Navegando por Autor "Bezerra, Elisangela Lucia de Santana"

Agora exibindo 1 - 4 de 4

Anatomia vegetativa e reprodutiva de Apeiba tibourbou Aubl. (Malvaceae)
(2019-07-10) Silva, Daniele Oliveira da; Palhares Neto, Luiz; Bezerra, Elisangela Lucia de Santana; http://lattes.cnpq.br/4360870964749577; http://lattes.cnpq.br/5084972198293403; http://lattes.cnpq.br/2375068620109287
Apeiba tibourbou (Aubl.) is a native tree belonging to the Malvaceae family that is part of a project developed by IPHAN, called Boats do Brasil, as it has been widely exploited by fishermen to make rafts since colonial times. In the literature, there are ecological studies suggesting it as an alternative to reforestation because it is a pioneer species. However, works on the anatomical structure are scarce. Considering the importance of this study as a subsidy for future research, especially in the area of ecology, the present work aimed to perform the anatomical study of vegetative and reproductive structures, as well as to analyze leaf histochemical compounds. Root, stem, leaf and flower buds were collected, fixed and processed according to usual techniques in plant anatomy. The root is tetrarch, transversely reveals the well developed dermal, fundamental and vascular systems. The stem tissues are perfectly differentiated, appearing the four regions: epidermis, cortical region, vascular cylinder and medulla. Histochemistry shows the presence of alkaloids, phenolic compounds, epidermis lipids and starch grains widely distributed throughout the parenchyma. The young and mature leaves of the adult individual have similar structures, however, some differences are noticeable in the young leaf as underdeveloped sclerenchymatic tissue, absence of fibers, increased secretory channels and increased trichomes. The leaves of cultivated plants have incipient development, however, it is possible to recognize anatomical aspects in common with the adult individual. The cross-section of the flower bud reveals very differentiated sepals and petals, while the innermost whorls, androceu and gynoecium are meristematic. Therefore, it is concluded that the species A. tibourbou presents anatomical structures that are diagnostic for the Malvaceae family and are highly related to the ecophysiology of xeric environments, as it has several adaptive features against excessive water loss.
Influência de diferentes substratos no crescimento inicial de rosa do deserto (Adenium obesum forssk. Roem. & Schult)
(2021-12-17) Souza, José Víctor de Melo; Bezerra, Elisangela Lucia de Santana; http://lattes.cnpq.br/4360870964749577; http://lattes.cnpq.br/8900822307167760
Although it is a relatively new ornamental plant on the market, the desert rose (Adenium obesum forssk. Roem. & Schult) is the fifth most traded in Brazil. Thus, the objective of this work was to evaluate the influence of different organic substrates on the development of desert rose seedlings. For development analysis, they were cultivated in vegetable soil for 9 days until germination, after which they continued to be watered daily for another 45 days, after which 60 individuals were selected and divided into 4 treatments for the experiment, namely: S1 (control group) 100% vegetable soil, S2 50% vegetable soil + 50% compost, S3 50% vegetable soil + 50% goat manure and S4 50% vegetable soil and 50% earthworm humus. The samples were kept in a greenhouse at random for 80 days and watered with 200ml at 48-hour intervals. After dismantling the experiment, the sample's morphometric data were collected and submitted to analysis of variance (ANOVA), and the means were compared by Tukey test at 5% significance. In all results, the treatments with goat manure and earthworm humus stood out and had results well above those of the control group, with averages such as leaf area and total size about five times larger than in the other treatments. Based on the results obtained, it was found that the treatments that best contributed to the development of Adenium obesum seedlings were treatments S3 (50% vegetable soil + 50% goat manure) and S4 (50% vegetable soil + 50% earthworm humus), proving that for seedlings of desert rose Adenium obesum (forssk. Roem. & Schult) the substrate porosity has a great contribution in its development.
Investigação da relação entre florivoria e síndromes de polinização
(2022-10-03) Araújo, Marina da Silva Pereira; Bezerra, Elisangela Lucia de Santana; Costa, Karine de Matos; http://lattes.cnpq.br/9888372717864521; http://lattes.cnpq.br/4360870964749577
Plants and pollinators maintain a mutualistic relationship necessary for plant reproduction and for the pollinator to collect the floral resource it needs. This relationship led to the diversification of plants and pollinators through coevolution, where one evolved in response to the other. However, there are antagonistic interactions that can change the visual display of flowers, making them less attractive to pollinators. Thus, florivory consists of damage to floral whorls (reproductive or sterile) caused by animals, and can be considered one of the selective pressures on plant reproduction. The objective of this study is to analyze the occurrence of florivory, identifying the possible floral attributes associated with this plant-animal interaction. The species were randomly collected on the UFRPE Campus and data from species from the Caatinga and from species belonging to the Dois Irmãos State Park (PEDI) were also used, and the floral attributes were recorded: color, shape, size, presence or absence of odor, symmetry, offered resource and pollination unit, classifying them according to the syndrome. The identification of the collected species was made through consultation of databases and specialized literature. Information on flowering species found in the literature was added to the in loco observations in the analyses. In this study, 50 species were considered, covering 23 families, with emphasis on Fabaceae, Asteraceae and Rubiaceae. There was a higher percentage of species with white and yellow flowers (both with 30%), rotated and hypocrateriform morphology (32% and 20%), very large size (38%), presence of odor (60%), actinomorphic symmetry ( 80%), nectar as a resource (76%) and flowers arranged in inflorescences (82%). These attributes are related to the greater representation of the melitophilia syndrome (64%). The set of floral attributes related to melitophily are associated with the greatest attraction of florivores in this study. Floral attributes such as open and easily accessible morphology, nectar as a resource, presence of odor, larger size and arrangement of flowers in inflorescences may be making flowers attractive to florivores.
O que faz a polinização ser “o menor dos mundos”? Uma análise a partir de estudos de caso
(2018) Araújo, Karoline Couto; Bezerra, Elisangela Lucia de Santana; http://lattes.cnpq.br/4360870964749577; http://lattes.cnpq.br/7885361436753765
Plant-pollinator interaction networks express a typical structure, marked by strong connectivity, degree of dependence and its size. Modularity may also be characterized in this system, especially when it comes to specialized syndromes, involving partners with certain more specific specificities and abilities. Particularly noteworthy are poricidal flowers and vibrating bees, oil flowers and bees collecting floral oils, resin flowers and Euglossini, tubular flowers and their related pollinators, ranging from long-tailed bees or specific hummingbirds to bats and sphingids.In this way, we aim to present a brief analysis to try to portray the biological system that involves the pollinator network in a fragmented Atlantic Forest scenario. Data collection was done through a bibliographic survey based on case studies developed in the PEDI. The works were collected in the database Pergamum and Google Scholar, using theses, dissertations and scientific articles. The keywords used in the search were pollination, reproductive biology and floral biology (pollination, reproductive biology and floral biology).The following information was extracted from the works for the construction of the network: I – name of plant species, II- name of the pollinators identified in the interactions. Then, the binary matrix was applied to Program R for the creation of the network of interaction in graph form. The size of the net found in the PEDI was equal to 60 (49 species of pollinators, being bees, flies and hummingbird and 11 species of plants). The bipartite graph presented heterogeneous connectivity, most interactions were simple, where many species interacted with few partners. From the perspective of pollinators, only Phaethornis ruber made generalist interactions (4). Among the plants, the Byrsonima sericea species presented the most connections (17). The present work concluded that the interaction network presented characteristics that confirm the expected patterns for pollination networks, especially for specialized syndromes.