Zheljazkov Vaitcho D, Astatkie Tess, Jeliazkova Ekaterina A, Heidel Bonnie, Ciampa Lyn
Nat Prod Commun. 2017 Feb;12(2):201-204.
The objective of this study was to evaluate variations in leaf essential oil (EO) content and composition of Juniperus species in the Bighorn Mountains {J comimunis L. (common juniper), J. horizontalis Moench. (creeping juniper), and J scopulorum Sarg. (Rocky Mountain juniper)} in Wyoming, USA. The EO was extracted via steam distillation of fresh leaves (needles). The EO composition of the three Juniper species varied widely. Overall, the essential oil content of fresh leaves was 1.0% (0.4-1.8% range in different accessions) in J. communis, 1.3% (1.2 to 1.6% range) in J. horizontalis, and 1.1% (0.7-1.5% range) in J. scopulorln. The EO chemical profile of J. communis was very different from that of the other two species. The concentration of α-pinene in the oil was 67- 80% in J. communis, 2.8-6% in J. horizontalis, and 2.3-13% in J. scopulorun. The concentration of sabinene was 57-61% of the oil of J. horizontalis and 13- 59%. in oil of J. scopulorum, whereas sabinene was either below 1% or not detected in J. communis. The oils of J scopulorm and J horizontalis had higher antioxidant capacity than that of J. communis. The oils of the three junipers did not show significant antimicrobial activity against 10 organisms. The diversity of the essential oil composition of these three junipers may encourage diverse industrial applications of Juniperus leaf essential oil.
本研究的目的是评估美国怀俄明州大角山地区杜松属物种（杜松Juniperus communis L.、匍匐刺柏J. horizontalis Moench.和洛矶山刺柏J. scopulorum Sarg.）叶片精油（EO）含量及成分的差异。通过对新鲜叶片（针叶）进行水蒸气蒸馏提取精油。这三种杜松属物种的精油成分差异很大。总体而言，杜松新鲜叶片的精油含量为1.0%（不同种质范围为0.4 - 1.8%），匍匐刺柏为1.3%（范围为1.2%至1.6%），洛矶山刺柏为1.1%（范围为0.7 - 1.5%）。杜松的精油化学特征与其他两个物种有很大不同。杜松精油中α-蒎烯的含量为67 - 80%，匍匐刺柏中为2.8 - 6%，洛矶山刺柏中为2.3 - 13%。桧烯的含量在匍匐刺柏精油中占57 - 61%，在洛矶山刺柏精油中占13 - 59%，而在杜松中桧烯含量低于1%或未检测到。洛矶山刺柏和匍匐刺柏的精油抗氧化能力高于杜松。这三种杜松的精油对10种微生物均未表现出显著的抗菌活性。这三种杜松精油成分的多样性可能会促进杜松属叶片精油在不同工业领域的应用。
