The essential oil compositions of two Eucalyptus sp. (E. camaldulensis Dehnh. and E. torquata Luehm.) naturalized to Cyprus

The genus Eucalyptus belonging to the Myrtaceae family, consists of tall, evergreen trees with leathery leaves. They are indigenous to Australia and contain about 900 species and subspecies. One important use is production of essential oils, which are valuable in both medicinal and pharmaceutical industries. There are about 62 species of Eucalyptus naturalized to Cyprus including E. camaldulensis and E. torquata. The essential oil constituents of leaves of these two species of Eucalyptus collected from Northern Cyprus were isolated by hydro-distillation and analyzed by GC and GC/MS, simultaneously. E. camaldulensis oil yield was higher (2.4%), and major compounds identified were alpha-phellandrene (10.3%) and beta-phellandrene (30.6%), respectively. These compounds were followed by p-cymene (8.2%), bicyclogermacrene (6.1%) and spathulenol (9.3%). On the other hand, E. torquata oil yield was relatively lower (1.6%), with major compounds being alpha-pinene (18.6%), 1,8-cineole (18.8%), beta-eudesmol (10.3%) and torquatone (29.2%).

Automated summary

The genus Eucalyptus, native to Australia, consists of tall evergreen trees that produce essential oils. In Cyprus, there are 62 naturalized species, including E. camaldulensis and E. torquata. The essential oils extracted from the leaves of these two species were analyzed, with E. camaldulensis having a higher oil yield and containing alpha-phellandrene and beta-phellandrene as major constituents. E. torquata had a lower oil yield and contained alpha-pinene, 1,8-cineole, beta-eudesmol, and torquatone as major compounds.