Investigations on the spontaneous emitted and hydrodistilled volatiles of Platycladus orientalis (L.) Franco grown in four different biogeographic zones of Jordan

• Published in: Biochemical systematics and ecology 2020-10, Vol.92, p.104109, Article 104109
• Main Authors: Al-Mahmood, Osama A., Aboalhaija, Nour H., Abaza, Ismail F., Talib, Wamidh H., Afifi, Fatma U.
• Format: Article
• Language: English
• Subjects: Cupressaceae; GC/MS; Hierarchical cluster analysis; Leaves; SPME; Volatile organic compounds
• ISSN: 0305-1978; 1873-2925
• DOI: 10.1016/j.bse.2020.104109

The essential oil of the fresh leaves of Platycladus orientalis (L.), grown in four different biogeographic zones of Jordan,- (the Mediterranean, Irano-Turanian, Saharo-Arabian, and Sudanian penetration) -, were obtained by hydrodistillation and analysed by gas chromatography (GC) and gas chromatography-mass-spectrometry (GC/MS). The actual composition of the spontaneous emitted volatiles was obtained using the solid-phase-micro-extraction (SPME) method and investigated using the same chromatographic and spectroscopic methods. Hydrocarbon monoterpenes dominated the hydrodistilled oils and emissions of all regions. Bicyclic monoterpenes (sabinene, α-pinene, and α-thujene) and monocyclic α-terpinene were detected as the major constituents of the oils and emissions. Additionally, hierarchical cluster analysis (HCA) revealed that the clustering is based on the region of collection rather than the applied methodology. Differences were observed in the quantity of the obtained oils (P-values