Seasonal variability of the essential oils of eugenia uniflora leaves
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Data
2009-06
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Resumo
Seasonal influence on the chemical composition of essential oils of Eugenia uniflora leaves with
red-orange fruit colour biotype has indicated the presence of two oil clusters in the two seasons of
the Brazilian Cerrado. Cluster I included samples collected during dry months (April-September)
which were characterized by the highest percentages of spathulenol (10%) and caryophyllene oxide
(4.1%). In cluster II, whose samples were collected during wet months (October-March), the major
constituent was selina-1,3,7(11)-trien-8-one epoxide (29%). The canonical correlation indicated
that spathulenol and caryophyllene oxide revealed a strong relationship with the phenolics and
nutrient balance (S, Ca, Fe) in leaves, whereas selina-1,3,7(11)-trien-8-one epoxide was related
to K, Cu, Mn, and precipitation during the months of the wet season. Oxygenated sesquiterpenes
were predominant in all the sampling months and the oil chemovariation observed might be
environmentally determined by a clear seasonal influence.
Descrição
Palavras-chave
Eugenia uniflora, Myrtaceae, Essential oil, Seasonal influence, Principal component analysis, Canonical correlation analysis
Citação
COSTA, Deomar. P. et al. Seasonal variability of the essential oils of eugenia uniflora leaves. Journal of the Brazilian Chemical Society, Campinas, v. 20, n. 7, p. 1287-1293, June 2009.