Siparuna guianensis Aubl. (Siparunaceae) is an aromatic medicinal plant native to South America. This study aimed to investigate the biomass and bioactivity of leaf extracts and essential oil of S. guianensis from savanna forests in Central Brazil, Tocantins State. Crude leaf extract and leaf essential oil were tested in different concentrations against bacteria and fungi. At concentrations equivalent to crude oil (380 µg ml-1), oil diluted to half (190 µg ml-1) and oil diluted to one quarter (95 µg ml-1), the oil inhibited bacterial growth of Staphylococcus aureus. This finding may be related to the major monoterpene and sesquiterpene, especially bisabolol and bisabolene, which have antibacterial properties. The extracts did not exhibit antimicrobial action. Under the natural conditions of the forest legal reserve, the estimated medicinal biomass was 3300 kg ha-1, with the leaf fraction corresponding to 38 kg ha-1 of crude extract and 5 L ha-1 of essential oil. It is an important reservoir of medicinal biomass foliar for prospective studies and popular use against antimicrobial which are of interest to health or agriculture.<br /><br />\t <br /><br />\tKey words: Siparuna guianensis, bioactivity, medicinal biomass, gas chromatography, Brazil, agroecology.
Nelita, G. ccedil alves F. de B., Mir eacute ia, A. B. P., Vany, F., Karine, Q. P., Alo iacute sio, F. C. J. uacute nior, & Artur, A. (2015). Antimicrobial activity and medicinal biomass of Siparuna guianensis in Brazilian Cerrado forest, a global hotspot. Journal of Medicinal Plants Research, 9(37), 968–980. https://doi.org/10.5897/jmpr2015.5884