Everything about Halobacteria totally explained
» Note: The word "halobacteria" is also the plural form of the word "halobacterium". Halobacteria are more correctly called
Haloarchaea, but halobacteria remains in common usage as they were originally designated as such before the existence of the domain
Archaea was realised.
In
taxonomy, the
Halobacteria (also
Halomebacteria) are a
class of the
Euryarchaeota, found in
water saturated or nearly saturated with
salt. They are also called
halophiles, though this name is also used for other organisms which live in somewhat less concentrated salt water. They are common in most environments where large amounts of salt, moisture, and organic material are available.
Halobacteria can grow
aerobically, anaerobically, or by means of
photosynthesis. Parts of the
membranes of halobacteria are purplish in color, and large blooms of Halobacteria appear reddish, from the pigment
bacteriorhodopsin, related to the
retinal pigment
rhodopsin. This pigment is used to absorb light, which provides energy to create
ATP. Halobacteria also possess a second pigment,
halorhodopsin, which pumps chloride ions in the cell in response to photons, creating a voltage gradient and assisting in the production of energy from light. The process is unrelated to other forms of
photosynthesis involving electron transport however, and halobacteria are incapable of
fixing carbon from
carbon dioxide.
Further Information
Get more info on 'Halobacteria'.
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