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Hyptis colombiana (Lamiaceae family), a species also treated as Cantinoa colombiana in a recently segregated genus from Hyptis, is a perennial herb or subshrub native to the Andes of northern South America. H. colombiana leaves are commonly used in traditional medicine to treat respiratory and digestive illnesses. In this study, H. colombiana plant...
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... would help in reducing alterations in the chemical composition and antioxidant activity of their EOs and extracts. Table 1 shows the yields of EOs distilled by microwave-assisted hydrodistillation (MWHD) and the hydroalcoholic extracts obtained from fresh or post-distillation plant materials. The plant aerial parts were collected at the three phenological stages, i.e., vegetative, flowering, and post-flowering. ...Context 2
... yields of EOs and hydroalcoholic extracts obtained from dried plant materials of H. colombiana before and after its distillation were similar for plants collected at three phenological stages (Table S1). The yields of the EOs obtained were higher than those reported by Flores et al. [19] (0.4% (w/w)) for plants grown in Venezuela. ...Context 3
... Materials: The following supporting information can be downloaded online: https: //www.mdpi.com/article/10.3390/molecules28196767/s1, Table S1. Results of the analysis of variance, which was conducted to assess how different phenological stages of H. colombiana plants affect the yields of EO and plant material extracts before and after distillation. ...Citations
... In the present paper, the biological properties of the essential oils from the various fractions of this species were not evaluated due to the limited amount of oil available. However, germacrene D, the major component of these oils is a hydrocarbon sesquiterpene for which a number of bioactivities have previously been reported [97][98][99][100]. It would be interesting to study the phenology of this compound in this species to evaluate the usefulness of E. dilatatum oils for attracting/repelling insects or for allopathic and antimicrobial activities. ...
Eryngium dilatatum Lam. is a thorny Iberian Peninsula endemic species belonging to the Apiaceae family that has not been previously analysed from a chemical point of view. Following our studies on this genus, we characterized the chemical composition of the essential oils from the different parts (inflorescences, stems + leaves, and roots) of this species; these parts were gathered in Cádiz (Spain). The specimens were collected in July during the flowering period and air-dried before the oil extraction by hydro-distillation. The essential oils were analysed by gas chromatography and gas chromatography coupled with mass spectrometry. The different parts of the plant yielded low amounts of pale yellow oil, with the roots being the fraction that provided the lowest amount of oil. The chemical characterization of the essential oils showed qualitative and quantitative differences between the fractions examined, but all of them showed the same principal compound, germacrene D (9.1–46.5%). Similarly, all the fractions shared most of their representative constituents, with their percentage compositions being different from one sample to the other: α-cadinol (3.8%), bicyclogermacrene (3.5%), octanal (3.1%), and spathulenol (2.5%) were found in the inflorescences; octanal (8.1%), α-cadinol (3.7%), δ-cadinene (3.6%), (E)-caryophyllene (2.6%), bicyclogermacrene (2.5%), and spathulenol (2.4%) were found in the stems and leaves; and spathulenol (4.6%), α-cadinol (4.4%), khusinol (3.2%), α-muurolol (3.1%), and δ-cadinene (2.6%) were found in the roots. As far as we know, this is the first report about the chemical composition of this endemic species of the Iberian Peninsula. It contributes to the knowledge of this species and to the genus to which it belongs. This species could be considered as a natural source of germacrene D, which is a sesquiterpene hydrocarbon with active properties.
The Caribbean shrub, Clinopodium vimineum, had its essential oil (EO) and hydroalcoholic extracts analyzed across three growth stages: vegetative, flowering, and post-flowering. The chemical composition of the EOs was analyzed by GC/MS/FID and that of the extracts was studied by UHPLC/ESIQ-Orbitrap-MS. Twenty six compounds (>0.1%) were detected in the EOs of C. vimineum. p-Menth3-en-8-ol (35–40%) and pulegone (27–30%) were the major components. Among the hydroalcoholic extracts, hydroxycinnamic acids (18–46 mg/g) and glycosylated flavones (17–19 mg/g) were
found. The amounts of rosmarinic acid (20–40 mg/g) in the extracts isolated from the hydrodistillation residual biomass were twice as high as those in the extracts from the fresh plant material. The antioxidant activity of the EOs and extracts was evaluated by the ABTS and ORAC assays. No significant differences (p > 0.05) were found in the chemical composition or antioxidant activity of EOs and hydroalcoholic extracts, obtained from plants collected at different phenological stages.
