The versatile in situ gene expression of an Epsilonproteobacteria-dominated biofilm from a hydrothermal chimney.

Abstract:

:The Epsilonproteobacteria, including members of the genus Sulfurovum, are regarded as important primary producers in hydrothermal systems. However, their in situ gene expression in this habitat has so far not been investigated. We report a metatranscriptomic analysis of a Sulfurovum-dominated biofilm from one of the chimneys at the Loki's Castle hydrothermal system, located at the Arctic Mid Ocean Ridge. Transcripts involved in hydrogen oxidation, oxidation of sulfur species, aerobic respiration and denitrification were abundant and mostly assigned to Sulfurovum, indicating that members of this genus utilize multiple chemical energy sources simultaneously for primary production. Sulfurovum also seemed to have a diverse expression of transposases, potentially involved in horizontal gene transfer. Other transcripts were involved in CO₂ fixation by the reverse TCA cycle, the CRISPR-Cas system, heavy metal resistance, and sensing and responding to changing environmental conditions. Through pyrosequencing of PCR amplified 16S rRNA genes, the Sulfurovum-dominated biofilm was compared with another biofilm from the same chimney, revealing a large shift in the community structure of Epsilonproteobacteria-dominated biofilms over a few metres.

journal_name

Environ Microbiol Rep

authors

Dahle H,Roalkvam I,Thorseth IH,Pedersen RB,Steen IH

doi

10.1111/1758-2229.12016

subject

Has Abstract

pub_date

2013-04-01 00:00:00

pages

282-90

issue

2

issn

1758-2229

journal_volume

5

pub_type

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