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Abstract:

The aim of the present work was to determine the influence of Alternaria alternata upon aflatoxin production by Aspergillus parasiticus. A mixture of spores of both strains was inoculated in sunflower seeds at 0,90 aw, and incubated for 42 days at 28 °C ±1. The cultures were observed and analyzed every 7 days to determine the infection level of the seeds and the production of aflatoxins. Results showed that when the seeds were inoculated only with Aspergillus parasiticus, 100% were infected from the 7th day. When Aspergillus parasiticus and Alternaria alternata were simultaneously inoculated the infection level of the seeds was 100% for Aspergillus parasiticus following 7 days of inoculation and 0% for Alternaria alternata. After the 14th day of inoculation there was no significant difference in the infection percentage of both strains (approximately 80% of each one). As far as toxin production is concerned a remarkable decrease was observed when seeds were inoculated with both strains simultaneously. In accordance to the results, Alternaria alternata would not compete with Aspergillus parasiticus in colonization of seeds but would either degrade the aflatoxins by Aspergillus parasiticus or compete for aflatoxin biosynthesis precursors. Alternaria alternata could also secrete some substance that specifically inhibits aflatoxin synthesis. © 1989 Kluwer Academic Publishers.

Registro:

Documento: Artículo
Título:Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus
Autor:Dalcero, A.; Chulze, S.; Etcheverry, M.; Farnochi, C.; Varsavsky, E.
Filiación:National Institute of Pharmacology and Bromatogy, Buenos Aires, Argentina
Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, rutas 8 y 36 km 603, Río Cuarto, Córdoba, 5800, Argentina
Palabras clave:aflatoxin; Alternaria; alternariol; alternariol monomethyl ether; Aspergillus parasiticus; interaction of microorganisms; sunflower seeds; aflatoxin; alternaria alternata; aspergillus parasiticus; fungus; higher plant; nonhuman; plant; plant seed; sunflower; Aflatoxins; Alternaria; Aspergillus; Helianthus; Mitosporic Fungi; Seeds; Support, Non-U.S. Gov't
Año:1989
Volumen:108
Número:1
Página de inicio:31
Página de fin:35
DOI: http://dx.doi.org/10.1007/BF00436781
Título revista:Mycopathologia
Título revista abreviado:Mycopathologia
ISSN:0301486X
CODEN:MYCPA
CAS:aflatoxin, 1402-68-2; Aflatoxins
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0301486X_v108_n1_p31_Dalcero

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Citas:

---------- APA ----------
Dalcero, A., Chulze, S., Etcheverry, M., Farnochi, C. & Varsavsky, E. (1989) . Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus. Mycopathologia, 108(1), 31-35.
http://dx.doi.org/10.1007/BF00436781
---------- CHICAGO ----------
Dalcero, A., Chulze, S., Etcheverry, M., Farnochi, C., Varsavsky, E. "Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus" . Mycopathologia 108, no. 1 (1989) : 31-35.
http://dx.doi.org/10.1007/BF00436781
---------- MLA ----------
Dalcero, A., Chulze, S., Etcheverry, M., Farnochi, C., Varsavsky, E. "Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus" . Mycopathologia, vol. 108, no. 1, 1989, pp. 31-35.
http://dx.doi.org/10.1007/BF00436781
---------- VANCOUVER ----------
Dalcero, A., Chulze, S., Etcheverry, M., Farnochi, C., Varsavsky, E. Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus. Mycopathologia. 1989;108(1):31-35.
http://dx.doi.org/10.1007/BF00436781