A5015167407- Plant and animal studies
- Plant Diversity and Evolution
- Chromosomal and Genetic Variations
- Plant tissue culture and regeneration
- Plant Taxonomy and Phylogenetics
- Growth and nutrition in plants
- Banana Cultivation and Research
- Genetic diversity and population structure
- Phytochemistry Medicinal Plant Applications
- Plant and Fungal Species Descriptions
- Soil Management and Crop Yield
- Plant Pathogens and Fungal Diseases
- Botanical Research and Applications
- Botany, Ecology, and Taxonomy Studies
- Fern and Epiphyte Biology
- Seed Germination and Physiology
- Geography and Environmental Studies
- Agricultural and Food Sciences
- Forest ecology and management
- Environmental and biological studies
- Chemical synthesis and alkaloids
- Plant Parasitism and Resistance
- Agroforestry and silvopastoral systems
- RNA modifications and cancer
- African Botany and Ecology Studies
Universidade Federal da Paraíba
2015-2024
Universidade Federal de Pernambuco
1999-2023
Universidade Estadual da Paraíba
2013-2021
Field studies of the inselberg flora north-eastern Brazil have resulted in discovery much greater morphological diversity genus Ameroglossum, than previously envisaged. These enigmatic plants are endemic to isolated rock outcrops, which long been surrounded by unsuitable habitat. The forms geographically and stable cultivation when grown under similar conditions. We here provide detailed descriptions two known species propose an additional seven new genus. A taxonomic revision genus,...
Because of their fragmented nature, inselberg species are interesting biological models for studying the genetic consequences disjoint populations. Inselbergs commonly compared with oceanic islands, as most them display a marked ecological isolation from surrounding area. The these rock outcrops is reflected in high number recorded endemic and strong floristic differences between individual inselbergs adjacent habitats. We examined connectivity orchids Epidendrum cinnabarinum E. secundum...
Alstroemeria urubiciensis is an herbaceous species currently known only from a montane forest in the state of Santa Catarina, southern Brazil. It morphologically similar to A. cunha, which it differs by its greenish-yellow flowers, tepals with vinaceous longitudinal lines, and papillate bases on outer tepals. The exhibited karyotype 2n = 16, karyotypic formula 2ML + 2MS 2SML 2SMS 8A, no DAPI bands CMA located primarily at terminal regions short arms acrocentric chromosomes.
A new species of bromeliad, Tillandsia areiensis, subgenus Anoplophytum (Tillandsioideae, Bromeliaceae), is here described. The proposed taxon endemic to the highland humid enclaves Paraíba, Northeastern Brazil. Morphological and karyological characteristics this were compared with those tenuifolia, a morphologically similar species. Differences in floral traits, particularly peduncle bracts, as well cytotaxonomic markers (variations distribution heterochromatic bands), support recognition
A contaminação biológica é uma das principais causas da perda de biodiversidade atualmente no planeta. Este trabalho teve como objetivo avaliar os impactos causados pela invasão Prosopis juliflora sobre a composição e estrutura do componente arbustivo-arbóreo caatinga, tanto estrato adulto quanto na regeneração natural. Foram plotadas 20 parcelas 400 m², sendo 10 em um remanescente caatinga bem conservada (Ambiente I) área invadida por P. II). apresentou-se muito mais pobre relação à...
The chromosome numbers of 21 genera and 44 species subfamily Epidendroideae belonging to tribes Sobralieae, Epidendreae, Malaxideae Vandeae, subtribe Dendrobiinae, were determined. Chromosome varied from 2n = 24 in Malaxis pubescens c. 240 Epidendrum cinnabarinum. A revision the known for was also performed, aimed at determining basic genera, subtribes tribes. first counts 31 six tribe Sobralieae Ponerinae are presented. number each genus evaluated. predominance x 20 Epidendreae Arethuseae,...
The Cactaceae family is composed by 124 genera and about 1438 species. Pilosocereus gounellei, popularly known in Brazil as xique-xique, used folk medicine to treat prostate inflammation, gastrointestinal urinary diseases. pioneering phytochemical study of P. gounellei was performed using column chromatography HPLC, resulting the isolation 10 substances: pinostrobin (1), β-sitosterol (2), a mixture sitosterol 3-O-β-d-glucopyranoside/stigmasterol 3-O-β-d-glucopyranoside (3a/3b),...
We investigated four orchids of the genus Maxillaria (M. discolor, M. acicularis, notylioglossa and desvauxiana) in regard to position heterochromatin blocks as revealed using chromomycin A3 (CMA) 4'-6-diamidino-2-phenylindole (DAPI) fluorochrome staining 5S 45S rDNA sites fluorescence situ hybridization (FISH). The species showed differences chromosome number a diversified pattern CMA+ DAPI+ bands, including heteromorphism for bands. also varied most them were co-localized with relationship...
O bioma Caatinga apresenta diversas espécies vegetais amplamente empregadas pelas populações rurais, especialmente na fitoterapia, abrangendo diversos usos no tratamento de determinadas enfermidades. As plantas espontâneas, apesar serem entendidas como daninhas ou invasoras, concomitantemente apresentam propriedades fitoquímicas que podem ser aproveitadas âmbito medicinal. Nesta concepção, o referente trabalho tem objetivo identificar nativas da Caatinga, assim medicina popular através...
