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Journal of Food Security. 2019, 7(3), 63-71
DOI: 10.12691/JFS-7-3-1
Original Research

Prevention of Ochratoxin A (OTA) Production in Coffee Beans Using Natural Antifungal Derived from Solanum indicum L. Green Berries

Irène Ahou Kouadio1, , Louis Koffi Ban2 and Mireille Bretin Dosso3

1Laboratory of Biochemistry and Food Sciences, UFR Biosciences, University Felix Houphouet-Boigny, 22 BP 582 Abidjan 22, Côte d’Ivoire

2Agronomic National Research Centre, Abidjan, Côte d’Ivoire, 01 BP 1740 Abidjan 01, Cote d’Ivoire

3Pasteur Institute of Côte d’Ivoire, 01 BP 490 Abidjan 01, Cote d’Ivoire

Pub. Date: May 24, 2019
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Irène Ahou Kouadio, Louis Koffi Ban and Mireille Bretin Dosso. Prevention of Ochratoxin A (OTA) Production in Coffee Beans Using Natural Antifungal Derived from Solanum indicum L. Green Berries. Journal of Food Security. 2019; 7(3):63-71. doi: 10.12691/JFS-7-3-1

Abstract

This study was aimed to find out an alternative to synthetic fungicides used in the control of fungi development in crops including coffee. The antifungal was extracted from green berries of Solanum indicum L. and its effect on the behavior of three Aspergillus species Ochratoxin A (OTA) producers (Aspergillus niger, Aspergillus carbonarius and Aspergillus ochraceus) was evaluated on a coffee-agar medium. The results show a reduction of growth with the increase of the antifungal content in the medium. Indeed, on the medium without antifungal, the growth rate has reached 90 mm within only 3 days of incubation for the three strains tested, while no growth was observed for A. niger and A.carbonarius from 8% of antifungal in the medium and for A. ochraceus, at 10% of antifungal in the medium even after 7 days of incubation. However, the total inhibition of OTA was observed from 8% of antifungal in the medium for these three strains of Aspergillus. Indeed, the amounts of OTA produced on the coffee-agar medium without antifungal were 0.005, 1.63 and 0.108 µg/mL respectively for A. niger, A. carbonarius and A. ochraceus, while from 8% of antifungal fraction in the medium, no detectable OTA amount was observed for the three strains tested after 7 days of incubation. The phytochemical screening of this antifungal fraction revealed compounds including flavonoids, carotenoids and saponins. These results suggest the use of this antifungal fraction as an alternative to synthetic fungicides for the control of fungi development and OTA production in coffee beans.

Keywords

coffee beans, Solanum indicum L., green berries, Aspergillus, Ochratoxin A, antifungal

Copyright

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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