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BIBTEX RIS

Habitat influence on antioxidant activity and tannin concentrations of Spondias tuberosa

2012; Taylor & Francis; Volume: 50; Issue: 6 Linguagem: Inglês

10.3109/13880209.2011.630673

1744-5116

Thiago Antônio de Sousa Araújo, Valérium Thijan Nobre de Almeida e Castro, Elba Lúcia Cavalcanti de Amorim, Ulysses Paulino Albuquerque,

Phytochemistry and Biological Activities

Context: Different habitat conditions can be responsible for the production of secondary metabolites and for the antioxidant properties of plant products.Objective: Thus, the aim of this study was to evaluate whether the antioxidant activity and tannin concentrations in the stem bark of Spondias tuberosa Arruda (Anacardiaceae) varied with collection site.Material and methods: The bark was collected from 25 individual trees, distributed in five different landscape units, as follows: agroforestry gardens, areas of pastures, maize cultivation areas, mountain areas and mountain bases, with the former 3 being considered as anthropogenic habitats, and the latter 2 considered as habitats with native coverage. The study was conducted in the rural area of the city of Altinho, Pernambuco State (Northeast Brazil). The DPPH (1,1-diphenyl-2-picrylhydrazyl) method was used to measure the antioxidant activity and tannin concentrations were evaluated by using the radial diffusion method.Results: The results demonstrated that there were no significant differences among the tannin concentrations of the individuals from the native (6.27% ± 1.75) or anthropogenic areas (4.63% ± 2.55), (H = 2.24; p > 0.05). In contrast, there were significant differences (H = 5.1723; p < 0.05) among the CE50 means of the antioxidant activities of the individuals from the native (32.10 µg/ml ± 5.27) and anthropogenic areas (27.07 µg/ml ± 2.29). However, correlations between the tannin concentrations and antioxidant activity of the extracts were not observed in the native (r = 0.39; p > 0.05) or in the anthropogenic areas (r = 0.38; p > 0.05).Discussion and conclusion: Because the variation of the antioxidant capacity of S. tuberosa bark was not accompanied by a variation in the tannin concentration, this property may be related to the presence of other metabolite(s).