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  Sulfate-reducing bacteria and their activities in cyanobacterial mats of Solar Lake (Sinai, Egypt)

Teske, A., Ramsing, N., Habicht, K., Fukui, M., Küver, J., Jørgensen, B. B., et al. (1998). Sulfate-reducing bacteria and their activities in cyanobacterial mats of Solar Lake (Sinai, Egypt). Applied and Environmental Microbiology, 64(8), 2943-2951.

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 Creators:
Teske, Andreas1, Author           
Ramsing, N.B.1, Author           
Habicht, K.S.2, Author           
Fukui, M, Author
Küver, Jan3, Author           
Jørgensen, Bo Barker2, Author           
Cohen, Y, Author
Affiliations:
1Department of Molecular Ecology, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481696              
2Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Max Planck Society, ou_2481693              
3Department of Microbiology, Max Planck Institute for Marine Microbiology, Max Planck Society, Celsiusstraße 1, 28359 Bremen, DE, ou_2481695              

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 Abstract: The sulfate-reducing bacteria within the surface layer of the hypersaline cyanobacterial mat of Solar Lake (Sinai, Egypt) were investigated with combined microbiological, molecular, and biogeochemical approaches. The diurnally oxic surface layer contained between 10(6) and 10(7) cultivable sulfate-reducing bacteria ml(-1) and showed sulfate reduction rates between 1,000 and 2,200 nmol ml-l day(-1), both in the same range as and sometimes higher than those in anaerobic deeper mat layers. In the oxic surface layer and in the mat layers below, filamentous sulfate-reducing Desulfonema bacteria were found in variable densities of 10(4) to 106 cells ml(-1). A Desulfonema-related, diurnally migrating bacterium was detected with PCR and denaturing gradient gel electrophoresis within and below the oxic surface layer. Facultative aerobic respiration, filamentous morphology, motility, diurnal migration, and aggregate formation were the most conspicuous adaptations of Solar Lake sulfate-reducing bacteria to the mat matrix and to diurnal oxygen stress. A comparison of sulfate reduction rates within the mat and previously published photosynthesis rates showed that CO2 from sulfate reduction in the upper 5 mm accounted for 7 to 8% of the total photosynthetic CO2 demand of the mat.

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Language(s): eng - English
 Dates: 1998
 Publication Status: Issued
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000075127200028
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Title: Applied and Environmental Microbiology
  Other : Appl. Environ. Microbiol.
Source Genre: Journal
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Publ. Info: American Society for Microbiology (ASM)
Pages: - Volume / Issue: 64 (8) Sequence Number: - Start / End Page: 2943 - 2951 Identifier: ISSN: 0099-2240
CoNE: https://pure.mpg.de/cone/journals/resource/954927519600