MBIO 3280 Lecture Notes - Lecture 6: Desulfotomaculum, Polaromonas, Psychrophile

• School: University of Manitoba
• Department: Microbiology
• Course: MBIO 3280
• Professor: Vladimir Yurkov

Document Summary

Some bacteria like bacillus, clostridium, and desulfotomaculum spp. From endospores that are resistant to heat, dying and freezing. Psychrophiles grow at 0 degrees c, grow best at < 15 degrees c and usually die above 20 degrees c. Polaromonas vacuolata: optimum is 4 degrees c, no growth above 12 degrees c. Psychrophiles: proteins, more a-helix and less b-sheet domains in proteins (more flexible but easily denatured, lipids. Increased branched, unsaturated and/or short-chain length fatty acids to keep membranes flexible at low temperatures. Glycerol) protects cells from ice crystal formations when frozen can also use sucrose or glucose in high (cid:272)on(cid:272)entration (cid:894)(cid:271)ut not used often (cid:271)e(cid:272)ause they"re a (cid:272)ar(cid:271)on sour(cid:272)e(cid:895) Visible light, uv light and gamma rays have biggest impact on microbial ecology. Visible light as an energy source for nine types of phototrophs (ten if include.