Impact of dissolved inorganic carbon concentrations and pH on growth of the chemolithoautotrophic epsilonproteobacterium Sulfurimonas gotlandica GD1T

Mammitzsch, Kerstin, Jost, Günter and Jürgens, Klaus (2014) Impact of dissolved inorganic carbon concentrations and pH on growth of the chemolithoautotrophic epsilonproteobacterium Sulfurimonas gotlandica GD1T MicrobiologyOpen, 3 (1). pp. 80-88. DOI 10.1002/mbo3.153.

[img]
Preview
Text
mbo3153.pdf - Published Version
Available under License Creative Commons Attribution.

Download (1037Kb) | Preview

Supplementary data:

Abstract

Epsilonproteobacteria have been found globally distributed in marine anoxic/sulfidic areas mediating relevant transformations within the sulfur and nitrogen cycles. In the Baltic Sea redox zones, chemoautotrophic epsilonproteobacteria mainly belong to the Sulfurimonas gotlandica GD17 cluster for which recently a representative strain, S. gotlandica GD1T, could be established as a model organism. In this study, the potential effects of changes in dissolved inorganic carbon (DIC) and pH on S. gotlandica GD1T were examined. Bacterial cell abundance within a broad range of DIC concentrations and pH values were monitored and substrate utilization was determined. The results showed that the DIC saturation concentration for achieving maximal cell numbers was already reached at 800 μmol L−1, which is well below in situ DIC levels. The pH optimum was between 6.6 and 8.0. Within a pH range of 6.6–7.1 there was no significant difference in substrate utilization; however, at lower pH values maximum cell abundance decreased sharply and cell-specific substrate consumption increased.

Document Type: Article
Keywords: Chemolithoautotrophy; DIC saturation; epsilonproteobacterium; ocean acidification; pelagic redox zones; pH; sulfurimonas
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.1002/mbo3.153
ISSN: 2045-8827
Projects: BIOACID
Date Deposited: 19 Jan 2015 08:06
Last Modified: 26 Oct 2016 08:40
URI: http://oceanrep.geomar.de/id/eprint/26985

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...