Comparative chemical analysis of volatile compounds of
            <i>Echinops ilicifolius</i>
            using hydrodistillation and headspace solid-phase microextraction and the antibacterial activities of its essential oil

Mohebat, Razieh; Bidoki, Mina Zare

doi:10.1098/rsos.171424

Cited by 10 publications

(5 citation statements)

References 24 publications

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“…This finding indicates that HS-SPME results tend to depend on the balance in the absorption-desorption process, which does not guarantee that the metabolites best captured by the fibers are the most abundant in the sample. In addition, as in other studies [20][21][22], the components identified by hydrodistillation are greater than those obtained by HS-SPME. Therefore, despite the shorter analysis time and the preservation of the sample, HS-SPME remains a limited tool for the characterization of a large number of the compounds present in a complex sample.…”

Section: Discussionsupporting

confidence: 80%

Volatilome and Essential Oil of Ulomoides dermestoides: A Broad-Spectrum Medical Insect

et al. 2021

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Ulomoides dermestoides are used as a broad-spectrum medical insect in the alternative treatment of various diseases. Preliminary volatilome studies carried out to date have shown, as the main components, methyl-1,4-benzoquinone, ethyl-1,4-benzoquinone, 1-tridecene, 1-pentadecene, and limonene. This work focused on the production of metabolites and their metabolic variations in U. dermestoides under stress conditions to provide additional valuable information to help better understand the broad-spectrum medical uses. To this end, VOCs were characterized by HS-SPME with PEG and CAR/PDMS fibers, and the first reported insect essential oils were obtained. In HS-SMPE, we found 17 terpenes, six quinones, five alkenes, and four aromatic compounds; in the essential oils, 53 terpenes, 54 carboxylic acids and derivatives, three alkynes, 12 alkenes (1-Pentadecene, EOT1: 77.6% and EOT2: 57.9%), 28 alkanes, nine alkyl disulfides, three aromatic compounds, 19 alcohols, three quinones, and 12 aldehydes were identified. Between both study approaches, a total of 171 secondary metabolites were identified with no previous report for U. dermestoides. A considerable number of the identified metabolites showed previous studies of the activity of pharmacological interest. Therefore, considering the wide variety of activities reported for these metabolites, this work allows a broader vision of the therapeutic potential of U. dermestoides in traditional medicine.

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Section: Discussionsupporting

confidence: 80%

Volatilome and Essential Oil of Ulomoides dermestoides: A Broad-Spectrum Medical Insect

et al. 2021

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“…In these studies, the essential oils were extracted from a variety of different organs including the roots and aerial organs (stems, leaves, flowers, tubers). Table 4 summarizes the results of these studies and compares them to our current investigation [ 20 , 21 , 22 , 23 , 24 , 25 ]. These data shown in Table 4 reveal great qualitative and quantitative differences between the constituents of the EOs among the different Echinops species.…”

Section: Discussionmentioning

confidence: 97%

“…The chemical compositions of the essential oils of other Echinops species were investigated [ 20 , 21 , 22 , 23 , 24 , 25 ]. In these studies, the essential oils were extracted from a variety of different organs including the roots and aerial organs (stems, leaves, flowers, tubers).…”

Section: Discussionmentioning

confidence: 99%

Exploring Echinops polyceras Boiss. from Jordan: Essential Oil Composition, COX, Protein Denaturation Inhibitory Power and Antimicrobial Activity of the Alcoholic Extract

Hasan,

Shakya,

Al-Jaber

et al. 2023

Molecules

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In this article, we present the first detailed analysis of the hydro-distilled essential oil (HDEO) of the inflorescence heads of Echinops polyceras Boiss. (Asteraceae) from the flora of Jordan, offering observations at different growth (pre-flowering, full-flowering and post-flowering) stages. Additionally, we investigated the methanolic extract obtained from the aerial parts of the plant material at the full flowering stage in order to determine its inhibitory activity in terms of COX and protein denaturation and evaluate its antimicrobial effects against S. aureus (Gram-positive) and E. coli (Gram-negative) bacteria. Performing GC/MS analysis of HDEO, obtained from the fresh inflorescence heads at the different growth stages, resulted in the identification of 192 constituents. The main class of compounds detected in these three stages comprised aliphatic hydrocarbons and their derivatives, which amounted to 50.04% (pre-flower), 40.28% (full-flower) and 41.34% (post-flower) of the total composition. The oils also contained appreciable amounts of oxygenated terpenoids, primarily sesquiterpenoids and diterpenoids. The pre-flowering stage was dominated by (2E)-hexenal (8.03%) in addition to the oxygenated diterpene (6E,10E)-pseudo phytol (7.54%). The full-flowering stage primarily contained (6E,10E)-pseudo phytol (7.84%), β-bisabolene (7.53%, SH) and the diterpene hydrocarbon dolabradiene (5.50%). The major constituents detected in the HDEO obtained at the post-flowering stage included the oxygenated sesquiterpenoid intermedeol (5.53%), the sesquiterpene hydrocarbon (E)-caryophyllene (5.01%) and (6E,10E)-pseudo phytol (4.47%). The methanolic extract obtained from air-dried aerial parts of E. polyceras displayed more COX-2 inhibition than COX-1 inhibition at a concentration level of 200 µg/mL. The extract exhibited a capacity to inhibit protein denaturation that was comparable with respect to the activity of diclofenac sodium and displayed moderate levels of antimicrobial activity against both bacterial species. The current results demonstrate the need to perform further detailed phytochemical investigations to isolate and characterize active constituents.

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“…Solid-phase microextraction (SPME) and supercritical fluid extraction (SFE) are two widely used extraction methods for the analysis of volatiles in tea flowers. SPME is a sensitive, fast, and solvent-free analytical technique that is suitable for analyzing the headspace of flowers, such as Echinops ilicifolius, and tea . Linalool, geraniol, linalool oxides, acetophenone, pentadienal, benzaldehyde, and hexanoic acid have been shown to be the main volatiles in tea flowers using SPME .…”

Section: Introductionmentioning

confidence: 99%

Distribution of and Temporal Variation in Volatiles in Tea (Camellia sinensis) Flowers during the Opening Stages

Cui,

Zhou,

et al. 2023

J. Agric. Food Chem.

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Comparative chemical analysis of volatile compounds of Echinops ilicifolius using hydrodistillation and headspace solid-phase microextraction and the antibacterial activities of its essential oil

Cited by 10 publications

References 24 publications

Volatilome and Essential Oil of Ulomoides dermestoides: A Broad-Spectrum Medical Insect

Volatilome and Essential Oil of Ulomoides dermestoides: A Broad-Spectrum Medical Insect

Exploring Echinops polyceras Boiss. from Jordan: Essential Oil Composition, COX, Protein Denaturation Inhibitory Power and Antimicrobial Activity of the Alcoholic Extract

Distribution of and Temporal Variation in Volatiles in Tea (Camellia sinensis) Flowers during the Opening Stages

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