Multiple responses of gram-positive and gram-negative bacteria to mixture of hydrocarbons
Braz. j. microbiol
;
41(3): 649-667, Oct. 2010. ilus, graf, tab
Artigo
em Inglês
| LILACS
| ID: lil-549407
ABSTRACT
Most of our knowledge about pollutants and the way they are biodegraded in the environment has previously been shaped by laboratory studies using hydrocarbon-degrading bacterial strains isolated from polluted sites. In present study Gram-positive (Mycobacterium sp. IBB Po1, Oerskovia sp. IBB Po2, Corynebacterium sp. IBB Po3) and Gram-negative (Chryseomonas sp. IBB Po7, Pseudomonas sp. IBB Po10, Burkholderia sp. IBB Po12) bacteria, isolated from oily sludge, were found to be able to tolerate pure and mixture of saturated hydrocarbons, as well as pure and mixture of monoaromatic and polyaromatic hydrocarbons. Isolated Gram-negative bacteria were more tolerant to mixture of saturated (n-hexane, n-hexadecane, cyclohexane), monoaromatic (benzene, toluene, ethylbenzene) and polyaromatic (naphthalene, 2-methylnaphthalene, fluorene) hydrocarbons than Gram-positive bacteria. There were observed cellular and molecular modifications induced by mixture of saturated, monoaromatic and polyaromatic hydrocarbons to Gram-positive and Gram-negative bacteria. These modifications differ from one strain to another and even for the same bacterial strain, according to the nature of hydrophobic substrate.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Biodegradação Ambiental
/
Bactérias Gram-Negativas
/
Bactérias Gram-Positivas
/
Hidrocarbonetos
Idioma:
Inglês
Revista:
Braz. j. microbiol
Assunto da revista:
Microbiologia
Ano de publicação:
2010
Tipo de documento:
Artigo
País de afiliação:
Romênia
Instituição/País de afiliação:
Romanian Academy/RO
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