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    Phytochemical screening, antioxidant, and antimicrobial activities of the crude leaves’ extract from Ipomoea batatas (L.) Lam

    Márcia Thaís Pochapski1, Eliana Cristina Fosquiera2, Luís Antônio Esmerino3, Elizabete Brasil dos Santos2, Paulo Vitor Farago3, Fábio André Santos2, Francisco Carlos Groppo1★★ Corresponding author

    1. 1Department of Pharmacology, Anesthesiology and Therapeutics, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Departments of, Brazil.
    2. 2Dentistry and, Brazil.
    3. 3Phamarcy, Ponta Grossa State University, Ponta Grossa, Paraná, Brazil.

    CORRESPONDENCE

    Francisco Carlos Groppo

    Department of Pharmacology, Anesthesiology and Therapeutics, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Departments of, Brazil.

    fcgroppo@fop.unicamp.br

    Received: 17-07-2010; Revised: 15-08-2010.

    Volume 7, Issue 26 · pp. 165–170 · PUBLISHED 9 May 2011 · DOI: 10.4103/0973-1296.80682

    View on Pharmacogn. Mag. original site ↗

    ABSTRACT

    Background: Ipomoea batatas (L.) Lam., popularly known as sweet potato (SP), has played an important role as an energy and a phytochemical source in human nutrition and animal feeding. Ethnopharmacological data show that SP leaves have been effectively used in herbal medicine to treat inflammatory and/or infectious oral diseases in Brazil. The aim of this research was to evaluate the phytochemical, antioxidant, and antimicrobial activities of the crude leaves’ extract of SP leaves. Materials and Methods: The screening was performed for triterpenes/steroids, alkaloids, anthraquinones, coumarins, flavonoids, saponins, tannins, and phenolic acids. The color intensity or the precipitate formation was used as analytical responses to these tests. The total antioxidant capacity was evaluated by the phosphomolybdenum complex method. Antimicrobial activity was made by agar disk and agar well diffusion tests. Results: The phytochemical screening showed positive results for triterpenes/steroids, alkaloids, anthraquinones, coumarins, flavonoids, saponins, tannins, and phenolic acids. Total contents of 345.65, 328.44, and 662.02 mg were respectively obtained for alkaloids, anthraquinones, and phenolic compounds in 100 g of the dry sample. The total antioxidant capacity was 42.94% as compared to ascorbic acid. For antimicrobial studies, no concentration of the SP freeze dried extract was able to inhibit the growth of Streptococcus mutans, S. mitis, Staphylococcus aureus, and Candida albicans in both agar disk and agar well diffusion tests. Conclusions: SP leaves demonstrated the presence of secondary metabolites with potential biological activities. No antimicrobial activity was observed.

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      Pochapski, M. T., Fosquiera, E. C., Esmerino, L. A., Santos, E. B. D., Farago, P. V., Santos, F. A., & Groppo, F. C. (2011). Phytochemical screening, antioxidant, and antimicrobial activities of the crude leaves’ extract from Ipomoea batatas (L.) Lam. Pharmacognosy Magazine, 7(26), 165–170. https://doi.org/10.4103/0973-1296.80682