Pub Date : 2023-12-07DOI: 10.1093/botlinnean/boad067
Ana Luisa Arantes Chaves, Ana Carolina Galindo da Costa, Isabel Cristina Machado, Rosemeri Morokawa, William Wayt Thomas, Suzana Maria Costa
Studies about reproductive aspects of angiosperms rarely refer to herbaceous and anemophilous groups. Cyperaceae are cosmopolitan and diverse in terms of sexuality, inflorescence architecture, and pollination modes, such as anemophily, entomophily, and ambophily. Therefore, the evolution of reproductive traits can clarify some questions about the reproductive biology of angiosperms, especially regarding the transitions between biotic and abiotic pollination. This study was designed to investigate the evolution of reproductive traits in Cyperaceae through comparative phylogenetic methods, such as reconstruction of ancestral states and evolutionary correlation. If spicoids in Mapanioideae are indeed inflorescences, the bisexual flower in Cyperaceae would be derived, a rare case in angiosperms. In Cyperoideae, a decrease in the number of flowers and an increase in stamen loss events were observed. This result contradicts the hypothesized increase in reproductive structures in anemophilous species, in which a greater amount of pollen is produced to compensate for the waste generated by wind. Only one correlation was found: between the number of inflorescence branches and the number of reproductive units per inflorescence. Finally, the analyses showed the great diversity of reproductive biology in Cyperaceae and made evident the need to expand the theoretical studies to refine the discovery of correlated traits.
{"title":"Inherit the wind: evolution of reproductive traits in Cyperaceae","authors":"Ana Luisa Arantes Chaves, Ana Carolina Galindo da Costa, Isabel Cristina Machado, Rosemeri Morokawa, William Wayt Thomas, Suzana Maria Costa","doi":"10.1093/botlinnean/boad067","DOIUrl":"https://doi.org/10.1093/botlinnean/boad067","url":null,"abstract":"Studies about reproductive aspects of angiosperms rarely refer to herbaceous and anemophilous groups. Cyperaceae are cosmopolitan and diverse in terms of sexuality, inflorescence architecture, and pollination modes, such as anemophily, entomophily, and ambophily. Therefore, the evolution of reproductive traits can clarify some questions about the reproductive biology of angiosperms, especially regarding the transitions between biotic and abiotic pollination. This study was designed to investigate the evolution of reproductive traits in Cyperaceae through comparative phylogenetic methods, such as reconstruction of ancestral states and evolutionary correlation. If spicoids in Mapanioideae are indeed inflorescences, the bisexual flower in Cyperaceae would be derived, a rare case in angiosperms. In Cyperoideae, a decrease in the number of flowers and an increase in stamen loss events were observed. This result contradicts the hypothesized increase in reproductive structures in anemophilous species, in which a greater amount of pollen is produced to compensate for the waste generated by wind. Only one correlation was found: between the number of inflorescence branches and the number of reproductive units per inflorescence. Finally, the analyses showed the great diversity of reproductive biology in Cyperaceae and made evident the need to expand the theoretical studies to refine the discovery of correlated traits.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":"4 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138553240","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}
Pub Date : 2023-12-07DOI: 10.1093/botlinnean/boad069
Harvey K Orel, Todd G B McLay, Lydia K Guja, Marco F Duretto, Michael J Bayly
Zieria buxijugum, Z. formosa, and Z. parrisiae are three closely related, Critically Endangered species of questionable taxonomic validity that occur within six kilometres of each other on the south coast of New South Wales, Australia. We investigated genetic relationships and diversity of these species, along with two related but taxonomically distinct congeners, Z. granulata and Z. tuberculata, and a possible undescribed taxon, Z. aff. tuberculata. Double-digest restriction-site associated sequencing (ddRADseq) was used to generate anonymous genomic loci that were used for phylogenetic, network, and genetic structure analyses, and for estimating genetic diversity of the threatened species. Our results support the current taxonomic status of Z. buxijugum, Z. formosa, and Z. parrisiae, and suggest that Z. aff. tuberculata warrants recognition as a distinct species. We detected no evidence of inbreeding in the three Critically Endangered species, and found their genetic diversity to be similar to that of the more widespread species Z. granulata and Z. tuberculata. Comparison of plant material held in ex situ collections at the Australian National Botanic Gardens with wild plants highlighted several genotypes of the Critically Endangered species that are not represented in the ex situ collection, and we provide suggestions for the future inclusion of those unrepresented genotypes.
