Organelle genomes of two Scaevola species, S. taccada and S. hainanensis, provide new insights into evolutionary divergence between Scaevola and its related species DOI Creative Commons

Danni Meng,

Tianxin Lu,

Meng He

и другие.

Frontiers in Plant Science, Год журнала: 2025, Номер 16

Опубликована: Апрель 24, 2025

Chloroplast and mitochondrial genomes harbor crucial information that can be utilized for elucidating plant evolution environmental adaptation. The organellar genomic characteristics of Goodeniaceae, a sister family to Asteraceae, remain unexplored. Here, using combination short-read long-read sequencing technologies, we successfully assembled the complete two Goodeniaceae species native China, Scaevola taccada S. hainanensis. genome collinearity analysis revealed expanded its length through inverted repeat expansion large single copy fragment duplication, resulting in 181,022 bp (S. taccada) 182,726 hainanensis), ~30 kb increase compared related species. Mitochondrial exhibit multi-ring topology, forming dual chromosomes 314,251 276,175 hainanensis). Sequence variation demonstrated substantial chloroplast sequence divergence (Pi = 0.45) an gene number within genus. Relative synonymous codon usage (RSCU) has higher bias A/U-ending codons than mitochondria, with chloroplasts RSCU values ranging from 0.32 1.94, whereas 0.38 1.62. Phylogenetic analyses support monophyly Asteraceae-Goodeniaceae group, extended evolutionary branches Scaevola, coupled analysis, indicate rapid Scaevola. Organellar-nuclear horizontal transfer identified specific increased numbers photosynthesis-related genes chloroplast-nuclear events taccada. Our study not only provides insights understanding adaptation mechanisms coastal plants, but also contributes Goodeniaceae.

Язык: Английский

Organelle genomes of two Scaevola species, S. taccada and S. hainanensis, provide new insights into evolutionary divergence between Scaevola and its related species DOI Creative Commons

Danni Meng,

Tianxin Lu,

Meng He

и другие.

Frontiers in Plant Science, Год журнала: 2025, Номер 16

Опубликована: Апрель 24, 2025

Chloroplast and mitochondrial genomes harbor crucial information that can be utilized for elucidating plant evolution environmental adaptation. The organellar genomic characteristics of Goodeniaceae, a sister family to Asteraceae, remain unexplored. Here, using combination short-read long-read sequencing technologies, we successfully assembled the complete two Goodeniaceae species native China, Scaevola taccada S. hainanensis. genome collinearity analysis revealed expanded its length through inverted repeat expansion large single copy fragment duplication, resulting in 181,022 bp (S. taccada) 182,726 hainanensis), ~30 kb increase compared related species. Mitochondrial exhibit multi-ring topology, forming dual chromosomes 314,251 276,175 hainanensis). Sequence variation demonstrated substantial chloroplast sequence divergence (Pi = 0.45) an gene number within genus. Relative synonymous codon usage (RSCU) has higher bias A/U-ending codons than mitochondria, with chloroplasts RSCU values ranging from 0.32 1.94, whereas 0.38 1.62. Phylogenetic analyses support monophyly Asteraceae-Goodeniaceae group, extended evolutionary branches Scaevola, coupled analysis, indicate rapid Scaevola. Organellar-nuclear horizontal transfer identified specific increased numbers photosynthesis-related genes chloroplast-nuclear events taccada. Our study not only provides insights understanding adaptation mechanisms coastal plants, but also contributes Goodeniaceae.

Язык: Английский

Процитировано

0