Chemical composition and allelopathic activity of the essential oil from Callistemon viminalis (Myrtaceae) blossoms on lettuce (Lactuca sativa L.) seedlings

• Autor(a) principal: Oliveira, Christiane Maria de
• Data de Publicação: 2014
• Outros Autores: Cardoso, Maria das Graças, Figueiredo, Ana Cristina da Silva, Carvalho, Maria Laene Moreira de, Miranda, Cíntia Alvarenga Santos Fraga de, Albuquerque, Luiz Roberto Marques, Nelson, David Lee, Gomes, Marcos de Souza, Silva, Lucilene Fernandes, Santiago, Juliana de Andrade, Teixeira, Maria Luisa, Brandão, Rafaela Magalhães
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/42032
• topic: Biological activity; Myrtaceae; Allelopathy

The extraction of essential oils was performed by using the technique of hydrodistillation modified Clevenger apparatus, identification and quantification of the constituents was achieved by Gas Chromatography coupled to Mass Spectrometry, and Gas Chromatography equipped with a flame ionization detector. Assessment of allelopathic activity was evaluated with the use of the method that assesses the direct contact of essential oils on germination and vigor of lettuce seeds. The major constituents that characterize the essential oil from the flowers of Callistemon viminalis were 1, 8-cineole, α-pinene and limonene at concentrations of 66.9%, 16.0% and 10.0%, respectively. The essential oil presented allelopathic activity at intensities that varied proportionately to the concentration of the essential oil, with a reduction in the percentage of germination and the germination speed index (GSI) of lettuce seeds and in the dry mass and length of shoots and roots of lettuce seedlings.