Volume No. :   2

Issue No. :  5

Year :  2010

ISSN Print :  0975-4393

ISSN Online :  2349-2988


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Screening of aflatoxigenic property of some Aspergillus flavus isolated from sunflower seeds and its products at sunflower oil refineries



Address:   Narasimhan Banu1*, and John Paul Muthumary2
1Department of Biotechnology, Vels University, Pallavaram, Chennai – 600 117, Tamil Nadu, India
2Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai – 600 025, Tamil Nadu, India
*Corresponding Author:
DOI No:

ABSTRACT:
Aspergillus flavus has become the most widely reported food-borne fungus, reflecting its economic importance and relative ease of recognition as much as its ubiquity. It is especially abundant in the tropics, and it has a particular affinity for nuts and oilseeds as substrates, although the reason is not understood. It is the main source of aflatoxins, the most important mycotoxins in the world’s food supplies. It is not necessary that all A. flavus isolates are toxigenic. Some are non-aflatoxigenic. Their toxin producing capability and the amount of aflatoxin production will vary among the A. flavus isolates from various substrates of sunflower oil refinery. Fifty-seven different isolates of Aspergillus flavus were isolated from different samples viz., sunflower seeds, kernels, oil cake, de-oiled cake, raw oil and filtered oil of sunflower oil refineries namely, Nayan Proteins, Lakshmi industries, Raviprakash refinery and Tamil Nadu Agro Industries Corporation Limited. The isolates were grown in YES medium containing 20 % sucrose and 2 % yeast extract. Among these, 52 isolates were aflatoxigenic and produce only aflatoxin B1. The other 5 isolates were non-aflatoxigenic. But all the 57 isolates were not known to produce aflatoxin B2, aflatoxin G1 and aflatoxin G2. Presence of aflatoxins in food and feed and strong evidence of their association with human carcinogenesis, the problem of mycotoxins especially aflatoxigenic property of Aspergillus flavus from sunflower seeds and its products were regarded as worthy of investigation.
KEYWORDS:
Aflatoxigenic, aflatoxins, Aspergillus flavus, non-aflatoxigenic, sunflower seed
Cite:
Narasimhan Banu, John Paul Muthumary. Screening of aflatoxigenic property of some Aspergillus flavus isolated from sunflower seeds and its products at sunflower oil refineries. Research J. Science and Tech. 2010; 2(5): 102-107 .
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