Data/hora: 06/06/2024 05:32:21

Provedor de dados: 	58	
País: 	Brazil	
Título: 	Adaptive and cross-protective responses against cadmium and zinc toxicity in cadmium-resistant bacterium isolated from a zinc mine	
Autores: 	Prapagdee,Benjaphorn; Watcharamusik,Anchulee.	
Data: 	2009-12-01	
Ano: 	2009	
Palavras-chave: 	Bacterial responses; Cadmium; Zinc; Metal Resistance; Ralstonia sp.	
Resumo: 	Cadmium (Cd) is a major environmental hazard, which usually is detected in its ionic form of Cd2+. It also causes adverse toxic effects on human health and other living organisms. Cd-resistant bacteria were isolated from Cd-contaminated soils. One isolate, TAK1, was highly resistance level to Cd toxicity. TAK1 was isolated from soil contaminated with a high Cd concentration (204.1 mg.kg-1). The result of 16S rDNA sequence analysis found that the TAK1 showed the similarity to Ralstonia sp. Physiological adaptive and cross-protective responses to Cd and Zn killing were investigated in Ralstonia sp.TAK1. Exposure to a low concentration of Cd induced adaptive resistance to higher concentrations of Cd. In addition, pretreatment of Ralstonia sp.TAK1 with an inducing concentration of Cd conferred cross-protective response against subsequent exposure to the lethal concentrations of Zn. The induced adaptive and cross-protective response Ralstonia sp.TAK1 required newly synthesized protein(s). Cd-induced adaptive and cross-protective responses against Cd and Zn toxicity are the important mechanisms used by Ralstonia sp.TAK1 to survive in the heavy metal contaminated environments. These findings might lead to the use of Ralstonia sp.TAK1 for microbial based remediation in Cd and Zn-contaminated soils.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000400014	
Editor: 	Sociedade Brasileira de Microbiologia	
Relação: 	10.1590/S1517-83822009000400014	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Microbiology  v.40 n.4 2009	
Fonte: 	info:eu-repo/semantics/openAccess