Journal of Food, Agriculture and Environment

Inhibitory effect of gamma radiation in degrading and preventing fungal toxins

Author(s):

Amira Hassan Abdullah Al-Abdalall

Recieved Date: 2014-04-16, Accepted Date: 2014-09-30

Abstract:

The aim was to study the effect of ionizing radiation on prevention of fungal growth and degradation of toxins in food materials. Ffungal strains (Aspergillus niger, A. alliaceus, A . melleus, A. flavus and Fusarium solani) used in this study were isolated from coffee beans. Fungi differed in their response to different doses of gamma radiation on a decline in the ability to produce biological active materials. Treatment with 3 kGy stopped production of these materials.  F. solani  did not lose completely the ability to produce these materials even when using a dose of 10 kGy. Boiling culture filtrates led to the blocking of active biological materials, or did reduce the inhibitory of bacterial growth. In all the fungi tested in liquid media and even in the control one, ochratoxin A did not appear, and when exposed to 10 kGy, the fungal cells  died and were not able to grow and produce mycotoxins. On the other hand, the ability to production of aflatoxin by F. solani was increased after treatment with 1 and 3 kGy and decreased thereafter.  Irradiation of culture filtrates with gamma rays may have significantly reduced the inhibitory activity of the growth of bacteria B. subtilis. The increase of inhibition was affected positively with the dose, and the effect was different with different fungal strains.

Keywords:

Aspergillus, ochratoxin, aflatoxin, gamma radiation, B. subtilis

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Journal: Journal of Food, Agriculture and Environment
Year: 2014
Volume: 12
Issue: 3&4
Category: Food and Health
Pages: 77-81

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