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| Registros recuperados: 25 | |
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| Pimenta,R. S.; Silva,J. F. M.; Coelho,C. M.; Morais,P. B.; Rosa,C. A.; Corrêa Jr,A.. |
| Our investigation of integrated biological control (IBC) started with an assay testing activity of the predacious yeast Saccharomycopsis crataegensis UFMG-DC19.2 against Penicillium digitatum LCP 4354, a very aggressive fungus that causes postharvest decay in oranges. Under unfavourable environmental conditions, the yeast showed a high potential for control (39.9% disease severity reduction) of this fungus. This result was decisive for the next step, in which S. crataegensis was tested in association with sodium bicarbonate salt, a generally regarded as safe (GRAS) substance. The yeast was able to survive at different concentrations of the salt (1%, 2% and 5%), and continued to grow for a week at the wound site, remaining viable at high population for 14... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological control; Saccharomycopsis; Penicillium; Postharvest disease; Orange. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000200022 |
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| Varavallo,Maurilio Antonio; Queiroz,Marisa Vieira de; Lana,Taís Guimarães; Brito,Admilson Toscano Ribeiro de; Gonçalves,Daniel Bonoto; Araújo,Elza Fernandes de. |
| Protoplast fusion between complementary auxotrophic and morphological mutant strains of Penicillium griseoroseum and P. expansum was induced by polyethylene glycol and calcium ions (Ca2+). Fusant strains were obtained in minimal medium and a prototrophic strain, possibly diploid, was chosen for haplodization with the fungicide benomyl. Different recombinant strains were isolated and characterized for occurrence of auxotrophic mutations and pectinolytic enzyme production. The fusant prototrophic did not present higher pectinase production than the parental strains, but among 29 recombinants analyzed, four presented enhanced enzyme activities. The recombinant RGE27, which possesses the same auxotrophic and morphologic mutations as the P. griseoroseum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Protoplast fusion; Pectinases; Penicillium. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100011 |
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| Dhake,A.B.; Patil,M.B.. |
| The fungus Penicillium purpurogenum was found to produce intracellular ß-glucosidase. Maximum activity of ß-glucosidase was observed on sucrose. Various cultural parameters of cultivation of P. purpurogenum for production of ß-glucosidase were optimized. Maximum enzyme content was observed after 96 hours of cultivation at 30º;C. Addition of amino acids histidine and cysteine induced ß-glucosidase synthesis to certain extent. The optimum temperature and pH for ß-glucosidase activity was 50º;C and 5.5 respectively. ß-glucosidase of P.purpurogenum shows stability at pH 2 thus it could be an ideal enzyme for debittering in fruit juice and wine industries. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: SS-glucosidase; Penicillium. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000200013 |
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| Pimenta,Raphael S.; Silva,Francisco L.; Silva,Juliana F.M.; Morais,Paula B.; Braga,Danúbia T.; Rosa,Carlos A.; Corrêa Jr.,Ary. |
| In this study we evaluated the ability of Saccharomycopsis schoenii Nadson and Krassiln (UWO-PS 80-91) as biocontrol agent against plant pathogenic filamentous fungi P. expansum Link (UFMG 01-2002), P. italicum Wehmer (LCP 61.1199), and P. digitatum (Pers.: Fr.) (LCP 984263, LCP 68175 and LCP 4354). S. schoenii was able to reduce disease severity in oranges inoculated with all fungi. Among the phytopathogens, P. digitatum LCP4354 was the most virulent whereas P. digitatum LCP 68175 was the most susceptible to predation. The yeast was able to survive for 21 days on the fruit surface and did not produce lesions on oranges. Production of antagonistic substances by S. schoenii was not detected using standard techniques. Our results point to the potential use... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological control; Orange; Postharvest disease; Penicillium; Saccharomycopsis schoenii. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000100020 |
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| Garcia,Marcelo Valle; Moraes,Vivian Machado; Bernardi,Angélica Olivier; Oliveira,Maurício Schneider; Mallmann,Carlos Augusto; Boscardin,Jardel; Copetti,Marina Venturini. |
| ABSTRACT: In recent years, Brazil has encouraged the cultivation of pecans to meet both demands of domestic and international market of nuts. New genetic varieties of pecans have been selected in recent years, but available scientific information on the occurrence of fungi and aflatoxins in the international literature is out of date. Therefore, the present study aimed to quantify and identify fungal microbiota and the presence of aflatoxins in pecan nuts cultivated in southern Brazil. Fifty-two pecan nut lots (Barton variety) were obtained from producers from 19 cities of Rio Grande do Sul State and analyzed by direct plating in Agar Dichloran Glycerol 18% (DG18) and Aspergillus Flavus and Parasiticus Agar (AFPA), following incubation at 25 °C for 7... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspergillus; Penicillium; Mycotoxin; Rio Grande do Sul; Carya illinoinensis.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600752 |
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| Registros recuperados: 25 | |
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