Botanical Journal of the Linnean Society最新文献_第6页

A molecular phylogeny of the early-branching Genistoid lineages of papilionoid legumes reveals a new Amazonian genus segregated from Clathrotropis 一种早期分支的乳突豆科植物Genistoid谱系的分子系统发育揭示了一个新的亚马逊属，从拟羊腿豆科植物分离出来

2区生物学

Botanical Journal of the Linnean Society Pub Date : 2023-11-03 DOI: 10.1093/botlinnean/boad059

Bernarda de S Gregório, Catarina S Carvalho, Gustavo Ramos, Lamarck Rocha, Charles H Stirton, Haroldo C de Lima, Charles E Zartman, Gwilym P Lewis, Benjamin M Torke, Cristiane Snak, Heriberto A D Higuita, Luciano P de Queiroz, Domingos Cardoso

{"title":"A molecular phylogeny of the early-branching Genistoid lineages of papilionoid legumes reveals a new Amazonian genus segregated from Clathrotropis","authors":"Bernarda de S Gregório, Catarina S Carvalho, Gustavo Ramos, Lamarck Rocha, Charles H Stirton, Haroldo C de Lima, Charles E Zartman, Gwilym P Lewis, Benjamin M Torke, Cristiane Snak, Heriberto A D Higuita, Luciano P de Queiroz, Domingos Cardoso","doi":"10.1093/botlinnean/boad059","DOIUrl":"https://doi.org/10.1093/botlinnean/boad059","url":null,"abstract":"Abstract Molecular phylogenetic studies focused on the early-branching papilionoid legumes have revealed many new clades and supported several generic realignments, yet the monophyly of some of the constituent genera has remained unassessed. This is the case for the Amazonian genus Clathrotropis of the tribe Ormosieae. The genus, as traditionally circumscribed, comprises seven species of trees, including some of the most ecologically hyper dominant taxa across the Amazonian terra firme and seasonally flooded forests. Here we employed a Bayesian analysis of densely sampled nuclear ribosomal ITS/5.8S and plastid matK and trnL intron DNA sequences to evaluate the monophyly of Clathrotropis. All individual and concatenated analyses concurred in showing the non-monophyletic nature of Clathrotropis, whose species fall into three distantly related lineages: one, comprised of C. brachypetala, C. brunnea, C. glaucophylla and the ecologically dominant C. macrocarpa, is circumscribed here as the new genus Cabari; the two others, comprising C. paradoxa and the widespread C. nitida, are more closely related to Spirotropis of the tribe Ormosieae. Such phylogeny-based dismemberment of Clathrotropis is further supported by vegetative, floral, fruit, and seed characters. Although the genes analysed in this study have provided phylogenetically informative data supporting the need for a new circumscription of Clathrotropis, we suggest that future phylogenomic studies should seek to better resolve the relationships of the newly described genus Cabari across the phylogenetically recalcitrant early-branching nodes of the Genistoid clade.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135874839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular phylogenetics and biogeography reveal the origin of cherries (Prunus subg. Cerasus, Rosaceae) 樱桃(Prunus subg.)的分子系统发育和生物地理学研究。子房,蔷薇科)

2区生物学

Botanical Journal of the Linnean Society Pub Date : 2023-10-31 DOI: 10.1093/botlinnean/boad060

Yan-Feng Song, Cheng Zhang, Muhammad Idrees, Xian-Gui Yi, Xian-Rong Wang, Meng Li

{"title":"Molecular phylogenetics and biogeography reveal the origin of cherries (Prunus subg. Cerasus, Rosaceae)","authors":"Yan-Feng Song, Cheng Zhang, Muhammad Idrees, Xian-Gui Yi, Xian-Rong Wang, Meng Li","doi":"10.1093/botlinnean/boad060","DOIUrl":"https://doi.org/10.1093/botlinnean/boad060","url":null,"abstract":"Abstract Cherries (subg. Cerasus) belong to Prunus s.l. (Rosaceae) and are widely distributed in temperate and subtropical regions of the Northern Hemisphere. Given its ornamental and edible functions, it is a hugely preferred germplasm resource for human societies. However, the interspecific phylogenetic relationships, divergence times, and routes of this subgenus remain unclear. To reveal its enigmatic and intricate evolutionary history, we newly sequenced 12 subg. Cerasus species, reconstructed the plastome phylogeny with 24 previously published subg. Cerasus species. This study supports that subg. Cerasus split into five clades, among which P. mahaleb is the basal group of subg. Cerasus; P. campanulata is genetically distantly related to P. cerasoides and is not recommended for treatment as a variety of the latter; P. subhirtella is involved in the speciation of P. yedoensis. Molecular dating and ancestral area reconstructions infer that subg. Cerasus originated in the Eastern Mediterranean–Central Asia before 11.57 Mya (95% HPD = 5.34–19.1 Mya) and subsequently spread into the Qinghai-Tibetan Plateau (QTP) and adjacent regions. The first dispersal event of modern subg. Cerasus was facilitated by ‘out-of-QTP’, colonizing North America across the Bering Land Bridge and re-dispersing into Europe from the Late Miocene to Pliocene and forming the initial distribution pattern of extant subg. Cerasus in the Pliocene; The end of the Quaternary glacial period witnessed a second dispersal event, and core subg. Cerasus population diversity flourished radially in its separate refugia during the Late Pleistocene.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135808949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Contribution of ovule anatomy to the taxonomic context of Parodia Spegazzini (Cactaceae) 仙人掌属(仙人掌科)胚珠解剖对其分类背景的贡献

