Comparison of chemical composition of the essential oils from different parts of Thuja occidentalis L. ‘Brabant’ and T. occidentalis L. ‘Smaragd’

Abstract

S u m m a r yIntroduction: Thuja occidentalis 'Brabant' and T. occidentalis 'Smaragd' are widely planted as decoration in parks and as hedges in domestic gardens in Poland. Objective: The aim of the study was to determine the yield and the composition of essential oils from different parts of these cultivars. Methods: The essential oils were obtained by hydrodistillation, and then analyzed by GC/MS. Results: Over seventy compounds were identified. The oils from leaves, twigs with leaves and twigs without leaves of 'Brabant' variety contained mainly α-thujone (61.0-64.4%), β-thujone (10.4-10.7%) and fenchone (7.7-8.0%), whereas in the cone oil there were α-thujone (42.1%), sabinene (11.2%) and β-thujone (10.2%). The main constituents of the oil from leaves and twigs with leaves of 'Smaragd' variety were α-thujone (49.2-49.3%), beyerene (12.8-13.2%) and sabinene (8.9-9.3%). Conclusions: The yield and chemical composition of the essential oil of T. occidentalis depend on the variety and plant organ. The oil of 'Brabant' variety contained more thujones and less diterpenes in comparison with the oil of 'Smaragd' variety.

Potential of Thuja occidentalis L. Essential Oil and Water Extracts against Field Crop Pests

“…The qualitative composition of most constituents complies with the literature data. Some differences were also observed, such as the higher content of sabinene, terpien-4-ol, and bornyl acetate [16,45,46]. Keita et al [13] identified 22 EO components from T. occidentalis, with α-thujone (49.60%), fenchone (14.03%), and β-thujone (9.05%) being dominant, as in the present experiment.…”

“…Some diterpenes were also found in this essential oil, which is a group of terpenoids characteristic of coniferous trees. Byerene was the dominant compound among this group (1.1-12.8%) [16]. The correlation between essential oil composition and plant origin is well known.…”

“…Thuja occidentalis L. (Cupressaceae) is a plant native to North America [13], known for its numerous medicinal properties [9,14,15], and used as an ornamental plant in many parts of the world [3,16]. EO extracted from various parts of this plant has been studied for its antimicrobial effects [17,18] as well as its insecticidal effects [19][20][21][22][23][24][25][26].…”

“…The composition of EOTO has been analyzed many times [3,16,27,28]. The main group of constituents identified in EOTO were oxygenated monoterpenes (64.8-87.3%), among which α-thujone was identified in the largest amounts (20.1-61.0%).…”

Fumigant and repellent potentials of Ricinus communis and Mentha pulegium essential oils against Tribolium castaneum and Lasioderma serricorne

“…Nevertheless, a previous study focusing on Ricinus communis EO aerial parts in Tunisia showed that oxygenated monoterpenes had the highest percentage with 75.61% with α-thujone (31.71%) and 1,8-cineole (30.98%) as the main compounds of this EO. [40] Thus, according to Lis et al [41] , the chemical composition of the EO depends on several factors such as plant organ (leaves, flowers, stems, etc.). In fact, depending on this factor, several EOs of the same plant with different chemical compositions and biological activities can be formed.…”