Fibroporia vaillantii
Encyclopedia
Fibroporia vaillantii, also known as mine fungus, white pore fungus, Antrodia vaillantii, Polyporus vaillantii, and various other names is a wood-decaying fungus
which can occur on timber
in humid conditions. The fungus causes brown rot of pine wood, in which cellulose
and hemicellulose
are broken down, leading to brown discoloration and shrinkage of wood. It has been/is sometimes considered to be a fungus causing dry rot
(ref?), although that term is more often used for wood decay due to a different fungus, Serpula lacrymans
.
of 40 to 50 percent. In humid atmospheres, the white cotton-like mycelium
can grow on wood surfaces and cross inert materials, similar to the true dry rot fungus, Serpula lacrymans
. In newly grown mycelium, fine drops of clear liquid may be present. The optimal temperature for growth is 28 °C; it will grow at temperatures between 3 and 36 °C. The fruiting body is an irregular white plate with a thickness of 2 to 12 mm.
Wood-decay fungus
A wood-decay fungus is a variety of fungus that digests moist wood, causing it to rot. Some wood-decay fungi attack dead wood, such as brown rot, and some, such as Armillaria , are parasitic and colonize living trees. Fungi that not only grow on wood but actually cause it to decay, are called...
which can occur on timber
Timber
Timber may refer to:* Timber, a term common in the United Kingdom and Australia for wood materials * Timber, Oregon, an unincorporated community in the U.S...
in humid conditions. The fungus causes brown rot of pine wood, in which cellulose
Cellulose
Cellulose is an organic compound with the formula , a polysaccharide consisting of a linear chain of several hundred to over ten thousand β linked D-glucose units....
and hemicellulose
Hemicellulose
A hemicellulose is any of several heteropolymers , such as arabinoxylans, present along with cellulose in almost all plant cell walls. While cellulose is crystalline, strong, and resistant to hydrolysis, hemicellulose has a random, amorphous structure with little strength...
are broken down, leading to brown discoloration and shrinkage of wood. It has been/is sometimes considered to be a fungus causing dry rot
Dry rot
Dry rot refers to a type of wood decay caused by certain types of fungi, also known as True Dry Rot, that digests parts of the wood which give the wood strength and stiffness...
(ref?), although that term is more often used for wood decay due to a different fungus, Serpula lacrymans
Serpula lacrymans
Serpula lacrymans is one of the fungi that are responsible for dry rot. It is a basidiomycete in the order Boletales.-Taxonomy:The species was first described under the name Boletus lacrymans by Franz Xavier von Wulfen in 1781...
.
Description
The fungus grows on wood from coniferous trees, such as pine wood, under damp conditions, with a wood moisture contentEquilibrium moisture content
The moisture content of wood below the fibre saturation point is a function of both relative humidity and temperature of surrounding air. The equilibrium moisture content is the moisture content at which the wood is neither gaining or losing moisture; this however, is a dynamic equilibrium and...
of 40 to 50 percent. In humid atmospheres, the white cotton-like mycelium
Mycelium
thumb|right|Fungal myceliaMycelium is the vegetative part of a fungus, consisting of a mass of branching, thread-like hyphae. The mass of hyphae is sometimes called shiro, especially within the fairy ring fungi. Fungal colonies composed of mycelia are found in soil and on or within many other...
can grow on wood surfaces and cross inert materials, similar to the true dry rot fungus, Serpula lacrymans
Serpula lacrymans
Serpula lacrymans is one of the fungi that are responsible for dry rot. It is a basidiomycete in the order Boletales.-Taxonomy:The species was first described under the name Boletus lacrymans by Franz Xavier von Wulfen in 1781...
. In newly grown mycelium, fine drops of clear liquid may be present. The optimal temperature for growth is 28 °C; it will grow at temperatures between 3 and 36 °C. The fruiting body is an irregular white plate with a thickness of 2 to 12 mm.