This study aimed to investigate the chemical composition, to establish the mean lethal dose (LD50) and to assess the potential mutagenic effects of hydroalcoholic extract of leaves and inflorescences of Erythrina mulungu Mart. ex Benth by using micronucleus test in bone marrow of mice. Phytochemical assays were carried out through preliminary reactions with color change and/or precipitate formation; the LD50 was obtained by intraperitoneal administration of three concentrations of the extracts, assessing the number of deaths after 48 hours, and the micronucleus test was done by the smear method, after exposure of animals to five days of treatment. Phytochemical results showed the presence of reducing sugars, phenols and tannins, proteins and amino acids, flavonoids, alkaloids, depsides, depsidones and coumarin derivatives in both organs; foaming and steroidal saponins and triterpenes in the leaves and cardiotonic and anthraquinonic glycosides and alkaloids in the inflorescences. Considering the LD50, the leaf was atoxic and the inflorescence was moderately toxic. As regards the micronucleus test, results indicated absence of cytotoxicity while genotoxicity was dose-dependent for leaves and dose-independent for inflorescences. Thus, these results suggest that the plant, under the tested conditions, has the potential to induce damages to the DNA.
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