RESUMO
The essential oils of Piper cernuum and Piper regnellii leaves were analyzed by gas chromatography-mass spectrometry (GC-MS) and the results were compared to that obtained by means of a program designed to analyse (13)C-NMR data of complex mixtures. Bicyclogermacrene (21.88 %)/beta-caryophyllene (20.69 %) and myrcene (52.60 %)/linalool (15.89 %) were the major constituents in essential oil from leaves of P. cernuum and P. regnellii, respectively. Both essential oils presented growth inhibitory activities against Staphylococcus aureus and Candida albicans.
Assuntos
Anti-Infecciosos/farmacologia , Bactérias/efeitos dos fármacos , Fungos/efeitos dos fármacos , Óleos Voláteis/farmacologia , Piperaceae/química , Antibacterianos , Anti-Infecciosos/análise , Anti-Infecciosos/química , Anti-Infecciosos/uso terapêutico , Cromatografia Gasosa-Espectrometria de Massas , Espectroscopia de Ressonância Magnética , Testes de Sensibilidade Microbiana , Óleos Voláteis/análise , Óleos Voláteis/química , Óleos Voláteis/uso terapêutico , Folhas de Planta/químicaRESUMO
Flavonoids have been shown to be good taxonomic markers for Asteraceae. More than 800 compounds comprising 4700 flavonoid occurrences were included in a computational system specially made for chemotaxonomic purposes. Some implications of flavonols, flavones and other types as well as structural features of them are discussed for tribes and subtribes of Asteraceae.
