Planococcus halocryophilus
| Planococcus halocryophilus | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Planococcus halocryophilus | ||||||||||||
| Mykytczuk , Wilhelm & Whyte , 2012 |
Planococcus halocryophilus is a gram-positive bacterium that wasisolatedfrom the permafrost soil of the high Arctic, Canada's Ellesmere Island in 2011and described as a new species in 2012. It probably lives there in thin, very salty water veins at temperatures down to –16 ° C. The species epithet halocryophilus was given because of the species' high salt and cold tolerance ("halo" = salt; "cryo" = cold, frozen; "philos" = loving).
features
Planococcus halocryophilus is gram positive, aerobic and does not form spores . The single cells reach a diameter of 0.8 to 1.2 μm and occur solitary or in pairs. Colonies on a nutrient medium made from trypticase soy agar are bright orange, opaque, smooth, glittering, round and slightly convex in the center and reach a diameter of 2 to 3 mm after growth for three days at a temperature of 25 ° C. The species shows growth at temperatures from -16 to 37 ° C, with optimal growth being achieved at a temperature of 25 ° C. It is still metabolically active at −23 ° C. The salt tolerance ranges from a salt content of 0 to 19%, the pH value can be between 6 and 11. A high salt concentration is not a requirement for growth.
Individual evidence
- ↑ Nadia CS Mykytczuk, Simon J. Foote, Chris R. Omelon, Gordon Southam, Charles W. Greer and Lyle G. Whyte: Bacterial growth at −15 ° C; molecular insights from the permafrost bacterium Planococcus halocryophilus Or1 In: The ISME Journal , 2013, 7 (6): pp. 1211-1226. doi : 10.1038 / ismej.2013.8
literature
- Nadia CS Mykytczuk, Roland C. Wilhelm, Lyle G. Whyte. 2012. Planococcus halocryophilus sp. nov., an extreme sub-zero species from high Arctic permafrost. International Journal of Systematic and Evolutionary Microbiology, vol. 62, no. Pt 8, 1937-1944; doi: 10.1099 / ijs.0.035782-0 , online (PDF; 1.2 MB)