Portal:Fungi

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A fungus is any member of a large group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. The Fungi are classified as a kingdom that is separate from plants and animals. The discipline of biology devoted to the study of fungi is known as mycology or fungal biology, which is historically regarded as a branch of botany, even though genetic studies have shown that fungi are more closely related to animals than to plants. Fungi reproduce via spores and grow as hyphae, mycelia, and further specialized structures. Fungal spores are often produced on specialized structures or in fruiting bodies, such as the head of a mushroom. Abundant worldwide, most fungi are mostly invisible to the naked eye because of the small size of their structures, and their cryptic lifestyles in soil, on dead matter, and as symbionts of plants, animals, or other fungi. Fungi perform an essential role in the decomposition of organic matter and have fundamental roles in nutrient cycling and exchange. They have long been used as a direct source of food, such as mushrooms and truffles, as a leavening agent for bread, and in fermentation of various food products, such as wine, beer, and soy sauce.

Since the 1940s, fungi have been used for the production of antibiotics, and, more recently, various enzymes produced by fungi are used industrially and in detergents. Fungi are also used as biological agents to control weeds and pests. Many species produce bioactive compounds called mycotoxins, such as alkaloids and polyketides, that are toxic to animals including humans. The fruiting structures of a few species are consumed recreationally or in traditional ceremonies as a source of psychotropic compounds. Fungi can break down manufactured materials and buildings, and become significant pathogens of humans and other animals. Losses of crops due to fungal diseases or food spoilage can have a large impact on human food supplies and local economies. Despite their importance on human affairs, little is known of the true biodiversity of Kingdom Fungi, which has been estimated at around 1.5 million species, with about 5% of these having been formally classified.

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Polyozellus is a genus of fungi in the family Thelephoraceae, a grouping of mushrooms known collectively as the leathery earthfans. A monotypic genus, it contains the single species Polyozellus multiplex, first described in 1899, and commonly known as the blue chanterelle, the clustered blue chanterelle, or, in Alaska, the black chanterelle. The distinctive fruit body of this species resembles blue- to purple-colored clusters of vase- or spoon-shaped caps with veiny wrinkles on the undersurface that run down the length of the stem.

Polyozellus has had a varied taxonomic history and has been reclassified several times at both the family and genus level. The range of Polyozellus includes North America and eastern Asia, where P. multiplex may be found growing on the ground in coniferous forests, usually under spruce and fir trees. It is an edible species, and has been harvested for commercial purposes. Polyozellus multiplex contains the bioactive compound polyozellin, shown to have various physiological properties, including suppressive effects on stomach cancer.

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Pholiota squarrosa, commonly known as the shaggy scalycap, the shaggy pholiota, or the scaly pholiota, is a species of mushroom in the family Strophariaceae. Common in North America and Europe, it is often an opportunistic parasite, and has a wide range of hosts among deciduous trees, although it can also infect conifers. It can also live as a saprobe, deriving nutrients from decomposing wood. The mushroom is typically found growing in clusters at the base of trees and stumps. Both the cap and the stem are covered in small, pointed scales that are pointed downward and backward. The crowded gills are yellowish, then later rust-brown. The mushroom has an odor that, depending on the author, has been described as resembling garlic, lemon, radish, onion, or skunk. It has a strong taste, resembling radishes. Once thought to be edible, it is now considered and known to be poisonous, especially if consumed in combination with alcohol. The mushroom contains unique chemicals thought to help it infect plants by neutralizing defensive responses employed by them. The very similar P. squarrosoides differs in having a paler cap that is sticky between the scales, and smaller spores.

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Join Wikipedia:WikiProject Fungi or ask on the talk page.
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Credit: Nathan Wilson

The stinkhorn fungus, Phallus hadriani, photographed in Descanso Gardens, La Cañada Flintridge, California, United States.

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Did you know?

... that some species in the lichen genus Sticta can be used to assess the age of forests?
... that the stinkhorn fungus Pseudocolus fusiformis is commonly known as the stinky squid?
... that the mosaic puffball mushroom can bioaccumulate the trace metals copper and zinc?
... that coprophilous fungi are species of fungi that feed on animal feces?
... that the coprophilous mushroom Conocybe rickenii may be found in large numbers in gardens where horse manure has been used to enrich the soil?

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General images - show new batch

The following are images from various fungi-related articles on Wikipedia.

