The Mitochondrial Genome of Curcuma longa: A Large and Structurally Complex Genome with Extensive Intracellular DNA Transfer
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Le résumé fourni par la source
Background: Plant mitochondrial genomes exhibit extreme variation in size and structure while maintaining a conserved set of core protein-coding genes. This combination of structural diversity and functional conservation provides valuable insights into evolutionary processes such as genome expansion, rearrangement, and intracellular DNA transfer. Curcuma longa, an economically and medicinally important species in the genus Curcuma (Zingiberaceae), has not yet been studied in terms of the organization and evolution of its mitochondrial genome. Methods: In this study, we assembled and annotated the mitochondrial and plastid genomes of C. longa using third-generation HiFi sequencing data, systematically analyzing their genomic structure, repetitive sequence content, and features of sequence transfer between nuclear and organellar genomes. Results: The mitochondrial genome of C. longa was assembled as a complex, network-like structure consisting of 12 contigs with a total length of approximately 7.7 Mb, making it one of the largest mitochondrial genomes reported in monocots to date. Comparative analysis revealed significant differences in repeat types, abundance, and length distribution between the two organellar genomes. Additionally, extensive intracellular DNA transfer events were identified among the nuclear, mitochondrial, and plastid genomes. Conclusions: Overall, this study provides the first comprehensive report on the giant mitochondrial genome of C. longa, detailing its structural organization, repeat content, and intergenomic transfers. These findings lay a foundation for understanding mitochondrial genome evolution in Curcuma and offer broader insights into the mechanisms driving extreme mitochondrial genome expansion in angiosperms and monocots specifically.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- The Mitochondrial Genome of Curcuma longa: A Large and Structurally Complex Genome with Extensive Intracellular DNA Transfer
- Date Crossref
- 19/02/2026
- Éditeur
- MDPI AG
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Shanxi Agricultural University pays non établi dans la noticeUniversité ou école supérieure
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Agricultural Genomics Institute at Shenzhen pays non établi dans la noticeStructure de recherche
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Colorado State University Department of Agricultural Biology pays non établi dans la noticeUniversité ou école supérieure
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Shenzhen University pays non établi dans la noticeUniversité ou école supérieure
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College of Horticulture pays non établi dans la noticeUniversité ou école supérieure
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Guangdong Laboratory of Lingnan Modern Agriculture Shenzhen Branch pays non établi dans la noticeStructure de recherche
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College of Life Sciences and Oceanography Guangdong Provincial Key Laboratory for Plant Epigenetics pays non établi dans la noticeUniversité ou école supérieure
Shanxi Agricultural University, Agricultural Genomics Institute at Shenzhen et Department of Agricultural Biology — Colorado State University, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.