MBIO 1010 Lecture Notes - Lecture 14: Hyperthermophile, Industrial Microbiology, Methanopyrus

• School: University of Manitoba
• Department: Microbiology
• Course: MBIO 1010
• Professor: Christopher Rathgeber

Document Summary

Mesophiles: organisms that have midrange temperature optima; found in o warm-blooded animals: terrestrial and aquatic environments, temperate and tropical latitudes. Organisms that grow under very hot or very cold conditions. Inhabit permanently cold environments (for example deep ocean, arctic and antarctic environments) (figure 5. 21) Organisms that can grow at 0 c but have optima of 20 c to 40 c. More widely distributed in nature than true psychrophiles. Production of enzymes that function optimally in the cold. High unsaturated fatty acid content (note: saturated fatty acids freeze at higher than unsaturated fatty acids) The membrane isn"t (cid:373)o(cid:448)i(cid:374)g arou(cid:374)d (cid:271)e(cid:272)ause of the cold. Above ~65 c, only prokaryotic life forms exist (no eukaryotes) High prokaryotic diversity (both archaea and bacteria are represented. Thermophiles: organisms with growth temperature optima between 45 c and 80 c (terrestrial hot springs, very active compost). Inhabit hot environments, hydrothermal vents, that can experience temperatures in excess of 100 c including boiling hot springs and seafloor.