BIOL240 Lecture Notes - Lecture 10: Great Salt Lake, Thermoplasmatales, Electrochemical Gradient
Document Summary
Group that are only relatively recently recognized, High salt concentration: optimal and required these extreme conditions in order to grow and reproduce, Mechanism uses a carotenoid pigment called rhodopsin instead of chlorophyll: habitats: Green pigment is eukaryotic green algae that is predominant form of life in great salt lake, Dead sea is also very salty and has high concentrations of magnesium, Original marine environments have been subjected to evaporation which over time has lead to high salt concentrations. Great salt lake is equivalent to 10-fold concentration of sea water. Different pigments are evident at the different salt concentrations in the ponds, Lake hamara in egypt soda lake which has a very high alkaline ph of. Halobacterium- rod: intra and extracellular concentrations of ions: Equivalent to very dry environments: mechanism of bacteriorhodopsin activity: Energy generating but not photosynthetic in nature, Retinal which is a type of carotenoid is involved in this system,
