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

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          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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          Most cited references43

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          Phytochemical Methods

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            Biological and phytochemical screening of plants.

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              Chemical composition, physical properties, and antioxidant activities of yam flours as affected by different drying methods

              C. Hsu (2003)
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                Author and article information

                Journal
                Pharmacogn Mag
                PM
                Pharmacognosy Magazine
                Medknow Publications (India )
                0973-1296
                0976-4062
                Apr-Jun 2011
                : 7
                : 26
                : 165-170
                Affiliations
                Department of Pharmacology, Anesthesiology and Therapeutics, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
                [1 ] Department of Dentistry, Ponta Grossa State University, Ponta Grossa, Paraná, Brazil
                [2 ] Department of Phamarcy, Ponta Grossa State University, Ponta Grossa, Paraná, Brazil
                Author notes
                Address for correspondence: Dr. Francisco Carlos Groppo, Piracicaba Dental School, University of Campinas - FOP/UNICAMP, Av. Limeira 901, CEP 13414-903, Piracicaba, SP, Brazil. E-mail: fcgroppo@ 123456fop.unicamp.br
                Article
                PM-7-165
                10.4103/0973-1296.80682
                3113358
                21716926
                86a1c1d5-ecf6-4d01-a7aa-ffb77d27937c
                © Pharmacognosy Magazine

                This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                : 17 July 2010
                : 15 August 2010
                : 09 May 2011
                Categories
                Short Communication

                Pharmacology & Pharmaceutical medicine
                sweet potato,phenolic content,antioxidant activity,convolvulaceae,antimicrobial activity

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