117,326 research outputs found
Volatile constituents of different parts (roots, stem and leaves) of Smyrnium olusatrum L.
No full textSmyrnium olusatrum L. is a biennal plant growing in Western and South Europe. Several phytochemical studies identified flavonoids, phenolic acids and sesquiterpene lactones as main constituents. In this work the root, stem, and leaf essential oils of Smyrnium olusatrum L. (Umbelliferae) collected in Urbino (Marche, Italy) were studied by GC and GC-MS. Myrcene (1%, 13%, 14%), β-phellandrene (34%, 17%, 9%), β-caryophyllene (1%, 3%, 12%), furanodiene (19%, 8%, 17%), curzerene (13%, 6%,12%), germacrene B (7%, 14%, 10%) and germacrone (8%, 7%, 8%) were identified as the major components in the root, stem, and leaf oils, respectively. SPME analysis of fresh material of the same different organs showed β-myrcene (3%, 21%, 36%), β-phellandrene (25%, 34%, 12%), β-caryophyllene (1%, 7%, 22%) and furanodiene (4%, 7%, 7%) as typical components in the headspace of fresh roots, stems and leaves, respectively
Antioxidant and antifungal activity of different extracts obtained from aerial parts of Inula crithmoides L
No full text: The total phenolic content, antioxidant and antifungal activities of three Inula crithmoides extracts (n-hexane, methylene chloride and MeOH) were investigated. The methanolic extract showed the highest total phenolic content. In the DPPH assay, the methanolic and hexane extracts exhibited the highest DPPH-radical scavenging activity; in the 5-lipoxygenase assay, the hexane extract showed greater inhibitory effect with an IC50 similar to that of Trolox and ascorbic acid. The antifungal activity of the methanolic extract revealed a higher activity against Phytophtora cryptogea and Alternaria solani
Plant Extracts as Antimicrobial Agents in Sustainable Conservation of Erythrina caffra (Fabaceae) Historical Trees
No full textMicrobial colonization plays a relevant role in the biodegradation and biodeterioration of cultural and natural heritage, representing a revealing problem in conservation strategy. In this study, the essential oil (EO) and hydro-alcoholic extract (HAE) of Origanum vulgare L. (Lamiaceae),
an aromatic perennial plant, representative of the Mediterranean basin, growing spontaneously and cultivated all over the world, were analysed. Natural products, such as essential oil and hydroalcoholic extract, have strong antiseptic and antimicrobial properties and are ad hoc applied for the sustainable conservation of Erithryna caffra (Fabaceae). The main taxa revealed in the damaging of these arboreal heritage, are Bacillus sp., Streptomyces sp. and Terribacillus sp. (as bacteria), Alternaria sp., Aspergillus sp. and Chaetomium sp. (as fungi). GS-MS analysis identified carvacrol, thymol and their biosynthetic precursors g-terpinene and p-cymene, as main components, and the antimicrobial efficiency assayed by in vitro methods (Agar Dish Diffusion, Well Plate Diffusion). In this study, by combining the application/exposure of both HAE and EO, the bacterial and fungal colonies development has been in vitro countered. The results confirm the possible use of plant products as a valid alternative to the traditional synthetic chemical biocides, with full respect to the environment
Chemical composition and antioxidant activity of the essential oil of Teucrium massiliense L.
No full textThe chemical composition of the essential oil obtained from the aerial parts of Teucrium massiliense L. was analyzed by GC and GC/MS and the components identified were 34, mainly 3,7-dimethyloctan-2-one (15.2%), butyl 2-methylbutyrate (12.1%), linalool (10.6%), linalyl acetate (7.1%), zingiberene (4.7%), γ-cadinene (4.1%). The anti-oxidant activity of the oil was evaluated by the DPPH test, where the oil showed an effect comparable to Trolox, and by lipid peroxidation test, where the activity of the oil was three time less effective than that of Trolox
Volatile constituents of micropropagated plants of Bupleurum fruticosum L
No full textThe essential oil and solid phase micro extraction (SPME) samples of Bupleurum fruticosum micropropagated plants were analysed by GC and GC–MS and compared with those obtained from the leaves and the stems of field-grown parent plants. The main constituents of the essential oil of the micropropagated plants were_-phellandrene (61%), sabinene (13%), terpinen-4-ol, tricyclene and bicyclogermacrene (3%). Regarding to the field-grown B. fruticosum plants, the leaf essential oil showed the same major components detected in the micropropagated plants, while the stem oil showed - terpinene (50%) and - α-phellandrene (18%) as the most important constituents. Furthermore, SPME analyses were carried out in order to show for the first time a complete investigation on the volatile organic constituents of the micropopagated and field-grown B. fruticosum parent plants
Volatile constituents of micropropagated plants Bupleurum fruticosum L
No full textThe essential oil and solid phase micro extraction (SPME) samples of Bupleurum fruticosum micropropagated plants were analysed by GC and GC–MS and compared with those obtained from the leaves and the stems of field-grown parent plants. The main constituents of the essential oil of the micropropagated plants were -phellandrene (61%), sabinene (13%), terpinen-4-ol, tricyclene and bicyclogermacrene (3%). Regarding to the field-grown B. fruticosum plants, the leaf essential oil showed the same major components detected in the micropropagated plants, while the stem oil showed -terpinene (50%) and -phellandrene (18%) as the most important constituents. Furthermore, SPME analyses were carried out in order to show for the first time a complete investigation on the volatile organic constituents of the micropopagated and field-grown B. fruticosum parent plants
Chemical Composition and Antifungal Activity of Essential Oil Obtained from In Vitro Plants of Thymus mastichina L.
No full textThe effect of triacontanol on micropropagation and on secretory system of Thymus mastichina.
No full textShoot multiplication of Thymus mastichina L. was achieved on media containing 0.1 mg l−1 6-benzyladenine and/or 0.1 mg l−1 indole-3-butyric acid, or in hormone-free medium (control). The growth of plantlets, the production and composition of the essential oil, the density and secretory stage of glandular hairs have been evaluated in the presence and absence of growth regulators and triacontanol. We observed a positive effect of triacontanol on the growth of micropropagated plantlets using different conditions. Media with different levels of BA, IBA and TRIA resulted in no differences in the composition of the essential oil produced by plantlets. The major components of the oil were 1,8-cineole and linalool. An increase in the oil yield was observed especially when triacontanol was added to hormone-free medium. There was no correlation between changes in the oil yield and glandular hairs density, but the yield was dependent on the secretory stage of the glands
The Effect of Triacontanol on Micropropagation and on Secretory System of Thymus mastichina L
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