Physicochemical properties and antimicrobial activity of Roselle (Hibiscus sabdariffa L.)
- 8 June 2013
- journal article
- research article
- Published by Wiley in Journal of the Science of Food and Agriculture
- Vol. 93 (15), 3769-3776
- https://doi.org/10.1002/jsfa.6256
Abstract
BACKGROUND The therapeutic action of a plant depends on its chemical constituents. In this study, experiments were carried out in order to evaluate the effect of extraction conditions on the antioxidative and antimicrobial activities of Roselle (Hibiscus sabdariffa L.). RESULTS Roselle was found to be rich in malic acid, anthocyanins, ascorbic acid and minerals, especially Ca and Fe, but low in glucose. More than 18 volatile compounds were identified by gas chromatography and gas chromatography–mass spectrometry. This herb, which is rich in phenolic compounds and displays DPPH radical scavenging activity, could be a good source of natural antioxidants. The antimicrobial activity of the Roselle water and ethanol extracts was tested with Bacillus subtilis (ATCC6633), Staphylococcus aureus (ATCC6538) and Escherichia coli (ATCC 8739). The inhibition of the Roselle ethanol extract against B. subtilis and S. aureus was slightly higher than that of water extract but this difference was not significant. However, E. coli was strongly inhibited by the Roselle water extract at concentrations of 25 and 50 mg mL−1 as determined by a paper disc method. CONCLUSION The obtained results indicated that antioxidant and antimicrobial activity was related to different methods of extraction and Roselle extracts could be a source of therapeutically useful products. © 2013 Society of Chemical IndustryKeywords
This publication has 35 references indexed in Scilit:
- Physicochemical and Phytochemical Properties of Cold and Hot Water Extraction from Hibiscus sabdariffaJournal of Food Science, 2011
- Changes in total phenolic and monomeric anthocyanin composition and antioxidant activity of three varieties of sorrel (Hibiscus sabdariffa) during maturityJournal of Food Composition and Analysis, 2009
- Concordance between antioxidant activities and flavonol contents in different extracts and fractions of Cuscuta chinensisFood Chemistry, 2007
- Methodical characterization of rice ( Oryza sativa ) bran oil from PakistanGrasas y Aceites, 2005
- Inhibition of intestinal motility by methanol extracts of Hibiscus sabdariffa L. (Malvaceae) in ratsPhytotherapy Research, 2002
- α-Amylase Inhibitors from Roselle (Hibiscus sabdariffaLinn.) TeaBioscience, Biotechnology, and Biochemistry, 2000
- Extraction, Analysis, and Study on the Volatiles in Roselle TeaJournal of Agricultural and Food Chemistry, 1998
- Analysis of the volatiles in the seed oil of Hibiscus sabdariffa (Malvaceae) by means of GC-MS and GC-FTIRJournal of Agricultural and Food Chemistry, 1992
- Biochemical dynamics and hypocholesterolemic action of Hibiscus sabdariffa (Karkade)Molecular Nutrition & Food Research, 1991
- Untersuchungen zu den Bindungsformen von Eisen, Kupfer und Zink in verschiedenen TeesortenZeitschrift für Lebensmittel-Untersuchung und Forschung, 1984