Image 1
Mycoloop links between phytoplankton and zooplankton
Chytrid‐mediated trophic links between phytoplankton and zooplankton (mycoloop). While small phytoplankton species can be grazed upon by zooplankton, large phytoplankton species constitute poorly edible or even inedible prey. Chytrid infections on large phytoplankton can induce changes in palatability, as a result of host aggregation (reduced edibility) or mechanistic fragmentation of cells or filaments (increased palatability). First, chytrid parasites extract and repack nutrients and energy from their hosts in form of readily edible zoospores. Second, infected and fragmented hosts including attached sporangia can also be ingested by grazers (i.e. concomitant predation). (from Marine fungi)
Image 2Ganoderma lingzhi (from Mushroom)
Image 3Pennate diatom from an Arctic meltpond, infected with two chytrid-like [zoo-]sporangium fungal pathogens (in false-colour red). Scale bar = 10 μm. (from Marine fungi)
Image 4Fungi within Zygomycota form progametangia with suspensors during mating (from Mating in fungi)
Image 5Morphological diversity of fungi collected from a marine sponge species, Ircinia variabilis (from Marine fungi)
Image 6Workup algorithm of fungal infection at a microbiology lab at a New England community hospital. (from Fungal infection)
Image 7The photochemistry of vitamin D₂ biosynthesis (from Medicinal uses of fungi)
Image 8Pholiota squarrosa growing at the base of a tree (from Mushroom)
Image 9The red yeast rice fungus, Monascus purpureus, can synthesize three statins. (from Medicinal uses of fungi)
Image 10Coprinopsis atramentaria, commonly known as the "ink cap" (from Mushroom)
Image 11Morchella elata asci viewed with phase contrast microscopy (from Mushroom)
Image 12Young Amanita phalloides "death cap" mushrooms, with a matchbox for size comparison (from Mushroom)
Image 13Morphological characteristics of the caps of mushrooms (from Mushroom)
Image 14Ferula mushroom in Bingöl, Turkey. This is an edible type of mushroom. (from Mushroom)
Image 15Phylogenetic and symbiogenetic tree of living organisms, showing a view of the origins of eukaryotes and prokaryotes (from Marine fungi)
Image 16Group photograph taken at a meeting of the British Mycological Society in 1913 (from Mycology)
Image 17Eumycetoma (from Fungal infection)
Image 18Fungi within Ascomycota form ascogonium and antheridium with trichogyne bridge (from Mating in fungi)
Image 19Pityriasis versicolor (from Fungal infection)
Image 20
Diagram of a mycoloop (fungus loop)
Parasitic chytrids can transfer material from large inedible phytoplankton to zooplankton. Chytrids zoospores are excellent food for zooplankton in terms of size (2–5 μm in diameter), shape, nutritional quality (rich in polyunsaturated fatty acids and cholesterols). Large colonies of host phytoplankton may also be fragmented by chytrid infections and become edible to zooplankton. (from Marine fungi)
Image 21
Roles of fungi in the marine carbon cycle
Roles of fungi in the marine carbon cycle by processing phytoplankton-derived organic matter. Parasitic fungi, as well as saprotrophic fungi, directly assimilate phytoplankton organic carbon. By releasing zoospores, the fungi bridge the trophic linkage to zooplankton, known as the mycoloop. By modifying the particulate and dissolved organic carbon, they can affect bacteria and the microbial loop. These processes may modify marine snow chemical composition and the subsequent functioning of the biological carbon pump. (from Marine fungi)
Image 22Amanita muscaria, a psychotropic mushroom commonly known as "fly agaric" (from Mushroom)
Image 23Mushrooms are considered a kind of fungal reproductive organ. (from Mycology)
Image 24Amanita muscaria, the most easily recognised "toadstool", is frequently depicted in fairy stories and on greeting cards. It is often associated with gnomes. (from Mushroom)
Image 25Oral candidiasis (from Fungal infection)
Image 26Agaricus bisporus, a cultivated edible mushroom with various names including "button mushroom", "portobello" and "champignon" (from Mushroom)
Image 27Agaricus bisporus, one of the most widely cultivated and consumed mushrooms (from Mushroom)
Image 28Lycoperdon perlatum (the "common puffball") has a glebal hymenium; when young, the interior is white, but it becomes brown containing powdery spores as the fungus matures. (from Mushroom)
Image 29Ling Zhi-8, an immunomodulatory protein isolated from Ganoderma lucidum (from Medicinal uses of fungi)
Image 30Close-up cross section of mushroom gills (from Mushroom)
Image 31Maitake, a polypore mushroom (from Mushroom)
Image 32Chytrid parasites of marine diatoms. (A) Chytrid sporangia on Pleurosigma sp. The white arrow indicates the operculate discharge pore. (B) Rhizoids (white arrow) extending into diatom host. (C) Chlorophyll aggregates localized to infection sites (white arrows). (D and E) Single hosts bearing multiple zoosporangia at different stages of development. The white arrow in panel E highlights branching rhizoids. (F) Endobiotic chytrid-like sporangia within diatom frustule. Bars = 10 μm. (from Marine fungi)
Image 33Psilocybe zapotecorum, a hallucinogenic mushroom (from Mushroom)
Image 34Leucocoprinus birnbaumii, commonly known as the "flowerpot parasol", at various stages of development (from Mushroom)
Image 35
Driftwood
(from Marine fungi)
Image 36Onychomycosis (from Fungal infection)
Image 37Neurospora crassa life cycle. The haploid mycelium reproduces asexually by two processes: (1) simple proliferation of existing mycelium, and (2) formation of conidia (macro- and micro-) which can be dispersed and then germinate to produce new mycelium. In the sexual cycle, mating can only occur between individual strains of different mating type, A and a. Fertilization occurs by the passage of nuclei of conidia or mycelium of one mating type into the protoperithecia of the opposite mating type through the trichogyne. Fusion of the nuclei of opposite mating types occurs within the protoperithecium to form a zygote (2N) nucleus. (from Mating in fungi)
Image 38
Lichen covered rocks
(from Marine fungi)
Image 39The blue gills of Lactarius indigo, a milk-cap mushroom (from Mushroom)
Image 40Salmon with fungal disease (from Marine fungi)
Image 41Boletus edulis, also known as "cep", an edible wild bolete found in Europe (from Mushroom)
Image 42Tinea corporis (from Fungal infection)
Image 43Typical mating fusion of two compatible monokaryons in Basidiomycota (from Mating in fungi)
Image 44There are over 100 psychoactive mushroom species of genus Psilocybe native to regions all around the world. (from Mushroom)
Image 45Agaricus bitorquis (the "pavement mushroom") emerging through asphalt concrete in summer (from Mushroom)
Image 46A tinder fungus, Fomes fomentarius (from Mushroom)
Image 47A mushroom (probably Russula brevipes) parasitized by Hypomyces lactifluorum resulting in a "lobster mushroom" (from Mushroom)
Image 48Amanita jacksonii buttons emerging from their universal veils (from Mushroom)