Volatiles from <i>Plicanthus hirtellus</i> (F. Weber) R.M. Schust. and <i>Radula boryana</i> (F. Weber) Nees (Hepaticae) grown in São Tomé e Príncipe Archipelago

Figueiredo, A. Cristina; García, César; Sim‐Sim, Manuela; Sérgio, Cecı́lia; Pedro, Luís G.; Barroso, José G.

doi:10.1002/ffj.1998

Cited by 13 publications

(9 citation statements)

References 12 publications

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“…A fraction designated by others, which was mainly composed of non-aromatic alcohols, non-aromatic aldehydes, hydrocarbons, and fatty acids (1 -31%), reached also, in some cases, The percentage composition of the oils was computed by the normalization method from the GC peak areas, calculated as mean values of two injections from each oil, using the response factors as detailed in [26]. A fraction designated by others, which was mainly composed of non-aromatic alcohols, non-aromatic aldehydes, hydrocarbons, and fatty acids (1 -31%), reached also, in some cases, The percentage composition of the oils was computed by the normalization method from the GC peak areas, calculated as mean values of two injections from each oil, using the response factors as detailed in [26].…”

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confidence: 99%

Volatile‐Oils Composition, and Bioactivity of the Essential Oils of Plectranthus barbatus, P. neochilus, and P. ornatus Grown in Portugal

Mota

Figueiredo

Pedro

et al. 2014

Chemistry & Biodiversity

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Volatile-oils chemical composition and bioactivity of the essentail oils from Plectranthus barbatus, P. neochilus, and P. ornatus (Lamiaceae) were assessed. Aerial parts from these three related Plectranthus species were collected from cultivated plants grown in Portugal, during vegetative and flowering phases. Volatiles, isolated by distillation-extraction, were analyzed by GC and GC/MS. Monoterpene hydrocarbons (12-74%) and sesquiterpene hydrocarbons (4-45%) constituted the main fractions in all volatiles. α-Pinene (3; 12-67%), oct-1-en-3-ol (6; traces-28%), β-pinene (7; 0.1-22%), and β-caryophyllene (50; 7-12%) dominated P. barbatus volatiles. P. neochilus major volatile components were α-terpenyl acetate (41; traces-48%), α-thujone (2; 2-28%), β-caryophyllene (50; 2-28%), β-pinene (7; 1-25%), and α-pinene (3; 1-19%). Oct-1-en-3-ol (6; 13-31%), β-pinene (7; 11-24%), α-pinene (3; 11-19%), and β-caryophyllene (50; traces-11%) were the main constituents from P. ornatus volatiles. These chemical compositions were rather different from those previously found for specimens harvested in Africa and Brazil. Moreover, the volatiles from the flowers are herewith reported for the first time. Essential oils, isolated by hydrodistillation from leaves and stems, showed a yellowish color and unpleasant odor, with yields ranging from 0.08% to 0.84% (v/dry weight). Antioxidant and antimicrobial activities of the essential oils were evaluated by DPPH· and TBARS assays, and agar disc-diffusion method, respectively. Results showed low or moderate antioxidant capacity and significant antimicrobial activity against Gram-positive bacteria.

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confidence: 99%

Volatile‐Oils Composition, and Bioactivity of the Essential Oils of Plectranthus barbatus, P. neochilus, and P. ornatus Grown in Portugal

Mota

Figueiredo

Pedro

et al. 2014

Chemistry & Biodiversity

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“…Two other characteristic components were thymol (50) and carvacrol (51) (Figure 4). [51] This study indicated chemotaxonomical value for the EO composition of Radula species.…”

Section: Leafy Liverwortsmentioning

confidence: 59%

“…A survey of the scientific literature revealed more papers concerning EOs obtained from the Marchantiophyta. These data concern the chemical composition of EOs from such liverwort species as Barbilophozia floerkei, [65] Calypogeia muelleriana, [72] Chandonanthus hirtellus (=Plicanthus hirtellus), [51] Scapania undulata, [73] and Tritomaria polita, [74] among others. However, it is difficult to draw chemotaxonomic conclusions from a single type of data.…”

