The chromosome-scale genome of Phoebe bournei reveals contrasting fates of terpene synthase (TPS)-a and TPS-b subfamilies

Plant Communications, Journal Year: 2022, Volume and Issue: 3(6), P. 100410 - 100410

Published: July 16, 2022

Language: Английский

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Comparison of the complete plastomes and the phylogenetic analysis of Paulownia species

Scientific Reports, Journal Year: 2020, Volume and Issue: 10(1)

Published: Feb. 10, 2020

Abstract Paulownia species are important ecological, economic and ornamental species, but their phylogenetic relationship remains unclear, which seriously affects the development utilization of these resources. The complete chloroplast genomes six were assembled by next-generation sequencing data. By adding two known to genomes, we performed comparative analysis tree reconstruction . results indicated that ranged in size from 154,107 154,694 bp. These contained 117 unique functional genes, including 80 protein-coding four rRNA 33 tRNA genes. Twelve hotspot regions, five genes seven noncoding identified showed high levels sequence variation. Additionally, positive selection was observed three rps2 , rbcL ndhG maximum likelihood (ML) Bayesian (BI) strongly supported monophyletic origin clustered into major clades: One clade included P. coreana tomentosa kawakamii while other comprised 5 fargesii australis This study provides useful genetic information for reconstruction, taxonomic discrepancies, studying evolution phylogeography

Language: Английский

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Phylogenomic insights into the reticulate evolution of Camellia sect. Paracamellia Sealy (Theaceae)

Journal of Systematics and Evolution, Journal Year: 2023, Volume and Issue: 62(1), P. 38 - 54

Published: Jan. 12, 2023

Abstract Polyploids are common in Camellia sect. Paracamellia , which contain many important oil crop species. However, their complex evolutionary history is largely unclear. In this study, 22 transcriptomes and 19 plastomes of related species were sequenced assembled, providing the most completed taxa sampling Oleifera C . Phylogenetic trees reconstructed with predicted single‐copy nuclear genes plastomes. demonstrated that should be merged into Cytonuclear discordance network analyses suggested hybridizations among polyploid relatives. The divergence major clades was dated to during middle late Miocene from ancestral Lingnan region, a rapid diversification Quaternary found, probably through hybridization polyploidization. tetraploid meiocarpa Hu may have originated between closely diploid hexaploid oleifera C. Abel (e.g., ) octoploid vietnamensis T. Huang ex could Hybridization polyploidization played an role generating rich variation fruit traits, especially increased size

Language: Английский

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Climate change impacts the distribution of Quercus section Cyclobalanopsis (Fagaceae), a keystone lineage in East Asian evergreen broadleaved forests

Plant Diversity, Journal Year: 2023, Volume and Issue: 45(5), P. 552 - 568

Published: April 6, 2023

East Asian evergreen broadleaved forests (EBFLs) harbor high species richness, but these ecosystems are severely impacted by global climate change and deforestation. Conserving managing EBLFs requires understanding dominant tree distribution dynamics. In this study, we used 29 in Quercus section Cyclobalanopsis-a keystone lineage EBLFs-as proxies to predict EBLF dynamics using models (SDMs). We examined climatic niche overlap, similarity, equivalency among seven biogeographical regions' 'ecospat'. also estimated the effectiveness of protected areas predicted range elucidate priority conservation regions. Our results showed that niches most geographical groups differ. The western under Indian summer monsoon regime were mainly temperature factors, whereas precipitation eastern regime. simulation a northward expansion Cyclobalanopsis between 2081 2100, except for ranges three Himalayan analyzed, which might shrink significantly. greatest shift highly suitable was South Pacific, with centroid over 300 km. Remarkably, only 7.56% habitat is currently inside areas, percentage continue declining future. To better conserve EBLFs, establishing nature reserves their northern ranges, transplanting populations decreasing numbers degraded habitats future should be high-priority objectives.

Language: Английский

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Differential distribution shifts in two subregions of East Asian subtropical evergreen broadleaved forests—a case of Magnoliaceae

Frontiers in Plant Science, Journal Year: 2024, Volume and Issue: 14

Published: Jan. 23, 2024

Aim East Asian subtropical evergreen broad-leaved forests (EBLFs) are composed of western and eastern subregions with different topographical environmental conditions. The distribution shifts over time plants in the two predicted to be different, but difference has seldom been investigated. Methods Potential distributions 53 Magnoliaceae species (22 31 subregion) during last glacial maximum (LGM), present, 2070s were using MaxEnt based on 58 variables. changes range size centroid analyzed. Species-level potential habitats overlaid uncover diversity distribution, discover long-term refugia. Results At significantly larger than those shown by occurrence points. During LGM, 20/22 subregion experienced increases through downwards southward migrations, while decreases (27/31 species) accompanied northward eastward migrations. In future, declines will both found; northwestward exist most (20/22 subregion, northwest- northeastward occur subregion. hotspots a slight shift past upwards mountain region future subregion; shrinks occurred China all regions future. Long-term refugia-preserving was found mountains across entire EBLFs region. Main conclusions Significant differences from present similar revealed subregions. Species no significant could preserved mountainous throughout EBLFs.

