RESUMO:Pterodon emarginatus Vogel (Fabaceae) é uma árvore do Cerrado conhecida popularmente como "sucupira branca, faveiro, fava de sucupira e sucupira lisa" e utilizada na medicina popular em preparações anti-reumáticas, antiinflamatórias, analgésicas e antiinfecciosas. Esse trabalho teve por objetivo fazer a triagem fitoquímica do pó e avaliar a atividade antimicrobiana do extrato etanólico bruto das cascas da P. emarginatus contra bactérias Palavras-chave: plantas medicinais, CIM, bactériaABSTRACT: Evaluation of antimicrobial activity of crude ethanol extract from the bark of "sucupira branca" (Pterodon emarginatus Vogel) -Fabaceae. Pterodon emarginatus Vogel (Fabaceae) is a Cerrado tree popularly known as "sucupira branca", "faveiro", "fava de sucupira" and "sucupira lisa" and has been used in folk medicine as antirheumatic, anti-inflammatory, analgesic and anti-infective. The aim of this work was to perform the phytochemical screening of the powder and to evaluate the antimicrobial activity of crude ethanol extract from P. emarginatus barks against Gram-positive bacteria, Gram-negative bacteria and the fungus Candida albicans. The crude ethanol extract was obtained from desiccated and pulverized barks. Its minimum inhibitory concentration (MIC) was determined by using Steers inoculator. The phytochemical tests detected the presence of flavonoids, saponin heterosides, resins and traces of steroids and triterpenoids. Ethanol extract MICs were 0.18 mg mL -1 for the Gram-positive bacteria Rhodococcus equi ATCC 25923, Micrococcus luteus ATCC 9341 and Micrococcus roseus IPTSP/UFG, and for the Gramnegative bacteria Serratia marcescens ATCC 14756 and Pseudomonas aeruginosa ATCC 9027; 0.37 mg mL -1 for Enterobacter cloacae FT 505 LEMC/EPM/UFG; and 0.74 mg mL -1 for the remaining tested bacteria and for the fungus C. albicans. This study opens perspectives for the use of P. emarginatus barks as an antimicrobial drug.

RESUMO:Davilla elliptica St.-Hil. é empregada popularmente no tratamento de hemorróidas, diarréias e ferimentos. O propósito deste trabalho foi realizar o estudo farmacognóstico de folhas de D. elliptica de dois locais do Estado de Goiás. Cortes paradérmicos e transversais foram submetidos a técnicas usuais de microscopia óptica. As folhas de D. elliptica são hipoestomáticas, sendo os estômatos predominantemente paracíticos. Na epiderme observam-se tricomas unicelulares em ambas faces. O mesofi lo é isobilateral e apresenta idioblastos cristalíferos. O sistema vascular na nervura principal é constituído por três feixes vasculares, formando uma estrutura circular. No pecíolo o sistema vascular apresenta uma estrutura circular formada, provavelmente, pela união de vários feixes vasculares. O material pulverizado foi submetido a testes de prospecção fi toquímica, de pureza e quantitativo. Foi constatada a presença de taninos, cumarinas, resinas, fl avonóides, saponinas, esteróides e triterpenóides. Os teores de cinzas totais foram de 10,32% e 12,26%; os de cinzas insolúveis em ácido, 7,46% e 9,68%; e os de umidade, 9,92% e 9,50%. Os teores de fl avonóides totais foram de 1,20% e 1,48%, e os de taninos 9,89% e 13,96%. Devido ao número reduzido de amostras, não é possível afi rmar, através deste estudo, que o perfi l farmacognóstico de D. elliptica seja infl uenciado por fatores abióticos.Unitermos: Davilla elliptica, Dilleniaceae, lixeirinha, anatomia foliar, prospecção fi toquímica.ABSTRACT: "Pharmacognostic characterization of the leaves of Davilla elliptica St.-Hil. (Dilleniaceae)". Davilla elliptica St.-Hil. is popularly used in the treatment of hemorrhoid, diarrhea and wounds. The aim of this work was to characterize pharmacognosticaly two leaves samples of D. elliptica. Paradermal and transversal sections had been submitted the usual techniques of optical microscopy. The leaves of D. elliptica are hypostomatics, and the stomata predominantly paracytic. In both epidermis were observed unicellular non-glandular trichomes. The mesophyll is isolateral and shows idioblasts with crystals in raphide. The vascular system in the midrib is constituted by three vascular bundles, forming a circular structure. The petiole shows a circular structure probably formed by union of many vascular bundles localized in the central region. The powdered plant material was submitted to tests of phytochemical prospection, of purity and quantitative. There had been evidenced the presence of tannins, coumarins, resins, fl avonoids, saponins and steroids. The content of total ashes was of 10,32% and 12,26%, insoluble in acid of 7,46% and 9,68%; the humidity of 9,92% and 9,50%. The fl avonoids contents was of 1,20% and 1,48%; the tannins contents was of 9,89% and 13,96%. Because of the reduced number of samples, it was not possible to affi rm through this study that the pharmacognostic profi le de D. elliptica is infl uenced by abiotics factors.Keywords: Davilla elliptica, Dilleniaceae, lixeirinha, leaves anatomy, phytochemical prospection...