Zieria buxijugum、Z. formosa 和 Z. parrisiae 是三个密切相关的极危物种，其分类学有效性值得怀疑。我们研究了这些物种的遗传关系和多样性，以及两个相关但在分类学上不同的同系物 Z. granulata 和 Z. tuberculata，以及一个可能未被描述的类群 Z. aff.利用双位限制性位点相关测序（ddRADseq）生成匿名基因组位点，用于系统发育、网络和遗传结构分析，以及估计濒危物种的遗传多样性。我们的研究结果支持 Z. buxijugum、Z. formosa 和 Z. parrisiae 目前的分类地位，并认为 Z. aff. tuberculata 应被认定为一个独特的物种。我们在这三个极度濒危物种中没有发现近亲繁殖的证据，并发现它们的遗传多样性与更广泛分布的物种 Z. granulata 和 Z. tuberculata 相似。将澳大利亚国家植物园原地采集的植物材料与野生植物进行比较，发现有几种极度濒危物种的基因型在原地采集的植物材料中没有体现，我们为将来纳入这些未体现的基因型提出了建议。
{"title":"Genomic data inform taxonomy and conservation of Critically Endangered shrubs: a case study of Zieria (Rutaceae) species from eastern Australia","authors":"Harvey K Orel, Todd G B McLay, Lydia K Guja, Marco F Duretto, Michael J Bayly","doi":"10.1093/botlinnean/boad069","DOIUrl":"https://doi.org/10.1093/botlinnean/boad069","url":null,"abstract":"Zieria buxijugum, Z. formosa, and Z. parrisiae are three closely related, Critically Endangered species of questionable taxonomic validity that occur within six kilometres of each other on the south coast of New South Wales, Australia. We investigated genetic relationships and diversity of these species, along with two related but taxonomically distinct congeners, Z. granulata and Z. tuberculata, and a possible undescribed taxon, Z. aff. tuberculata. Double-digest restriction-site associated sequencing (ddRADseq) was used to generate anonymous genomic loci that were used for phylogenetic, network, and genetic structure analyses, and for estimating genetic diversity of the threatened species. Our results support the current taxonomic status of Z. buxijugum, Z. formosa, and Z. parrisiae, and suggest that Z. aff. tuberculata warrants recognition as a distinct species. We detected no evidence of inbreeding in the three Critically Endangered species, and found their genetic diversity to be similar to that of the more widespread species Z. granulata and Z. tuberculata. Comparison of plant material held in ex situ collections at the Australian National Botanic Gardens with wild plants highlighted several genotypes of the Critically Endangered species that are not represented in the ex situ collection, and we provide suggestions for the future inclusion of those unrepresented genotypes.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":"16 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138553713","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}
Pub Date : 2023-11-29DOI: 10.1093/botlinnean/boad066
Micol Boschin, Peter Schönswetter, Božo Frajman
The Mediterranean Basin is a hotspot of animal and plant diversity. Contrary to the Balkan and Iberian Peninsulas that were subject of many phylogeographic studies in past decades, the Apennine Peninsula and, in particular, the diversification of its flora has been neglected in contemporary phylogenetic studies. The few available studies showed a complex pattern of north–south differentiation of genetic diversity in Italy, both among the Alps, the Apuan Alps, and the Apennines, as well as within the Apennines. Here, we explore phylogeographic patterns within recently described Euphorbia adriatica, distributed in the central and northern Apennine Peninsula, the southern margin of the Eastern Alps and the north-western Balkan Peninsula, and its relationship to the southern Italian E. japygica. Our integrative approach using nuclear ITS sequences, amplified fragment length polymorphisms, relative genome size estimation combined with chromosome counting, as well as multivariate morphometrics inferred a weak genetic differentiation that only partly corresponds to the morphological differentiation. Whereas all southern populations have hairy capsules characteristic for E. japygica, only those in south-eastern Italy (Puglia and Basilicata) are genetically divergent. There are, however, additional morphological characters that differentiate them from other populations. Our data are thus in favour of recognizing a single species, E. japygica, which includes E. adriatica that should be treated as a subspecies. We provide a revised taxonomic treatment for E. japygica, including the typification. Our study shows the necessity of further in-depth investigations of diversification of Italian biota.
