Data/hora: 01/06/2024 02:24:17

Provedor de dados: 	58	
País: 	Brazil	
Título: 	Co-metabolism of DDT by the newly isolated bacterium, Pseudoxanthomonas sp. wax	
Autores: 	Wang,Guangli; Zhang,Ji; Wang,Li; Liang,Bin; Chen,Kai; Li,Shunpeng; Jiang,Jiandong.	
Data: 	2010-06-01	
Ano: 	2010	
Palavras-chave: 	DDT; Co-metabolism; Bioremediation; Pseudoxanthomonas sp.	
Resumo: 	Microbial degradation of 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) is the most promising way to clean up DDT residues found in the environment. In this paper, a bacterium designated as wax, which was capable of co-metabolizing DDT with other carbon sources, was isolated from a long-term DDT-contaminated soil sample by an enrichment culture technique. The new isolate was identified as a member of the Pseudoxanthomonas sp., based on its morphological, physiological and biochemical properties, as well as by 16S rRNA gene analysis. In the presence of 100 mg l-1 glucose, the wax strain could degrade over 95% of the total DDT, at a concentration of 20 mg l-1, in 72 hours, and could degrade over 60% of the total DDT, at a concentration of 100 mg l-1, in 144 hours. The wax strain had the highest degradation efficiency among all of the documented DDT-degrading bacteria. The wax strain could efficiently degrade DDT at temperatures ranging from 20 to 37ºC, and with initial pH values ranging from 7 to 9. The bacterium could also simultaneously co-metabolize 1,1-dichloro-2,2-bis(p-chlorophenyl)ethane (DDD), 2,2-bis(p-chlorophenyl)-1,1-dichlorethylene (DDE), and other organochlorine compounds. The wax strain could also completely remove 20 mg kg-1 of DDT from both sterile and non-sterile soils in 20 days. This study demonstrates the significant potential use of Pseudoxanthomonas sp. wax for the bioremediation of DDT in the environment.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000200025	
Editor: 	Sociedade Brasileira de Microbiologia	
Relação: 	10.1590/S1517-83822010000200025	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Microbiology  v.41 n.2 2010	
Fonte: 	info:eu-repo/semantics/openAccess