Joostella marina
Classification
Higher order taxa
Bacteria; Bacteroidetes; Flavobacteria; Flavobacteriales; Flavobacteriaceae; Joostella:
Species
Joostella Marina
Description and significance
Joostella marina is a bright yellow, gram negative, aerobic bacteria. Joostella marina is a member of the Flavobacteriacea family. This family is composed of at least 72 different genera including Joostella.
Joostella marina is a non-motile, rod shaped bacteria which forms colonies when possible. When Joostella marina does forms colonies, they appear translucent and shiny. The edges of these colonies are clearly defined. The cells themselves are usually 1.0-2.0 µm long and 0.20-0.30 µm wide. These bacteria do not form spores. The pigments produced by these cells are bright yellow and non-flexirubin-type.
Habitat
Joostella marina is a marine microbe found in coastal seawater in the East Sea of Korea. This microbe was discovered at a depth of 100 meters. The East Sea of Korea, also known as the Sea of Japan, is unique because it has virtually no tides. This is because it is almost completely closed off from the Pacific Ocean. This sea also has lower salinity and a higher concentration of dissolved oxygen than the oceans. These conditions allow for a wide array of aquatic life.
The optimum environment for growth of Joostella marina has a pH range of 5.3-7.6, a temperature of 30 degrees Celsius, and a NaCl concentration of 1-3%.
Metabolism
Joostella marina is able to metabolize various sugars, allowing a wider array of food sources to be consumed. The carbon sources utilized by Joostella marina are glucose, sucrose, arabinose, mannose, and maltose. The major fatty acids are iso-C15:0, iso-C17:03-OH, and iso-C17:1v9c.
Current Research
Joostella marina was discovered by researchers in 2008. It is identified as strain En5T. This microbe is the only species that has been discovered so far in the Joostella genus. Besides the initial paper detailing its discovery and classification, no further research papers have been published on Joostella marina. However, the Flavobacteriacea family is being researched a significant amount. In 2006 alone 13 new genera and 20 new species were discovered, most of which came from marine environments.
References
[1. "An Introduction to the Family Flavobacteriaceae". The Prokaryotes. New York: Springer. 2006. pp. 455–480.]
[2. Uda, Michitaka. "Sea of Japan (sea, Pacific Ocean)." Encyclopedia Britannica Online. N.p., n.d. Web. Mar. 2014.]
[3. Zhe-Xue Quan, Yi-Ping Xiao, and Et. All. "Joostella Marina Gen. Nov., Sp. Nov., a Novel Member of the Family Flavobacteriaceae Isolated from the East Sea." International Journal of Systematic and Evolutionary Microbiology. N.p., 2008. Web. Mar. 2014.]
Edited by Kelsey O'Neil, student of Rachel Larsen at the University of Southern Maine
