| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4513139 | Industrial Crops and Products | 2014 | 7 Pages |
•Araucaria cunninghamii and Araucaria heterophylla are ornamental tree species.•Detailed GC/MS profile of the foliage and resin essential oils was developed.•Foliage essential oils contained significant amounts of tricyclic and tetracyclic diterpenes.•Resin essential oils were dominated by sesquiterpenes.•The essential oils were antibacterial (MIC: 250–500 μg/mL and MBC: 1000–1000 μg/mL).
The essential oils of foliage and resin of Araucaria cunninghamii Aiton ex D.Don and Araucaria heterophylla (Salisb.) Franco were isolated by hydrodistillation and subsequently analyzed using gas chromatography (GC/FID) and GC–mass spectrometry (GC/MS). Altogether 113 constituents, representing 84.0–97.6% of the total oil compositions were identified. Major constituents of the foliage oil of A. cunninghamii were beyerene (34.6–44.4%), caryophyllene oxide (0.5–17.9%), α-pinene (3.3–16.2%), germacrene D (0.1–9.8%), kaurene (1.7–5.1%), and 13-epi-dolabradiene (4.2–4.8%). However, the resin oil of A. cunninghamii was characterized by higher amounts of (E)-caryophyllene (60.8%), caryophyllene oxide (13.4%), and (E)-β-farnesene (4.9%). The foliage oil of A. heterophylla was dominated by 13-epi-dolabradiene (42.7%), beyerene (22.2%), rimuene (13.7%), and dolabradiene (3.9%), whereas the resin oil of A. heterophylla contained α-copaene (29.9%), germacrene D (21.4%), γ-gurjunene (9.7%), δ-cadinene (7.1%), and sandaracopimara-8(14),15-diene (6.5%) as main constituents. The foliage and resin essential oils of both species showed minimum inhibitory concentration (MIC) in the range of 250–500 μg/mL and minimum bactericidal concentration (MBC) in the range of 1000 to >1000 μg/mL against tested bacterial strains.
Graphical abstractChemical constituents of foliage and resin essential oils of Araucaria cunnighamii and Araucaria heterophylla.Figure optionsDownload full-size imageDownload as PowerPoint slide