2区生物学

Botanical Journal of the Linnean Society Pub Date : 2023-10-31 DOI: 10.1093/botlinnean/boad058

Patrícia Gentz, Rhaniel Nicholas Lisowski Gonçalves, Jorge Ernesto de Araújo Mariath

{"title":"Contribution of ovule anatomy to the taxonomic context of Parodia Spegazzini (Cactaceae)","authors":"Patrícia Gentz, Rhaniel Nicholas Lisowski Gonçalves, Jorge Ernesto de Araújo Mariath","doi":"10.1093/botlinnean/boad058","DOIUrl":"https://doi.org/10.1093/botlinnean/boad058","url":null,"abstract":"Abstract The taxonomic history of Parodia Speg. is marked by many incongruences regarding its circumscription. The main question remains regarding the union of five genera into Notocactus s.l. and, later, the union of Notocactus s.l. with Parodia s.s., leading to Parodia s.l. Given that the ovules are conserved structures and that their anatomical structure remains unexplored within the genus, we sought to identify whether the anatomical traits of these structures show potential taxonomic applicability and whether they provide information that allows the genus to be circumscribed. Samples of flower buds of 15 species and two taxa in synonymy were processed and stained using plant anatomy methods for light microscopy. The ovules of Parodia are campylotropous, bitegmic, and crassinucellate, with the micropyle delimited by the inner integument; in Parodia s.s. we observed the nucellus and embryo sac projection and changes to the micropyle type, characteristics that reflect the circumscriptions that distinguish this genus from others in the synonymy of Parodia s.l. The results may also be useful with regard to infrageneric issues, allowing the distinction of some morphologically similar taxa, adding to the discussion of their infrageneric positions. Thus, we highlight the importance of ovule anatomical traits within the taxonomic context of Parodia.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135808952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evolutionary clustering in Neotropical biocultural heritage: the Huastec Mayan useful plants 新热带生物文化遗产的进化聚类:华氏玛雅有用植物

2区生物学

Botanical Journal of the Linnean Society Pub Date : 2023-10-31 DOI: 10.1093/botlinnean/boad061

José Arturo De-Nova, Daniela Sofía Villegas-Ortega, Madeleyne Cupido, Virginia Gabriela Cilia-López

{"title":"Evolutionary clustering in Neotropical biocultural heritage: the Huastec Mayan useful plants","authors":"José Arturo De-Nova, Daniela Sofía Villegas-Ortega, Madeleyne Cupido, Virginia Gabriela Cilia-López","doi":"10.1093/botlinnean/boad061","DOIUrl":"https://doi.org/10.1093/botlinnean/boad061","url":null,"abstract":"Abstract Biodiversity in the Neotropics includes an extraordinary diversity of plant variation produced by evolution that is useful for human well-being. Traditional knowledge of the Tenek, a Huastec Mayan culture, represents an important biocultural heritage for this realm. Here, we used the information about their useful plants to explore evolutionary biocultural patterns occurring in Neotropics. Our goal was to analyse the phylogenetic distribution of usage guilds, their degree of evolutionary clustering, significant associations, and phylogenetic overlap between guilds to test the hypothesis that Tenek selection of plants is not random but phylogenetically clustered. We found significant phylogenetic clustering in all usage guilds except ceremonial and medicine. Tenek people use a variety of relatively deep plant lineages providing specific services that biocultural processes have promoted in the ecosystems they inhabit. The lineages Asterales, Caryophyllales, Fabales, Lamiales, Malpighiales, and Malvales in eudicots and Poales and Asparagales in monocots concentrated most of the Huastec Mayan useful plants. Multi-functional hot nodes, including Asterales, Fabales, Lamiales, Malvales, Poaceae Sapindales, and Solanales, with phylogenetic overlap between usage guilds, should be major priority targets in conservation planning.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135808950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Homeologue differential expression in the flavonoid biosynthetic pathway underlies flower colour variation in natural and synthetic polyploids of Nicotiana tabacum (Solanaceae) 黄酮类化合物生物合成途径的同源性差异表达是烟草天然多倍体和人工多倍体花色变化的基础

