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Use of wild yeasts as a biocontrol agent against toxigenic fungi and OTA production Agronomy
Souza, Mariana Lino; Passamani, Fabiana Reinis Franca; Ávila, Carla Luiza da Silva; Batista, Luis Roberto; Schwan, Rosane Freitas; Silva, Cristina Ferreira.
This study evaluated the antagonistic potential of 32 wild yeast isolates from coffee and cocoa bean fermentation. These yeasts were inoculated in co-cultivation with Aspergillus carbonarius (CCDCA 10608 and CCDCA 10408) and Aspergillus ochraceus (CCDCA 10612) isolated from grapes and coffee beans. The mycelial growth and ochratoxin A (OTA) production were evaluated, and the spores were counted after cultivation at 28°C for seven days. The yeasts presented higher inhibitory effects (53% in relation to the control) over the mycelial growth of the isolated A. ochraceus (CCDCA10612). Pichia anomala CCMA0148 and Saccharomyces cerevisiae CCMA0159 provided the greatest inhibition of the growth of all fungal strains. All Pichia species presented the highest...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.01.02.04-4 antagonistic activity; Ochratoxin A; Aspergillus; Inhibition; Pichia sp.; Saccharomyces sp Fitosanidade Microbiologia Agricola.
Ano: 2017 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32659
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Enzymatic and antagonistic potential of bacteria isolated from typical fruit of Cerrado in Minas Gerais State, Brazil Agronomy
Silva, Cristina Ferreira; Reis, Kelly Cristina; Lopes, Noelly Alves; Batista, Luis Roberto; Schawn, Rosane Freitas.
Brazil has great biodiversity, which is observed in the Cerrado biome of the tropical Brazilian savanna. The objectives of this study were to isolate and identify bacteria from Psychotria hoffmannseggiana with potential cellulase and pectinase production and with antagonistic activity against Aspergillus carbonarius, an Ochratoxin A (OTA) producer. Ripe fruit were collected in the region of Passos City in the preserved Cerrado area in Minas Gerais State, Brazil. Serial dilutions were performed, and the bacteria isolated were biochemically characterized and identified by sequencing. To analyze the production of enzymes, the bacteria were cultivated in CMC and pectinase media. The better enzyme producers were optimized for production. Assays on the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.01.02.04-4 microorganism; Psychotria hoffmannseggiana; Biotechnological application Microbiologia Agricola.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19057
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