Pub Date : 2023-01-01DOI: 10.1590/1677-941x-abb-2023-0086
Clebiana de Sá Nunes, Rafael Trevisan, André dos Santos Bragança Gil
Eleocharis multinerviglumis, a new species of Eleocharis ser. Tenuissimae (Cyperaceae) known only from the Poços de Caldas plateau in southeastern Brazil, is described here. The new species was found growing in an Atlantic Forest remnant as a submerged or emergent herb in a flooded environment. Eleocharis multinerviglumis differs from other Eleocharis ser. Tenuissimae species mainly by having dimorphic spikelets, with the upper glumes of the spikelets on the culm apex with 7 to 10 prominent longitudinal nerves on both sides (rib-like). Taxonomic notes, an occurrence map and illustrations (including SEM images) are provided.
文章标题菖蒲属一新种。只知道从poos de Caldas高原在巴西东南部的苏柏科，在这里描述。这种新物种被发现生长在大西洋森林的遗迹中，在洪水环境中作为一种淹没或新兴的草本植物。多角蛇不同于其他种类的蛇。主要具有二形小穗，在秆先端的小穗的上颖片在两侧有7到10个突出的纵神经(肋状)。提供了分类学注释，发生图和插图(包括SEM图像)。
{"title":"Eleocharis multinerviglumis, a remarkable new aquatic sedge species from the Brazilian Atlantic Forest biome","authors":"Clebiana de Sá Nunes, Rafael Trevisan, André dos Santos Bragança Gil","doi":"10.1590/1677-941x-abb-2023-0086","DOIUrl":"https://doi.org/10.1590/1677-941x-abb-2023-0086","url":null,"abstract":"Eleocharis multinerviglumis, a new species of Eleocharis ser. Tenuissimae (Cyperaceae) known only from the Poços de Caldas plateau in southeastern Brazil, is described here. The new species was found growing in an Atlantic Forest remnant as a submerged or emergent herb in a flooded environment. Eleocharis multinerviglumis differs from other Eleocharis ser. Tenuissimae species mainly by having dimorphic spikelets, with the upper glumes of the spikelets on the culm apex with 7 to 10 prominent longitudinal nerves on both sides (rib-like). Taxonomic notes, an occurrence map and illustrations (including SEM images) are provided.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135212878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/1677-941x-abb-2023-0024
Jéssica Soares de Lima, Mateus Luis Barradas Paciencia, Denilson Fernandes Peralta
{"title":"Does the stage of decomposition of fallen logs influence the bryophyte community? Understanding the epixylic bryophytes in a Nebular Forest in Southeastern Brazil","authors":"Jéssica Soares de Lima, Mateus Luis Barradas Paciencia, Denilson Fernandes Peralta","doi":"10.1590/1677-941x-abb-2023-0024","DOIUrl":"https://doi.org/10.1590/1677-941x-abb-2023-0024","url":null,"abstract":"","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135699788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/1677-941x-abb-2022-0291
Mateus Tomás Anselmo Gonçalves, Denilson Fernandes Peralta, Nivea Dias dos Santos
The Itatiaia National Park protects important Atlantic Forest remnants as well as a large number of rare bryophyte species. We reassessed the conservation status of 45 species of endemic and/or threatened mosses occurring in high-altitude fields in the Park. The conservation analysis followed the International Union for Conservation of Nature guidelines. The GeoCAT software was used to calculate the Extent of Occurrence (EOO) and Area of Occupancy (AOO). The threat vectors were characterized based on field observations and data from the literature. After the reassessment, 31 species were considered threatened, with 16 being considered vulnerable (VU), seven critically endangered (CR), and eight endangered (EN). Two species were considered “near threatened” (NT) and three were considered “data deficient” (DD), and seven were considered “least concern” (LC). The main threats in that region are wildfires and excessive tourism - factors that lower habitat quality and reduce their EOO and AOO. Recommendations to minimize imminent losses of the local bryoflora include incentives for research and microhabitat protection. Our results are designed to aid in the elaboration of conservation strategies for mosses in the Serra da Mantiqueira mountains.