{"title":"Genetic and morphological differentiation within Euphorbia japygica (Euphorbiaceae) suggests divergence of populations from the south-eastern Apennine Peninsula","authors":"Micol Boschin, Peter Schönswetter, Božo Frajman","doi":"10.1093/botlinnean/boad066","DOIUrl":"https://doi.org/10.1093/botlinnean/boad066","url":null,"abstract":"The Mediterranean Basin is a hotspot of animal and plant diversity. Contrary to the Balkan and Iberian Peninsulas that were subject of many phylogeographic studies in past decades, the Apennine Peninsula and, in particular, the diversification of its flora has been neglected in contemporary phylogenetic studies. The few available studies showed a complex pattern of north–south differentiation of genetic diversity in Italy, both among the Alps, the Apuan Alps, and the Apennines, as well as within the Apennines. Here, we explore phylogeographic patterns within recently described Euphorbia adriatica, distributed in the central and northern Apennine Peninsula, the southern margin of the Eastern Alps and the north-western Balkan Peninsula, and its relationship to the southern Italian E. japygica. Our integrative approach using nuclear ITS sequences, amplified fragment length polymorphisms, relative genome size estimation combined with chromosome counting, as well as multivariate morphometrics inferred a weak genetic differentiation that only partly corresponds to the morphological differentiation. Whereas all southern populations have hairy capsules characteristic for E. japygica, only those in south-eastern Italy (Puglia and Basilicata) are genetically divergent. There are, however, additional morphological characters that differentiate them from other populations. Our data are thus in favour of recognizing a single species, E. japygica, which includes E. adriatica that should be treated as a subspecies. We provide a revised taxonomic treatment for E. japygica, including the typification. Our study shows the necessity of further in-depth investigations of diversification of Italian biota.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":"122 3","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138505107","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}
Pub Date : 2023-11-14DOI: 10.1093/botlinnean/boad046
Florian C Boucher, G Anthony Verboom, Laure Gallien, Allan G Ellis
Abstract Measuring the strength of different reproductive barriers across species pairs is key to reveal the mechanisms that have led to evolutionary radiations. Here we study a genus of miniature plants, Argyroderma, which comprises 11 species restricted to a single plain of the Southern African desert. We measure different reproductive barriers to understand how species boundaries are maintained in this genus. Our results show that reproductive isolation is almost complete between all species pairs and relies on three pre-mating barriers: geographic isolation operating at spatial scales of c. 10 km, phenological isolation in flowering time, and habitat isolation operating at spatial scales of just a few metres, which is thought to be due to contrasting edaphic preferences between species. In comparison, post-mating isolation arising before seed formation is weak and does not restrict gene flow much between species. Interestingly, the high levels of both geographic and habitat isolation that we have measured between Argyroderma species might be due to their miniature size, which leads to restricted gene flow across space and to adaptation to spatially restricted micro-habitats.
{"title":"Multiple reproductive barriers maintain species boundaries in stone plants of the genus <i>Argyroderma</i>","authors":"Florian C Boucher, G Anthony Verboom, Laure Gallien, Allan G Ellis","doi":"10.1093/botlinnean/boad046","DOIUrl":"https://doi.org/10.1093/botlinnean/boad046","url":null,"abstract":"Abstract Measuring the strength of different reproductive barriers across species pairs is key to reveal the mechanisms that have led to evolutionary radiations. Here we study a genus of miniature plants, Argyroderma, which comprises 11 species restricted to a single plain of the Southern African desert. We measure different reproductive barriers to understand how species boundaries are maintained in this genus. Our results show that reproductive isolation is almost complete between all species pairs and relies on three pre-mating barriers: geographic isolation operating at spatial scales of c. 10 km, phenological isolation in flowering time, and habitat isolation operating at spatial scales of just a few metres, which is thought to be due to contrasting edaphic preferences between species. In comparison, post-mating isolation arising before seed formation is weak and does not restrict gene flow much between species. Interestingly, the high levels of both geographic and habitat isolation that we have measured between Argyroderma species might be due to their miniature size, which leads to restricted gene flow across space and to adaptation to spatially restricted micro-habitats.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":"31 20","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134991202","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}
Pub Date : 2023-11-08DOI: 10.1093/botlinnean/boad064
Ning Li, Zhen Wang, Qi Deng, Ting Wang, Ying-Juan Su
Abstract Habitat fragmentation can facilitate local adaptation of species to heterogeneous environments and affect population demographic history. To understand the factors influencing evolutionary dynamics, such as climatic fluctuations and complex geomorphological features, we used 18 chloroplast microsatellites, 15 nuclear microsatellites, three chloroplast fragments, and two nuclear regions to explore the genetic structure and phylogeographical history of Pseudotaxus chienii. Furthermore, its current and past distributions were constructed based on ecological niche modelling. Moderate to high levels of genetic diversity were found at the species level. Precipitation was a decisive factor influencing the genetic structure of P. chienii. In addition, local adaptation to heterogeneous environments also contributed to maintain the fragmented distribution. Finally, incomplete lineage sorting led to the cyto-nuclear discordance. Overall, we show that pre-Quaternary and Quaternary climatic fluctuations and restricted gene flow exerted significant effects on the formation and maintenance of the fragmented distribution of P. chienii. The study provides new insights into the evolutionary history of plants in subtropical China.
