Abstract
Lippia lacunosa e L. rotundifolia sao duas especies brasileiras que formam um complexo de dificil delimitacao taxonomica. A composicao quimica do oleo essencial das folhas e flores dessas plantas foi investigada por cromatografia com fase gasosa (CG) e por cromatografia com fase gasosa acoplada a espectrometria de massas (CG-EM). Principais constituintes dos oleos essenciais de L. lacunosa (flores e folhas): mirceno (14,7% e 11,9%), mircenona (45,2% e 64,2%), Z-ocimenona (5,7% e 5,2%), e E-ocimenona (14,7% e 4,1%), respectivamente; L. rotundifolia (flores e folhas): a-pineno (8,7% e 1,8%), mirceno (5,1% e 3,6%), limoneno (26,0% e 7,9 %), cis-pinocanfona (4,5% e 3,1%) e mirtenal (22,3% e 16,7%), respectivamente. Os oleos essenciais de L. lacunosa apresentaram um forte e agradavel aroma de manga, que foi relacionado a presenca de mirceno e mircenona. Diferencas fundamentais na composicao quimica de seus oleos essenciais podem representar uma poderosa ferramenta na classificacao botânica das especies.
Highlights
The genus Lippia (Verbenaceae) comprises about 200 species occurring mainly in Central and South America, as Vol 19, No 7, 2008 included Acantholippia, Aloysia and Phyla in their concept of Lippia.[3,4] Some species, like L. alba and L. graveolens are largely used in folk medicine and culinary.[1]
The composition of the essential oils from leaves and flowers of these plants was investigated by gas chromatography (GC) and gas chromatography coupled with mass spectrometry (GC-mass spectra (MS)) analysis
The essential oils from leaves and flowers of L. lacunosa and from the flowers of L. rotundifolia showed a high content of monoterpenes and very low contents of sesquiterpenes
Summary
The genus Lippia (Verbenaceae) comprises about 200 species occurring mainly in Central and South America, as Vol 19, No 7, 2008 included Acantholippia, Aloysia and Phyla in their concept of Lippia.[3,4] Some species, like L. alba and L. graveolens are largely used in folk medicine and culinary.[1]. The composition of the essential oils from leaves and flowers of these plants was investigated by gas chromatography (GC) and gas chromatography coupled with mass spectrometry (GC-MS) analysis. The essential oils from L. lacunosa exhibited a strong and pleasant mango aroma, which was related to the presence of myrcene and myrcenone.
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