意大利国家公园保护着重要的大西洋森林遗迹以及大量稀有的苔藓植物物种。我们重新评估了公园内高海拔地区特有或受威胁的45种苔藓植物的保护状况。保护分析遵循了国际自然保护联盟的指导方针。采用GeoCAT软件计算发生范围(EOO)和占用面积(AOO)。根据现场观察和文献资料对威胁媒介进行了表征。重新评估后，31种物种被认为是受威胁的，16种被认为是脆弱的(VU)， 7种被认为是极度濒危的(CR)， 8种被认为是濒危的(EN)。2种被认为是“近危”(NT)， 3种被认为是“数据不足”(DD)， 7种被认为是“最不关注”(LC)。该地区的主要威胁是野火和过度旅游，这些因素降低了栖息地质量，减少了它们的EOO和AOO。为尽量减少当地苔藓菌群即将遭受的损失而提出的建议包括鼓励研究和保护微生境。我们的研究结果旨在帮助制定Serra da Mantiqueira山脉的苔藓保护策略。
{"title":"Regional risk assessment of high-altitude field mosses","authors":"Mateus Tomás Anselmo Gonçalves, Denilson Fernandes Peralta, Nivea Dias dos Santos","doi":"10.1590/1677-941x-abb-2022-0291","DOIUrl":"https://doi.org/10.1590/1677-941x-abb-2022-0291","url":null,"abstract":"The Itatiaia National Park protects important Atlantic Forest remnants as well as a large number of rare bryophyte species. We reassessed the conservation status of 45 species of endemic and/or threatened mosses occurring in high-altitude fields in the Park. The conservation analysis followed the International Union for Conservation of Nature guidelines. The GeoCAT software was used to calculate the Extent of Occurrence (EOO) and Area of Occupancy (AOO). The threat vectors were characterized based on field observations and data from the literature. After the reassessment, 31 species were considered threatened, with 16 being considered vulnerable (VU), seven critically endangered (CR), and eight endangered (EN). Two species were considered “near threatened” (NT) and three were considered “data deficient” (DD), and seven were considered “least concern” (LC). The main threats in that region are wildfires and excessive tourism - factors that lower habitat quality and reduce their EOO and AOO. Recommendations to minimize imminent losses of the local bryoflora include incentives for research and microhabitat protection. Our results are designed to aid in the elaboration of conservation strategies for mosses in the Serra da Mantiqueira mountains.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135213661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/1677-941x-abb-2021-0249
Patrícia da Silva Sousa, Maria Jaislanny Lacerda e Medeiros, Letícia Sousa dos Santos Ferreira, Clarissa Gomes Reis Lopes
Limited experiential contact to natural environment can affect the knowledge of the local flora and, consequently, the intentions to conserve it. Therefore, this study aims to analyze whether high school students from Teresina (PI-Brazil) can identify more species of native than exotic plants and the factors that can affect this ability. 333 students from state public schools were interviewed through semi-structured questionnaires and with printed images of 20 species of plants found in the region. The data were analyzed using univariate non-parametric statistics. The results show that living in the countryside positively influenced the identification of local flora, but there was no significant difference in the number of identified plants between students who attended botany classes and those who did not. Two native plants (cashew-96.7% and pitomba-91.9%) and three exotic plants (mango-90.7%, guava-94.9% and acerola-82.0%) stood out among the most identified plant species. It was also found that, for two species of native plants very important for the State of Piauí, the caneleiro (0.6%) and the carnauba (26.7%), the identification rates were scarce. Thus, it is necessary to use Environmental Education and the teaching of Botany to prioritize native plant species, valuing local ecology and ensuring their protection.
