Actinomycetes -
Majority
of
them
are
mycelial.
They
are
Gram
positive
prokaryotes,
a
large
group
of
filamentous
bacteria
which
characteristically
show
branching
patterns
just
like
those
of
fungi,
to
give
rise
to
a
spreading
mycelium.
Also, like fungi, they often readily produce spores when grown in culture. They are easily isolated from soil. Most of these, particularly Streptomyces, produce antibiotics, and so are of great value to the pharmaceutical industry. Their main characteristics are:
(1)
Mycelial
(majority),
Gram
positive
prokaryotes.
(2)
Some
(euactinomycetes)
develop
only
in
mycelial
state
reproducing
by
unicellular
specialised
spores
(e.g.
Streptomyces,
Micromonospora
,
Actino
planes,
Strepto
sporangium,
Thermoactinomyces;
in
others
(proactinomycetes)
mycelial
development
is
transitory
and
often
limited,
specialised
spores
not
produced
and
reproduce
primarily
by
fragmentation
into
short
rod-shaped
cells
Index >> Microorganisms Types >> Actinomycetes
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