期刊
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
卷 87, 期 2, 页码 943-953出版社
ACAD BRASILEIRA DE CIENCIAS
DOI: 10.1590/0001-3765201520140376
关键词
campo cerrado; cerrado stricto sensu; external glands; terpenes
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) (TEM/BIOTA) [Proc. 2008/55434-7]
- PROPE/FUNDUNESP [Proc. 0504/011/14]
The essential oils from leaves and inflorescences of Lippia origanoides Kunth present aromatic and medicinal potential and have been used to treat several diseases, including melanoma. In Brazil, L. origanoides is commonly found in campo cerrado and cerrado stricto sensu, physiognomies featured mainly by the differential light conditions to which short and medium-sized plants are subjected. Our aim was to investigate the glandular trichome density and the yield and chemical composition of the essential oils in leaves and inflorescences of L. origanoides from campo cerrado and cerrado stricto sensu. For glandular density analysis, leaves and inflorescences were processed according to conventional techniques for scanning electron microscopy. The essential oils of leaves and inflorescences were obtained by hydrodistillation and identified with gas chromatography. Bracts and sepals showed the highest glandular density, followed by petals and leaves. The glandular density in the abaxial leaf surface was higher in individuals from the campo cerrado. In both populations the essential oil yield was higher in inflorescences than in leaves. The chemical composition of the essential oils varied among individuals from different areas and inside a same population. Our results demonstrated the chemical plasticity of L. origanoides suggesting the importance of monitoring its popular use.
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