Holocentric karyotypes are assumed to rapidly evolve through chromosome fusions and fissions due the diffuse nature of their centromeres. Here, we took advantage recent availability a chromosome-scale reference genome for Rhynchospora breviuscula, model species this holocentric genus, developed first set oligo-based barcode probes plant. These were applied 13 additional aiming investigate evolutionary dynamics driving karyotype evolution in Rhynchospora. The two sets composed 27,392 (green)...
The Cymbidioid phylad presents the widest chromosome number variation among orchids, with records varying from 2n = 10 in Psygmorchis pusilla to 168 two species of Oncidium. In present work, a total 44 were studied belonging 20 genera, as contribution clarifying karyological evolution group. All plants investigated collected Brazil, mainly northeast region. found was similar that previously registered literature. Chromosome numbers observed were: 54 (subtribe Eulophiinae), 44, 46, 92...
Abstract In this study, we analyse a species complex in Epidendrum, mega-diverse Neotropical orchid genus, that is formed by the 11 Brazilian of E. difforme group. Although group (c. 100 taxa) exhibits relatively high levels floral variation, are similar, making delimitation problematic. Here combine molecular (phylogenetics), morphological (geometric morphometrics), genome size and cytogenetic (chromosome counts CMA/DAPI staining) data to investigate circumscription these species. Our...
Epidendrum is one of the largest Neotropical genera Orchidaceae and comprises approximately 1500 species. Only 2.8% these species have been studied cytologically, demonstrating chromosome numbers ranging from n = 12 in E. fulgens to 120 cinnabarinum. The present work evaluated evolution karyotypes spp. based on data gathered literature analyses 16 Brazilian (nine previously unpublished). appearance karyotype with larger pair subgenus Amphiglottium appears occurred at beginning divergence...
Abstract Holocentric chromosomes are rare among angiosperms, but have been suggested to be shared by all or most of the species Cyperaceae and Juncaceae. However, no clear demonstration centromere type in Juncus, largest genus Juncaceae, has so far published. Thus, we conducted a detailed chromosomal investigation four Juncus spp. aiming identify their type. Mitotic were analysed using fluorochromes CMA DAPI, fluorescent situ hybridization (FISH) with rDNA probes immunodetection histones H3...
Summary This special issue highlights some of the wonderful species native Australian tobacco ( Nicotiana sect. Suaveolentes ). We here present twelve this genus, four which are new to science. Many have a high ornamental value, and we hope that particularly rarer will find way into horticulture prevent them from becoming threatened. would allow maintenance ex‐situ populations, mitigating effects changing climate introduction invasive species. Tobaccos dispersed outback around two million...
Orchidaceae is a widely distributed plant family with very diverse vegetative and floral morphology, such variability also reflected in their karyotypes. However, since only low proportion of has been analysed for chromosome data, greater diversity may await to be unveiled. Here we analyse both genome size (GS) karyotype two subtribes recently included the broadened Maxillariinea detect how much GS variation there these groups evaluate which rearrangements are involved species evolution. To...
O presente estudo foi desenvolvido na Reserva Ecológica Estadual Mata do Pau-Ferro, localizada Microrregião Brejo Paraibano, Município de Areia. Com o objetivo avaliar comparativamente a estrutura e composição florística floresta em trechos diferentes idades, foram selecionadas seis capoeiras, assim caracterizadas: duas capoeiras sete anos (C7); 15 (C15) 20 (C20). Em cada uma das plotados três transcectos medindo 4×35 m, nos quais efetuado inventário estrato arbustivo-arbóreo da regeneração...
Inga striata Benth., Popularly known as ingazeiro, is a native fruit of tropical forests and riparian the Amazon, Northeast Minas Gerais. It used in reclamation degraded areas rural urban forestry. The objective this study was to determine most appropriate indices for assessing maturity ideal harvest seeds I. Benth. Trees were swamp forest altitude on Campus II Federal University Paraíba (UFPB), Areia-PB. Assessments seed maturation performed six seasons harvests after anthesis (95, 110,...
Pilosocereus pachycladus F. Ritter, Cactaceae, popularly known as "facheiro", is used food and traditional medicine in Brazilian caatinga ecoregion. The plant to treat prostate inflammation urinary infection. present work reports the first secondary metabolites isolated from P. pachycladus. Therefore, compound 4-hydroxy-3,5-dimethoxy benzaldehyde (syringaldehyde) was evaluated modulator of Staphylococcus aureus pump efflux-mediated antibiotic resistance. isolation compounds performed using...
KM, https://orcid.org/0000-0002-7658-0844; JK, https://orcid.org/0000-0002-9983-7630; CAM, https://orcid.org/0000-0001-5984-3238; EMdA, https://orcid.org/0000-0001-8033-5334; LIFA, https://orcid.org/0000-0002-4182-911X; TVA, https://orcid.org/0000-0003-3661-0719; FB, https://orcid.org/0000-0002-5710-7170; KB, https://orcid.org/0000-0002-0767-9226; LC, https://orcid.org/0000-0002-2105-9859; FEC, https://orcid.org/0000-0002-6473-3129; JMPC, https://orcid.org/0000-0001-9833-0822; MC,...
Abstract Background and Aims The entangled relationship of chromosome number genome size with species distribution has been the subject study for almost a century, but remains an open question due to previous ecological phylogenetic knowledge constraints. To better address this subject, we used clade Maxillariinae, widely distributed karyotypically known orchid group, as model system infer such relationships in robust methodological framework. Methods Based on literature new data, gathered...