Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus
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 ev...
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1989
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0301486X_v108_n1_p31_Dalcero http://hdl.handle.net/20.500.12110/paper_0301486X_v108_n1_p31_Dalcero |
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paper:paper_0301486X_v108_n1_p31_Dalcero2023-06-08T15:28:01Z Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus Varsavsky, Edith 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 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. Fil:Varsavsky, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1989 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0301486X_v108_n1_p31_Dalcero http://hdl.handle.net/20.500.12110/paper_0301486X_v108_n1_p31_Dalcero |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Varsavsky, Edith Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus |
| topic_facet |
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 |
| description |
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. |
| author |
Varsavsky, Edith |
| author_facet |
Varsavsky, Edith |
| author_sort |
Varsavsky, Edith |
| title |
Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus |
| title_short |
Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus |
| title_full |
Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus |
| title_fullStr |
Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus |
| title_full_unstemmed |
Aflatoxins in sunflower seeds: Influence of Alternaria alternata on aflatoxin production by Aspergillus parasiticus |
| title_sort |
aflatoxins in sunflower seeds: influence of alternaria alternata on aflatoxin production by aspergillus parasiticus |
| publishDate |
1989 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0301486X_v108_n1_p31_Dalcero http://hdl.handle.net/20.500.12110/paper_0301486X_v108_n1_p31_Dalcero |
| work_keys_str_mv |
AT varsavskyedith aflatoxinsinsunflowerseedsinfluenceofalternariaalternataonaflatoxinproductionbyaspergillusparasiticus |
| _version_ |
1768543845611470848 |