{"title":"Effects of climatic fluctuations on the fragmented distribution pattern of a Tertiary relict plant, <i>Pseudotaxus chienii</i> (Taxaceae), in subtropical China","authors":"Ning Li, Zhen Wang, Qi Deng, Ting Wang, Ying-Juan Su","doi":"10.1093/botlinnean/boad064","DOIUrl":"https://doi.org/10.1093/botlinnean/boad064","url":null,"abstract":"Abstract Habitat fragmentation can facilitate local adaptation of species to heterogeneous environments and affect population demographic history. To understand the factors influencing evolutionary dynamics, such as climatic fluctuations and complex geomorphological features, we used 18 chloroplast microsatellites, 15 nuclear microsatellites, three chloroplast fragments, and two nuclear regions to explore the genetic structure and phylogeographical history of Pseudotaxus chienii. Furthermore, its current and past distributions were constructed based on ecological niche modelling. Moderate to high levels of genetic diversity were found at the species level. Precipitation was a decisive factor influencing the genetic structure of P. chienii. In addition, local adaptation to heterogeneous environments also contributed to maintain the fragmented distribution. Finally, incomplete lineage sorting led to the cyto-nuclear discordance. Overall, we show that pre-Quaternary and Quaternary climatic fluctuations and restricted gene flow exerted significant effects on the formation and maintenance of the fragmented distribution of P. chienii. The study provides new insights into the evolutionary history of plants in subtropical China.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":"34 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135430312","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}
Pub Date : 2023-11-08DOI: 10.1093/botlinnean/boad036
Shu-Han Li, Zheng-Yu Zuo, Cheng-Wei Chen, Van The Pham, Hong Truong Luu, Shi-Yong Dong
Abstract In Indochina the species diversity of Cyatheaceae remains insufficiently known. Here we demonstrate the scaly tree fern Gymnosphaera salletii in Vietnam to be an assemblage of three distinct species based on molecular and morphological data, and report for the first time the occurrence of foliar nectaries in Gymnosphaera. The true G. salletii is morphologically unique based on the protuberant glands present on the petiole. Gymnosphaera phankelocii sp. nov. and Gymnosphaeravietnamensis sp. nov. are recognized as new species; G. phankelocii is characterized by its distant two-rowed sori and G. vietnamensis by the sub-tripinnate fronds. Our phylogenetic analyses indicated that G. phankelocii is a relatively isolated species, while G. vietnamensis is a member of the G. salletii clade along with G. austroyunnanensis, G. salletii, and G. saxicola. The two new species and members of the G. salletii clade are all local endemics, and provide good examples to understand the frequent local endemics and their evolution in scaly tree ferns. Eleven species of Gymnosphaera are now known from Indochina; we provide a diagnostic key to these species.