Language: Английский

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Deciphering the evolutionary imprints of Camellia oleifera Abel.: delineating its distinct phylogeographic structure and demographic history through microsatellite and plastid fragment

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

Published: April 25, 2025

Investigating the population structure and demographic history is crucial for elucidating evolutionary imprints of a species laying foundation effective utilization its germplasm. Camellia oleifera Abel., traditional woody oil-producing species, widely distributed in south Yangtze River China. However, phylogeography genetic diversity wild remain poorly understood. Data 20 simple sequence repeat (SSR) markers two chloroplast DNA (cpDNA) fragments was generated to assess variation differentiation across 33 natural populations. The integrated Approximate Bayesian Computation (ABC) ecological niche modeling (ENM) were utilized analyze history. analysis revealed high at level significant within populations both SSR cpDNA datasets. evidence based on indicated no noteworthy divergence phylogeographical structure. Haplotype phylogenetic analyses suggest that temporal pattern diversification likely associated with abrupt uplift Hengduan Mountains adjacent regions (HMR) during late Miocene Pliocene. In contrast, data discernible geographic pattern: divided into lineage regions, namely HMR Central-East identification potential refugia C. LGM, southeastern China, achieved through comprehensive combining ENM analysis. presence distinct patterns observed makers may account divergent hereditary characteristics between nuclear genomes, resulting disparate phylogeographic patterns. Nanling mountain range regarded as dispersal conduit facilitated gene flow refugia, leading extensive distribution stable trajectory oleifera. These methods findings can provide reference uncovering perennial oil crops facilitate resources breeding.

Language: Английский

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Opening a door to the spatiotemporal history of plants from the tropical Indochina Peninsula to subtropical China

Molecular Phylogenetics and Evolution, Journal Year: 2022, Volume and Issue: 171, P. 107458 - 107458

Published: March 27, 2022

Language: Английский

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Phylogeography and genetic diversity of Ulmus elongata (Ulmaceae), a Tertiary relict tree with extremely small populations (PSESP)

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

Published: Jan. 16, 2025

Assessing the current status and identifying mechanisms threatening endangered plants are significant challenges fundamental to biodiversity conservation, particularly for protecting Tertiary relict trees plant species with extremely small populations (PSESP). Ulmus elongata (Ulmus, Ulmaceae) high values ornamental application, is a tree one of members from PSESP in China. Currently, wild U. have been threatened by excessive deforestation urbanization, but limited knowledges its genetic diversity seriously hinder conservation efforts. Therefore, further study on drivers pattern crucial preserving resources can serve as reference other under climate change. Here, total 12 70 individuals were collected covering geographical distribution Utilizing chloroplast genome datasets, we found that exhibited remarkably low nucleotide gene flow (π = 0.00013, Nm 0.03). Analysis molecular variance (AMOVA) showed variation occurs mainly between eight clades (60.95%). The Mantel tests indicated correlation differentiation distances (r 0.3777, p < 0.05) populations. A notable phylogeographic structure was identified elongata, comprising distinct haplogroups (NST 0.917, GST 0.876, 0.05), which attributed global cooling East Asia Quaternary oscillations. Overall, our using representative supported hypothesis belonging simultaneously exhibits significantly lower compared those either or individually. Furthermore, be primarily ascribed combination factors, including habitat fragmentation resulting human activities, contraction during LGM population sizes. This provides foundation guiding efforts implementing management strategies PSESP. Our findings also provide evidence important roles Asian monsoon system oscillations shaping subtropical broad-leaved forests.

Language: Английский

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Speciation and hybridization of Enkianthus quinqueflorus and E. serrulatus (Ericaceae) across a tropical–subtropical transitional zone in South China

Botanical Journal of the Linnean Society, Journal Year: 2025, Volume and Issue: unknown

Published: March 29, 2025

Abstract How speciation and hybridization occur across steep environmental gradients has fascinated ecologists evolutionary biologists for decades. Enkianthus quinqueflorus E. serrulatus are a species pair located on the two sides of Nanling Mountains, previously proposed tropical–subtropical transitional zone (ecotone) south China. In this study, we investigated its history based DNA sequences four chloroplast inter-genic spacers eight nuclear genes from 44 populations. Phylogenetic analyses found clear cytonuclear discordance, indicating some (EquiN) populations were hybrid origin, largely corresponding to serotinus (especially tubulatus). Approximate Bayesian computation (ABC) analysis that EquiN derived between other cluster (EquiS) at 0.22 Mya after an initial split 0.93 Mya, was also confirmed by IMa2. Ecological niche modelling indicated EquiS had distinct ecological niches but with overlapped distribution late Quaternary. These results, coupled morphological intermediacy tubulatus, clearly suggest may be products allopatric associated refugial isolation during Cenozoic climate changes, tubulatus could have resulted second contact around Mountains serrulatus. This study suggests hotspot woody flowering plants, represent in China, least terms plant divergence speciation.

Language: Английский

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Global advances in phylogeny, taxonomy and biogeography of Lauraceae

Plant Diversity, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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