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Acta Botânica Brasílica
Scopus
ISSN 1677-941X · Sociedade Botânica do Brasil · 2.436 artikel di indeks
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Properties related to communities of arbuscular mycorrhizal fungi along an altitudinal gradient in a Brazilian cloud forest
ABSTRACT This was the first study conducted on the diversity and abundance of arbuscular mycorrhizal fungi (AMF) species and quantification of glomalin-related soil protein (GRSP) fractions, as well as on their relationship with environmental and soil chemical and physical properties along an…
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Taxonomic revision of Phyllanthus sect. Gladiatus Orlandini, Cordeiro & V.C.Souza (Phyllanthaceae): A small group exclusive from the Atlantic Rain Forest areas, Brazil
Abstract Phyllanthaceae, with a pantropical distribution, has recently undergone significant changes in the composition of its genera. Among these, Phyllanthus is notable for its vast number of species, currently the second-largest genus in the family, and its remarkable morphological diversity…
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Plant dispersal strategies in post-mining restoration areas in the Eastern Amazon
Abstract Mining activities in the Amazon result in significant environmental damage to mined areas. Natural regeneration through seed dispersal is a crucial process that aims to reintegrate those mined areas into the native vegetation nearby. In this study, our main objective was to compare seed…
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Morphological characterization of polyads from Marlimorimia, Pityrocarpa, and Parapiptadenia supports the recent circumscription of the Stryphnodendron clade (Caesalpinoideae: Mimoseae)
Abstract Recent phylogenetic hypotheses have been used as evidence to reorganize the former genus Pseudopiptadenia into a new circumscription of Pityrocarpa and the recently described Marlimorimia, while confirming the monophyly of Parapiptadenia. In this study, we provide an additional line of…
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Dynamics of palm tree invasion control in an urban remnant of the Atlantic Forest
Abstract Biological invasions are a major driver of biodiversity change, particularly in disturbed urban forests where propagule pressure favors opportunistic species. Here, we document the demographic expansion and biomass contribution of the invasive Australian palm Archontophoenix cunninghamiana…
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Leaf morphoanatomy supporting evolutionary relationships in a recent clade of Asteraceae
Abstract This study analyzes the leaf morphoanatomy of representatives of the Chapada Diamantina clade (Asteraceae, Eupatorieae) to identify anatomical characters that aid in the taxonomic delimitation of the group. Leaves from 16 species across six genera were examined, focusing on epidermis…
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Astrocaryum tucuma: The correct name of a socially and economically important Amazonian palm
Abstract Tucumã is a palm of notable economic and cultural relevance in the Amazon region. Although its nomenclatural status is formally settled under the International Code of Nomenclature for algae, fungi, and plants, its scientific name in the literature remains characterized by persistent…
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Structural variation of secondary xylem and acclimation responses of two Atlantic Forest tree species in heterogeneous environments
Abstract Biodiversity loss exacerbated by climate change compromises habitat conservation and restoration strategies. Analyzing the functional traits of secondary xylem is a valuable tool for understanding how species respond to environmental conditions. This study aimed to characterize the…
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Floristic differentiation along coastal-inland gradients of the Atlantic Forest: insights from an urban ecotone in southeastern Brazil
Abstract The Atlantic Forest of Brazil exhibits marked climatic and edaphic gradients that generate strong floristic turnover across space. Yet, coastal urban remnants remain underexplored as potential ecotones where climatic filtering and anthropogenic influences interact to shape plant…
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Role of environmental drivers in phototrophic organisms thriving in the caves of America: a systematic review with quantitative synthesis
Abstract Caves are an ideal niche for photosynthetic microorganisms with the morphological and physiological adaptations to thrive under extreme conditions. Microclimatic conditions, mainly light, temperature, and relative humidity, vary depending on the location and configuration of these…
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Ensuring Stability: Contributions to the Nomenclature of the Neotropical Genus Matayba Aubl. (Sapindaceae)
Abstract Matayba comprises approximately 50 species of shrubs and trees distributed from Mexico to northern Argentina. The genus is divided into four sections, although names grouped into the sections Matayba sect. Apiomatayba, M. sect. Macaca, and M. sect. Ratonia evidence nomenclatural and…
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Morphological and chloroplast haplotype variation of the tropical seagrass Cymodocea rotundata from offshore Vietnam: implications for conservation
Abstract Cymodocea rotundata, a tropical seagrass abundant in Southeast Asia, exhibits considerable morphological plasticity. However, consistent morphological differences among populations may reflect genetic divergence potentially influenced by local environmental conditions, particularly in…
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Ontogenetic Characterization of the Mangaba Pericarp (Hancornia speciosa Gomes) (Apocynaceae)
Abstract The anatomical characterization of mangaba fruit at different developmental stages remains largely unexplored. This study aims to describe the anatomical features of the mangaba pericarp across distinct phenological stages. Conventional anatomical techniques were employed for fruit…
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Evolutionary and biogeographic history of disjunct species of Polypodiaceae between tropical America and the Afrotropics
Abstract Across the tropical Atlantic, morphologically similar vascular plants suggest the action of vicariance and dispersal processes. Robbin C. Moran & Alan R. Smith’s research documented this pattern for ferns and lycophytes, particularly within Polypodiaceae. This study aims to determine the…
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Inconsistencies in the Geographic Distribution of Passiflora Species in Brazil
Abstract Contradictions were observed in a recent analysis of the ranges of two new Passiflora species described for Brazil, Passiflora itatiaiensis and P. pardifolia, raising questions concerning that author’s knowledge of the physical geography of Brazil and South America, as well as adherence to…
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Floral Water Status: How This Functional Trait Can Explain the Relationships between Floral Visitors Within a Phytophysiognomic Context in the Cerrado
Abstract The flora of the Cerrado is highly adaptable to climatic and edaphic variability, yet climate change and anthropogenic activities pose increasing challenges. Water is a vital resource for plant physiological and reproductive processes, and directly influences floral traits and pollinator…
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Microsatellite markers and transferability in Amburana cearensis (Allemão) A.C.Sm (Leguminosae), an endangered species of Seasonally Dry Tropical Forests
Abstract Microsatellite markers (SSR) are still largely used to assess the reproductive system and genetic diversity in plant populations. Although the timber tree Amburana cearensis (Fabaceae) is endangered, according to the IUCN classification, there are no effective management and conservation…
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Still uncharted waters: Are we truly advancing in molecular studies of green and brown macroalgae (Ulvophyceae and Phaeophyceae) in Brazil?
Abstract Despite the ecological importance of marine macroalgae, molecular studies on green and brown algae in Brazil remain limited in scope and continuity. This review presents a scientometric analysis of DNA sequences deposited in GenBank from 1998 to 2023, focusing on Brazilian specimens of…
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Aquatic plants and where to find them: terms, concepts, and classifications of plants adapted to aquatic environments and their margins
Abstract Understanding and conserving wetland vegetation requires a unified framework for classifying plants adapted to aquatic environments. Numerous taxonomic, limnological, and ecological studies have endeavored to establish such a framework. From Eugenius Warming's pioneering work to the latest…
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Exploring leaf morphology of Parablechnum cordatum complex (Blechnaceae): An outline analysis approach using Elliptic Fourier Analysis for taxonomic resolution
Abstract Parablechnum is a genus in the fern family Blechnaceae that exhibits wide morphological variation without a distinct taxonomic discontinuity. To address this problem, we applied the technique of Elliptic Fourier Analysis to evaluate leaf shape by calculating Fourier harmonics based on…
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