ReviewLife (Basel, Switzerland)2016
Probing Saltern Brines with an Oxygen Electrode: What Can We Learn about the Community Metabolism in Hypersaline Systems?
Review in Life (Basel, Switzerland), 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Molecular adaptations specific to extreme halophilic archaea could promote high perchlorate tolerance.Applied and environmental microbiology · 2025Article
- Light cues drive community-wide transcriptional shifts in the hypersaline South Bay Salt Works.Communications biology · 2025Article
- Endophytic bacteria with allelopathic potential regulate gene expression and metabolite production in hostFrontiers in plant science · 2024Article
- Analysis of the external signals driving the transcriptional regulation of the main genes involved in denitrification inFrontiers in microbiology · 2023Article
- Unraveling Anaerobic Metabolisms in a Hypersaline Sediment.Frontiers in microbiology · 2022Article
- Article
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1 author.
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Abstract
We have explored the use of optical oxygen electrodes to study oxygenic photosynthesis and heterotrophic activities in crystallizer brines of the salterns in Eilat, Israel. Monitoring oxygen uptake rates in the dark enables the identification of organic substrates that are preferentially used by the community. Addition of glycerol (the osmotic solute synthesized by Dunaliella) or dihydroxyacetone (produced from glycerol by Salinibacter) enhanced respiration rates. Pyruvate, produced from glycerol or from some sugars by certain halophilic Archaea also stimulated community respiration. Fumarate had a sparing effect on respiration, possibly as many halophilic Archaea can use fumarate as a terminal electron acceptor in respiration. Calculating the photosynthetic activity of Dunaliella by monitoring oxygen concentration changes during light/dark incubations is not straightforward as light also affects respiration of some halophilic Archaea and Bacteria due to action of light-driven proton pumps. When illuminated, community respiration of brine samples in which oxygenic photosynthesis was inhibited by DCMU decreased by ~40%. This effect was interpreted as the result of competition between two energy yielding systems: the bacteriorhodopsin proton pump and the respiratory chain of the prokaryotes. These findings have important implications for the interpretation of other published data on photosynthetic and respiratory activities in hypersaline environments.
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