Julia Elledge - Bacillus pumilus
Species: B. Pumilus
B. pumilus can be found in a wide variety of soils, plants, and surfaces. My particular sample was found in an area of Lewisville soils and Urban land, with 0 to 2 percent slopes. The temperature and humidity when the sample was taken were 73º F and 22%. Pressure was 30.03 in. and the solar radiation was at 17.55 MJm2. There had been no rainfall in the previous 24 hours. The specific location was a grassy area between my apartment building and the parking lot. The address is 2703 Manor Rd, Austin, TX, 78722.
Description and Significance
Colonial morphology: B. pumilus colonies are opaque and off-white. They are roughly circular, but with an irregular margin, and have a filamentous appearance.
Cellular morphology: B. pumilus is a gram positive rod bacterium with endospores.
B. pumilus can inhibit nematodes and fungal diseases once it colonizes a plant's root system. In fact, strain GB34 is used as an active ingredient in agricultural fungicides. It is also being evaluated for use in the commercial production of cellulase, which is an enzyme that can convert cellulolytic (plant) materials into soluble sugars or solvents.
B. pumilus has a single circular chromosome with 4000 genes.
Cell Structure, Metabolism and Life Cycle
Interesting features of cell structure; how it gains energy; what important molecules it produces.
Physiology and Pathogenesis
Biochemical characteristics, enzymes made, other characteristics that may be used to identify the organism; contributions to environment (if any).
If relevant, how does this organism cause disease? Human, animal, plant hosts? Virulence factors, as well as patient symptoms.
[Sample reference] Takai, K., Sugai, A., Itoh, T., and Horikoshi, K. "Palaeococcus ferrophilus gen. nov., sp. nov., a barophilic, hyperthermophilic archaeon from a deep-sea hydrothermal vent chimney". International Journal of Systematic and Evolutionary Microbiology. 2000. Volume 50. p. 489-500.
Page authored by _____, student of Prof. Kristine Hollingsworth at Austin Community College.