دورية أكاديمية
أعرض في EDS

Comparative structure and evolution of the organellar genomes of Padina usoehtunii (Dictyotales) with the brown algal crown radiation clade.

التفاصيل البيبلوغرافية
العنوان: Comparative structure and evolution of the organellar genomes of Padina usoehtunii (Dictyotales) with the brown algal crown radiation clade.
المؤلفون: Liu YJ; Ocean School, Yantai University, Yantai, 264005, China., Zhang TY; Ocean School, Yantai University, Yantai, 264005, China., Wang QQ; Ocean School, Yantai University, Yantai, 264005, China., Draisma SGA; Excellence Center for Biodiversity of Peninsular Thailand, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand. stefano.a@psu.ac.th., Hu ZM; Ocean School, Yantai University, Yantai, 264005, China. huzimin9712@163.com.
المصدر: BMC genomics [BMC Genomics] 2024 Jul 31; Vol. 25 (1), pp. 747. Date of Electronic Publication: 2024 Jul 31.
نوع المنشور: Journal Article; Comparative Study
اللغة: English
بيانات الدورية: Publisher: BioMed Central Country of Publication: England NLM ID: 100965258 Publication Model: Electronic Cited Medium: Internet ISSN: 1471-2164 (Electronic) Linking ISSN: 14712164 NLM ISO Abbreviation: BMC Genomics Subsets: MEDLINE
أسماء مطبوعة: Original Publication: London : BioMed Central, [2000-
مواضيع طبية MeSH: Phaeophyceae*/genetics , Phylogeny* , Evolution, Molecular* , Genome, Chloroplast*, Genome, Mitochondrial ; Inverted Repeat Sequences/genetics ; Chloroplasts/genetics
مستخلص: Background: Organellar genomes have become increasingly essential for studying genetic diversity, phylogenetics, and evolutionary histories of seaweeds. The order Dictyotales (Dictyotophycidae), a highly diverse lineage within the Phaeophyceae, is long-term characterized by a scarcity of organellar genome datasets compared to orders of the brown algal crown radiation (Fucophycidae).
Results: We sequenced the organellar genomes of Padina usoehtunii, a representative of the order Dictyotales, to investigate the structural and evolutionary differences by comparing to five other major brown algal orders. Our results confirmed previously reported findings that the rate of structural rearrangements in chloroplast genomes is higher than that in mitochondria, whereas mitochondrial sequences exhibited a higher substitution rate compared to chloroplasts. Such evolutionary patterns contrast with land plants and green algae. The expansion and contraction of the inverted repeat (IR) region in the chloroplast correlated with the changes in the number of boundary genes. Specifically, the size of the IR region influenced the position of the boundary gene rpl21, with complete rpl21 genes found within the IR region in Dictyotales, Sphacelariales and Ectocarpales, while the rpl21 genes in Desmarestiales, Fucales, and Laminariales span both the IR and short single copy (SSC) regions. The absence of the rbcR gene in the Dictyotales may indicate an endosymbiotic transfer from the chloroplast to the nuclear genome. Inversion of the SSC region occurred at least twice in brown algae. Once in a lineage only represented by the Ectocarpales in the present study and once in a lineage only represented by the Fucales. Photosystem genes in the chloroplasts experienced the strongest signature of purifying selection, while ribosomal protein genes in both chloroplasts and mitochondria underwent a potential weak purifying selection.
Conclusions: Variations in chloroplast genome structure among different brown algal orders are evolutionarily linked to their phylogenetic positions in the Phaeophyceae tree. Chloroplast genomes harbor more structural rearrangements than the mitochondria, despite mitochondrial genes exhibiting faster mutation rates. The position and the change in the number of boundary genes likely shaped the IR regions in the chloroplast, and the produced structural variability is important mechanistically to create gene diversity in brown algal chloroplast.
(© 2024. The Author(s).)
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فهرسة مساهمة: Keywords: Padina usoehtunii; Chloroplast genome; Dictyotales; Mitochondrial genome; Phaeophyceae; Phylogeny; Sequence variation; Structural variation
تواريخ الأحداث: Date Created: 20240730 Date Completed: 20240731 Latest Revision: 20240802
رمز التحديث: 20240802
مُعرف محوري في PubMed: PMC11290263
DOI: 10.1186/s12864-024-10616-4
PMID: 39080531
قاعدة البيانات: MEDLINE
الوصف
تدمد:1471-2164
DOI:10.1186/s12864-024-10616-4