Part B, Resources · 2026Article
- The complete mitochondrial genome and phylogenetic analysis ofFrontiers in plant science · 2026Article
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7 authors.
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Abstract
Graptopetalum paraguayense is a perennial succulent plant with ornamental, ecological, and medicinal value. Here, we present the first complete mitogenome of G. paraguayense, assembled as a circular molecule of 242,059 bp with a GC content of 43.65%. The genome contains 50 genes, including 31 protein-coding genes (PCGs), 13 tRNAs, 3 rRNAs, and 3 pseudogenes. A total of 599 RNA editing sites were identified, with a predominant effect of altering amino acid hydrophobicity (47.41% were hydrophilic-to-hydrophobic conversions). Codon usage bias analysis revealed a preference for GCU (Ala), CGA (Arg), and UUA (Leu), with the stop codon UAA exhibiting the highest RSCU value (1.94). A total of 122 repetitive sequences were identified, comprising 59 simple sequence repeats (SSRs), 1 tandem repeat, and 62 dispersed repeats. Evolutionary analysis indicated positive selection on ccmB and nad7 genes, while the majority of PCGs were under purifying selection. The mitogenome of G. paraguayense shared 57.28% sequence similarity with that of Sedum plumbizincicola. We also found evidence of chloroplast-to-mitochondrial DNA transfer, involving genes such as psaC, ndhE, ndhG, ndhI, ndhA, and ndhH. Comparative analyses identified eleven divergent hotspot regions: atp9, atp8, rpl5, cox2, ccmFn, rps7, ccmC, ccmFc, mttB, nad6, and rps13. Phylogenetic analysis confirmed the placement of G. paraguayense within the Acre clade of Crassulaceae, showing a sister relationship with S. plumbizincicola. Our study not only provides the first mitochondrial genomic resource for G. paraguayense but also reveals potential adaptive evolution through positive selection and interorganellar gene transfer, offering new perspectives on mitogenome plasticity in succulent plants.
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