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Journal of Biological Sciences
  Year: 2018 | Volume: 18 | Issue: 8 | Page No.: 488-499
DOI: 10.3923/jbs.2018.488.499
 
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Antifungal and Anti-mycotoxigenic Impact of Eco-Friendly Extracts of Wild Stevia

Shaaban Mostafa Abdel-Fattah, Ahmed Noah Badr , Ferial Abdel-Hamid Abu Seif, Safaa Mohamed Ali and Ramadan Ahmed Hassan

Abstract:
Background and Objectives: Plant extracts included several antioxidant molecules like phenolic, tocopherols, flavonoids and other active molecules. These compounds could have antimicrobial properties and could control mycotoxigenic fungi in foods and feeds, avert utilizing synthetic chemicals. This study aimed to evaluate several wild stevia extracts impact on toxigenic fungi and mycotoxins as food hazards. Materials and Methods: A plant of wild Stevia (WST) was extracted using three different methods. Extracts tested as antimycotic contra toxigenic fungi. Antibacterial activity against positive and negative gram bacteria assessed. Oxidative activity estimated by the spectrophotometer via two different assays. Phenolic and flavonoid molecules spectrophotometrically evaluated. Aflatoxins content and the reducing ratio evaluated using HPLC assay. Result statistically analyzed using analysis of variances (ANOVA one way SPSS.16). Results: The three extracts showed variation for inhibiting bacterial and fungal growth with antioxidant efficiency. Among the extracts, aqueous-ethanolic extract (1:1) recorded as the highest antimicrobial, antimycotic and antioxidant potency. The antioxidant activity of tested extracts was varying depending on extracting type. The concentration of 10 mg mL1 of WST ethanolic and aqueous-ethanolic extracts was more effective than their aqueous extract, in inhibition of fungal growth or aflatoxin production. The aqueous alcoholic extract was the most effective in aflatoxin degradation. Conclusion: While WST leaf showed promising antioxidant, antifungal and antibacterial activities. Extraction methods in present research were applied by the eco-friendly solvent system. These findings indicate the possible exploitation of this plant as modern food preservatives side to a good ability of the aqueous alcoholic extract to limit mycotoxin.
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How to cite this article:

Shaaban Mostafa Abdel-Fattah, Ahmed Noah Badr, Ferial Abdel-Hamid Abu Seif, Safaa Mohamed Ali and Ramadan Ahmed Hassan, 2018. Antifungal and Anti-mycotoxigenic Impact of Eco-Friendly Extracts of Wild Stevia. Journal of Biological Sciences, 18: 488-499.

DOI: 10.3923/jbs.2018.488.499

URL: https://scialert.net/abstract/?doi=jbs.2018.488.499

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