Essential Oil Composition of Two Species ofEremostachysfrom Iran (E. adenanthaJaub. et Spach andE. macrophyllaMontbr. et Auch.)

Abstract

The essential oils of Eremostachys adenantha and Eremostachys macrophylla have been investigated by GC and GC/MS. Seventy-six compounds of E. adenantha and thirty-five of E. macrophylla representing 91.2% and 92.9% of the oils were identified, respectively. The main constituents of the oil of E. adenantha were dodecanal (12.7%), hexadecanoic acid (9.9%) and 6,10,14-trimethyl-2-pentadecanone (9.0%); while for E. macrophylla, they were spathulenol (23.4%), hexadecanoic acid (13.5%) and caryophyllene oxide (9.3%).

A Review on Major Constituents of Various Essential Oils and its Application

“…These constituents were different from those seen in previous studies on the same species [32][33][34]. Based on various parameters like time of collection, climate and the ground composition of the sampling area, in addition to the growth stages of the plant, chemical composition of the essential oil of the same species can change [35].…”

Chemical Composition of the Essential Oil from Aerial parts of Eremostachys Macrophylla Montbr. & Auch from Northeast of Iran

“…This study showed considerable amounts of hexadecanoic acid (27.5%), ethyl linoleate (8.5%), 6-methyl-α-ionone (8.0%). These major constituents were different from those seen in previous studies on the same species [5][6][7]. These results demonstrated that the chemical composition of the essential oil of the same species can change depending on a variety of conditions, including climate, time of collection, and the ground composition of the sampling area, in addition to the growth stages of the plant.…”

“…It is evident from the above data, that there are significant differences in the results of the current study with previous ones [5][6][7] for the aerial parts of E. macrophylla. There may be differences related to environmental conditions such as climate, altitude, collection time, ground composition of the sampling area and different growth stages such as pre-flowering, fresh flowering and air-dried-flowering stages.…”

“…However, a previous study [6] on volatile oil from aerial parts of E. macrophylla found, among the thirty-five identified compounds comprising 92.9% of the oil, that the major components were spathulenol (23.4%), hexadecanoic acid (13.5%) and caryophyllene oxide (9.3%). On the other hand, another study [7] of oil from the aerial parts of this plant reported that, of the sixteen identified compounds comprising 96.4% of the oil, the major ones were germacrene-D (47.1%), germacrene-B (17.8%), γ-elemene (9.1%), myrcene (6.7%), β-elemene (2.7%), and β-phellandrene (2.6%).…”

“…During the past decade, seven investigations have been carried out on the chemical composition of the essential oils of the genus Eremostachys. These studies include the analysis of the fresh aerial parts of Eremostachys laciniata Bunge from Jordan [3], flowers, stems, and roots of Eremostachys laevigata from Iran [4], flower, leaf and stem of Eremostachys macrophylla and the aerial parts of Eremostachys labiosa from Iran [5], the aerial parts of Eremostachys adenantha and Eremostachys macrophylla from Iran [6], the aerial parts of Eremostachys macrophylla from Central Iran [7], the aerial parts of Eremostachys laevigata Bge. From Iran [8] and the aerial parts of Eremostachys laciniata Bge.…”