Flavobacterium hibernum: Difference between revisions
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==Description and Significance== | ==Description and Significance== | ||
''Flavobacterium hibernum'', meaning “wintry yellow bacteria”, is a Gram negative rod-shaped, aerobic bacterium, able to grow on cold, nutrient-poor media. First isolated from Crooked Lake in Antarctica (McCammon, 1998), but is now known to be found worldwide, in freshwater, ice, and soil ecosystems, and is largely unexplored genetically (Chen, 2006). An optimal growth temperature of 26ºC groups ''F. hibernum'' with psychrotrophic microbes, although the temperatures at which growth was possible ranged from -7ºC to 30ºC. This bacterium exhibits gliding motility, the mechanism of which is unknown. However, this method of motility may relate to its ability to lyse Gram-positive cells (such as ''E. coli'') as a bacteriovore in the food web. ''F. hibernum'' is able to utilize a wide variety of sugars and substrate containing other nutrients. | |||
Additionally, ''Flavobacterium hibernum'' and other ''Flavobacteria'' are commonly found in aquatic environments, including treeholes where container-breeding mosquitoes breed. ''Flavobacterium'' are consumed by several species of mosquito, including ''Anopheles gambiae'' and ''Aedes triseriatus'', which can act as vectors for disease (Chen, 2010). It has been proposed that ''F. hibernum'' or other members of its genus could be modified to deliver toxins from ''B. thuringiensis'' or ''B. sphaericus'' and be used as a “novel insecticide to lower mosquito populations” (Chen, 2010). However, care must be taken, as some species of ''Flavobacterium'' are toxic to fish. | |||
==Genome Structure== | ==Genome Structure== | ||
Revision as of 20:58, 10 April 2012
Classification
Domain: Bacteria Phylum: Bacteroidetes Class: Flavobacteria Order: Flavobacteriales Family: Flavobacteriaceae
Species
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NCBI: Taxonomy |
Flavobacterium hibernum
Description and Significance
Flavobacterium hibernum, meaning “wintry yellow bacteria”, is a Gram negative rod-shaped, aerobic bacterium, able to grow on cold, nutrient-poor media. First isolated from Crooked Lake in Antarctica (McCammon, 1998), but is now known to be found worldwide, in freshwater, ice, and soil ecosystems, and is largely unexplored genetically (Chen, 2006). An optimal growth temperature of 26ºC groups F. hibernum with psychrotrophic microbes, although the temperatures at which growth was possible ranged from -7ºC to 30ºC. This bacterium exhibits gliding motility, the mechanism of which is unknown. However, this method of motility may relate to its ability to lyse Gram-positive cells (such as E. coli) as a bacteriovore in the food web. F. hibernum is able to utilize a wide variety of sugars and substrate containing other nutrients. Additionally, Flavobacterium hibernum and other Flavobacteria are commonly found in aquatic environments, including treeholes where container-breeding mosquitoes breed. Flavobacterium are consumed by several species of mosquito, including Anopheles gambiae and Aedes triseriatus, which can act as vectors for disease (Chen, 2010). It has been proposed that F. hibernum or other members of its genus could be modified to deliver toxins from B. thuringiensis or B. sphaericus and be used as a “novel insecticide to lower mosquito populations” (Chen, 2010). However, care must be taken, as some species of Flavobacterium are toxic to fish.
Genome Structure
Describe the size and content of the genome. How many chromosomes? Circular or linear? Other interesting features? What is known about its sequence?
Cell Structure, Metabolism and Life Cycle
Interesting features of cell structure; how it gains energy; what important molecules it produces.
Ecology and Pathogenesis
Habitat; symbiosis; biogeochemical significance; contributions to environment.
If relevant, how does this organism cause disease? Human, animal, plant hosts? Virulence factors, as well as patient symptoms.
References
Author
Page authored by _____, student of Prof. Jay Lennon at Michigan State University.
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