[Location: Location_Category='CONTINENT', Location_Type='ANTARCTICA', Detailed_Location='Vestfold Hills']
The Geochemistry, Ecology and Taxonomy of Antarctic Methanogenic BacteriaEntry ID: ASAC_264
Abstract: The Antarctic methanogen Methanococcoides burtonii contained only diether phospholipids. These membrane components were analysed by gas chromatography and gas chromatography mass spectrometry. Of particular interest was the occurrence of unsaturated diether lipids in M. burtonii; unsaturated ether lipids accounted for 57% of the diether phospholipids. To our knowledge, unsaturated ether lipids ... have not been previously reported in a methanogen. The presence of the unsaturated ether lipids in M. burtonii is probably the result of temperature adaptation by the bacterium. it may be possible to use these components as a chemical signature for methanogens in Antarctic and Southern Ocean environments.
From the abstract of one of the papers:
The 16S rRNAs of nine new species of prokaryotes, that had been isolated from four lakes of the Vestfold Hills, have been sequenced. These sequences were compared with those of their closest taxonomic relatives available from publicly available databases. The Antarctic species were of wide diversity with representatives from the domains Archaea and Bacteria (sensu Woese). Generally, they were most closely related to organisms from marine environments. The sequence dissimilarity between the rRNA sequences of the Antarctic strains and their nearest known relatives suggest they diverged from each other much earlier than the establishment of their modern Antarctic habitat. The conserved nature of the 16S rRNA molecule suggests it may not be as useful for detecting evolutionary change in Antarctic prokaryotes as distinct from non-Antarctic prokaryotes. Although the optimal temperature for growth of each species is well above the temperature of its environment, each has a reduced optimal temperature for growth when compared with its taxonomic counterpart from non-Antarctic environments. The vast majority of Antarctic prokaryotes remains to be described.
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Start Date: 1987-09-30Stop Date: 1988-03-31
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Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_264 when using these data.
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Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 8 9333 6306
Fax: +61 8 9387 8211
Email: peter.franzmann at csiro.au
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Postal Code: 6014
Summons, R.E., Franzmann, P.D., Nichols, P.D. (1998), Carbon isotopic fractionation associated with methylotrophic methanogens., Organic Geochemistry, 28, 465-475
Franzmann, P.D., Liu, Y., Balkwill, D.L., Conway de Macario, E., Boone, D.R. (1997), Methanogenium frigidus sp. nov., a psychrophilic H2-using methanogen from Ace Lake, Antarctica., International Journal of Systematic Bacteriology, 47, 1068-1072
Franzmann, P.D., Dobson, S.J. (1993), The phylogeny of bacteria from a modern Antarctic refuge., Antarctic Science, 5, 267-270
Spielmeyer, W., McMeekin, T.A., Miller, J., Franzmann, P.D. (1993), Phylogeny of the Antarctic bacterium, Carnobacterium alterfunditum., Polar Biology, 13, 501-503
Nichols, P.D., Shaw, P.M., Mancuso, C.A., Franzmann, P.D. (1993), Analysis of archaeal di- and tetra phospholipids by high temperature capillary gas chromatography., Journal of Microbiological Methods, 18, 1-9
Nichols, P.D., Franzmann, P.D. (1992), Unsaturated diether phospholipids in the antarctic methanogen Methanococcoides burtonii., FEMS Microbiology Letters, 98, 205-208
Franzmann, P.D., Springer, N., Ludwig, W., Conway de Macario, E., and Rohde, M. (1992), A methanogenic archaeon from Ace Lake, Antarctica: Methanococcoides burtonii sp. nov., Systematic and Applied Microbiology, 15, 573-581
Franzmann, P.D. and M. Rohde. (1991), An obligately anaerobic, coiled bacterium from Ace Lake, Antarctica., Journal of General Microbiology, 137, 2191-2196
Mancuso, C.A., Franzmann, P.D., Burton, H.R., and P.D. Nichols. (1990), Microbial community structure and biomass of an antarctic methanogenic lake ecosystem as determined by phosopholipid analysis., Microbial Ecology, 19, 73-95
Franzmann, P.D., Roberts, N.J., Mancuso, C.A., Burton, H.R., and T.A. McMeekin. (1991), Methane production in meromictic Ace Lake, Antarctica., Hydrobiologia, 210, 191-201
Franzmann, P.D., Höpfl, P., Weiss, N., and B.J. Tindall. (1991), Psychrotrophic, lactic acid-producing bacteria from anoxic waters in Ace Lake, Antarctica; Carnobacterium funditum sp. nov. and Carnobacterium alterfunditum sp. nov., Archives of Microbiology, 156, 255-262
Creation and Review Dates
DIF Creation Date: 2000-07-20
Last DIF Revision Date: 2011-11-21