Chemotaxonomic markers in essential oils of hypenia (Mart. ex Benth.) R. Harley
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Data
2012-10
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Resumo
Central Brazilian Cerrado is regarded as the center of origin and dispersion of Hypenia
(Lamiaceae: subtribe Hyptidineae) in South America. The genus has either remained undivided
or been divided into two or seven taxonomic sections, based almost exclusively on a limited range
of floral features. Interspecific chemical delimitation to complement analyses of botanical traits is
described. Multivariate analysis of essential oils of ten species in the vegetative stage supports the
taxonomic division in two sections. Cluster I included four species belonging to section Laxiflorae
in addition to H. irregularis, which were characterized by the highest percentages of spathulenol and
caryophyllene oxide. Cluster II contained five species belonging to section Densiflorae with
a-cadinol, a-muurolene and a-muurolol as major constituents. Cadinanes and germacranes/
aromadendranes seem to be chemotaxonomic markers of sections Densiflorae and Laxiflorae,
respectively. Furthermore, redundancy analysis revealed no significant correlation between edaphic
factors and oil chemovariations, suggesting that Hypenia oils consist of constitutive rather than
induced compounds.
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Palavras-chave
Hypenia, Essential oil, Chemical variability, Chemotaxonomy, Multivariate analysis
Citação
FARIA, Maria T. et al. Chemotaxonomic markers in essential oils of hypenia (Mart. ex Benth.) R. Harley. Journal of the Brazilian Chemical Society, Campinas, v. 23, n. 10, p. 1844-1852, Oct. 2012.