Flávio Sousa Souto, Anauara Lima e Silva, Edinalva Alves Vital dos Santos, Maria de Fátima Agra
{"title":"Taxonomic implications of the leaf anatomy of twelve species of Senna ser. Bacillares (Leguminosae) from northeastern Brazil","authors":"Flávio Sousa Souto, Anauara Lima e Silva, Edinalva Alves Vital dos Santos, Maria de Fátima Agra","doi":"10.1007/s40415-024-01024-9","DOIUrl":"https://doi.org/10.1007/s40415-024-01024-9","url":null,"abstract":"<p><i>Senna</i> ser. <i>Bacillares</i> is a Neotropical group with about 50 species, being the largest and taxonomically more complex series of <i>Senna</i>. The leaf anatomy of twelve species of <i>Senna</i> ser. <i>Bacillares</i> (Leguminosae) from northeastern Brazil was examined to investigate the importance of anatomical characters in delimiting species within the series. Forty-three specimens were analyzed using light microscopy, following the usual techniques in plant anatomy. Four different petiole profiles were observed: circular, semicircular, hexagonal, and pentagonal; most petioles showed adaxial projections, those being strongly prominent in <i>S. chrysocarpa</i> and <i>S. quinquangulata</i> var. <i>quinquangulata</i>. Six different leaf rachis profiles were observed: pentagonal, elliptic, obovate, circular, semicircular, and irregularly triangular. The vascular systems of the petioles and leaf rachis showed similar patterns, with 4–7 central beams and two accessories. The midrib was plane-convex with an arched vascular bundle. The dorsiventral mesophyll has uniseriate palisade parenchyma, and 4–7-seriate spongy parenchyma. Five different leaflet edges outlines were observed: rounded, recurved, acute, acuminate, and truncate; the truncate and acuminate types were exclusive to <i>S. angulata</i> var. <i>miscadena</i> and <i>S. gardneri</i>, respectively. The dendrogram generated by cluster analysis showed the formation of two groups differentiated by the presence/absence of trichomes on the petiole and leaf rachis, and by the outline of the petiole. An identification key, based on morphoanatomical characters, is presented. Anatomical characters like the contour and number of vascular bundles of the petiole and leaf rachis, and shape of leaflet edges, provided additional support to the taxonomy of species of <i>Senna</i> ser. <i>Bacillares</i>, reinforcing the importance of anatomical studies to the taxonomy and systematics of Leguminosae.</p>","PeriodicalId":9140,"journal":{"name":"Brazilian Journal of Botany","volume":"63 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141743670","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}
Filipe G. Oliveira, Felipe da S. Santos, Gwilym P. Lewis, Reyjane P. de Oliveira, Luciano P. de Queiroz
{"title":"Publisher Correction to: Reassessing the taxonomy of the Libidibia ferrea complex, the iconic Brazilian tree “pau-ferro” using morphometrics and ecological niche modeling","authors":"Filipe G. Oliveira, Felipe da S. Santos, Gwilym P. Lewis, Reyjane P. de Oliveira, Luciano P. de Queiroz","doi":"10.1007/s40415-024-01020-z","DOIUrl":"https://doi.org/10.1007/s40415-024-01020-z","url":null,"abstract":"","PeriodicalId":9140,"journal":{"name":"Brazilian Journal of Botany","volume":"26 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141719923","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}
João Paulo Raimundo Borges, Ilmara Aparecida Oliveira Ferreira, Danubia Natalina Silva, Cinthia Soares Novaes, Ana Carolina Pereira Machado, Gudryan Jackson Baronio, Leonardo Ré Jorge, André Rodrigo Rech
{"title":"Unveiling the reproduction of Proteopsis argentea (Asteraceae): how the complex pollination system might influence its conservation status","authors":"João Paulo Raimundo Borges, Ilmara Aparecida Oliveira Ferreira, Danubia Natalina Silva, Cinthia Soares Novaes, Ana Carolina Pereira Machado, Gudryan Jackson Baronio, Leonardo Ré Jorge, André Rodrigo Rech","doi":"10.1007/s40415-024-01025-8","DOIUrl":"https://doi.org/10.1007/s40415-024-01025-8","url":null,"abstract":"<p>The reproductive success of organisms depends on the positive and negative interactions it establishes throughout its lifetime. Pollinators and mutualists increase adaptive value, while herbivory and antagonism impair plant performance. Asteraceae flowers, simultaneously interacting with pollinators, herbivores and parasitoids with the same structure (the flower head), serve as a model for studying these interactions. In this work we describe the