Inhibition of Aflatoxin B1 Production by Aspergillus parasiticus Using Nonaflatoxigenic Strains: Role of Vegetative Compatibility |
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| Institution: | 1. Department of Food Science and Biotechnology, Kangwon National University, Chuncheon 200-701, Republic of Korea;2. S-Food Guardians Co. Ltd, Seoul 136-701, Republic of Korea;3. Food Additives and Packages Division, Ministry of Food and Drug Safety, Osong 363-951, Republic of Korea;1. University of Avignon, INRA, UMR408 SQPOV, 84000 Avignon, France;2. University of Avignon, UMR5247 CBSA, 84000 Avignon, France;1. Department of Biological Sciences, College of Natural and Applied Sciences, Crescent University, Abeokuta, Ogun State, Nigeria;2. Department of Biotechnology, BNCET, Lucknow, UP, India;3. Department of Civil Engineering, Institute of Engineering and Technology, Sitapur Road, Lucknow 226021, India;1. Instituto Federal Baiano, R. Glicério Taváres, S/n - Bate-quente, Valença, BA, Brazil;2. Universidade Federal do Recôncavo da Bahia, R. Rui Barbosa, 710, Cruz das Almas, BA, Brazil;3. Metabolomics Research Group, Departamento de Química Orgânica, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo S/n, 40170-115, Salvador, Brazil;4. Department of Plant Pathology, Universidade Federal de Lavras Lavras, MG, 37200-000, Brazil;5. Universidade Federal da Bahia, Instituto de Ciências da Saúde, Vale do Canela, Salvador, BA, Brazil |
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| Abstract: | The effect of vegetative compatibility on the inhibition of aflatoxin B1 production by Aspergillus parasiticus was examined using nonaflatoxigenic strains. Nonaflatoxigenic white-conidial mutants were paired in different proportions on an agar medium with aflatoxigenic yellow-conidial mutants belonging to the same isolate, to the same vegetative compatibility group but with the original wild types differing in phenotype, and to different vegetative compatibility groups. Heterokaryosis as a result of hyphal anastomosis was detected by the presence of conidiogenous structures with a mixture of green and parental (white and/or yellow) chains of conidia. Sclerotium production (number and dry weight) was significantly greater in pairings of compatible strains that formed heterokaryons than in pairings of strains from different vegetative compatibility groups. In contrast, there were no consistent differences in aflatoxin B1 inhibition by nonaflatoxigenic strains in pairings from the same vegetative compatibility group and pairings from different groups. Therefore, the composition of vegetative compatibility groups within a population may be of minor importance in predicting the efficacy of a particular nonaflatoxigenic strain for the biological control of aflatoxin contamination of crops. |
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