A novel cyanobacterium exhibiting an elevated tolerance for iron

Studies directed at cyanobacteria inhabiting iron-depositing hot springs may provide insights into the role of both ancient and contemporary cyanobacteria mediated iron transformations. Here we phylogenetically, morphologically and physiologically characterize a novel cyanobacterium isolated from an...

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Bibliographic Details
Published in:FEMS microbiology ecology 2005-05, Vol.52 (3), p.307-314
Main Authors: Brown, Igor I., Mummey, Daniel, Cooksey, Keith E.
Format: Article
Language:English
Subjects:
Bacterial Typing Techniques
Bacteriology
Biological and medical sciences
Bladder
Cell culture
Clumps
Culture media
Cyanobacteria
Cyanobacteria - classification
Cyanobacteria - genetics
Cyanobacteria - isolation & purification
Cyanobacteria - physiology
DNA, Bacterial - analysis
DNA, Ribosomal - analysis
Ecology
Freshwater
Fundamental and applied biological sciences. Psychology
Great Yellowstone area
Historical metallurgy
Homology
Hot springs
Hot Springs - microbiology
Iron
Iron - metabolism
Iron depositing hot spring
Iron tolerance
Microbiology
Microorganisms
Miscellaneous
Molecular Sequence Data
New genera
Novel cyanobacterium
Phylogeny
RNA, Ribosomal, 16S - genetics
Sequence Analysis, DNA
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Summary:Studies directed at cyanobacteria inhabiting iron-depositing hot springs may provide insights into the role of both ancient and contemporary cyanobacteria mediated iron transformations. Here we phylogenetically, morphologically and physiologically characterize a novel cyanobacterium isolated from an iron-depositing hot spring. Phylogenetic analyses indicate that the bacterium is a representative of a new genus, exhibiting a maximum 95.2% homology to database sequences. The isolate is a unicellular cyanobacterium with bladder-like cells typically packed as duplexes, or in extracellular polymeric substance covered clumps and small chains without the ability to produce baeocystes. No growth without added combined nitrogen occurred. While requiring relatively large amounts of iron for growth (>40 μM), the isolate was shown to facilitate removal of iron from culture media. These results suggest that the isolate may be an important component of an iron-depositing microbial community. The name “Chroogloeocystis siderophila” for this cyanobacterium is proposed.
ISSN:0168-6496
1574-6941
DOI:10.1016/j.femsec.2004.11.020