Estudo da influência de fatores ambientais nas atividades biológicas de Xylopia sericea St. Hill
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2012-02-28
Autores
Martins, Flávia Moreira Macedo de
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Universidade Federal do Espírito Santo
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The secondary metabolites of plants may suffer qualitative and quantitative changes depending on the environmental stimuli present. Among the environmental stimuli, special notice is given to the following biotic interactions: plant/micro-organisms, plant/insect, plant/plant, age and stage of development and circadian rhythm, and abiotic factors: light, temperature, rainfall and nutritional status, seasonality, water availability, UV radiation, atmospheric composition and altitude. This paper study of the influence of plant development, seasonality, availability of nutrient and soil water in the antimicrobial, antifungal, cytotoxic and allopathic plant extracts obtained from Xylopia sericea St. Hill. A sample of the aerial parts of the plant was carried out in different seasons (dry and rain) and in different habitats, an area characterized as natural (Parque Estadual de Itaúnas) and another as degraded (Campus Ceunes/UFES), in the Municipality of São Mateus/ES. The nutritional quality of soil pH and organic matter content were assessed in the different areas sampled. Moreover, measurements of the height and circumference (measured at a chests‟ height) of the plants were made to estimate the stage of their development. The extracts of the aerial parts of X. sericea were obtained by maceration in ethanol. Ethanol extracts were chemically characterized and tested for cytotoxicity, antifungal, antibacterial and allelopathy. The results revealed the influence of environmental factors, relating to the different areas and different seasons, in the biological activities tested. The extracts of X. sericea showed antifungal, antibacterial and allelopathy activities. Furthermore, the screening of the extracts were detected to have present in them pharmacognostic alkaloids, flavonoids, saponins, triterpenes, steroids, tannins, coumarins and naphthoquinones. Chemical analysis using High Performance Liquid Chromatography was possible to identify the flavonoids quercetin, rutin and hesperidin
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MARTINS, Flávia Moreira Macedo de. Estudo da influência de fatores ambientais nas atividades biológicas de Xylopia sericea St. Hill. 2012. 89 f. Dissertação (Mestrado em Biodiversidade Tropical) - Universidade Federal do Espírito Santo, Centro Universitário Norte do Espírito Santo, São Mateus, 2012.