Classificação Macroscópica, identificação da microbiota fúngica e produção de aflatoxinas em híbridos de milho

Dilkin, Paulo; Mallmann, Carlos Augusto; Santúrio, Jânio Morais; Hickmann, José Luis

doi:10.1590/s0103-84782000000100022

Cited by 14 publications

(11 citation statements)

References 6 publications

(4 reference statements)

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“…was the most abundant in corn samples in summer storage, which was verified by Dilkin et al (2000) and Marques et al (2009) high occurrence of Aspergillus sp. and aflatoxins in the corn samples in this study contradicted the hypothesis presented in previous research (Hirooka et al, 2007;Mohale et al, 2013;Rocha et al, 2009).…”

Section: Resultsmentioning

confidence: 66%

“…Aflatoxin B 2 was the most common and was detected in 12 samples, followed by G 2 and B 1 , which were detected in 5 and 2 samples, respectively. Dilkin, Mallman, Santurio and Hickmann (2000) stated that the toxicity of the group decreased in the order B 1 > G 1 > B 2 > G 2 , with toxicity proportions of 50, 20 and 10% in relation to B 1 , respectively. The contamination levels did not compromise the use of these grains as food in Brazil.…”

Section: Resultsmentioning

confidence: 99%

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Occurrence of Aspergillus sp., Fusarium sp., and aflatoxins in corn hybrids with different systems of storage

et al. 2016

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ABSTRACT. The aim of this study was to assess alternatives for viable corn storage for small rural properties in two annual storage experiments. A 4×5 factorial design was used with four types of storage (conventional bags, hermetic bags, metal silos and corncobs) and five periods of storage (0, 3, 6, 9 and 12 months). We used corn hybrids 2B688RR and 30K73Hx cultivated in winter 2012 and summer 2012/2013 in the city of Dois Vizinhos, Paraná, Brazil. The moisture contents, counts of Aspergillus sp. and Fusarium sp., and the occurrence of aflatoxins (B 1 , B 2 , G 1 and G 2 ) were assessed. The kernels stored in hermetic bags had lower moisture contents. Aspergillus sp. and Fusarium sp. were observed in 20.37 and 86.11% of winter storage samples, respectively, and in 83.3 and 91.6% of summer storage samples, respectively. The storage system and time of storage had no influence on the occurrence of Aspergillus sp. and aflatoxins in the winter crop samples. The corncobs from the summer crop samples had the lowest counts of Aspergillus sp. and did not have aflatoxins. We detected aflatoxins at concentrations of 2.8-14.5 and 3-197.5 μg kg -1 in the winter and summer crop samples, respectively.

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Section: Resultsmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Occurrence of Aspergillus sp., Fusarium sp., and aflatoxins in corn hybrids with different systems of storage

et al. 2016

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“…Five recently harvested corn hybrids produced in Rio Grande do Sul were examined in relation to macroscopic appearance, fungal contamination, AF production by Aspergillus parasiticus, NRRL 2999 and consumption of dry matter in fungal culture (24). The hybrids had macroscopic damage and showed fungal contamination by Penicillium spp.…”

Section: Mycological Surveys and Mycotoxin-producing Potentialmentioning

confidence: 99%

Mycotoxin research in Brazil: the last decade in review

Rodriguez–Amaya

Sabino

2002

Braz. J. Microbiol.

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The number of research papers (128 papers) on mycotoxins published by Brazilian researchers in 1991-2000 surpassed the total number (85 papers) published in the preceding three decades . Thirty percent of the papers surveyed mycotoxins in foods and feeds. AFs in peanut and peanut products continued to be alarming, and high incidence and levels of FBs in corn and corn products also appeared as a serious problem. Contamination with other toxins, such as ZEA, OTA and trichothecenes, was low. Occurrence of AFM 1 in milk and dairy products and patulin in apple juice needs to be verified as the results are somewhat diverging. Work on analytical methods, mycological examination and toxic effects constituted 16, 13 and 13%, respectively, of the published papers in the decade assessed. Attempts to find means of preventing/controlling fungal growth and mycotoxin production notably increased, making up 27% of the papers, including investigations on influencing factors (e.g. genotype resistance, water content/a w , relative humidity, temperature, presence of metals, type of soil, mite infestation) and antagonistic potential of other microorganisms against mycotoxin-producing fungi. Effects of plant extract, flavonoids, fungicides and other chemicals, storage bag material, adsorbents, cooking and processing of food were also studied. Thus, notwithstanding constraints on resources, Brazilian research responds to the needs of the country, reflects international concerns and recent developments in the area.

