Óleo essencial da parte aérea de Baccharis dracunculifolia: obtenção via arraste a vapor, caracterização química, atividade antimicrobiana e antioxidante

Abstract

Baccharis drancunculifolia is a dioecious shrub widely found in Brazil and in South American countries. Popularly known as “vassourinha” and “alecrim-do-campo”, it has been used in popular medicine for decades for providing relief in stomach and liver illnesses and anti-inflammatory effect. Focusing on the bioprospecting of native plants in the southwest region of Paraná, the present work aimed to obtain seasonal essential oil from the plant collected at the Federal Technological University of Paraná, campus Pato Branco, by the method of steam distillation, chemical characterization, analysis antioxidant and antimicrobial. As a result, oils related to the four seasons of the year were obtained, and in their chemical composition there was mostly the presence of oxygenated sesquiterpenes and, among them, the components Spathulenol and E- nerolidol, regardless of the season of collection. The samples referring to the spring and summer seasons showed significant antioxidant activity by the FRAP method, DPPH and ABTS radical capture. The same samples obtained showed growth inhibitory activity against L. monocytogenes, E. coli, S. epidermidis, S. gallinarum, B. cereus and S. typhimurium. The pure spring essential oil sample showed bactericidal activity against S. gallinarum and S. epidermidis.