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Effects of iron limitation on growth and carbon metabolism in oceanic and coastal heterotrophic bacteria
Citation
Fourquez, M and Devez, A and Schaumann, A and Gueneugues, A and Jouenne, T and Obernosterer, I and Blain, S, Effects of iron limitation on growth and carbon metabolism in oceanic and coastal heterotrophic bacteria, Limnology and Oceanography, 59, (2) pp. 349-360. ISSN 0024-3590 (2014) [Refereed Article]
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Copyright Statement
Copyright 2014 by the Association for the Sciences of Limnology and Oceanography Inc.
DOI: doi:10.4319/lo.2014.59.2.0349
Abstract
We investigated the metabolic response to iron (Fe) limitation of two bacterial strains of Alteromonas
macleodii, isolated from a coastal and an oceanic marine environment. Bacteria were grown under Fe-limited and
Fe-replete conditions, and comparative analyses of cellular properties and total proteomes were conducted.
Respiration was reduced by a factor of two in both strains, but the growth rate of the oceanic strain was less
affected by Fe limitation (reduced by 1.2-fold) than the coastal strain (reduced by 2-fold). Fe limitation led to
significant changes in the expression of several key enzymes associated with carbon catabolism, specifically those
involved in the citric acid cycle, glycolysis, and oxidative phosphorylation. The strain-specific overall responses to
Fe limitation were in part reflected in different metabolic strategies of the carbon metabolism and energy
acquisition. Our study provides novel insights on how Fe limitation can affect bacterial heterotrophic metabolism,
and how this could influence the coupling of the Fe and carbon cycles in the ocean.
Item Details
Item Type: | Refereed Article |
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Keywords: | iron limitation, marine bacteria, proteomics |
Research Division: | Earth Sciences |
Research Group: | Oceanography |
Research Field: | Biological oceanography |
Objective Division: | Environmental Management |
Objective Group: | Marine systems and management |
Objective Field: | Oceanic processes (excl. in the Antarctic and Southern Ocean) |
UTAS Author: | Fourquez, M (Dr Marion Fourquez) |
ID Code: | 91586 |
Year Published: | 2014 |
Web of Science® Times Cited: | 25 |
Deposited By: | IMAS Research and Education Centre |
Deposited On: | 2014-05-22 |
Last Modified: | 2015-03-04 |
Downloads: | 2 View Download Statistics |
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