Decomposition
Shiitake mushrooms are classified as a
fungus. In
order to be considered a fungus
the organism
must be heterotrophic.
This means they
do not make their own
food. The Shiitake
mushroom plays an
important role in its
environment in
decomposing dead organic
material. The fungus usually grows on trees that have
broad
leaves.
Lentinula edodes
is most
commonly
found on chestnut trees.
White rot and brown rot are
two different classifications of decomposing fungi.
Lentinula edodes
is known as a white rot fungus. White rot fungi are
capable of degrading lignin and brown rot fungi are not.
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The Shiitake mushroom here is found on oak wood.
Through the process of extracellular digestion, it will be able to
decompose this tree.
Photo
Copyright: Clive Shirley |
An Out of Body
Experience
When one thinks of digestion they
commonly
think of it as an internal
process.
For the Shiitake,
and other
fungi, food is first
digested outside
the
body. This special type
of
digestion is known as
extracellular
digestion. The fungi carry out
extracellular digestion because most
molecules
from their
food are too
large to diffuse across
their
plasma
membranes.
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