{"title":"Contact with natural areas influences Brazilian high school students’ ability to recognize native plant species","authors":"Patrícia da Silva Sousa, Maria Jaislanny Lacerda e Medeiros, Letícia Sousa dos Santos Ferreira, Clarissa Gomes Reis Lopes","doi":"10.1590/1677-941x-abb-2021-0249","DOIUrl":"https://doi.org/10.1590/1677-941x-abb-2021-0249","url":null,"abstract":"Limited experiential contact to natural environment can affect the knowledge of the local flora and, consequently, the intentions to conserve it. Therefore, this study aims to analyze whether high school students from Teresina (PI-Brazil) can identify more species of native than exotic plants and the factors that can affect this ability. 333 students from state public schools were interviewed through semi-structured questionnaires and with printed images of 20 species of plants found in the region. The data were analyzed using univariate non-parametric statistics. The results show that living in the countryside positively influenced the identification of local flora, but there was no significant difference in the number of identified plants between students who attended botany classes and those who did not. Two native plants (cashew-96.7% and pitomba-91.9%) and three exotic plants (mango-90.7%, guava-94.9% and acerola-82.0%) stood out among the most identified plant species. It was also found that, for two species of native plants very important for the State of Piauí, the caneleiro (0.6%) and the carnauba (26.7%), the identification rates were scarce. Thus, it is necessary to use Environmental Education and the teaching of Botany to prioritize native plant species, valuing local ecology and ensuring their protection.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136202815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/1677-941x-abb-2023-0061
Francisca Robervania Soares dos Santos, Thalline Rafhaella Leite Cordeiro, Catarina Letícia Ferreira de Lima, Maria Alice Barbosa dos Santos, Leslie Waren Silva de Freitas, Eleni Gentekaki, Luciana Melo Sartori Gurgel, Cristina Maria de Souza-Motta, Hyang Burm Lee, André Luiz Cabral Monteiro de Azevedo Santiago
During a survey of mucoralean fungi in soil from an upland forest area located in Pernambuco, Brazil, a strain of Backusella (URM 8637) was isolated. Based on morphological, physiological, and molecular data [internal transcribed spacer (ITS) and large subunit (LSU) ribosomal DNA regions], it was recognized that this Backusella differed from all other species in the genus. Morphologically, the new species is characterized as forming varied-shaped columellae, including elongated, basally constricted, unisporate (rare) and multisporate sporangiola, and ellipsoidal sporangiospores. The maximum temperature growth of URM 8637 on malt extract agar and potato dextrose agar was 36 °C. In the phylogram, it was closely related to B. constricta. Based on the evidence from the analyzed datasets, a new species of Backusella is proposed. An updated identification key for Backusella from the Americas is provided.
{"title":"Discovery of Backusella paraconstricta sp. nov. (Mucorales, Mucoromycota) in an upland forest in northeastern Brazil with an identification key for Backusella from the Americas","authors":"Francisca Robervania Soares dos Santos, Thalline Rafhaella Leite Cordeiro, Catarina Letícia Ferreira de Lima, Maria Alice Barbosa dos Santos, Leslie Waren Silva de Freitas, Eleni Gentekaki, Luciana Melo Sartori Gurgel, Cristina Maria de Souza-Motta, Hyang Burm Lee, André Luiz Cabral Monteiro de Azevedo Santiago","doi":"10.1590/1677-941x-abb-2023-0061","DOIUrl":"https://doi.org/10.1590/1677-941x-abb-2023-0061","url":null,"abstract":"During a survey of mucoralean fungi in soil from an upland forest area located in Pernambuco, Brazil, a strain of Backusella (URM 8637) was isolated. Based on morphological, physiological, and molecular data [internal transcribed spacer (ITS) and large subunit (LSU) ribosomal DNA regions], it was recognized that this Backusella differed from all other species in the genus. Morphologically, the new species is characterized as forming varied-shaped columellae, including elongated, basally constricted, unisporate (rare) and multisporate sporangiola, and ellipsoidal sporangiospores. The maximum temperature growth of URM 8637 on malt extract agar and potato dextrose agar was 36 °C. In the phylogram, it was closely related to B. constricta. Based on the evidence from the analyzed datasets, a new species of Backusella is proposed. An updated identification key for Backusella from the Americas is provided.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135311599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/1677-941x-abb-2023-0028
Hoang Tuan Nguyen, Ngọc Anh Nguyen, Leonid Averyanov, Danh Duc Nguyen, Chi Toan Le
A new species, Curcuma tuanii (Zingiberaceae), is described and illustrated from Hoa Binh Province northern Vietnam based on both the morphological and molecular data. The species is morphologically compared with its closest allies from subgenus Ecomata. Additionally, the anatomical structures of the species were provided.
{"title":"Curcuma tuanii (Zingiberaceae) a new species of subgenus Ecomata from northern Vietnam based on morphological and molecular evidence","authors":"Hoang Tuan Nguyen, Ngọc Anh Nguyen, Leonid Averyanov, Danh Duc Nguyen, Chi Toan Le","doi":"10.1590/1677-941x-abb-2023-0028","DOIUrl":"https://doi.org/10.1590/1677-941x-abb-2023-0028","url":null,"abstract":"A new species, Curcuma tuanii (Zingiberaceae), is described and illustrated from Hoa Binh Province northern Vietnam based on both the morphological and molecular data. The species is morphologically compared with its closest allies from subgenus Ecomata. Additionally, the anatomical structures of the species were provided.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135212896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/1677-941x-abb-2023-0039
Pedro Henrique Cardoso, Gabriel Barros da Silva, Pablo Hendrigo Alves de Melo, Luiz Menini Neto, Marcelo Trovó
Stachytarpheta is one of the largest genera of Verbenaceae, found mainly in the campos rupestres of Brazil. We describe a new species, Stachytarpheta lajedicola, and report for the first time the occurrence of the genus in limestone outcrops. The new species is endemic to the Caatinga domain, northern Minas Gerais state, growing in an open karst formation of the municipality of Matias Cardoso, locally known as Lajedão. Its main diagnostic characteristics are the branches with well-developed longitudinal edges, leaves with attenuate to caudate apex, and inflorescences with linear bracts, exceeding the calyx in length. We provide a detailed description, illustrations, photographs, a geographic occurrence map, and comparisons with the morphologically similar species. Stachytarpheta lajedicola may be considered Critically Endangered (CR), and the biological importance of Lajedão and the conservation of the new species are discussed.
