Tyromyces chioneus

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Tyromyces chioneus
Tyromyces.chioneus.-.lindsey.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Polyporales
Family: Polyporaceae
Genus: Tyromyces
Species:
T. chioneus
Binomial name
Tyromyces chioneus
(Fr.) P.Karst. (1881)
Synonyms [1]
  • Boletus candidus Pers. (1801)
  • Polyporus chioneusFr. (1815)
  • Polyporus albellus Peck (1878)
  • Bjerkandera chionea(Fr.) P.Karst. (1881)
  • Leptoporus chioneus(Fr.) Quél. (1886)
  • Polystictus chioneus(Fr.) Gillot & Lucand (1890)
  • Ungularia chionea(Fr.) Lázaro Ibiza (1916)
  • Leptoporus albellus(Peck) Bourdot & L.Maire (1920)
  • Leptoporus albellus subsp. chioneus(Fr.) Bourdot & Galzin (1925)
  • Leptoporus lacteus f. albellus(Peck) Pilát (1938)
  • Tyromyces albellus(Peck) Bondartsev& Singer (1941)

Tyromyces chioneus, commonly known as the white cheese polypore, is a species of polypore fungus. A widely distributed fungus, it has a circumpolar distribution, in temperate boreal pine forests, of Asia, Europe, and North America, causes white rot in dead hardwood trees, especially birch.

Contents

Taxonomy

The species was first described as Polyporus chioneus by Elias Fries in 1815. It was transferred to the genus Tyromyces by Petter Karsten in 1881. [1] Tyromyces chioneus is the type species of Tyromyces. The specific epithet chioneus means "snow", referring to its white color. It is commonly known as the "white cheese polypore". [2]

Description

pore surface Tyromyces.chioneus2.-.lindsey.jpg
pore surface

The fruit bodies are semicircular to fan-shaped brackets that measure up to 8 cm (3 in) broad by 10 cm (4 in) wide, with a thickness of 0.5–2 cm (0.2–0.8 in). The upper surface is initially white before aging to yellowish or grayish, and has a texture ranging from smooth to tomentose. The undersurface features white to cream-colored, round to angular pores measuring 3–4 per millimeter. The flesh is soft and fleshy when young, but becomes hard and brittle in age or when dry. It has a mild or indistinct taste, and a pleasant odor. [3]

It has a white spore print, and the spores are smooth, cylindrical, hyaline (translucent), with dimensions of 4–5 by 1.5–2  µm. [2] The basidia are club-shaped, four-spored, and measure 10–15 by 4–5 µm; they have a clamp at their base. The hyphal system is dimitic, consisting of generative and skeletal hyphae. The generative hyphae have clamps and are intricately branched. The skeletal hyphae, in contrast, are thick-walled, rarely branched, and measure 2–4.5 µm in diameter. Although cystidia are absent from the hymenium, there are fused cystidioles (immature cystidia) measuring 15–20 by 4–5 µm. [3]

The species is inedible. [4]

Habitat and distribution

Tyromyces chioneus causes white rot in dead hardwood trees. Its most common host is birch. The species has a circumpolar distribution, in temperate boreal pine forests, including Asia, Europe, and North America. [3] In Greenland, it is common on Betula pubescens . [5]

Chemistry

Cultures of the fungus have been shown to contain a sesquiterpene with anti-HIV activity in laboratory experiments. [6]

Related Research Articles

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Daedaleopsis confragosa, commonly known as the thin walled maze polypore or the blushing bracket, is a species of polypore fungus in the family Polyporaceae. A plant pathogen, it causes a white rot of injured hardwoods, especially willows. The fruit bodies are semicircular and tough, have a concentrically zoned brownish upper surface, and measure up to 20 cm (8 in) in diameter. The whitish underside turns gray-brown as the fruit body ages, but bruises pink or red. It is found all year and is common in northern temperate woodlands of eastern North America, Europe, and Asia. The species was first described from Europe in 1791 as a form of Boletus, and has undergone several changes of genus in its taxonomic history. It acquired its current name when Joseph Schröter transferred it to Daedaleopsis in 1888.

