HS-SPME-GC/MS analysis of the volatile components of the resins of different Commiphora Jacq. Species collected in Socotra Island

In this paper, the volatile phytochemical pattern of the resins of five Commiphora Jacq. species collected in Socotra Island was reported. Different populations were studied, some of which for the first time, by using head space-solid phase microextraction (HS-SPME) sampling technique to collect the volatiles emitted from these species. All the captured volatile compounds in the accessions were identified and quantified by means of Gas- Chromatography/Mass Spectrometry (GC/MS). The obtained results highlighted the presence of terpene compounds, mainly monoterpenes and sesquiterpenes, which followed a different trend among the studied species in accordance with the ecology of the collection areas of the species. Sesquiterpenes were predominant in C. kua and, in part, in C. ornifolia; monoterpenes were predominant in C. planifrons and C. parvifolia, whereas oxygenated monoterpenes were predominant in C. socotrana. A high number of the so-called other volatile components were found in C. planifrons. The dominant compounds were γ-cadinene in both accessions of C. kua, β-eudesmol in the first accession of C. ornifolia and δ-cadinene in its second accession, limonene in both accessions of both C. planifrons and C. parvifolia, terpinen-4-ol in both accessions of C. socotrana. The meaning of the data was considered under the chemophenetic, ecological and ethnobotanical aspects.