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Soil pH is a measure of the acidity or basicity (alkalinity) of a soil. pH is defined as the negative logarithm (base 10) of the activity of hydronium ions in a solution. In soils, it is measured in a slurry of soil mixed with water, and normally falls between 3 and 10, with 7 being neutral. Acid soils have a pH below 7 and alkaline soils have a pH above 7. Ultra-acidic soils and very strongly alkaline soils are rare.
Roseomonas alkaliterrae is a species of Gram negative, strictly aerobic, coccobacilli-shaped, pink-colored bacteria. It was first isolated from the soil around a geothermal hot spring in Tengchong, China. The species name refers to the alkaline soil from which the species was first isolated.
Roseomonas arcticisoli is a species of Gram negative, strictly aerobic, coccobacilli-shaped, light red-colored bacteria. It was first isolated from tundra soil near Ny-Ålesund in Svalbard, Norway. The species name refers to the Arctic soil from which it was first isolated.
Roseomonas hibiscisoli is a species of Gram negative, strictly aerobic, coccobacilli-shaped, pink-colored bacteria. It was first isolated from the rhizosphere of a Hibiscus syriacus plant, and the new species was proposed in 2017. The species name derives from the Hibiscus plant from which it was first isolated. Roseomonas rhizosphaerae was also previously isolated from the rhizosphere of a plant.
Roseomonas oryzae is a species of Gram negative, strictly aerobic, coccobacilli-shaped, pale pink-colored bacterium. It was first isolated from rice paddy rhizosphere soil in Western Ghats, Kankumbi, India. The species name is derived from Latin oryzae.
Roseomonas vinacea is a species of Gram negative, strictly aerobic, coccobacilli-shaped, wine-red-colored bacterium. It was first isolated from a soil sample collected from the Tibetan Plateau, China, and the species was first proposed in 2008. The species name is derived from Latin vinacea, referring to the color that the bacterial colonies form.
Sphingosinicella humi is a Gram-negative, rod-shaped bacterium that is a member of the genus Sphingosinicella. It is strictly aerobic, flagellated, and motile. Colonies are white, convex, circular, and slightly transparent. S. humi grows in the presence of arsenic and sodium chloride. The optimum temperature for growth is 28˚C, but S. humi can grow within the temperature range of 16-42 ˚C. The organism can grow in a pH range of 6.5-9. Culture growth occurs on Reasoner’s 2A agar medium and in 1/10 tryptic soy broth.
Tumebacillus ginsengisoli is a species of Gram positive, aerobic, bacterium. The cells are rod-shaped, non-motile, and form spores. It was first isolated from soil in a ginseng field in Pocheon, South Korea, and the species name is derived from the ginseng soil isolation location. T. ginsengisoli was the second species added to the genus Tumebacillus.
Alicyclobacillus sendaiensis is a species of Gram positive, strictly aerobic, bacterium. The bacteria are acidophilic and produced endospores. It was first isolated from soil in Aoba-yama Park, Sendai, Japan. The species was first described in 2003, and the name refers to the city from which it was first isolated. It was found during a survey in search of bacteria that produce thermostable collagenase.
Alicyclobacillus tengchongensis is a species of Gram positive, strictly aerobic, bacterium. The bacteria are acidophilic and produced endospores. It was first isolated from soil in a hot spring in Tengchong, China. The species was first described in 2014, and the name refers to the city from which it was first isolated.
Intrasporangium is a genus of Gram positive, nonmotile, endosporeforming bacteria. The genus name refers to the ability to form sporangia intercalary in the mycelial hyphae. The family Intrasporangiaceae is named after the genus, and Intrasporangium is the type genus for the family.
Intrasporangium calvum is a species of Gram positive, aerobic, endosporeforming bacterium. The species was initially isolated from air in a school dining room in the Soviet Union. The species was first described in 1967, and was the first and only species in the genus Intrasporangium until 2012.
Intrasporangium mesophilum is a species of Gram positive, strictly aerobic bacterium. The species was initially isolated from rhizospheric soil of an oilseed plant, Jatropha curcas. The species was first described in 2012, and its name refers to its mesophilic growth conditions.
Intrasporangium oryzae is a species of Gram positive, strictly aerobic bacterium. The species was initially isolated from rice paddy soil. The species was first described in 2007, and its name is derived from Latin oryzae. It was originally placed in the novel genus Humihabitans, but further research reclassified the species as a member of the existing genus, Intrasporangium. Because Humihabitans was monospecific, with H. oryzae as the only species, the genus is now defunct.
Phycicoccus cremeus is a species of Gram positive, strictly aerobic, non-motile, non-endosporeforming bacterium. The species was initially isolated from forest soil from the Changbai Mountains, Heilongjiang, China. The species was first described in 2011, and its name refers to the cream-colored colonies the species produces on R2A agar.
Phycicoccus dokdonensis is a species of Gram positive, strictly aerobic, non-motile, non-endosporeforming bacterium. The species was initially isolated from soil from the Liancourt Rocks, South Korea. The species was first described in 2008, and its name refers to Korean name (Dokdo) for the disputed Liancourt Rocks.
Phycicoccus ginsengisoli is a species of Gram positive, strictly aerobic, non-endosporeforming bacterium. The species was initially isolated from soil from a ginseng field in Gochang County, South Korea. The species was first described in 2016, and its name refers to the source of isolation.
Phycicoccus ginsenosidimutans is a species of Gram positive, strictly aerobic, non-endosporeforming bacterium. The species was initially isolated from soil from a ginseng field from Paektu Mountain, Jinlin District, China. The species was first described in 2016, and its name refers to the species ability to convert ginsenoside.
Terrabacter ginsenosidimutans is a species of Gram-positive, nonmotile, non-endosporeforming bacteria. Cells are short rods. It was initially isolated from ginseng soil from a farm near Pocheon, South Korea. The species was first described in 2010, and its name refers the bacteria's ability to transform ginsenosides into rare gypenosides.
Terrabacter terrigena is a species of Gram-positive, nonmotile, non-endosporeforming bacteria. Cells are rod-shaped. It was initially isolated from soil from around a wastewater treatment plant in South Korea. The species was first described in 2009, and its name is derived from Latin terrigena referring to the isolation of the type strain from soil.
References
- 1 2 Liu, H.; Wang, H.; Wang, G. (25 March 2011). "Intrasporangium chromatireducens sp. nov., a chromate-reducing actinobacterium isolated from manganese mining soil, and emended description of the genus Intrasporangium". International Journal of Systematic and Evolutionary Microbiology. 62 (2): 403–408. doi: 10.1099/ijs.0.030528-0 .