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KMID : 0379119920200030252
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Korean Journal of Mycology
1992 Volume.20 No. 3 p.252 ~ p.258
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Studies on Mycoflora and Mycotoxins of Cowpea Cultivars
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Zohri, A. A.
Khayria, M./Gawad, A. El.
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Abstract
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Thirty three species and two species varieties belonging to 14 genera of fungi were collected from 20 cowpea cultivars on glucose Czapek´s agar (11 genera and 25 species+l var.) and glucose-Czapek´s agar supplemented with 10´% NaCl (7 genera and 18 species+2 var.) at 28±2℃. The total count of fungi were 6716 colonies/g in all owpea cultivars. On glucose-Czapek´s agar and identified; Aspergillus flavus, A. niger, A. sydowii, A. flavus var. columnaris, A. terreus, Penicillium chrysogenum, Emericella nidulans and Rhizopus stolonifer. The total count of halotolerant or halophilic fungi was 3515 colonies/g on 10% NaCl-glucose-Czapek´s agar and identified; the most common species were: A. flavus, A. sydowii, A. tamarii. A. flavipes, A. niger, A. flavus var. columnaris, A. ochraceus, A. oryzae and P. chrysogeausm. Thin layer chromatographic analysis of chloroform extracts of the different seed samples revealed that four cultivars were naturally contaminated with aflatoxins B₁, B₂, G₁, and G₂(45-112 ㎍/㎏).
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