|
Résumé :
|
The essential oils from Piper species are chemically diverse, with several biological activities as well as commercial and pharmacological values reported. This work aims to compare the volatile constituents from leaves and inflorescences obtained by two different extraction techniques and show the seasonal variation of nerolidol in the essential oil from leaves of Piper claussenianum. The P. claussenianum volatile components were obtained by headspace solid-phase microextraction (HS-SPME) and hydrodistillation, coupled to gas chromatography/mass spectrometry (GC/MS) analysis. Leaf and inflorescence volatile fractions were analyzed in fresh and dried conditions. In total, 40 compounds were identified, accounting for 88.8–97.7% of the constituents. The high percentage of nerolidol in the leaves and linalool in the inflorescences were remarkable in this species, accounting for up to 77.0% and up to 50.0%, respectively, collected monthly. Results of (E)-nerolidol seasonal variation study carried out in the growth period of January/December 2009, suggest the plant leaves which provide an essential oil with high content of (E)-nerolidol over 88.0% are primarily observed in the September/December collection period.
|
