Mestrado em Química - PPGQ

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Navegando Mestrado em Química - PPGQ por Autor "Aquino, Francisco José Tôrres de"

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    Estudo químico de Eugenia dysenterica DC. (Myrtaceae) em associação ao controle de formigas cortadeiras Atta laevigata e efeito alelopático
    (Universidade Federal de Goiás, 2017-09-22) Faleiro, José Henrique; Sousa, Lorena Ramos Freitas de; http://lattes.cnpq.br/3468067160878475; Severino, Richele Priscila; http://lattes.cnpq.br/8692556857906176; Severino, Richele Priscila; http://lattes.cnpq.br/8692556857906176; Carbonero , Elaine Rosechrer; Aquino, Francisco José Tôrres de
    CHEMICAL STUDY OF Eugenia dysenterica DC. (MYRTACEAE) IN ASSOCIATION TO LEAF-CUTTING ANTS Atta laevigata CONTROL AND ALELOPATIC EFECT – The study described in this work contributed to the chemical and biological knowledge of species E. dysenterica, found especially in Cerrado and popularly known as “cagaita”. Species of Eugenia are also used in folk medicine for various diseases and biological activities have been reported for E. dysenterica such as, antiviral, fungicidal, cytotoxicity, among others activities. This work describes the isolation and structural identification of seven secondary metabolites presente in the ethanolic extract of flowers of E. dysenterica, as well as the biological evaluation of the ethanolic extracts of flowers, leaves, stems and seeds against leaf-cutting ants A. laevigata and evaluation of allelopathic effect. The study of flowers was carried out using chromatographic technics and the isolated compounds were identified by 1D and 2D NMR experiments. The chemical investigation of flowers extract, first time investigated, led to identified the compounds ethyl gallate, gallic acid, kaempferol, quercetin, myricetin, (-)- epicatechin and juglanin. The ethanolic extracts of E. dysenterica and the fractions obtained from the flower extract didn’t show significant results in the ingestion tests against the workers A. laevigata. The allelopathic assays performed with the crude ethanolic extracts of leaves, flowers, stems and seeds provided satisfactory results. The flowers and leaves extracts (2 mg/mL) showed the highest inhibition values, allowing the germination of less than 5% of seeds evaluated.