ISSN:
1432-072X
Keywords:
Key words Anaerobic sulfate reduction
;
Incomplete
;
propionate oxidation
;
Marine environment
;
Low
;
temperature
;
Psychrophilic bacteria
;
Growth yields
;
Desulforhopalus vacuolatus
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract A new type of gas-vacuolated, sulfate-reducing bacterium was isolated at 10° C from reduced mud (E0 〈 0) obtained from a temperate estuary with thiosulfate and lactate as substrates. The strain was moderately psychrophilic with optimum growth at 18–19° C and a maximum growth temperature of 24° C. Propionate, lactate, and alcohols served as electron donors and carbon sources. The organism grew heterotrophically only with hydrogen as electron donor. Propionate and lactate were incompletely oxidized to acetate; traces of lactate were fermented to propionate, CO2, and possibly acetate in the presence of sulfate. Pyruvate was utilized both with and without an electron acceptor present. The strain did not contain desulfoviridin. The G+C content was 48.4 mol%. The differences in the 16S rRNA sequence of the isolate compared with that of its closest phylogenetic neighbors, bacteria of the genus Desulfobulbus, support the assignment of the isolate to a new genus. The isolate is described as the type strain of the new species and genus, Desulforhopalus vacuolatus.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s002030050371
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