ISSN 2415-1297 (Online)   ISSN 2415-1300 (Print)
 
             
 
Volume : 27 Issue : 3 Year : 2019
 
Studies on The Fungus Flora and Aflatoxin Production of Cotton Seeds in Egypt [Med J Islamic World Acad Sci]
Med J Islamic World Acad Sci. 1991; 4(2): 141-145

Studies on The Fungus Flora and Aflatoxin Production of Cotton Seeds in Egypt

M. A. El-Naghy, M. B. Mazen, E. M. Fadl-Allah
From Department of Botany, Faculty of Science, El-Minya University and Assiut University, Egypt.

Eleven genera and 31 species in addition to 2 species varieties were isolated from stored cotton seeds collected from different localities in Egypt. The most common species encountered on 2% glucose-Czapek's agar at 28C using the dilution and the seed plate methods were: Aspergillus niger, A. flavus, A. terreus, A. tamarii, Mucor racemosus and Rhizopus stolonifer. On 2% cellulose-Czapek's agar, A. niger, A. flavus, A. terreus, A. fumigatus, A. zonatus, Mucor racemosus and Rhizopus stolonifer were more frequently encountered. Screening of fungal species and strains isolated for aflatoxin production by the fluorescence technique revealed that, only two strains of A. flavus, two strains of A. oryzae and one strain of A. fumigatus were positive for aflatoxin production. Only aflatoxin B2 was produced by A. flavus and the optimal conditions for toxin production on synthetic agar medium is described.

Keywords: Aflatoxin B2, cotton seed borne fungi, glucose or cellulose Czapek's agar media.


M. A. El-Naghy, M. B. Mazen, E. M. Fadl-Allah. Studies on The Fungus Flora and Aflatoxin Production of Cotton Seeds in Egypt. Med J Islamic World Acad Sci. 1991; 4(2): 141-145

Corresponding Author: M. B. Mazen, Egypt


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