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Survey of mycoflora and mycotoxins in Egyptian soybean seeds
Author(s) -
ElKady I. A.,
Youssef M. S.
Publication year - 1993
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.3620330602
Subject(s) - sterigmatocystin , biology , aflatoxin , mycotoxin , aspergillus flavus , penicillium , rhizopus , penicillium citrinum , botany , ochratoxin a , food science , fermentation
After four months in commercial storage, 100 soybean samples from different places of Egyptian Governorates were assayed for filamentous fungal growth at two incubation temperatures (28 and 45 °C). 73 species and 8 varieties belonging to 32 genera were isolated by the dilution plate method. At 28 °C, the common species were Aspergillus flavus, A. fumigatus, A. niger and A. alutaceus , followed by A. terreus, Penicillium chrysogenum, P. citrinum, Mucor hiemalis, M. racemosus, Emericella nidulans, Rhizopus stolonifer, Nectria haematococca and Scopulariopsis brevicaulis . At 45 °C, A. fumigatus was the dominant species followed by Rhizomucor pusillus, Emericella nidulans and Neosartorya fischeri. Penicillium which was one of the most abundant genus at 28 °C, absent at 45 °C. The seeds were assayed for aflatoxin, ochratoxin A, sterigmatocystin, T‐2 and zearalenone by thin layer chromatographic analysis. Aflatoxin was detected in 35% of soybean seed samples (5–35 μg/kg). The other mycotoxins were not detected.