ISSN:
1432-072X
Keywords:
Ectothiorhodospira marismortui sp. nov.
;
Purple sulfur bacteria
;
Sulfide
;
Photoorganotrophic
;
Anaerobic
;
Halophilic
;
16S rRNA oligonucleotide catalog
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract A novel type of purple sulfur bacterium was isolated from a hypersaline sulfur spring on the shore of the Dead Sea. The cells of the isolate are irregularly rod-shaped or curved, and motile by means of a tuft of polar flagella. The photosynthetic system, containing bacteriochlorophyll a and carotenoids of the spirilloxanthin series, is located on stacks of lamellar membranes in the cell cytoplasm. The organism can grow either photoautotrophically with sulfide as electron donor, which is oxidized via extracellular sulfur to sulfate, or photoheterotrophically, using acetate, succinate, fumarate, malate or pyruvate as carbon sources. The bacterium is obligately anaerobic, and requires a source of reduced sulfur for growth. The isolate is moderately halophilic, and grows optimally at NaCl concentrations between 3 and 8%, temperatures between 30 and 45°C, and neutral pH. 16S ribosomal RNA oligonucleotide cataloging suggests a close relationship to purple sulfur bacteria of the genus Ectothiorhodospira. As the isolate differs greatly from the described members of the genus Ectothiorhodospira, we describe the isolate as a new species, and propose the name Ectothiorhodospira marismortui sp. nov.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00454869
Permalink