Publications

genotoxicity of plant extracts.	aqueous extracts of seven species used in brazilian popular medicine (achyrocline satureoides, iodina rhombifolia, desmodium incanum, baccharis anomala, tibouchina asperior, luehea divaricata, maytenus ilicifolia) were screened to the presence of mutagenic activity in the ames test (salmonella/microsome). positive results were obtained for a. satureoides, b. anomala and l. divaricata with microsomal activation. as shown elsewhere (vargas et al., 1990) the metabolites of a. satureoides extract al ...	1991	1842016
ethnopharmacological studies of antimicrobial remedies in the south of brazil.	this study reports the antimicrobial evaluation of the species most commonly used in rio grande do sul (rs), the southernmost state of brazil, for treating conditions likely to be associated with microorganisms. a four-stage process of documentation and evaluation was conducted: (a). review of rs ethnobotanical studies; (b). analysis of traditional uses; (c). literature survey on phytochemical and pharmacological data; (d). microbiological screening of selected plants. from the 149 species initi ...	2004	14698521
mutagenic potential and modulatory effects of the medicinal plant luehea divaricata (malvaceae) in somatic cells of drosophila melanogaster: smart/wing.	luehea divaricata is a native plant of the brazilian cerrado, known as "açoita-cavalo". it is used as a popular herbal medicine in the treatment of dysentery, bleeding, arthritis, tumors, ulcers, and gangrenous wounds. considering that herbal medicines sometimes provoke tumors and/or may prevent mutational events, it is important to study the action of these natural drugs on dna. aqueous extract of the bark of l. divaricata was evaluated at three different concentrations (0.10, 0.30, 0.50 mg/ml) ...	2011	21218382
evaluation of foliar fungal endophyte diversity and colonization of medicinal plant luehea divaricata (martius et zuccarini).	endophyte microorganisms are organisms that live inside plants without causing any apparent damage to their hosts. since all plants exhibit endophyte microorganisms, it is believed that mutual association is of great importance in nature. luehea divaricata (martius & zuccarini), known popularly in brazil as agoita-cavalo, is a big-sized tree with a wide distribution in the country that possesses medicinal qualities for: dysentery, leucorrhea, rheumatism, blennorrhoea, tumors, bronchitis, and dep ...	2011	21526263
in vitro antifungal evaluation and studies on mode of action of eight selected species from the argentine flora.	twenty nine extracts belonging to eight species of the argentine flora reported as antifungal in folk medicine, were assayed for antifungal properties by using the agar dilution method, against a panel of yeasts, filamentous fungi as well as dermatophytes. nine extracts belonging to six species, exhibited a broad spectrum of activity against microsporum cants, microsporum gypseum, trichophyton mentagrophytes, trichophyton rubrum and epidermophyton floccosum, with mics ranging from 25 to 900 μg/m ...	1998	23195989
chemical characterization of bioactive compounds from the endophytic fungus diaporthe helianthi isolated from luehea divaricata.	endophytic microorganisms, defined as fungi or bacteria that colonize the interior of plants without causing any immediate negative effects or damages, have reciprocal relationships with host plants. in some cases their presence is beneficial to the host due to the synthesis of bioactive compounds, among which several alcohols, esters, ketones and others that may react with other compounds and may be lethal to pathogenic microorganisms. diaporthe helianthi (phomopsis helianthi in its anamorphic ...	2012	24031942
molecular characterization by amplified ribosomal dna restriction analysis and antimicrobial potential of endophytic fungi isolated from luehea divaricata (malvaceae) against plant pathogenic fungi and pathogenic bacteria.	luehea divaricata is an important plant in popular medicine; it is used for its depurative, anti-inflammatory, and other therapeutic activities. we evaluated the antimicrobial activity of endophytic fungi isolated from leaves of l. divaricata against phytopathogens and pathogenic bacteria, and characterized the isolates based on amplified ribosomal dna restriction analysis (ardra). the in vitro antagonistic activity of these endophytes against the phytopathogen alternaria alternata was assayed b ...	2013	24301768
extracellular enzymatic profiles and taxonomic identification of endophytic fungi isolated from four plant species.	plants of medicinal and economic importance have been studied to investigate the presence of enzyme-producing endophytic fungi. the characterization of isolates with distinct enzyme production potential may identify suitable alternatives for specialized industry. at universidade estadual de maringá laboratory of microbial biotechnology, approximately 500 isolates of endophytic fungi have been studied over the last decade from various host plants, including medicinally and economically important ...	2016	27819729