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purple sulfur bacteria
English Wikipedia - The Free Encyclopedia
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Purple sulfur bacteria
The
purple sulfur bacteria
are a group of
Proteobacteria
capable of
photosynthesis
, collectively referred to as
purple bacteria
. They are
anaerobic
or
microaerophilic
, and are often found in
hot springs
or
stagnant water
. Unlike
plants
,
algae
, and
cyanobacteria
, they do not use
water
as their
reducing agent
, and so do not produce
oxygen
. Instead they use
hydrogen sulfide
, which is
oxidized
to produce granules of elemental
sulfur
. This in turn may be oxidized to form
sulfuric acid
.
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