Journal
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
Volume 75, Issue 21, Pages 6905-6909Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AEM.01124-09
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Funding
- JAMSTEC Multidisciplinary Research Promotion Award
- Academy of Finland [122394]
- Finnish Funding Agency for Technology and Innovation
- Osk Huttunen's Foundation
- Finnish Cultural Foundation
- [21780085]
- Academy of Finland (AKA) [122394, 122394] Funding Source: Academy of Finland (AKA)
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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.
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