{"title":"Three out of one: revising the species delimitation of the tree fern <i>Gymnosphaera salletii</i> (Cyatheaceae), with particular reference to the foliar nectary","authors":"Shu-Han Li, Zheng-Yu Zuo, Cheng-Wei Chen, Van The Pham, Hong Truong Luu, Shi-Yong Dong","doi":"10.1093/botlinnean/boad036","DOIUrl":"https://doi.org/10.1093/botlinnean/boad036","url":null,"abstract":"Abstract In Indochina the species diversity of Cyatheaceae remains insufficiently known. Here we demonstrate the scaly tree fern Gymnosphaera salletii in Vietnam to be an assemblage of three distinct species based on molecular and morphological data, and report for the first time the occurrence of foliar nectaries in Gymnosphaera. The true G. salletii is morphologically unique based on the protuberant glands present on the petiole. Gymnosphaera phankelocii sp. nov. and Gymnosphaeravietnamensis sp. nov. are recognized as new species; G. phankelocii is characterized by its distant two-rowed sori and G. vietnamensis by the sub-tripinnate fronds. Our phylogenetic analyses indicated that G. phankelocii is a relatively isolated species, while G. vietnamensis is a member of the G. salletii clade along with G. austroyunnanensis, G. salletii, and G. saxicola. The two new species and members of the G. salletii clade are all local endemics, and provide good examples to understand the frequent local endemics and their evolution in scaly tree ferns. Eleven species of Gymnosphaera are now known from Indochina; we provide a diagnostic key to these species.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":"19 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135430462","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}
Pub Date : 2023-11-06DOI: 10.1093/botlinnean/boad057
Fernanda Hurbath, Bárbara S S Leal, Inês Cordeiro, Cleber J N Chaves, Clarisse Palma-Silva
Abstract The largest continuous patch of Seasonally Dry Tropical Forests (SDTF) is the Caatinga Biome in north-eastern Brazil, which has the greatest biodiversity and highest degree of endemism compared to any other SDTF patch of South America. Our aim was to conduct a phylogeographic study with Euphorbia phosphorea to understand the evolutionary history of this species endemic to the Caatinga Biome. We studied genetic diversity and structure, demographic dynamics, as well as intraspecific phylogenetic relationships, based on plastidial and nuclear DNA. In addition, we conducted species distribution modelling (SDM) to infer connectivity since the Last Interglacial. Our results recovered a stronger genetic structure for plastidial than for nuclear genome, which probably result from distinct species capability to seed and pollen dispersal, and low levels of genetic diversity within populations. Although SDM results suggest higher connectivity during Last Maximum Glacial, demographic analyses detected no signs of demographic expansion in this period. In agreement with previous studies with rock specialists, our data reveal remarkable among-population differentiation and low within-population genetic diversity, which make populations more prone to drift effects. Furthermore, our results shed light on the importance of early Pleistocene events in the diversification of lineages within the Caatinga Biome, although further comparative work is required.
{"title":"Phylogeographic analysis reveals early Pleistocene divergence and strong genetic structure in <i>Euphorbia phosphorea</i> (Euphorbiaceae), an endemic species to the semi-arid Caatinga Biome","authors":"Fernanda Hurbath, Bárbara S S Leal, Inês Cordeiro, Cleber J N Chaves, Clarisse Palma-Silva","doi":"10.1093/botlinnean/boad057","DOIUrl":"https://doi.org/10.1093/botlinnean/boad057","url":null,"abstract":"Abstract The largest continuous patch of Seasonally Dry Tropical Forests (SDTF) is the Caatinga Biome in north-eastern Brazil, which has the greatest biodiversity and highest degree of endemism compared to any other SDTF patch of South America. Our aim was to conduct a phylogeographic study with Euphorbia phosphorea to understand the evolutionary history of this species endemic to the Caatinga Biome. We studied genetic diversity and structure, demographic dynamics, as well as intraspecific phylogenetic relationships, based on plastidial and nuclear DNA. In addition, we conducted species distribution modelling (SDM) to infer connectivity since the Last Interglacial. Our results recovered a stronger genetic structure for plastidial than for nuclear genome, which probably result from distinct species capability to seed and pollen dispersal, and low levels of genetic diversity within populations. Although SDM results suggest higher connectivity during Last Maximum Glacial, demographic analyses detected no signs of demographic expansion in this period. In agreement with previous studies with rock specialists, our data reveal remarkable among-population differentiation and low within-population genetic diversity, which make populations more prone to drift effects. Furthermore, our results shed light on the importance of early Pleistocene events in the diversification of lineages within the Caatinga Biome, although further comparative work is required.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":"161 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135723655","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}
