Isolation of four aquatic streptomycetes strains capable of growth on organochlorine pesticides.
Bioresour Technol
; 89(2): 133-8, 2003 Sep.
Article
en En
| MEDLINE
| ID: mdl-12699931
Ninety-three wild-type isolates identified as actinomycetes were tested against 11 organochlorine pesticides (OPs): aldrin, chlordane, DDD, DDE, DDT, dieldrin, heptachlor, and heptachlor epoxides, lindane, and methoxychlor. Qualitative screening agar assays displayed 62-78% tolerance of strains to OPs. Four strains designed M4, M7, M9 and M15 were selected based on multi-OP-tolerance, and identified as members of the streptomycetes group. Different growth profiles were observed in cultures of the four selected streptomycetes cultured in synthetic medium containing 5-50 microg x l(-1) aldrin or chlordane or lindane. Increase of aldrin removal by the selected microorganisms was concomitant with the 4.8-36.0 microg x l(-1) pesticide concentration range. After 72 h of streptomycete M7 growth in synthetic medium containing 48.0 microg x l(-1) aldrin, the remaining OP concentration in the supernatant was approximately 10% of the initial concentration. Also, in stationary growth phase less than 2.5 microg x l(-1) aldrin residual concentration was detected in the medium.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Streptomycetaceae
/
Purificación del Agua
/
Hidrocarburos Clorados
/
Insecticidas
Tipo de estudio:
Qualitative_research
Idioma:
En
Revista:
Bioresour Technol
Asunto de la revista:
ENGENHARIA BIOMEDICA
Año:
2003
Tipo del documento:
Article
País de afiliación:
Argentina
Pais de publicación:
Reino Unido