Integrated control of penicillium digitatum by the predacious yeast Saccharomycopsis crataegensis and sodium bicarbonate on oranges
Braz. j. microbiol
;
41(2): 404-410, Apr.-June 2010. ilus
Artigo
em Inglês
| LILACS
| ID: lil-545349
ABSTRACT
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 percent 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 percent, 2 percent and 5 percent), and continued to grow for a week at the wound site, remaining viable at high population for 14 days on the fruit surface. The yeast alone reduced the severity of decay by 41.7 percent and sodium bicarbonate alone reduced severity of decay by 19.8 percent, whereas the application of both led to a delay in the development of symptoms from 2 to 10 days. Ingredients of the formulations were not aggressive to fruits since no lesions were produced in control experiments.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Penicillium
/
Saccharomycopsis
/
Leveduras
/
Contaminação de Alimentos
/
Controle Biológico de Vetores
/
Citrus sinensis
/
Fermentação
Idioma:
Inglês
Revista:
Braz. j. microbiol
Assunto da revista:
Microbiologia
Ano de publicação:
2010
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Federal de Minas Gerais/BR
/
Universidade Federal do Tocantins/BR
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