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“…Uma explicação plausível para essa contaminação seria que diferentes fatores influenciaram o crescimento de fungos toxigênicos e a produção de aflatoxinas, sendo eles: a umidade relativa do ar, a temperatura e o teor de água presentes nos grãos (Dilkin et al, 2000). Tabela 2.…”

Section: Resultsunclassified

Ocorrência de fungos e micotoxinas em grãos de milho em Jataí-GO

Reges

Jesus

Silva

et al. 2016

Rev. colomb. investig. agroindustriales

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O milho é um produto muito suscetível à contaminação por fungos muitas vezes, facilitada pelas condições de armazenagem dos grãos. Dessa forma, a qualidade sanitária das sementes pode ser comprometida devido ao ataque de patógenos que interferem em sua viabilidade. O trabalho teve como objetivo identificar, quantificar e avaliar a ocorrência de fungos, e verificar a incidência de micotoxinas (aflatoxina e zearalenona) em grãos de milho, na pós colheita. Foram coletadas 7 amostras de grãos de milho em propriedades na região do município de Jataí/GO. O experimento foi desenvolvido no laboratório da Universidade Estadual Goiás, Campus de Jataí-GO. O delineamento experimental utilizado foi em blocos ao acaso, por 7 tratamentos e cinco repetições. A etapa A da pesquisa foi a identificação de diferentes espécies fúngicas, foram analisadas as características macroscópicas e microscópicas. A etapa B do projeto foi a deteção de mitoxinas nos fungos encontrados. Em todas as amostras analisadas foram identificados os fungos Aspergillus flavus, Fusarium moniliforme, Fusarium roseum, e Penicillium sp. A presença do fungo aflatoxigênico e a produção de aflatoxinas foram encontradas em algumas amostras de grãos de milho que apresentaram níveis de contaminação acima do limite oficial (20 µg/ kg) permitido pelo Ministério da Saúde/Anvisa e o MAPA. Palavras-chave:Aflatoxinas, colheita, semente de milho, zearalenona.Corn is a product very susceptible to fungal contamination often facilitated by the grain storage conditions. Thus, the sanitary quality of seeds it may be compromised due to the attack of pathogens that interfere with their viability. The study aimed to identify, quantify and evaluate the occurrence of fungi, and check the incidence of mycotoxins (aflatoxin and zearalenone) in corn grain in post harvest. 7 were collected samples of corn grain in properties in the city of Jataí / GO region. The experiment was developed in the laboratory of Goiás State University, Campus of Jataí-GO. The experimental design was a randomized block for 7 treatments and five repetitions.Step A of the research was the identification of different fungal species, macroscopic and microscopic characteristics were analyzed. The B phase of the project was the mitoxinas detection in fungi found. In all samples the fungus were identified, Aspergillus flavus, Fusarium moniliforme, Fusarium roseum, e Penicillium sp. The presence of aflatoxigênico fungus and the production of aflatoxins were found in some samples of corn kernels that had contamination levels above the official limit (20 mg / kg) permitted by the Ministry of Health / ANVISA and MAPA.

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Classificação Macroscópica, identificação da microbiota fúngica e produção de aflatoxinas em híbridos de milho

Cited by 14 publications

References 6 publications

<b>Occurrence of <i>Aspergillus</i> sp., <i>Fusarium</i> sp., and aflatoxins in corn hybrids with different systems of storage

<b>Occurrence of <i>Aspergillus</i> sp., <i>Fusarium</i> sp., and aflatoxins in corn hybrids with different systems of storage

Mycotoxin research in Brazil: the last decade in review

Ocorrência de fungos e micotoxinas em grãos de milho em Jataí-GO

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