Resumen

LEON-FERNANDEZ, A. E. et al. Antibacterial, antifungal, antioxidant and toxic effect of fractioned extracts from Soursop pulp. Revista bio ciencias [online]. 2019, vol.6, e400.  Epub 02-Oct-2020. ISSN 2007-3380.  https://doi.org/10.15741/revbio.06.e400.

In this study was evaluated the antibacterial (Enterobacter aerogenes, Salmonella Typhimurium, Bacillus subtilis and Enterococcus faecalis), antifungal (Colletotrichum gloeosporioides and Rhizopus stolonifer), toxic and antioxidant activities of 15 fractionated extracts from three fractions (F1, F2 and F3) of the samples: fresh pulp, pulp stored for 3, 6 and 12 months at -20 ºC and heat-treated pulp (70 ºC, 30 min) of soursop (Annona muricata L.). F3 fractions of all treatments were more effective as antibacterial, antifungal and antioxidant. The F3 fraction from fresh pulp had the most antibacterial activity against Enterobacter aerogenes and Salmonella Typhimurium (18 and 20 mm of inhibitory halo, respectively); likewise, against Colletotrichum gloeosporioides and Rhizopus stolonifer with 59 % and 38 % of inhibition and also it presented the highest antioxidant activity. In contrast, the highest toxicity (2.60-2.84 µg/mL) was found in F1 fractions from fresh pulp and pulp stored at -20 ºC for 3 months. In conclusion, the extracts from soursop pulp may be an alternative for the development of antibacterial organic products, as pre-treatment for biological control of postharvest diseases and they can be studied, by their high toxicity from the pharmaceutic point of view.

Palabras llave : Annona muricata L; biological activities; extracts; soursop fruit.

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