Home About us MoEF Contact us Sitemap Tamil Website  
About Envis
Whats New
Microorganisms
Research on Microbes
Database
Bibliography
Publications
Library
E-Resources
Microbiology Experts
Events
Online Submission
Access Statistics

Site Visitors

blog tracking


 
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
Vol. 75,No: 21, 2009, Pages: 6905–6909


Dehalogenation Activities and Distribution of Reductive Dehalogenase Homologous Genes in Marine Subsurface Sediments

Taiki Futagami,1,2 Yuki Morono,1 Takeshi Terada,3 Anna H. Kaksonen,4§ and Fumio Inagaki1*

Commonwealth Scientific and Industrial Research Organization (CSIRO), Land and Water, Underwood Ave., Floreat, WA
6014, Australia.

Abstract

Halogenated organic compounds serve as terminal electron acceptors for anaerobic respiration in a diverse range of microorganisms. Here, we report on the widespread distribution and diversity of reductive dehalogenase homologous (rdhA) genes in marine subsurface sediments. A total of 32 putative rdhA phylotypes were detected in sediments from the southeast Pacific off Peru, the eastern equatorial Pacific, the Juan de Fuca Ridge flank off Oregon, and the northwest Pacific off Japan, collected at a maximum depth of 358 m below the seafloor. In addition, significant dehalogenation activity involving 2,4,6-tribromophenol and trichloroethene was observed in sediment slurry from the Nankai Trough Forearc Basin. These results suggest that dehalorespiration
is an important energy-yielding pathway in the subseafloor microbial ecosystem.

Keywords: homologous (rdhA) genes, microorganisms, 2,4,6-tribromophenol, Chloroflexi,Dehalococcoides
ethenogenes
strain,Aplysina aerophoba,bioremediation.


Corresponding author: Tel 81-88-878-2204; Fax 81-88-878-2192.

E-mail: inagaki@jamstec.go.jp

 

 
Copyright © 2005 ENVIS Centre ! All rights reserved
This site is optimized for 1024 x 768 screen resolution