{"title":"Stachytarpheta lajedicola (Verbenaceae), a new species from the Caatinga of Minas Gerais state, Brazil: the first report of the genus in limestone outcrops","authors":"Pedro Henrique Cardoso, Gabriel Barros da Silva, Pablo Hendrigo Alves de Melo, Luiz Menini Neto, Marcelo Trovó","doi":"10.1590/1677-941x-abb-2023-0039","DOIUrl":"https://doi.org/10.1590/1677-941x-abb-2023-0039","url":null,"abstract":"Stachytarpheta is one of the largest genera of Verbenaceae, found mainly in the campos rupestres of Brazil. We describe a new species, Stachytarpheta lajedicola, and report for the first time the occurrence of the genus in limestone outcrops. The new species is endemic to the Caatinga domain, northern Minas Gerais state, growing in an open karst formation of the municipality of Matias Cardoso, locally known as Lajedão. Its main diagnostic characteristics are the branches with well-developed longitudinal edges, leaves with attenuate to caudate apex, and inflorescences with linear bracts, exceeding the calyx in length. We provide a detailed description, illustrations, photographs, a geographic occurrence map, and comparisons with the morphologically similar species. Stachytarpheta lajedicola may be considered Critically Endangered (CR), and the biological importance of Lajedão and the conservation of the new species are discussed.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135495086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1590/1677-941x-abb-2023-0021
Danilo C. Santos, Ailton M. A. Oliveira, Renato L. M. Alvarenga, Tatiana B. Gibertoni
{"title":"How climate change will change the potential distribution of two wood-decaying fungi?","authors":"Danilo C. Santos, Ailton M. A. Oliveira, Renato L. M. Alvarenga, Tatiana B. Gibertoni","doi":"10.1590/1677-941x-abb-2023-0021","DOIUrl":"https://doi.org/10.1590/1677-941x-abb-2023-0021","url":null,"abstract":"","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135702202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-19DOI: 10.1590/1677-941x-abb-2022-0126
A. L. Christ, D. D. Saraiva, J. Nakajima, M. Ritter
The Chromolaena congesta complex (Asteraceae, Eupatorieae) presents a difficult challenge for biodiversity researchers due to the intertwined connections of its species and the difficulty of establishing morphological boundaries. In this study, we aimed to use morphometric analyses to evaluate the delimitation of the taxa belonging to the C. congesta complex, identify informative morphological traits and to understand the identity of several “atypical” specimens morphologically related to the complex. To achieve this, we used cluster and principal component analysis to evaluate 50 morphological traits from a total of 210 specimens throughout the geographic distribution of the species complex. We found support for the recognition of at least six species - Chromolaena ascendens , C. gentianoides , C. hirsuta , C. latisquamulosa , C. rhinanthacea and C. squarrulosa - according to a phenetic species concept and to corroborate the restoration of three species from synonymy. Furthermore, our results provide a morphological recircumscription of C. congesta and C. elliptica and indicate two taxonomic novelties, including a new combination and a new species. Despite the answers provided by morphology, many taxonomic issues remain to be solved, and further studies with other types of evidence should be carried to contribute towards a more stable
{"title":"Morphometric studies suggest taxonomic changes in a species complex in Chromolaena (Asteraceae, Eupatorieae, Praxelinae)","authors":"A. L. Christ, D. D. Saraiva, J. Nakajima, M. Ritter","doi":"10.1590/1677-941x-abb-2022-0126","DOIUrl":"https://doi.org/10.1590/1677-941x-abb-2022-0126","url":null,"abstract":"The Chromolaena congesta complex (Asteraceae, Eupatorieae) presents a difficult challenge for biodiversity researchers due to the intertwined connections of its species and the difficulty of establishing morphological boundaries. In this study, we aimed to use morphometric analyses to evaluate the delimitation of the taxa belonging to the C. congesta complex, identify informative morphological traits and to understand the identity of several “atypical” specimens morphologically related to the complex. To achieve this, we used cluster and principal component analysis to evaluate 50 morphological traits from a total of 210 specimens throughout the geographic distribution of the species complex. We found support for the recognition of at least six