TCC - Bacharelado em Ciências Biológicas (UAST)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/2932
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Resultados da Pesquisa
Item Favaliação da atividade alelopática do extrato aquoso de Senna siamea (Lam.) H.S. Irwin & Barneby sobre o desenvolvimento de plântulas de Lactuca sativa l.(2019) Medeiros, Luanna Torres de; Saraiva, Rogério de Aquino; http://lattes.cnpq.br/6812072552819682; http://lattes.cnpq.br/8680775638977616Allelopathy is understood as a process that occurs in plant communities, where species act through mechanisms capable of interfering with the growth and development of other plants, through the release of chemicals, also called allelochemicals, which are derived from processes that cause they occur naturally in their secondary metabolism and subsequently deposited on the substrate. These allelochemicals may perform harmful or advantageous actions when in contact with other plants present in the same environment, depending on the amount and circumstances in which they are in place. Senna siamea (Lam) H.S. Irwin & Barneby, popularly known as canafistula or cassia-siam is originally from Thailand, but widely found in the Brazilian semiarid region, which has abundant application in landscape use, shading and various ethnopharmacological research. Considering the large dispersal of S. siamea species throughout the Brazilian Northeast, we aimed to evaluate its allelopathic activity on the development of Lactuca sativa (lettuce) seedlings. For this, 25 L. sativa seeds were placed in Petri dishes, and at the same time different concentrations (0, 25, 50, 75 and 100) of the aqueous extract of Senna siamea leaves were added, followed by The seeded plates wererelocated to a germination chamber where they remained for seven days under daily monitoring. The analyzes were performed through measurements of seedling root and hypocotyls and phytotoxicity bioassays and phytochemical tests, from which the presence of secondary metabolites classes such as flavonoids and phenolic compounds were detected. From this, an inhibitory effect was observed in relation to lettuce seedlings, which was observed by observing the root and hypocotyl length, decrease of vigor, presence of necrosis and reduction of chlorophyll and carotenoid content. Based on the knowledge obtained, it is possible to evidence that this plant species has relevant potential as a source of chemical compounds with significant biotechnological properties in the production of natural herbicides for less aggressive use against the weeds, besides the search for more information for proper use of plant species that have allelopathic potential.Item Desempenho de espécies vegetais conduzidas em sistemas agroflorestais e irrigadas com água cinza na Região do Sertão do Pajeú(2019) Silva, Hugo Felipe da; Barros Júnior, Genival; http://lattes.cnpq.br/4379675294862211; http://lattes.cnpq.br/6296491328478393The increasing demand for water in the Brazilian semiarid region has led farmers to seek local solutions to increase the supply of this important input to crops that feed their families and herds. This has already driven small-scale wastewater use in many communities or sites in the region. In this perspective the present work aimed to analyze the performance of fruit and forage plants conducted in Agroforestry Systems, under drip irrigation condition with filtered gray water and rainfed regime under semiarid climate conditions in Sertão do Pajeú, in the municipalities of Flores and Triunfo, in Pernambuco, Brazil. The plant evaluation period was from September 2018 to January 2019, in which the morphometric characteristics of the orange (Citrus sp.), Mango (Mangifera indica L.), soursop (Annona muricata L.), and gliricidia (Gliricidia sepium (Jacq.) Kunthex Walp.), as well as forage palm clones Mexican Elephant Ear (OEM) (Opuntia stricta var. IPA-200016 (Haw.) Haw.) IPA Sertânia (IS) and Doce Young (DM) of the species (Nopalea cochenillifera (L.) Salm-Dyck) of the varieties IPA-200205 and IPA-100004, respectively. Stem diameter (DC) and plant height (AP) were evaluated, and for palm clones it was evaluated beyond plant height (AP), plant width (LP), the number of cladodes per plant (NCP). first, second and third order, as well as the determination of the leaf area (AC) calculation through mathematical models; In addition to these parameters, the survival rate and growth rate of these plant species were determined. The use of gray water positively influenced the performance of plants when compared to those conducted under rainfed regime, obtaining superior results, both in growth and in plant survival, in the cultivated molds of the Agroforestry Systems conducted. by farming families. This shows that filtered gray water can be reused, especially in periods of water scarcity, reducing the level of environmental contamination and improving the performance of Agroforestry Systems in the semiarid region, becoming another resource to improve the quality of life of rural households of this region.