Influência do processamento pós-colheita e armazenamento na composição química da droga vegetal e do óleo essencial de carqueja [Baccharis trimera (Less.) DC.]
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Data
2010
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Resumo
Carqueja-amarga [Baccharis trimera (Asteraceae)] is a species from the central south of South America. Qualitative
and quantitative analyses were performed using the technique gas chromatography coupled to
mass spectrometry to evaluate the effect of different post-harvest processing forms of drugs
constituted of parts of “carqueja” on the chemical composition of its essential oil. The variation in
the chemical composition of the essential oil stored at -6oC for up to eight months was also
evaluated. Storage of powdered drug significantly reduced the essential oil content, which was not
observed for fragmented drug. The concentration of the major constituents of “carqueja” essential
oil, spathulenol and ledol, was not affected by the post-harvest treatment, although they presented
distinct variations, with ledol concentrations reducing and spathulenol concentrations increasing.
We found that fragmented drugs can be stored for up to 12 months and powdered at the moment
of extraction, without reducing the concentration of the essential oil or its chemical constituents.
Storage at -6oC for eight months caused quantitative variations in some minor constituents of the
essential oil such as a-guaiene, b-selinene, germacrene B and espathulenol.
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Baccharis, Asteraceae, Plantas medicinais, Óleo essencial, Pós-colheita, Medicinal plants, Essential oil, Ppost-harvest
Citação
SILVA, F. G. et al. Influência do processamento pós-colheita e armazenamento na composição química da droga vegetal e do óleo essencial de carqueja [Baccharis trimera (Less.) DC.]. Revista Brasileira de Plantas Medicinais, Botucatu, v. 12, n. 4, p. 436-442, 2010.