TY  - SER
AU  - Volpi, Gabriel Baraldi 
AU  - Rosa, Genesio Mario da 
AU  - Flach, Kauane Andressa 
AU  - Toebe , Marcos 
AU  - Bones, Ubiratan Alegransi 
AU  - Costa Junior, Jefferson Alves da 
TI  - Evaluation of the antibacterial potential of crude extracts and essential oils of three Baccharis species 
KW  - PLANTA MEDICINAL
KW  - GENÉTICA
KW  - ÓLEO ESSENCIAL
KW  - EXTRATO
KW  - BACCHARIS
N1  - Publicação on-line; 33 ref.; 5 tables; Summary (En)
N2  - 

ABSTRACT 

The purpose of this work was to analyze the antimicrobial potential of Baccharis trimera, B. gaudichaudiana and B. dracunculifolia, which were used to perform antibiogram tests, with Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and a wild microorganism isolated from soil, which was submitted to molecular identifi cation characterized as Bacillus cereus. The sensitivity or resistance of each microorganism subjected to hydroalcoholic extracts and essential oils of the three plants was analyzed, and the inhibition was quantitatively evaluated according to the halo formed around the disks of paper. Data were subjected to statistical evaluation using a completely randomized design, in a three-factor split-plot scheme and four replications. The results of the microorganism susceptibility tests allow us to infer that B. trimera (Less.) DC. has a greater inhibitory action in the essential oils. The two microorganisms with Gram-positive characteristic cell walls (B. cereus and S. aureus) suffered growth inhibition by the three species of Baccharis, both in essential oils and in extracts. In the case of Gram-negative (E. coli and P. aeruginosa) there was no growth inhibition at the concentrations of extracts and essential oils used. The microorganism B. cereus suffered a greater inhibitory infl uence from the species B. trimera and B. gaudichaudiana. Chemical analysis showed similarity of fi ve compounds in the tested species, namely caryophyllene; bicyclo[4.4.0]dec-1-ene, 2-isopropyl-5- methyl-9-methylene-; y-gurjunene; D-amorphene, and spathulenol. Some of these are already known in the literature due to their antibacterial capacity. The sum, in percentage, of these compounds for B. dracunculifolia, B. gaudichaudiana and B. trimera was 39.08, 31.45 and 37.15%, respectively.

 Keywords: Antibacterial potential, Genetic identifi cation, Medicinal plants, methodologies of extraction

UR  - https://www.sbpmed.org.br/admin/files/papers/file_Ss6sjaoE0Qn7.pdf
ER  -