PROIMI   05436
PLANTA PILOTO DE PROCESOS INDUSTRIALES MICROBIOLOGICOS
Unidad Ejecutora - UE
artículos
Título:
Isolation of pesticide-degrading actinomycetes from a contaminated site: bacterial growth, removal and dechlorination of organochlorine pesticides.
Autor/es:
M.S. FUENTES; C.S. BENIMELI; S.A. CUOZZO; M.J. AMOROSO
Revista:
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Holanda; Año: 2009
ISSN:
0964-8305
Resumen:
Organochlorine pesticides are notorious, due to their high toxicity, persistence in the environment and their tendency to bioaccumulate. Their extensive use in the northwest of Argentina has left residues in the environment. Microbial degradation is an important process for pesticide bioremediation and actinomycetes have a great potential for that. The current study examined organochlorine pesticides in contaminated soil. Indigenous actinomycetes were isolated from the samples to evaluate bacterial growth as well as pesticide removal and release of chloride ions as a result of degradation. Most of the isolated microorganisms belonged to the Streptomyces genus, except one, which belonged to Micromonospora. Bacterial growth depended on the microorganism and the pesticide present. Highest growth and pesticide removal were observed with chlordane. Twelve out of 18 studied strains released chloride into culture supernatant with chlordane as carbon source, and percentages were higher than with lindane or methoxychlor. These results are supported by principal component analysis. It can be concluded that actinomycetes belonging to the Streptomyces and Micromonospora genera isolated from the contaminated site were able to grow in the presence of organochlorine pesticides and, to a certain extent, they were also able to degrade or remove these pesticides from the culture medium.