ABSTRACT
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.
Subject(s)
Anti-Infective Agents/pharmacology , Bacteria/drug effects , Fungi/drug effects , Oils, Volatile/pharmacology , Piperaceae/chemistry , Anti-Bacterial Agents , Anti-Infective Agents/analysis , Anti-Infective Agents/chemistry , Anti-Infective Agents/therapeutic use , Gas Chromatography-Mass Spectrometry , Magnetic Resonance Spectroscopy , Microbial Sensitivity Tests , Oils, Volatile/analysis , Oils, Volatile/chemistry , Oils, Volatile/therapeutic use , Plant Leaves/chemistryABSTRACT
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.
