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Effects of varied substrates on aflatoxin production by A. parasiticus
Author(s) -
Farag R. S.,
ElLeithy M. A.,
Basyony A. E.,
Daw Z. Y.
Publication year - 1986
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02673791
Subject(s) - aflatoxin , mycotoxin , aspergillus parasiticus , food science , polyunsaturated fatty acid , sterilization (economics) , toxicity , chemistry , biology , fungus , fatty acid , botany , biochemistry , organic chemistry , monetary economics , economics , foreign exchange market , foreign exchange
Sterilized and nonsterilized wheat kernels, soybean seeds, sesame seeds, peanut and faba bean were infected by A. parasiticus . The chemical composition, aflatoxin content and fatty acid patterns of the seeds were determined. The aflatoxins B 1 , B 2 , G 1 and G 2 were detected, and the amounts of the unsaturated toxins (B 1 and G 1 ) were greater than the respective dihydro derivatives (B 2 and G 2 ). Sterilized seeds infected by the fungus contained greater amounts of aflatoxins than those infected without previous sterilization. the highest and lowest toxicity indices were recorded for sterilized wheat and soybeans, respectively. Sesame, peanut and soybean exhibited intermediate toxicity indices. The toxicity of the aflatoxins produced was related significantly in every instance to the carbohydrate and lipid:protein ratio, and not to the polyunsaturated fatty acids of the seeds.