Section: Leafy Liverwortsmentioning

confidence: 99%

Chemotaxonomic value of essential oil components in liverwort species. A review

Ludwiczuk

Asakawa

2015

Flavour & Fragrance J

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A number of liverwort species are known to emit volatile terpenoids and simple aromatic compounds when crushed. The characteristic odour of these spore-forming plants is associated with oil body constituents. Secondary metabolites, which constitute the oil bodies, are also of value for taxonomic investigations. Liverworts have yielded a rich array of secondary metabolites. Many of these compounds are characterized by unique structures, and some of them have not been found in any other plants, fungi, or marine organisms. Gas chromatographic profiling of the volatile extracts obtained from the liverworts has been applied with success in differentiating liverworts species, and also used to resolve the taxonomic problems at genus and family level. Due to the fact that liverworts are morphologically very small and it is difficult to collect a sufficient amount of plant material, there are few research data on the composition of the essential oils obtained from these plants. Nevertheless, the available data indicate that, as in the case of aromatic plants, the components present in essential oils obtained from the liverworts can be used in chemosystematic studies of this plant group. The aim of this paper is to show whether: (i) there are differences in the essential oils composition between different liverwort species; (ii) it is possible to find chemical markers characteristic for the analysed liverwort species; and (iii) the data derived from an analysis of the essential oils are in accordance with the data received from volatile extracts.

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“…The volume of injection was 0.1 µl of a pentane–volatiles solution (1:1). The percentage composition of the essential oils was computed by the normalization method from the GC peak areas, calculated as mean values of two injections from each sample, using response factors as detailed in Figueiredo et al …”

Section: Methodsmentioning

confidence: 99%

Yield and chemical composition of the essential oil of Moroccan chamomile [Cladanthus mixtus (L.) Chevall.] growing wild at different sites in Morocco

Elouaddari

Elamrani

Eddine

et al. 2013

Flavour & Fragrance J

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The chemical variability of the essential oils isolated from Moroccan chamomile [Cladanthus mixtus (L.) Chevall.] full flowering aerial parts, was evaluated. C. mixtus populations were collected from nine regions in Morocco: Benguerir, Bouznika, Chefchaouane, Kenitra, Meknes, Oujda, Settat, Sidi Alal Ibahraoui and Tamesna. The essential oils were isolated by hydrodistillation and analysed by gas chromatography and gas chromatography–mass spectrometry. The yields of the essential oils ranged between 0.1% and 0.8% (v/d.w.). Only five of the nine essential oil samples analysed showed good correlation after agglomerative cluster analysis based on the chemical composition of the essential oils. These samples (Benguerir, Kenitra, Settat, Meknes and Tamesna) were characterized by the dominance of camphor (14–27%), β‐myrcene (3–17%) and santolina triene (3–15%). All these and Chefchaouane essential oils showed a blue colour, whereas Oujda, Bouznika and Sidi Alal Ibahraoui essential oils were yellow. β‐Myrcene (3–17%), trans‐β‐farnesene (18%) and 2‐tridecanone (16%) dominated the Chefchaouane essential oil, whereas trans‐β‐farnesene (43%) was the main component in the Oujda essential oil. 2‐Methyl‐2‐trans‐butenyl methacrylate (34%) dominated sample Bouznika, while santolina alcohol and 1,8‐cineole (17% and 12%, respectively) in the Sidi Alal Ibahraoui essential oil. The variability of Moroccan chamomile essential oil may reflect negatively upon its quality, biological activity and commercial value, thus harvests from the wild population should be avoided. To meet the high‐quality standards and production efficiency, cultivation techniques adapted to local soil types and weather conditions, as well the correct selection of plant varieties most suited to the market should be followed. Copyright © 2013 John Wiley & Sons, Ltd.

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Volatiles from Plicanthus hirtellus (F. Weber) R.M. Schust. and Radula boryana (F. Weber) Nees (Hepaticae) grown in São Tomé e Príncipe Archipelago

Cited by 13 publications

References 12 publications

Volatile‐Oils Composition, and Bioactivity of the Essential Oils of Plectranthus barbatus, P. neochilus, and P. ornatus Grown in Portugal

Volatile‐Oils Composition, and Bioactivity of the Essential Oils of Plectranthus barbatus, P. neochilus, and P. ornatus Grown in Portugal

Chemotaxonomic value of essential oil components in liverwort species. A review

Yield and chemical composition of the essential oil of Moroccan chamomile [Cladanthus mixtus (L.) Chevall.] growing wild at different sites in Morocco

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