Comparative analysis of essential oil containing raw materials of honeyherb (Lippia dulcis Trevir.) under different growing conditions

Abstract

The use of plant raw materials is one of the areas of modern pharmaceutical science in the production of herbal drugs. In this regard, one of the oldest medicinal plants, Lippia dulcis Trevir (Phyla scaberrima (Juss. ex Pers.) Moldenke) from Verbenaceae family, is of great interest. According to traditional Mexican medicine, Lippia dulcis is used in the treatment of colds, coughs, bronchitis, and digestive disorders as an anti-inflammatory, antitussive, antipyretic, expectorant, emollient and diuretic agent.
 The aim. The aim of our study was to identify and determine the quantitative content of essential oils by GC/MS method in Lippia dulcis herb shoots.
 Materials and methods. The determination of the essential oil composition of Lippia dulcis was conducted using Agilent Technologies' 6890 chromatograph with mass spectrometric detector 5973 (Agilent Technologies, USA).
 Results. The GC/MS method 19 components of essential oil were identified in L. dulcis shoots grown in open soil conditions, the total content of which was 1274.82 μg/g, in L. dulcis shoots grown in closed soil conditions - 23, the total content of which was 2361.11 μg/g. Thus, the total content of essential oil in shoots of L. dulcis grown in closed soil conditions was 1.8 times higher than in shoots of L. dulcis grown in open soil conditions.
 Conclusions. The component composition of the essential oil of L. dulcis shoots harvested from plants grown in open soil conditions (LD-1) and closed soil conditions (LD-2) was investigated using the chromato-mass spectrometric method. The following pharmacologically important components - camphor, germacrene D, caryophyllene, α-bisabolene - were found in both samples of the essential oil of L. dulcis shoots in significant quantities, which indicates the prospects for further technological and pharmacological studies of honey herb raw materials