Estudo químico de Eugenia dysenterica DC. (Myrtaceae) em associação ao controle de formigas cortadeiras Atta laevigata e efeito alelopático
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Data
2017-09-22
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Universidade Federal de Goiás
Resumo
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.
Descrição
Palavras-chave
Eugenia dysenterica, Cerrado, Estudo fitoquímico, Eugenia dysenterica, Thick, Phytochemical study
Citação
FALEIRO, J. H. Estudo químico de Eugenia dysenterica DC. (Myrtaceae) em associação ao controle de formigas cortadeiras Atta laevigata e efeito alelopático. 2017. 119 f. Dissertação (Mestrado em Química) - Universidade Federal de Goiás, Catalão, 2017.