title: Comparative analysis of essential oil components of two Pinus species from Taibai Mountain in China.
abstract: Gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) were used to compare between the essential oil components from needles of Pinus armandii Franch versus P. tabulaeformis Carr., growing on the same site at Taibai Mountain, China. Under optimum extraction and analysis conditions, 65 and 66 constituents each were identified in P. armandii and P. tabulaeformis, which accounted for 87.9% and 87.1%, respectively, of their oils. Based on their terpene compositions, we concluded that these species belong to a high-caryophyllene chemotype, with sesquiterpenes comprising 54.4% to 54.8% of the total contents. We also determined minor qualitative and major quantitative variations in some compounds. Compared with that from P. tabulaeformis, P. armandii oil had more gamma-muurolene (7.5%), terpinolene (5.8%), and longifolene (5.7%). In contrast, alpha-pinene (8.6%) and caryophyllene oxide (7.4%) were the dominant compounds in P. tabulaeformis.
authors.affiliation: Key Laboratory of the Ministry of Education for Medicinal Resource and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi 710062, PR China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Zhezhi
authors.initials: Z
authors.lastname: Wang
mesh_terms: D002681:China; D002849:Chromatography, Gas; D008401:Gas Chromatography-Mass Spectrometry; D009822:Oils, Volatile / Q000032:analysis*; D028223:Pinus / Q000737:chemistry*
chemical_list: D009822:Oils, Volatile