Your browser doesn't support javascript.
loading
Starvation-induced stress resistance development in a genetically modified pseudomonas fluorescens strain
Guimaraes, Vanessa F; Rodrigues, Patrícia M; Hagler, Allen N; Mendonça-Hagler, Leda C. S; Elsas, Jan Dirk van.
Afiliação
  • Guimaraes, Vanessa F; Universidade Federal do Rio de Janeiro. Departamento de Microbiologia Geral.
  • Rodrigues, Patrícia M; Universidade Federal do Rio de Janeiro. Departamento de Microbiologia Geral.
  • Hagler, Allen N; Universidade Federal do Rio de Janeiro. Departamento de Microbiologia Geral.
  • Mendonça-Hagler, Leda C. S; Universidade Federal do Rio de Janeiro. Departamento de Microbiologia Geral.
  • Elsas, Jan Dirk van; Research Institute for Plant Protection.
Rev. microbiol ; 28(4): 245-51, out.-dez. 1997. tab, graf
Artigo em Inglês | LILACS | ID: lil-240689
Biblioteca responsável: BR32.1
ABSTRACT
The response of a genetically modified Pseudomonas flurescens to nutrient starvation and starvation-induced stress cross-protection were investigated. Strain BR12 was starved for carbon, nitrogen, phosphorus and sulphur individually and for all nutrients in defined mineral media and exposed for 6 h to chemical (ethanol 20 percentage), oxidative (H2O220µM), osmotic (NaCl3M), cold shock (0 degree) and heat shock (47 degree C) stresses at different incubationtimes. Response to starvation and stress cross-protection development were evaluated by viable bacteria counts. There was a significant increase in resistance of late phase cultures grown in rich medium to stress, except for ethanol, in all starvation situations. Multiple nutrient starved cultures were more resistant to stress than individual nutrient starved ones. This strain inoculated in oligotrophic stream water microcosms also showed the starvation-induced stress protection mechanism but it presented a higher resistance to ethanol than cultures starved in mineral media. the acquisition of nonspecific resistance to stress can favour the persistance of Genetically Modified Microorganisms (GMMos) in apparently unfavourable.
Assuntos
Buscar no Google
Coleções: Bases de dados internacionais Base de dados: LILACS Assunto principal: Estresse Fisiológico / Pseudomonas fluorescens / Engenharia Genética / Privação de Alimentos Idioma: Inglês Revista: Rev. microbiol Assunto da revista: Microbiologia Ano de publicação: 1997 Tipo de documento: Artigo
Buscar no Google
Coleções: Bases de dados internacionais Base de dados: LILACS Assunto principal: Estresse Fisiológico / Pseudomonas fluorescens / Engenharia Genética / Privação de Alimentos Idioma: Inglês Revista: Rev. microbiol Assunto da revista: Microbiologia Ano de publicação: 1997 Tipo de documento: Artigo
...