BBlecture17S09s - The The Archaea Archaea : Euryarchaeota :...

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Unformatted text preview: The The Archaea Archaea : Euryarchaeota : Euryarchaeota .1: 1: Phylogenetic Overview of the Phylogenetic Overview of the Archaea Archaea .3: 3: Extremely Halophilic Extremely Halophilic Archaea Archaea .4: 4: Methane-Producing Methane-Producing Archaea Archaea : Methanogens : Methanogens .5: 5: Thermoplasmatales Thermoplasmatales .6: 6: Thermococcales and Thermococcales and Methanopyrus Methanopyrus .7: 7: Archaeoglobales Archaeoglobales Euryarch1 phylogenetic tree of the phylogenetic tree of the Archaea Archaea (Fig 17.1, 12 th ed) Euryarch2 extreme halophiles extreme halophiles : : require require high salt concentration chemoorganotrophs, obligate aerobes Halobacterium has been most extensively studied sodium ion (Na + ) helps stabilize glycoprotein cell wall potassium ion (K + ) pumped into cytoplasm as compatible solute cytoplasmic proteins require high concentrations of K + some can use light to generate ATP , using bacteriorhodopsin Euryarch3 Great Salt Lake, Utah Great Salt Lake, Utah : ~10x more saline than seawater greenish colour is due to a halophilic alga ( Dunaliella salina) & halophilic cyanobacteria (Fig 17.2, 12 th ed) Euryarch4 seawater evaporating ponds near San Francisco seawater evaporating ponds near San Francisco red-purple colour due to pigments of the archeon Halobacterium (Fig 17.2, 12 th ed) Euryarch5 Lake Hamara, Egypt...
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BBlecture17S09s - The The Archaea Archaea : Euryarchaeota :...

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