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| Ono,Elisabete Yurie Sataque; Biazon,Luciana; Silva,Marcelo da; Vizoni,Édio; Sugiura,Yoshitsugu; Ueno,Yoshio; Hirooka,Elisa Yoko. |
| Natural fungal and fumonisin contamination were evaluated in 109 freshly harvested corn samples from Paraná State and correlated to damaged kernels (%). In addition, healthy and damaged kernels of 24 corn samples were selected in order to compare the mycoflora profile and fumonisin levels. The correlation among protein/lipid content and fumonisin levels was also analyzed in the 15 most frequently cultivated corn hybrids. Total fungal colony count in 109 freshly harvested corn samples ranged from 1.9x10(4) to 3.5x10(6) CFU/g, Fusarium sp. count from 1.0x10³ to 2.2x10(6) CFU/g, and fumonisin levels from 0.13 to 20.38 µg/g. Total fungal colony/Fusarium sp. count and fumonisin levels showed positive correlation (p < 0.05). In addition, there was a positive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycoflora; Toxigenic fungi; Mycotoxins; Fumonisins; Corn quality. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000100008 |
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| Guimarães,Lucas Costa; Fernandes,Ana Paula; Chalfoun,Sara Maria; Batista,Luís Roberto. |
| Microorganisms are a source of many high-value compounds which are useful to every living being, such as humans, plants and animals. Since the process of isolating and improving a microorganism can be lengthy and expensive, preserving the obtained characteristic is of paramount importance, so the process does not need to be repeated. Fungi are eukaryotic, achlorophyllous, heterotrophic organisms, usually filamentous, absorb their food, can be either macro or microscopic, propagate themselves by means of spores and store glycogen as a source of storage. Fungi, while infesting food, may produce toxic substances such as mycotoxins. The great genetic diversity of the Kingdom Fungi renders the preservation of fungal cultures for many years relevant. Several... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycotoxins; Toxigenic fungi; Methods for fungal conservation. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100007 |
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| Miguel,Tatiana de Á.; Bordini,Jaqueline G.; Saito,Gervásio H.; Andrade,Célia G.T. de J.; Ono,Mario A.; Hirooka,Elisa Y.; Vizoni,Édio; Ono,Elisabete Y.S.. |
| The effect of fludioxonil + metalaxyl-M on the mycelial morphology, sporulation and fumonisin B1 production by Fusarium verticillioides 103 F was evaluated. Scanning electron microscopy analysis showed that the fungicide caused inhibition of hyphal growth and defects on hyphae morphology such as cell wall disruption, withered hyphae, and excessive septation. In addition, extracellular material around the hyphae was rarely observed in the presence of fludioxonil + metalaxyl-M. While promoting the reduction of mycelial growth, the fungicide increased sporulation of F. verticillioides compared to the control, and the highest production occurred on the 14th day in the treatments and on the 10th day in the control cultures. Fumonisin B1production in the culture... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Toxigenic fungi; Mycotoxin; Scanning electron microscopy; Electron micrographs; Extracellular material. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000100293 |
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| Costa,Léa Luzia Freitas; Scussel,Vildes Maria. |
| Toxigenic fungi were studied in beans (Phaseolus vulgaris L.) of Classes black and color, cultivated in different regions of the State of Santa Catarina, south region of Brazil. The mean counts of filamentous fungi were 2.8 x 103 and 6.7 x 103 CFU/g for beans Classes black and color, respectively. Penicillium spp., Aspergillus spp. and Phoma spp. were the most frequent genera isolated, followed by Ryzopus spp., Alternaria spp., Helminthosporium spp., Cladosporium spp., Botrytis spp., Fusarium spp., Trichoderma spp., Curvularia spp. and Dreschelera spp. Among beans Class black, 24.6% of the Aspergillus strains produced mycotoxins: 13.1% produced aflatoxins (AFs); 11.5% produced ochratoxin A (OTA) and 28.9% of Penicillium produced citrinin (CTR). On the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beans; Phaseolus; Toxigenic fungi; Aflatoxin; Ochratoxin A; Citrinin. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200008 |
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| Silva,Janaina Lara da; Aparecido,Christiane Ceriani; Hansen,Daiane; Pereira,Tacila Alves Muniz; Felicio,Joana D'arc; Gonçalez,Edlayne. |
| Some species of filamentous fungi that infest agricultural commodities are able to produce mycotoxins, contaminating feed and animal products. The aim of this research was to identify the mycoflora present in the feed and forage for dairy goat and to isolate and characterize the Aspergillus flavusand A. parasiticusstrains based on a morphological and molecular characterization and mycotoxigenic ability. The goat dairy diets were collected monthly from 11 goat milk farms, totaling 129 and 106 samples of concentrate and forage, respectively. For the isolation of the mycobiota the surface plating method was used. Aspergillus, Penicillium,and Fusariumwere the main fungi producing mycotoxins isolated. The morphological and molecular characterization and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Toxigenic fungi; Aflatoxin; Cyclopiazonic acid; Feed; Molecular characterization.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000801466 |
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| Calvet,Rodrigo Maciel; Pereira,Maria Marlúcia Gomes; Costa,Amilton Paulo Raposo; Torres,Adriana Mabel; Muratori,Maria Christina Sanches. |
| The objective of this study was to identify the toxigenic mycobiota and the occurrence of aflatoxins in shrimp feed products intended for shrimp cultivated in the coastal area of the state of Piauí, Brazil, in three farms ("A", "B" and "C"). The toxigenic capacity of the fungal species isolated was tested for aflatoxins (AF) and ochratoxin A production. The fungal counts of shrimp feed were similar for the "A" and "B" farms at all cultivation phases, collection sites, in closed and opened packages (1.33 to 2.66CFU g-1 log10 -1). The lowest fungal counts were found in feed from "C" farm (0.65CFU g-1 log10 -1) from closed packages. Thirty-four strains of Aspergillus were detected with a greater prevalence of A. flavus. Two strains produced B1, B2, G1 and G2... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Litopenaeus vannamei; Feed storage; Toxigenic fungi; Mycotoxins; Aflatoxin B1. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000601021 |
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