species - Chromolaena ascendens , C. gentianoides , C. hirsuta , C. latisquamulosa , C. rhinanthacea and C. squarrulosa - according to a phenetic species concept and to corroborate the restoration of three species from synonymy. Furthermore, our results provide a morphological recircumscription of C. congesta and C. elliptica and indicate two taxonomic novelties, including a new combination and a new species. Despite the answers provided by morphology, many taxonomic issues remain to be solved, and further studies with other types of evidence should be carried to contribute towards a more stable","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87208106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-28DOI: 10.1590/1677-941x-abb-2022-0208
Débora Cavalcante de Oliveira, Luis Carlos Casas Restrepo, Márcio Ferreira dos Santos, L. P. Queiroz, F. Santos
In this study, pollen grains of Harleyodendron unifoliolatum , Holocalyx balansae , and Uribea tamarindoides , three monospecific genera with Neotropical distribution belonging to the clade Exostyleae, one of the basal lineages of the family Leguminosae, subfamily Papilionoideae, were analyzed. The palynological material was acetolyzed and analyzed under light microscopy (LM) and scanning electron microscopy (SEM). Under LM, small and medium-sized pollen grains were observed, which showed a prolate-spheroidal to prolate shape, 3-colporate, microreticulate and reticulate exine, sexine and nexine of equal thickness in Harleyodendron and Holocalyx , while the sexine was thicker than nexine in Uribea . Analysis under SEM showed finely granulate, psilate, and granulate apertural membrane, while the exine ornamentation varied from perforate-microechinate in Harleyodendron , to perforate in Holocalyx , while in Uribea showed an irregular relief and granular projections on the perforate tectum. The pollen morphology of these species is similar to each other, varying in sexine/nexine ratio, apertural membrane, and exine ornamentation. Harleyodendron has a finely granulate apertural membrane, sexine and nexine of equal thickness, and a perforate-microreticulate exine ornamentation, Holocalyx shows a psilated apertural membrane, sexine and nexine of equal thickness, and exine ornamentation perforate, and Uribea has a granulate apertural membrane, sexine thicker than nexine, and exine ornamentation with granular projections.
{"title":"Pollen morphology of the early branching papilionoid legume genera Harleyodendron, Holocalyx and Uribea","authors":"Débora Cavalcante de Oliveira, Luis Carlos Casas Restrepo, Márcio Ferreira dos Santos, L. P. Queiroz, F. Santos","doi":"10.1590/1677-941x-abb-2022-0208","DOIUrl":"https://doi.org/10.1590/1677-941x-abb-2022-0208","url":null,"abstract":"In this study, pollen grains of Harleyodendron unifoliolatum , Holocalyx balansae , and Uribea tamarindoides , three monospecific genera with Neotropical distribution belonging to the clade Exostyleae, one of the basal lineages of the family Leguminosae, subfamily Papilionoideae, were analyzed. The palynological material was acetolyzed and analyzed under light microscopy (LM) and scanning electron microscopy (SEM). Under LM, small and medium-sized pollen grains were observed, which showed a prolate-spheroidal to prolate shape, 3-colporate, microreticulate and reticulate exine, sexine and nexine of equal thickness in Harleyodendron and Holocalyx , while the sexine was thicker than nexine in Uribea . Analysis under SEM showed finely granulate, psilate, and granulate apertural membrane, while the exine ornamentation varied from perforate-microechinate in Harleyodendron , to perforate in Holocalyx , while in Uribea showed an irregular relief and granular projections on the perforate tectum. The pollen morphology of these species is similar to each other, varying in sexine/nexine ratio, apertural membrane, and exine ornamentation. Harleyodendron has a finely granulate apertural membrane, sexine and nexine of equal thickness, and a perforate-microreticulate exine ornamentation, Holocalyx shows a psilated apertural membrane, sexine and nexine of equal thickness, and exine ornamentation perforate, and Uribea has a granulate apertural membrane, sexine thicker than nexine, and exine ornamentation with granular projections.","PeriodicalId":6902,"journal":{"name":"Acta Botanica Brasilica","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81604467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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