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Oren A, Pri-El N, Shapiro O, et al. Buoyancy studies in natural communities of square gas-vacuolate archaea in saltern crystallizer ponds. Saline Syst. 2006;2:4doi: 10.1186/1746-1448-2-4.
Oren, A., Pri-El, N., Shapiro, O., & Siboni, N. (2006). Buoyancy studies in natural communities of square gas-vacuolate archaea in saltern crystallizer ponds. Saline systems, 24. https://doi.org/10.1186/1746-1448-2-4
Oren, Aharon, et al. "Buoyancy studies in natural communities of square gas-vacuolate archaea in saltern crystallizer ponds." Saline systems vol. 2 (2006): 4. doi: https://doi.org/10.1186/1746-1448-2-4
Oren A, Pri-El N, Shapiro O, Siboni N. Buoyancy studies in natural communities of square gas-vacuolate archaea in saltern crystallizer ponds. Saline Syst. 2006 Apr 14;2:4. doi: 10.1186/1746-1448-2-4. PMID: 16613609; PMCID: PMC1459177.
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Saline Syst. 2006 Apr 14;2:4. doi: 10.1186/1746-1448-2-4.

Buoyancy studies in natural communities of square gas-vacuolate archaea in saltern crystallizer ponds.

Saline systems

Aharon Oren, Nuphar Pri-El, Orr Shapiro, Nachshon Siboni

Affiliations

  1. Department of Plant and Environmental Sciences, Hebrew University of Jerusalem, Jerusalem, Israel. [email protected]

PMID: 16613609 PMCID: PMC1459177 DOI: 10.1186/1746-1448-2-4

Abstract

BACKGROUND: Possession of gas vesicles is generally considered to be advantageous to halophilic archaea: the vesicles are assumed to enable the cells to float, and thus reach high oxygen concentrations at the surface of the brine.

RESULTS: We studied the possible ecological advantage of gas vesicles in a dense community of flat square extremely halophilic archaea in the saltern crystallizer ponds of Eilat, Israel. We found that in this environment, the cells' content of gas vesicles was insufficient to provide positive buoyancy. Instead, sinking/floating velocities were too low to permit vertical redistribution.

CONCLUSION: The hypothesis that the gas vesicles enable the square archaea to float to the surface of the brines in which they live was not supported by experimental evidence. Presence of the vesicles, which are mainly located close to the cell periphery, may provide an advantage as they may aid the cells to position themselves parallel to the surface, thereby increasing the efficiency of light harvesting by the retinal pigments in the membrane.

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