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<i>Xylobolus frustulatus</i> Species of fungus

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<i>Royoporus badius</i> Species of fungus

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<i>Tricholoma vernaticum</i> Species of fungus

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<i>Pycnoporellus alboluteus</i> Species of fungus

Pycnoporellus alboluteus, commonly known as the orange sponge polypore, is a species of polypore fungus in the family Fomitopsidaceae. Distributed throughout the boreal conifer zone, the fungus is found in mountainous regions of western North America, and in Europe. It causes a brown cubical rot of conifer wood, especially spruce, but also fir and poplar. The soft, spongy orange fruit bodies grow spread out on the surface of fallen logs. Mature specimens have tooth-like or jagged pore edges. A snowbank mushroom, P. alboluteus can often be found growing on logs or stumps protruding through melting snow. Although the edibility of the fungus and its usage for human culinary purposes are unknown, several species of beetles use the fungus as a food source.

Haploporus thindii is a species of poroid crust fungus in the family Polyporaceae. Found in China and India, it causes a white rot in woody substrates.

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<i>Loweomyces fractipes</i> Species of fungus

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Tyromyces pulcherrimus, commonly known as the strawberry bracket, is a species of poroid fungus in the family Polyporaceae. It is readily recognisable by its reddish fruit bodies with pores on the cap underside. The fungus is found natively in Australia and New Zealand, where it causes a white rot in living and dead logs of southern beech and eucalyptus. In southern Brazil, it is an introduced species that is associated with imported eucalypts.

Butyrea is a genus of two species of crust fungi in the family Steccherinaceae.

Haploporus septatus is a species of poroid crust fungus in the family Polyporaceae. Found in China, it causes a white rot in decomposing angiosperm wood.

Antella niemelaei is a species of poroid crust fungus in the family Steccherinaceae.

<i>Amylocystis lapponica</i> Species of fungus

Amylocystis lapponica is a species of bracket fungus in the family Fomitopsidaceae, and the type species of genus Amylocystis. It produces medium-sized, annual fruit bodies that are soft, and have a strong, distinct smell. The fungus is a saprophyte that feeds on coniferous wood of logs lying on the ground, and causes brown rot. It is a rather rare species that only occurs in old-growth forest.

References

  1. 1 2 "Species Synonymy: Tyromyces chioneus (Fr.) P. Karst., Revue mycol., Toulouse 3(no. 9): 17 (1881)". Species Fungorum. CAB International. Retrieved 2013-12-01.
  2. 1 2 Roody WR. (2003). Mushrooms of West Virginia and the Central Appalachians. University Press of Kentucky. p. 388. ISBN   978-0-8131-2813-9.
  3. 1 2 3 Ryvarden L, Gilbertson RL (1993). European Polypores. MeripilusTyromyces. Oslo, Norway: Fungiflora. pp. 686–7.
  4. Phillips, Roger (2010). Mushrooms and Other Fungi of North America . Buffalo, NY: Firefly Books. p.  310. ISBN   978-1-55407-651-2.
  5. Elborne SA, Knudesen H. "Larger fungi associated with Betula pubescens in Greenland". The Greenland Mountain Birch Zone, Southwest Greenland. Meddr Grønland, Bioscience. Vol. 33. Copenhagen: Museum Tusculanum Press. pp. 77–80. ISBN   978-87-635-1204-6.
  6. Liu D-Z, Wang F, Yang L-M, Zheng Y-T, Liu J-K (2007). "A new cadinane sesquiterpene with significant anti-HIV-1 activity from the cultures of the basidiomycete Tyromyces chioneus". Journal of Antibiotics. 60 (5): 332–4. doi: 10.1038/ja.2007.44 . PMID   17551214.