multi-layered interactions between <i>Proteopsis argentea,</i>, its pollinators, endophagous herbivores and parasitoids, aiming to understand how they influence the plant's reproductive success and whether these processes are associated with its conservation status as vulnerable. We found that <i>P. argentea</i> produces little, but highly energetic nectar, acting in interactions with bees, hummingbirds and lepidopterans in a generalist pollination system. Antagonistic interactions were much less diverse, dominated by <i>Xanthaciura</i> aff. <i>chrysura</i>. In addition, two morphospecies of parasitoid wasps used the flower heads of <i>P. argentea</i>, and may have a negative impact on antagonists. We also found that <i>P. argentea</i> presents a reproductive insurance strategy, via autogamy, producing seeds without pollinators. The flowers of <i>P. argentea</i> seem to act as efficient filters, promoting interactions with potential pollinators and parasitoids and limiting interaction with endophagous herbivores. The reproductive strategies of <i>P. argentea</i>, with an apparently efficient floral filter and reproductive insurance in the absence of pollinators, seems to indicate that reproduction is not a limiting factor for the species. Thus, for its conversation, measures ensuring the protection of its occurrence area should be prioritized.</p>","PeriodicalId":9140,"journal":{"name":"Brazilian Journal of Botany","volume":"35 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610135","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}
Mengxing Zhang, Sohel Rana, Chengzhe Li, Xiaoxue Zhang, Kaixin Tian, Zhen Liu, Zhi Li, Li Dai, Xiaodong Geng, Yanmei Wang
{"title":"Transcriptome analysis reveals the role of temperature in seed germination of Idesia polycarpa Maxim through the integration of phytohormones and sugar metabolism","authors":"Mengxing Zhang, Sohel Rana, Chengzhe Li, Xiaoxue Zhang, Kaixin Tian, Zhen Liu, Zhi Li, Li Dai, Xiaodong Geng, Yanmei Wang","doi":"10.1007/s40415-024-01027-6","DOIUrl":"https://doi.org/10.1007/s40415-024-01027-6","url":null,"abstract":"<p>The germination of <i>Idesia polycarpa</i> Maxim seeds plays a critical role in successfully cultivating this dioecious species. In order to reveal the mechanisms regulating the germination of <i>I. polycarpa</i> seeds under variable temperature environments, a comparative analysis of the phenotype information and genetic changes before and after germination of the seeds was conducted. Using the paraffin section method, morphological and structural changes were observed at three developmental stages—seed coat cracking (CK), emergence (SE), and radicle elongation (RE). The study also evaluated the relationship between morphological structure variation and the dynamics of endogenous hormones. In addition, three sets of transcriptome data were obtained using high-throughput sequencing technology and analyzed to screen for differential gene function during seed germination. The study found that most seeds effectively released from dormancy after treatment at 5 ℃ for 60 days and the highest germination rate at the variable temperature (15 ℃/25 ℃ for 12 h) environment. The gene ontology (GO) revealed that 26,578 differentially expressed genes (DEGs) were annotated into 52 subclasses under three major classifications: biological processes, molecular functions, and cellular components. KEGG functional classification revealed that 1,764 DEGs were present at different stages of seed germination. <i>I. polycarpa</i> seed germination is achieved by up-regulation of genes related to phenylpropane biosynthesis, phytohormone signaling, flavonoid biosynthesis, photosynthesis, starch and sucrose metabolism, and down-regulation of genes related to ribosomes. Analysis of differential genes at different stages of seed germination in <i>I. polycarpa</i> revealed that 34 differential genes were closely related to seed embryo growth and development, cell wall structure, and endosperm weakening. The RT-qPCR was used to verify the reliability and accuracy of six genes closely related to the seed germination of <i>I. polycarpa</i>. The results indicate that multiple phytohormones, starch, and sugar metabolism coordinately mediate seed germination in <i>I. polycarpa</i>. Further research is required to investigate the potential roles of certain genes in the seed germination of this species.</p>","PeriodicalId":9140,"journal":{"name":"Brazilian Journal of Botany","volume":"21 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610133","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}
