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<i>Methanosarcina barkeri</i> - methanotrophic euryarchaeote Archaea
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Image #   28874D
Name:   Purple nonsulfur prokaryote Rhodobacter ferrooxidans
Copyright:   Copyright 2008 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Purple nonsulfur bacterium Rhodobacter ferrooxidans. Rhodobacter ferrooxidans is a rod shaped, anoxygenic photosynthethic prokaryote (bacterium) that is also capable of oxidizing iron / Fe (II) to iron / Fe (III), which then hydrolyzes to iron hydroxide (FeOH3). Modern-day photoautotrophic bacteria oxidize Fe(II) and use light energy for CO2 fixation. Seen here are rod shaped, R. ferrooxidans bacteria surrounded by crystalline iron hydroxide mineral phases. These organisms can significantly affect the geochemistry of the Earth's near surface environments. The acidophilic Fe(II) oxidizing bacteria and archaea play an important role in promoting acid mine drainage and neutrophilic Fe(II) oxidizing bacteria appear to contribute to the alteration of marine sediments.
Magnification*: x3.400
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   extreme environment extremophile extremophile environment extremophiles extremophilic extremophilic environment 28874D 12.01.08 bacteria bacterium bacilli bacillus rod rod shaped rod-shaped facilitated biomineralization iron oxidizing bacteria iron oxidizing bacterium oxidizing bacteria oxidizing bacterium purple nonsulfur bacterium purple nonsulfur bacteria heterotroph heterotrophs heterotrophic heterotrophic bacteria heterotrophic bacterium biomineralization iron crystal iron crystals iron mineral iron minerals iron mineralization bacteria iron mineralization mineralization photoautotroph photoautotrophs photoautotrophic photoautotrophic bacteria photoautotrophic bacterium photoautotrophic iron mineralization Fe oxidizing bacteria Fe oxidizing bacterium anoxygenic photosynthetic bacterium anoxygenic photosynthetic prokaryote anoxygenic photosynthetic bacteria neutrophilic oxidizing bacteria neutrophilic oxidizing bacterium marine sediments marine sediment acidophilic oxidizing bacteria acidophilic oxidizing bacterium iron mineral phase iron mineral phases crystalline mineral crystalline minerals goethite lepidocrocite SEM Rhodobacter Rhodobacter ferrooxidans

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