Screening of the odour-activity and bioactivity of the essential oils of leaves and flowers of Hyptis Passerina Mart. from the Brazilian Cerrado
In: Journal of the Brazilian Chemical Society, Jg. 20 (2009), Heft 2
Online
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Zugriff:
The chemical profile of the essential oils obtained from the leaves and flowers of Hyptis passerina Mart., a rare species of the Brazilian Cerrado, has been determined for the first time. Analyses by GC-MS showed sesquiterpenes as major compounds. β-epi-acorenol (35.7% and 32.8%, respectively from leaf and flower essential oils), was isolated and identified by 1D and 2D NMR. The flower-derived oil presented a higher concentration of hydrocarbon and oxygenated monoterpenes, while the leaf-oil was richer in diterpenes. The global odour impressions of both oils were given by direct analysis and GC-MS-O and were characterized as herbaceous with tea notes, and green, cooked and woody impressions for leaf-oil; herbaceous, with spicy, woody and minty notes for flower-oil. β-epi-acorenol, spathulenol, β-caryophyllene, and caryophyllene oxide were relevant for the odour-activity of both oils, as well as minor constituents, such as linalool. The antimicrobial activity was investigated by means of agar diffusion disc method and contact bioautography, against Gram-positive and negative bacteria and yeast. Both oils presented to be bioactive against the tested microorganisms with significant inhibition level.
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Screening of the odour-activity and bioactivity of the essential oils of leaves and flowers of Hyptis Passerina Mart. from the Brazilian Cerrado
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Autor/in / Beteiligte Person: | Zellner, Barbara D. ; Amorim, Ana Carolina L. ; Miranda, Ana Luisa P. de ; Alves, Ruy J. V. ; Barbosa, Jussara P. ; Costa, Gisela L. da ; Rezende, Claudia M. |
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Zeitschrift: | Journal of the Brazilian Chemical Society, Jg. 20 (2009), Heft 2 |
Veröffentlichung: | Sociedade Brasileira de Química, 2009 |
Medientyp: | academicJournal |
ISSN: | 0103-5053 (print) |
DOI: | 10.1590/S0103-50532009000200018 |
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