1. Intracellular gene transfer (IGT) events from the mitochondrial genome to the plastid genome of the subtribe ferulinae drude (Apiaceae) and their implications.
- Author
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Jo S, Park M, Yusupov Z, Tojibaev KS, Kenicer GJ, Choi S, and Paik JH
- Subjects
- Evolution, Molecular, Genome, Plastid, Genome, Mitochondrial, Phylogeny, Apiaceae genetics
- Abstract
Background: Intracellular gene transfer (IGT) is a phenomenon in genome evolution that occurs between the nuclear and organellar genomes of plants or between the genomes of different organelles. The majority of the plastid genomes (plastomes) in angiosperms have a conserved structure, but some species exhibit unexpected structural variations., Results: In this study, we focused on the Ferulinae, which includes Ferula, one of the largest genera in the Apiaceae family. We discovered IGTs in the rps12-trnV IGS region of the plastome's inverted repeat (IR). We found that partial mitochondrial genome (mitogenome) sequences, ranging in length from about 2.8 to 5.8 kb, were imported into the plastome. In addition to these, that are known from other Scandiceae subtribes, the Ferulinae plastomes contained two unique mitogenome sequences. We have named these sequences Ferula Mitochondrial Plastid sequences (FeMP). FeMP1 varies in length from 336 bp to 1,100 bp, while FeMP2 ranges from 50 bp to 740 bp in length, with the exception of F. conocaula and F. kingdon-wardii, which do not possess FeMP2. Notably, FeMP2 includes a complete rps7 gene of mitogenome origin. In the maximum likelihood (ML) tree constructed from 79 protein-coding genes, Ferulinae appears as a monophyletic group, while Ferula shows paraphyly. Dorema and Fergania are nested within the Ferula clade, sharing the unusual characteristics of the Ferula plastome. Based on these findings, a reclassification of Dorema and Fergania is warranted., Conclusions: Our results shed light on the mechanism of plastome evolution in the Scandiceae with a focus on the unique plastome structure found in the Apiaceae. These findings enhance our understanding of the evolution of plant organellar genomes., Competing Interests: Declarations. Ethics approval and consent to participate: The sample collections completely compiles with the Regulations on the Protection and Management of Wild Plants of the Uzbekistan. All samples were collected from various locations in Uzbekistan. Since they are not a protected species, they do not require special collection permits. Dr. Yusupov and Dr. Tojibaev formally identified the plant materials used in this study. All the experimental studies on the plants, including collection of the material, complied with institutional, national, and international guidelines. Consent for publication: Not applicable. Competing interests: The authors declare no competing interests., (© 2024. The Author(s).)
- Published
- 2024
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