2区生物学

Botanical Journal of the Linnean Society Pub Date : 2023-10-24 DOI: 10.1093/botlinnean/boad052

Elizabeth W McCarthy, Jacob B Landis, Abigail G McCoy, Amber J Lawhorn, Amelda Kurti, Yimin Xu, James J Giovannoni, Amy Litt

{"title":"Homeologue differential expression in the flavonoid biosynthetic pathway underlies flower colour variation in natural and synthetic polyploids of Nicotiana tabacum (Solanaceae)","authors":"Elizabeth W McCarthy, Jacob B Landis, Abigail G McCoy, Amber J Lawhorn, Amelda Kurti, Yimin Xu, James J Giovannoni, Amy Litt","doi":"10.1093/botlinnean/boad052","DOIUrl":"https://doi.org/10.1093/botlinnean/boad052","url":null,"abstract":"Abstract Homeologue expression bias occurs when one progenitor copy of a gene is expressed at a higher level than the other in allopolyploids. Morphological variation, including differences in flower colour, exists between natural and synthetic allopolyploids of Nicotiana tabacum and their progenitors. In this study, we use a comparative transcriptomic approach to investigate gene expression differences as well as homeologue bias in the flavonoid biosynthetic pathway (FBP) in these accessions. We do not observe reciprocal homeologue bias between dark and light pink allopolyploids, but the production of light pink flowers is correlated with high FLAVONOL SYNTHASE:DIHYDROFLAVONOL-4-REDUCTASE (FLS:DFR) ratio at 60% of anthesis length due to delayed activation of DFR in these accessions. We do find that natural allopolyploids have stronger homeologue bias than synthetic allopolyploids in both FBP genes and across the transcriptome. While there is no overall subgenome dominance, there is a bias towards expression of N. tomentosiformis homeologues in FBP genes; however, the magnitude of this bias is reduced in allopolyploids compared to the progenitors, suggesting that N. sylvestris homeologues play an active role in the development of flower colour in N. tabacum allopolyploids. In addition, synthetic allopolyploids tend to exhibit trans regulation of homeologues whereas natural allopolyploids often have evolved cis-regulatory differences between homeologues since their origin.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135219377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evolution of the floral nectaries in the Primulaceae sensus lato (Ericales) 报春花属植物花蜜的进化

2区生物学

Botanical Journal of the Linnean Society Pub Date : 2023-10-16 DOI: 10.1093/botlinnean/boad049

Mauricio J Cano, Louis Ronse De Craene

{"title":"Evolution of the floral nectaries in the Primulaceae sensus lato (Ericales)","authors":"Mauricio J Cano, Louis Ronse De Craene","doi":"10.1093/botlinnean/boad049","DOIUrl":"https://doi.org/10.1093/botlinnean/boad049","url":null,"abstract":"Abstract The Primuloid clade or Primulaceae sensus lato is well supported and contains several pollination syndromes, including wind pollination and insect pollination with pollen, nectar, or oil as a reward. Previous studies have recognized two types of nectaries (floral and extrafloral) with different distributions (e.g. ovary, stigma, style, pedicel). This study aimed to reassess the diversity of nectary types, and their distribution and evolution within the clade. Flowers were selected to represent the four subfamilies Maesoideae, Theophrastoideae, Primuloideae, and Myrsinoideae. The flowers were investigated for nectary tissue with electron microscopy, light microscopy, and sugar tests. Nectar is mainly exuded by gynoecial nectarostomata (in Maeseoideae, Theophrastoideae, Primuloideae, and a few basal Myrsinoideae, such as Stimpsonia and Coris) distributed at the base, middle, and top part of the ovary. Myrsinoideae is the exception with an absence of a nectary linked to buzz-pollination, or presenting nectariferous or oil-producing trichomes on the perianth and stamens. The evolution of nectaries is variable in the Primuloid clade, with Primuloideae apparently the starting point of an evolutionary reversal in terms of nectary evolution within this clade, and a high diversity of nectaries within the Myrsinoideae representing various trends that are currently under-investigated. The evolution of floral nectaries in Primulaceae presents an exciting shift from nectar-producing flowers towards a loss of nectaries, and an evolutionary reversal with a shift to the co-option of either oil-producing trichomes or nectar-producing trichomes.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136079821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phylogeography and chromosome number variation in Micranthes nelsoniana and related species (Saxifragaceae) in Northeast Asia 东北亚蜜兰花及其近缘种的系统地理学和染色体数目变异

