Composição química, atividade antibacteriana e alelopática dos óleos essenciais de Eugenia uniflora L. e Myrciaria glazioviana (Kiaersk) G. M. Barroso & Sobral (Myrtaceae)

• Autor(a) principal: Lopes, Maria Miranda
• Data de Publicação: 2008
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/2068
• topic: Eugenia; Myrciaria; Alelopatia; Óleos essenciais; Eugenia uniflora; Myrciaria; Allelopathy; Essentail oils; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICA

Data are presented concerning the influence of four 2008 distinct periods on content (%), chemical composition, antibacterial and allelopathic activity of Eugenia uniflora and Myrciaria glazioviana essential oils. E. uniflora is a cultivated plant while M. glazioviana is a native plant, both found in Viçosa, Minas Gerais, Brazil. The major constituents identified in E. uniflora in January were curzerene (25.6%), germacrone (20.4%) and β- elemene (4.5%); in May, [1-(3-methylbuta-1,2-dienil)-2- cyclopropyl]phenylmethanol (31.8%) and the nonidentified compound (24.9%) with a retention time of 40.2 minutes; in July, curzerene (25%), [1-(3-methylbuta-1,2-dienil)-2- cyclopropyl]phenylmethanol (16.6%) and germacrone (13.0%); and in September [1-(3-methylbuta-1,2- dienil)-2- cyclopropyl]phenylmethanol (26.6%), germacrone (9.0%) and the nonidentified compound (17.6%) with a retention time of 40.2 minutes. In M. glazioviana, the major constituents in January were β-elemene (7.7%), caryophyllene oxide (13.2%), elemol (10.9%) and aromadendrene (10.7%); in May, γ-elemene (4.9%), germacrene B (32.6%); in July, germacrene B (27.4%) and the non-identified compound (11.9%) with a retention time of 36.7 minutes; and in September, (E)-caryophyllene (7.3%), caryophyllene oxide (10.7%) and viridiflorol (8.8%). The species presented the highest essential oil yield in January (rainy period). Antibacterial activity was evaluated by the disc diffusion technique. E. uniflora and M. glazioviana essential oils presented moderate activity against Escherichia coli and Bacillus cereus and were inactive against Staphylococcus aureus. During the phytotoxic evaluation, interference in the root development of sorghum (Sorghum bicolor) and cucumber (Cucumis sativus) was observed, with the E. uniflora essential oil stimulating cucumber root growth at a low concentration (100 ppm).