Mycotoxin production in wheat grains by different Aspergilli in relation to different relative humidities and storage periods

Wiley - Tập 47 Số 1 - Trang 6-10 - 2003
M. M. Atalla1, Naziha M. Hassanein2, Ahmed A. El‐Beih3, Youssef A. Youssef2
1Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Cairo, Egypt. [email protected]
2Microbiology Department, Faculty of Science, Ain-Shams University, Abbasia, Cairo, Egypt
3Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Cairo, Egypt; Fax: +202–3370931

Tóm tắt

Abstract

Four different Aspergilli (Aspergillus oryzae, A. parasiticus, A. terreus and A. versicolor) were grown on wheat grains under different degrees of relative humidity 14, 50, 74, 80 and 90%. Samples of wheat grains were taken monthly for a period of six months and examined for mycotoxin production. A. oryzae was found to produce aflatoxins B1, B2, zearalenone, DON and T‐2 toxins under elevated degrees of humidity and prolonged periods of storage. A. parasiticus produced aflatoxins B1, G1, NIV, DON and T‐2 toxins in high concentrations during a period of not more than three months storage at 14% relative humidity; at an increased level of relative humidity of 74% ochratoxin A, zearalenone and sterigmatocystin were also produced at high levels. The isolate was drastic in toxin production. A. terreus produced toxins at 14% relative humidity (aflatoxin G2 and DON) at levels much higher than any other prevalent degrees of humidity. A. versicolor is highly sensitive to relative humidity and grain moisture content. It produced aflatoxins B1, G1, NIV and DON at a relative humidity of 50% and another toxins (aflatoxin G2, ochratoxins A, B and zearalenone) at 74%. The microorganism can be considered a trichothecene producer under suitable relative humidity.

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Tài liệu tham khảo

10.1080/17450399009428413

10.1080/02652039009373927

Atalla M. M. PhD Thesis Faculty of Agriculture Cairo University Cairo Egypt1978.

Bacon C. W. Sweeney J. G. Robbins J. D. Durdick D. Appl Microbiol.1973 155–160.

10.1094/Phyto-64-17

Botton B., 1985, Moisissures utiles et nuisbles importance industrielle

Christensen C. M. in:Mycotoxins in Food Stuffs Proceedings of a symposium of Massachusetts Institute of Technology Boston MA1964 pp.9–17.

Detroy R. W., 1971, Microbial Toxins, 3

Diener U. L., 1966, Phytopathology, 56, 1390

El‐Kady I. A., 1990, Egypt. J. Bot., 33, 153

10.1021/jf60212a016

FAO Agriculture Development Paper No. 35 on “Mycotoxins in Food Stuffs” 1975.

Gilman G. C., 1956, A Manual of Soil Fungi

Helrich K., 1990, Official Methods of Analysis of the Association of Official Analytical Chemists

10.1016/S0021-9673(00)82181-0

10.1007/BF02050163

10.1016/0021-9673(91)80113-U

Luo Y., 1990, Appl. Environ. Microbiol., 56, 3723, 10.1128/aem.56.12.3723-3726.1990

10.1021/jf00094a019

Pitt J. L., 1985, Fungi and Food Spoilage

Rabie G. H. PhD Thesis Zagazig University 1990.

Rambo G., 1975, Cereal Chem., 52, 757

Samson R. A., 1981, Introduction to Food‐Borne Fungi, Centralbureau Voor Schimmelcultures

Stoloff L., 1971, J. AOAC, 54, 91, 10.1093/jaoac/54.1.91

10.1007/BF01128740

Trenk H. L. Hartman P. A. Appl. Microbiol.1970 781–784.

Varga J., 1996, Appl. Environm. Microbiol., 62, 4461, 10.1128/aem.62.12.4461-4464.1996

Wilson D. M. Huang L. H. Jay E. Appl. Microbiol.1975 592–595.

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Wiley

Tập 47 Số 1

6-10

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