2区生物学

Botanical Journal of the Linnean Society Pub Date : 2023-10-16 DOI: 10.1093/botlinnean/boad053

Tomoko Fukuda, Naoko Ishikawa, Olga A Chernyagina, Vyacheslav Y Barkalov, Aleksandr A Taran, Valentin V Yakubov, Elena A Marchuk, Elena V Linnik, Ichiro Tamaki

{"title":"Phylogeography and chromosome number variation in Micranthes nelsoniana and related species (Saxifragaceae) in Northeast Asia","authors":"Tomoko Fukuda, Naoko Ishikawa, Olga A Chernyagina, Vyacheslav Y Barkalov, Aleksandr A Taran, Valentin V Yakubov, Elena A Marchuk, Elena V Linnik, Ichiro Tamaki","doi":"10.1093/botlinnean/boad053","DOIUrl":"https://doi.org/10.1093/botlinnean/boad053","url":null,"abstract":"Abstract Micranthes nelsoniana possesses multiple different variants and numerous chromosomes. Based on the internal transcribed spacer (ITS) and chloroplast (cp)DNA sequences, the phylogeography of M. nelsoniana and its relatives in Northeast Asia was investigated, with extensive sampling around the Kuril Islands. The Arctic–Asian continent and a clade of marginal islands were the two main groupings that comprised the ITS phylogenetic tree. The island clade was separated into five well-supported clades: Kamchatka and Hokkaido highlands, Kuril–Aleutian Islands, southern Kuril Islands, Japanese archipelago, and Primorye region. Micranthes fusca was found in Japan and in the southern Kuril Islands. It is a separate species that created several types of hybrids between M. nelsoniana in the centre of the Kuril Islands based on a comparison of the ITS and cpDNA networks. Micranthes nelsoniana and M. ohwii appear to have hybridized in the northern Kuril Islands. Cytological investigation on the local species of M. nelsoniana showed that the chromosomal numbers are: 2n = 24, 26, 28, 30, 50, and 80. Among them, two usual numbers to this area, 2n = 24 and 50, appear to encourage interspecific gene exchange. The genomes of Hokkaido plants with high chromosome counts were cloned, revealing that they contained genes of both continental and marginal origins. This study revealed the crucial role of marginal islands along Northeast Asia in the genetic diversity of M. nelsoniana and related species.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136079040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular phylogenetics of Oxalis subg. Thamnoxys (Oxalidaceae) reveals artificial arrangements of traditional sections 草叶草亚群的分子系统发育。莎草科的莎草揭示了传统剖面的人工安排

2区生物学

Botanical Journal of the Linnean Society Pub Date : 2023-10-14 DOI: 10.1093/botlinnean/boad044

Fernando S Cabral, Duane F Lima, Magdalena Vaio, Pedro Fiaschi

{"title":"Molecular phylogenetics of Oxalis subg. Thamnoxys (Oxalidaceae) reveals artificial arrangements of traditional sections","authors":"Fernando S Cabral, Duane F Lima, Magdalena Vaio, Pedro Fiaschi","doi":"10.1093/botlinnean/boad044","DOIUrl":"https://doi.org/10.1093/botlinnean/boad044","url":null,"abstract":"Abstract Oxalis subg. Thamnoxys is a mostly South American group of Oxalis encompassing almost 80 species from tropical habitats that are currently separated into nine sections based on morphology and geographic distributions. In this study, we investigated whether Oxalis subg. Thamnoxys and its sections are monophyletic. DNA sequences of the nrITS, trnL-trnL-trnF, and petA-psbJ from 92 specimens of Oxalis (55 from O. subg. Thamnoxys, 37 from O. subg. Oxalis, and five outgroup taxa) were used to investigate phylogenetic relationships among its nine sections. Nuclear and plastid molecular markers were subjected to maximum likelihood and Bayesian inference analyses individually and in a combined data matrix. Our phylogenetic trees recovered O. subg. Thamnoxys as monophyletic only if O. praetexta, previously included in O. sect. Robustae, is transferred to O. subg. Oxalis. The remaining samples of the subgenus emerged in a clade with full bootstrap and posterior probability support. Within it, O. sect. Holophyllum was the only section that was recovered as monophyletic, whereas the remaining sections were not, either because of sampling a single species of each (O. sect. Foliosae, Hedysaroideae, and Phyllodoxys), to the unexpected placement of O. goyazensis (O. sect. Robustae) in O. sect. Psoraleoideae, or to the sister relationship between O. densifolia (O. sect. Foliosae) with O. pyrenea var. macrochaeta (O. sect. Thamnoxys), suggesting the need of revaluating some specific affinities and updating sectional circumscriptions. This phylogenetic study with an improved sampling of O. subg. Thamnoxys is the first step towards an updated classification of the subgenus and for interpreting both its morphological diversification and biogeographic history in South America.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135766612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seed morphology of the Eriostemon–Phebalium clade (Rutaceae–Zanthoxyloideae) and implications for systematics 花椒科花椒枝的种子形态及其分类学意义

