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

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{sup 6} and 10{sup 7} cultivable sulfate-reducing bacteria ml{sup {minus}1} day{sup {minus}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{sup 4} and 10{sup 6} cells ml{sup {minus}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 CO{sub 2} from sulfate reduction in the upper 5 mm accounted for 7 to 8% of the total photosynthetic CO{sub 2} demand of the mat.

Authors:
; ; ; ;  [1];  [2];  [3]
  1. Max Planck Inst. for Marine Microbiology, Bremen (Germany)
  2. National Inst. for Resources and Environment, Tsukuba, Ibaraki (Japan)
  3. Hebrew Univ. of Jerusalem (Israel)
Publication Date:
OSTI Identifier:
642342
Resource Type:
Journal Article
Journal Name:
Applied and Environmental Microbiology
Additional Journal Information:
Journal Volume: 64; Journal Issue: 8; Other Information: PBD: Aug 1998
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; EGYPTIAN ARAB REPUBLIC; LAKES; SEDIMENTS; SULFATE-REDUCING BACTERIA; CYANOBACTERIA; WATER POLLUTION; SULFATES

Citation Formats

Teske, A, Ramsing, N B, Habicht, K, Kuever, J, Joergensen, B B, Fukui, Manabu, and Cohen, Y. Sulfate-reducing bacteria and their activities in cyanobacterial mats of Solar Lake (Sinai, Egypt). United States: N. p., 1998. Web.
Teske, A, Ramsing, N B, Habicht, K, Kuever, J, Joergensen, B B, Fukui, Manabu, & Cohen, Y. Sulfate-reducing bacteria and their activities in cyanobacterial mats of Solar Lake (Sinai, Egypt). United States.
Teske, A, Ramsing, N B, Habicht, K, Kuever, J, Joergensen, B B, Fukui, Manabu, and Cohen, Y. 1998. "Sulfate-reducing bacteria and their activities in cyanobacterial mats of Solar Lake (Sinai, Egypt)". United States.
@article{osti_642342,
title = {Sulfate-reducing bacteria and their activities in cyanobacterial mats of Solar Lake (Sinai, Egypt)},
author = {Teske, A and Ramsing, N B and Habicht, K and Kuever, J and Joergensen, B B and Fukui, Manabu and Cohen, Y},
abstractNote = {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{sup 6} and 10{sup 7} cultivable sulfate-reducing bacteria ml{sup {minus}1} day{sup {minus}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{sup 4} and 10{sup 6} cells ml{sup {minus}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 CO{sub 2} from sulfate reduction in the upper 5 mm accounted for 7 to 8% of the total photosynthetic CO{sub 2} demand of the mat.},
doi = {},
url = {https://www.osti.gov/biblio/642342}, journal = {Applied and Environmental Microbiology},
number = 8,
volume = 64,
place = {United States},
year = {Sat Aug 01 00:00:00 EDT 1998},
month = {Sat Aug 01 00:00:00 EDT 1998}
}