{"title":"PCR compatible miniprep DNA isolation in rice using microwave and dry bath based heating devices","authors":"Dip Pal, Narottam Dey","doi":"10.1007/s40415-024-01023-w","DOIUrl":"https://doi.org/10.1007/s40415-024-01023-w","url":null,"abstract":"<p>An effective and fast miniprep DNA protocol is on demand among plant molecular biologist where two moderns heating devices (microwave and dry bath) may be adopted in place of conventional water bath which is time consuming and sometimes result in microbial contamination. Though most of the present-day modern laboratories are equipped with these two recent heating devices, very limited reports are available using these two devices for isolation of high-quality plant genomic DNA with desirable quantity. Addressing this demand, in present study an earlier adopted DNA isolation protocol was re-standardized on different rice tissue lines seedlings, leaves, stem and root with the inclusion of microwave and dry bath particularly for the duration and applied temperature during heating followed by comparing with popularly used protocol for yield and quality of the isolated genomic DNA through standard statistical analysis. Pair- wise t test unable to detect any significant differences (for both quality and quantity) between the earlier standardized protocol with the two newly standardized protocol (adopted with microwave and dry bath) for the isolated genomic DNA from the different plant tissues included. The isolated genomic DNA was amplified through PCR followed by resolving through agarose gel electrophoresis to confirm their PCR compatibility.</p>","PeriodicalId":9140,"journal":{"name":"Brazilian Journal of Botany","volume":"13 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141520959","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}
Nicolás I. Villalobos, Carlos M. Baeza, Víctor L. Finot, Óscar Toro-Núñez, Eduardo Ruiz-Ponce, Koji Takayama, Hiroshi Noda, Gonzalo A. Collado, Freddy Mora-Poblete
{"title":"“Alstroemeria maxima (Alstroemeriaceae, Alstroemerieae), a hidden giant” revealed through integrative taxonomy","authors":"Nicolás I. Villalobos, Carlos M. Baeza, Víctor L. Finot, Óscar Toro-Núñez, Eduardo Ruiz-Ponce, Koji Takayama, Hiroshi Noda, Gonzalo A. Collado, Freddy Mora-Poblete","doi":"10.1007/s40415-024-01017-8","DOIUrl":"https://doi.org/10.1007/s40415-024-01017-8","url":null,"abstract":"<p>This study delves into the cytogenetic, molecular, and ecological aspects of the <i>Alstroemeria pulchra</i> complex, emphasizing the role of prior morpho-colorimetric analyses in differentiating the infraspecific taxa of <i>A. pulchra</i>. The integration of advanced morpho-colorimetric analyses provided a quantitative basis for this differentiation, showcasing significant variations in flower morphology and coloration that precede and complement the cytogenetic, molecular, and ecological findings presented herein. Cytogenetic studies unveiled chromosomal disparities, and differentiated genetic clusters support the taxonomic separation of <i>A. pulchra</i> var. <i>maxima</i> from <i>A. pulchra</i> var. <i>pulchra</i> and <i>A. pulchra</i> subsp. <i>lavandulacea</i>. Additionally, updated morphometric descriptions, observations, and a differentiation key for the subspecies of <i>A. pulchra</i> are provided. This integrative approach not only deepens the understanding of biodiversity and adaptation in <i>Alstroemeria</i> but also underscores the synergy between various scientific disciplines to unravel taxonomic complexities. The obtained results pose new questions about the evolution and adaptation in related <i>Alstroemeria</i> species, the methodologies utilized can serve as a significant contribution to future research and conservation of this botanical genus with ornamental and ecological value.</p>","PeriodicalId":9140,"journal":{"name":"Brazilian Journal of Botany","volume":"19 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141152120","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}