2区生物学

Botanical Journal of the Linnean Society Pub Date : 2023-10-14 DOI: 10.1093/botlinnean/boad055

Bokyung Choi, Marco F Duretto, Suk-Pyo Hong

{"title":"Seed morphology of the Eriostemon–Phebalium clade (Rutaceae–Zanthoxyloideae) and implications for systematics","authors":"Bokyung Choi, Marco F Duretto, Suk-Pyo Hong","doi":"10.1093/botlinnean/boad055","DOIUrl":"https://doi.org/10.1093/botlinnean/boad055","url":null,"abstract":"Abstract The Eriostemon–Phebalium clade (Rutaceae) includes c. 200 species across 16 genera, and is distributed in Australia (including Tasmania), New Caledonia, New Hebrides, New Zealand, and New Guinea. Phylogenetic analyses based on DNA sequences have consistently shown that the Eriostemon–Phebalium group is robustly monophyletic. However, despite this, taxonomy within the group is still uncertain: relationships between the genera are not well understood, and the genus Philotheca is polyphyletic. Seed morphological characters can be useful in taxonomy in angiosperms, and in this study, 21 seed morphological characters for 29 taxa of all the 16 genera circumscribed in the Eriostemon–Phebalium clade were examined using stereo and scanning electron microscopy. Seed morphological traits such as testa type and hilum were informative for some of the robustly supported clades in molecular phylogenetic studies, and a combination of seed characters could be useful for species identification. This study highlights the potential of seed morphological traits for the systematics.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135767015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rise and fall of a continental mesic radiation in Australia: spine evolution, biogeography, and diversification of Cryptandra (Rhamnaceae: Pomaderreae) 澳大利亚大陆辐射的兴衰:棘进化、生物地理学和隐子科(鼠李科:柚科)的多样化

2区生物学

Botanical Journal of the Linnean Society Pub Date : 2023-10-14 DOI: 10.1093/botlinnean/boad051

Francis J Nge, Jürgen Kellermann, Ed Biffin, Kevin R Thiele, Michelle Waycott

{"title":"Rise and fall of a continental mesic radiation in Australia: spine evolution, biogeography, and diversification of Cryptandra (Rhamnaceae: Pomaderreae)","authors":"Francis J Nge, Jürgen Kellermann, Ed Biffin, Kevin R Thiele, Michelle Waycott","doi":"10.1093/botlinnean/boad051","DOIUrl":"https://doi.org/10.1093/botlinnean/boad051","url":null,"abstract":"Abstract The Australian continent has experienced progressive aridification since the Miocene, spurring recent radiations of arid-adapted lineages and the likely decline of mesic biotic groups. While examples of the former have been relatively well-documented, post-Miocene declines of non-arid sclerophyllous floras are less well understood. Here, we present a well-sampled time-calibrated nuclear phylogeny (140 accessions representing 60/65 species) of an Australian plant genus (Cryptandra Sm.: Rhamnaceae) and using ancestral range reconstructions and diversification analyses, elucidate its evolutionary history through space and time. We used high-throughput sequencing to recover 30 orthologous nuclear loci and BioGeoBEARS to infer ancestral areas. We show that the present-day distribution of Cryptandra can be explained by multiple vicariance events followed by in situ diversification with little exchange between regions. All diversification models show a speciation rate decline in Cryptandra after its radiation in the Miocene (c. 23 Mya). This coincides with aridification episodes across Australia and indicates that diversification of this genus has been negatively affected by the expansion of aridity. We also show that there were no significant differences in diversification rates between spinescent and non-spinescent Cryptandra lineages, suggesting that spinescent lineages may be the legacies of selection from extinct megaherbivores.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135767399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0