Plastome comparison and phylogenomics of Chinese endemic Schnabelia (Lamiaceae): insights into plastome evolution and species divergence

BMC Plant Biology, Journal Year: 2025, Volume and Issue: 25(1)

Published: May 7, 2025

Schnabelia species, herbaceous perennial plants within the Lamiaceae family, possess medicinal value and are endemic to China. While previous studies have focused on morphological classification, molecular systematics, components, there has been limited research phylogenomics. To reveal their plastid genome characteristics phylogenetic relationships, we sequenced assembled plastomes of all five species (S. oligophylla, S. tetrodonta, nepetifolia, terniflora, aureoglandulosa), conducted comparative genomic analyses, constructed a tree incorporating closely related taxa in subfamily Ajugoideae, as well conducting divergence time estimation. Plastome size ranged from 155,733 bp 156,944 bp, encompassing 115 unique genes, with GC content 37.8% same for species. Five intergenic spacer regions (trnH-GUG-psbA, trnK-UUU-matK, petB-petD, ndhD-psaC, ndhA-ndhH) were identified hotspots. Gene selection pressure analysis demonstrated that genes under negative selection. Phylogenetic relationship Ajugoideae based confirmed monophyly Schnabelia. Two clades supported, one containing two original other comprising three transferred Caryopteris. The stem age is estimated be approximately 30.24 Ma, split Sections occurring around 12.60 Ma. We revealed evolutionary features genus highly variable can provide tool future identification these plants. diversification during middle Miocene Quaternary suggests historical geological climatic shifts facilitated differentiation. These findings enhance our understanding Schnabelia's evolution support chloroplast diversity, aiding conservation sustainable use.

Language: Английский

The complete chloroplast genome sequences of 11 Panax species: Providing insights for evolution and species identification

Industrial Crops and Products, Journal Year: 2024, Volume and Issue: 223, P. 120160 - 120160

Published: Dec. 10, 2024

Language: Английский

Exploring the phylogenetic framework and trait evolution of Impatiens through chloroplast genome analysis

BMC Plant Biology, Journal Year: 2024, Volume and Issue: 24(1)

Published: Dec. 20, 2024

The genus Impatiens, which includes both annual and perennial herbs, holds considerable ornamental, economic, medicinal value. However, it posed significant challenges for taxonomic systematic reconstruction. This was largely attributed to its high intraspecific diversity low interspecific variation in morphological characteristics. In this study, we sequenced samples from 12 Impatiens species native China assessed their phylogenetic resolution using the complete chloroplast genome, conjunction with published of Impatiens. addition, a comparative analysis genomes were conducted explore evolution genome exhibited similarity previously terms size, gene content, sequence. typical four-part structure, lengths ranging 146,987 bp(I. morsei)- 152,872 jinpingensis). Our results identified 10 mutant hotspot regions (rps16, rps16-trnG, trnS-trnR, rpoB-trnC) that could serve as effective molecular markers analyses identification within Phylogenetic supported classification monophyletic taxon. affinities subgenus Clavicarpa being first taxon diverge. tree,the divided into eight distinct clades. ancestral trait reconstruction suggested traits included life cycle, four sepals three pollen grooves. morphology regarding fruit shape, flower colour, spacing length remained ambiguous. study family-level treatment demonstrated utility whole sequences resolution. Comparative facilitated development markers.The showed ancestor type habit perennial, number 4, aperture 3 colpus. capsule spur underwent complex evolutionary process. provided data support further studies some important new insights

Language: Английский