Abstract The species Peucedanum ledebourielloides, a medicinally important herb, has previously been placed in Peucedanum s.l. based on dorsally compressed mericarps with slightly prominent dorsal ribs and narrowly winged lateral ribs. However, this genus has now been re-delimited in a narrow sense, namely Peucedanum s.s., further recognized by ternate leaves and glabrous plants, so that the taxonomic position of P. ledebourielloides is unknown. To investigate the taxonomic position of this species, we sequenced and assembled the complete plastomes for two samples of P. ledebourielloides. Phylogenetic analyses based on 79 protein-coding genes showed that the samples of P. ledebourielloides formed a separate clade and were distant from Peucedanum morisonii, a representative member of Peucedanum s.s., implying that P. ledebourielloides cannot not be placed in Peucedanum s.s. Additionally, plastome comparisons and chromosome studies indicated the clear specificity of P. ledebourielloides. In particular, pinnate leaves and dorsally compressed mericarps densely covered with forked scabrous bristles, slightly prominent dorsal ribs, narrowly winged lateral ribs, and one vitta in each furrow and two vittae on the commissure clearly distinguished P. ledebourielloides from Peucedanum s.s. and other genera of Apiaceae. Hence, a new genus, Pseudopeucedanum gen. nov., was established to accommodate this species. Our results improve the taxonomy of the family Apiaceae and provide guidance for the taxonomic revision of other taxa that are difficult to place systematically.
{"title":"Plastid phylogenomics provide evidence to accept a new genus <i>Pseudopeucedanum</i> (Apiaceae) separated from <i>Peucedanum s.l.</i>","authors":"Chang-Kun Liu, Jiao-Jiao Deng, Bo-Ni Song, Huan-Huan Qin, Song-Dong Zhou, Xing-Jin He","doi":"10.1093/botlinnean/boad062","DOIUrl":"https://doi.org/10.1093/botlinnean/boad062","url":null,"abstract":"Abstract The species Peucedanum ledebourielloides, a medicinally important herb, has previously been placed in Peucedanum s.l. based on dorsally compressed mericarps with slightly prominent dorsal ribs and narrowly winged lateral ribs. However, this genus has now been re-delimited in a narrow sense, namely Peucedanum s.s., further recognized by ternate leaves and glabrous plants, so that the taxonomic position of P. ledebourielloides is unknown. To investigate the taxonomic position of this species, we sequenced and assembled the complete plastomes for two samples of P. ledebourielloides. Phylogenetic analyses based on 79 protein-coding genes showed that the samples of P. ledebourielloides formed a separate clade and were distant from Peucedanum morisonii, a representative member of Peucedanum s.s., implying that P. ledebourielloides cannot not be placed in Peucedanum s.s. Additionally, plastome comparisons and chromosome studies indicated the clear specificity of P. ledebourielloides. In particular, pinnate leaves and dorsally compressed mericarps densely covered with forked scabrous bristles, slightly prominent dorsal ribs, narrowly winged lateral ribs, and one vitta in each furrow and two vittae on the commissure clearly distinguished P. ledebourielloides from Peucedanum s.s. and other genera of Apiaceae. Hence, a new genus, Pseudopeucedanum gen. nov., was established to accommodate this species. Our results improve the taxonomy of the family Apiaceae and provide guidance for the taxonomic revision of other taxa that are difficult to place systematically.","PeriodicalId":9178,"journal":{"name":"Botanical Journal of the Linnean Society","volume":"59 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135774960","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}
Pub Date : 2023-11-03DOI: 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
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.
{"title":"A molecular phylogeny of the early-branching Genistoid lineages of papilionoid legumes reveals a new Amazonian genus segregated from <i>Clathrotropis</i>","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":"39 4","pages":"0"},"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}
Pub Date : 2023-10-31DOI: 10.1093/botlinnean/boad060
Yan-Feng Song, Cheng Zhang, Muhammad Idrees, Xian-Gui Yi, Xian-Rong Wang, Meng Li
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.
{"title":"Molecular phylogenetics and biogeography reveal the origin of cherries (<i>Prunus</i> subg. <i>Cerasus</i>, 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":"41 12","pages":"0"},"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}
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