JOURNAL 356


Records of Natural Products
VOLUME & ISSUE
Year: 2016 Issue: 2 March-April
PAGES
p.176 - 188
STATISTICS
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AUTHORS
    Soraia I. Falcão, Cristina Freire, A. Cristina Figueiredo and Miguel Vilas Boas
PDF OF ARTICLE

GRAPHICAL ABSTRACT


ABSTRACT


The volatiles from thirty six propolis samples collected from six different geographical locations in Portugal (mainland, Azores archipelago and Madeira Island) were evaluated. Populus x canadensis Moenchen leaf-buds and Cistus ladanifer L. branches essential oils were comparatively analysed. The essential oils were isolated by hydrodistillation and analysed by Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS). Cluster analysis based on propolis samples volatiles chemical composition defined three main clusters, not related to sample site collection. Cluster I grouped 28 samples with high relative amounts of oxygen-containing sesquiterpenes (20-77%), while cluster II grouped 7 samples rich in oxygen-containing monoterpenes (9-65%) and the only sample from cluster III was monoterpene hydrocarbons rich (26%). Although Populus x canadensis and Cistus ladanifer were associated as resin sources of Portuguese propolis, other Populus species as well as plants like Juniperus genus may contribute to the resin in specific geographical locations.

KEYWORDS
  • Propolis
  • volatiles
  • Populus x canadensis
  • Cistus ladanifer
  • GC
  • GC-MS.

SUPPORTING INFORMATION


Supporting Information
Download File 22-RNP-EO_1401-005-SI.pdf (344.08 KB)