Ação Antimicrobiana de um Novo Quimiotipo do Óleo Essencial das Folhas de Piper aduncum

Um novo quimiotipo do óleo essencial de Piper aduncum

Resumo

The chemical composition of the essential oil from the leaves of Piper aduncum, a plant rich in dillapiol,
was determined and surprisingly did not indicate the presence of dillapiol, but α-macrocarpene (14.11%),
anisyl formate (14,04%) and cis-dihydroagarofuran (13.78%) as the main constituents, corresponding to
a new chemotype of the plant. The essential oil analyzed exhibited very low activity against the bacteria
evaluated, since results were above the minimum inhibitory concentration of MIC > 625 μg mL-1, which
may be related to the different chemical composition revealed in the species evaluated and the absence of
dillapiol. The results contribute significantly to the chemistry and occurrence of P. aduncum, considering
that previous reports revealed dillapiol as a chemical marker of the oil obtained from specimens in a region
close to our collection site. This suggests the presence of two chemotypes of the plant, P. aduncum, in
the same Atlantic Forest region, indicating that could be allopatric species.