{"title":"Short-term thermal exposure effects on growth rate, photosynthetic performance, and chemical composition in Pyropia spiralis (Rhodophyta) from the brazilian coast: insights and limitations","authors":"Vanessa Urrea-Victoria, Fungyi Chow","doi":"10.1007/s40415-024-01010-1","DOIUrl":"https://doi.org/10.1007/s40415-024-01010-1","url":null,"abstract":"<p>Red macroalga <i>Pyropia spiralis</i> thrives in the upper intertidal zone and demonstrates remarkable resilience to environmental fluctuations, attributed to protective mechanisms against factors like solar radiation, temperature, and desiccation. The aim of this is study was assess the thermosensitivity and tolerance of <i>P. spiralis</i>, subjecting to five temperatures (15, 20, 25, 30, and 35 °C) evaluating growth rate, photosynthetic performance, and chemical composition. The hypothesis states that higher temperatures will reduce growth and photosynthesis, overstimulate metabolism, degrade pigment composition, and trigger the synthesis of protective metabolites for stabilizing cellular structures under elevated temperature conditions. The study revealed thermotolerance between 15 and 25 °C, characterized by stable energy dissipation and minimal pigment changes. Yet, at 30 and 35 °C, there was significant thermosensitivity, leading to a notable drop in photosynthesis and pigments. Carbon-to-nitrogen (C:N) ratio, notably below 20 (9.58 at 15 °C and 7.86 at 25 °C), indicated a balanced growth characterized by optimal proportions of minerals, carbohydrates, and proteins. <i>P. spiralis</i> ' nutritional traits make it a promising candidate for use in seaweed-based products. Analysis of specific amino acids highlighted an upward trend at 25 °C, while higher temperatures induced a thermal-response profile associated with osmoprotectants, primary stress signals, and glutathione biosynthesis. Additionally, lower temperatures were linked to increased soluble carbohydrates, whereas higher temperatures inversely impacted protein accumulation. It is crucial to note that, being just one variable, the study provides a partial perspective, highlighting the importance of future, multifactorial analyses.</p>","PeriodicalId":9140,"journal":{"name":"Brazilian Journal of Botany","volume":"41 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887908","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}
Iveth Estrada-Sánchez, Adolfo Espejo-Serna, Javier García-Cruz, Ana Rosa López-Ferrari
{"title":"Richness, distribution, and endemism of neotropical subtribe Ponerinae (Orchidaceae, Epidendreae)","authors":"Iveth Estrada-Sánchez, Adolfo Espejo-Serna, Javier García-Cruz, Ana Rosa López-Ferrari","doi":"10.1007/s40415-024-01005-y","DOIUrl":"https://doi.org/10.1007/s40415-024-01005-y","url":null,"abstract":"<p>The subtribe Ponerinae (Orchidaceae) includes the genera <i>Helleriella</i> A. D. Hawkes, <i>Isochilus</i> R. Brown, <i>Nemaconia</i> Knowles & Westc., and <i>Ponera</i> Lindl. Most of its species are epiphytes and usually grow on trees of the genus <i>Quercus</i> L. in cloud forests and temperate coniferous and broad-leaved forests; some taxa are rarely lithophytes or less frequently terrestrial. The aim of this study was to estimate the distribution of the species of the subtribe Ponerinae using ecological niche models (ENM), determine areas with highest richness and endemism rates with the occurrence data and the models obtained, and determine if the areas with highest richness and endemism recognized in this work are located within any of the conservation areas (ANPs) and/or Regiones Terrestres Prioritarias (RTPs). We reviewed 1 044 herbarium specimens from ten institutional collections, corresponding to two species of <i>Helleriella</i>, eleven of <i>Isochilus</i>, six of <i>Nemaconia</i>, and two of <i>Ponera</i>, and a geographic and taxonomic database was generated. ENM were constructed with MaxEnt 3.3; and we determine areas with highest species richness and endemism with Biodiverse 4.3. Mexico is the richest country with 21 species, followed by Guatemala with nine. The more widely distributed species are: <i>Isochilus linearis</i> (Jacq.) R.Br, and <i>Nemaconia striata</i> (Lindl.) Van den Berg, Salazar & Soto Arenas; <i>I</i>. <i>oaxacanus</i> Salazar & Soto Arenas is endemic to Mexican state of Oaxaca and <i>N</i>. <i>dressleriana</i> (Soto Arenas) van den Berg, Salazar & Soto Arenas of Morelos. The cells with higher occurrence richness and occurrence weighted endemism were located in Chiapas Highlands, and the higher occurrence of corrected weighted endemism is located in Transmexican Volcanic Belt, considered the nucleus of the Mexican Transition Zone. On the other hand, the cells with greater ENM richness and ENM weighted endemism were located in Sierra Madre del Sur, and the higher ENM corrected weighted endemism in Sierra Madre Oriental. It is suggested to change the status of the regions Cañón del Zopilote and El Tlacuache from RTPs to ANPs.</p>","PeriodicalId":9140,"journal":{"name":"Brazilian Journal of Botany","volume":"15 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140570319","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}
