Seasonal variation in the composition of volatile oils from Schinus terebinthifolius raddi

Abstract

Essential oils from leaves, ripe and unripe fruits of Schinus terebinthifolius growing in Brazil were investigated. Oil content from either ripe or unripe fruits was similar (4.65% and 3.98%, respectively). Sesquiterpenes (from 78.0% to 90.4%) dominated the oil content of both leaves and unripe fruit. The essential oils were tested in vitro for their allelopathic activity on germination and radicle growth of Lactuca sativa and Cucumis sativus at 1,000 and 10,000 µg mL-1concentrations. The three samples tested were more active in inhibiting the radicle growth for L. sativa (88.6-92.4%) than for C. sativus (50.5-84.5%) at 10,000 µg mL-1 concentration

Isolamento e avaliação do potencial citotóxico de derivados fenólicos de Schinus terebinthifolius Raddi (Anacardiaceae)

“…10 Os óleos essenciais de folhas, flores e frutos de S. terebinthifolius de diferentes regiões foram previamente analisados, os quais se mostraram compostos basicamente por derivados mono e sesquiterpênicos. 11 No que se refere à avaliação da atividade biológica, os óleos voláteis dos frutos foram analisados e apresentaram atividade alelopática, 12 citotóxica 13 e tripanocida, 14 enquanto que o óleo das folhas mostrou atividade citotóxica. 15 Como parte de nossos estudos visando o reconhecimento de compostos com ação citotóxica em espécies vegetais brasileiras, neste trabalho foi realizado o estudo fitoquímico do extrato etanólico das folhas de S. terebinthifolius, o qual apresentou potencial in vitro frente a células tumorais humanas de melanoma (A2058), adenocarcinoma de mama (MCF7), leucemia (HL-60) e carcinoma cervical (HeLa).…”

Chemical Composition and Inhibitory Effects of Essential Oils on Germination and Seedling Growth of Barnyard Grass, Echinochloa crusgalli L.

“…In addition, the oil of O. vulgare was reported to inhibit seed germination of Raphanus sativus L., Lactuca sativa L. and Lepidium sativum (Arminante et al, 2006). Similarly, Amri et al (2013) demonstrated that the oil of C. sempervirens reduced the seed germination of Sinapis arvensis L., Phalaris paradoxa L. and Raphanus raphanistrum L. Also, the inhibitory effect of essential oils from other plants on seed germination was previously reported (Barbosa et al, 2007;Paudel and Gupta, 2008;Kordali et al, 2009).…”

Chemical characterisation and allelopathic potential of essential oils from leaves and rhizomes of white ginger

“…Research by Barbosa et al (2007), Rosado et al (2009), Silva et al (2009), Souza Filho et al (2006), Souza Filho et al (2009, show that various natural substances have an allelopathic effect, including many compounds present in essential oils, such as monoterpenes and sesquiterpenes, which may act by inhibiting seed germination and/or affecting plant vigour. Due to these negative effects on native species, the weeds become a real problem in places where they proliferate PEDRALLI;MEYER, 2005).…”