Priya Yadav, Mohammad Wahid Ansari, Sakshi Saini, Shweta Punia, Babeeta C. Kaula, Varsha Rani, Sarvajeet Singh Gill, Narendra Tuteja
{"title":"Review and future prospects on the impact of abiotic stresses and tolerance strategies in medicinal and aromatic plants","authors":"Priya Yadav, Mohammad Wahid Ansari, Sakshi Saini, Shweta Punia, Babeeta C. Kaula, Varsha Rani, Sarvajeet Singh Gill, Narendra Tuteja","doi":"10.1007/s40415-024-01004-z","DOIUrl":"https://doi.org/10.1007/s40415-024-01004-z","url":null,"abstract":"<p>The importance of medicinal and aromatic plants (MAPs) for humans has been recognized since ancient times for treating diseases of themselves and animals based on their traditional knowledge. In the past few decades, the requirement for medicinal plants has increased and resulted in their increased cultivation. However, different biotic and abiotic stresses significantly affect the growth and production of medicinal plants. Abiotic stresses such as drought, salinity, heavy metals, and cold are the primary constraints on plant biomass production and, consequently, their considerable metabolite production. Under unfavorable conditions, medicinal plants exhibit and adapt various responses at the physiological and molecular level to overcome these stresses, and it is essential to understand these responsive mechanisms to overcome the issue. This article presents data on some indigenous medicinal plants and their responses to anticipated global climate change conditions. Furthermore, applications of plant growth-promoting rhizobacteria (PGPRs), arbuscular mycorrhizal fungi (AMF), <i>Serendipita</i> (<i>Piriformospora</i>) <i>indica</i>, phytohormones, and nanoparticles have been summarized to overcome the impact of abiotic stress on plants in sustainable manner.</p>","PeriodicalId":9140,"journal":{"name":"Brazilian Journal of Botany","volume":"117 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140570322","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}
Arnaldo Briceño, Maria Silvia de Mendonça, Damelis Jáuregui
{"title":"Anatomy and ontogeny of inflorescence and flower of Bactris simplicifrons Mart. (Arecaceae, Arecoideae, Bactridinae)","authors":"Arnaldo Briceño, Maria Silvia de Mendonça, Damelis Jáuregui","doi":"10.1007/s40415-024-01007-w","DOIUrl":"https://doi.org/10.1007/s40415-024-01007-w","url":null,"abstract":"<p><i>Bactris simplicifrons</i> Mart. is considered a complex of species, due to its extensive distribution and considerable variability. Therefore, we investigated the ontogeny and morphoanatomy of its inflorescences and flowers to provide valuable biological information and identify features of interest for the taxonomy and systematics of the species and genus. To achieve this, we collected inflorescences from individuals growing in Manaus, Brazil. Based on the observed morphological characteristics, we established different developmental stages. The sampled material underwent standard protocols for light and scanning electron microscopy. This study reports for the first time, the development of connate bracts in <i>Bactris</i> and Arecaceae. Noteworthy is the centripetal development of the androecium, as opposed to the centrifugal pattern observed in other <i>Bactris</i> species. We identified traits that may be included in a phylogenetic study, such as epipetaly and the papillose style canal. The synascidiate proximal portion and symplicate distal portion of the gynoecium, becoming assimplicate in the most distal zone, is a relevant characteristic compared to other Arecaceae. Additionally, we characterized the histological arrangement of the inflorescence and each floral organ, and described the observed trichomes. Features with potential diagnostic value compared to other species in the genus include the length of stigmatic lobes, trichome morphology, absence of rigid emergence, staminal filament morphology, among others.</p>","PeriodicalId":9140,"journal":{"name":"Brazilian Journal of Botany","volume":"53 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140593685","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}