Portal:Fungi

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The Fungi Portal

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 futher 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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Panellus stipticus, commonly known as the bitter oyster, the astringent panus, the luminescent panellus, or the stiptic fungus, is a species of fungus in the family Mycenaceae, and the type species of the genus Panellus. A common and widely distributed species, it is found in Asia, Australasia, Europe, and North America, where it grows in groups or dense overlapping clusters on the logs, stumps, and trunks of deciduous trees, especially beech, oak, and birch. During the development of the fruit bodies, the mushrooms start out as tiny white knobs, which, over a period of one to three months, develop into fan- or kidney-shaped caps that measure up to 3 cm (1.2 in) broad. The caps are orange-yellow to brownish, and attached to the decaying wood by short stubby stalks that are connected off-center or on the side of the caps. The fungus was given its current scientific name in 1879, but has been known by many names since French mycologist Jean Bulliard first described it as Agaricus stypticus in 1783. Molecular phylogenetic analysis revealed P. stipticus to have a close genetic relationship with members of the genus Mycena.

Panellus stipticus is one of several dozen species of fungi that are bioluminescent. Strains from eastern North America are typically bioluminescent, but those from the Pacific regions of North America and from other continents are not. The luminescence is localized to the edges of the gills and the junction of the gills with the stem and cap. Bioluminescence is also observable with mycelia grown in laboratory culture, and the growth conditions for optimal light production have been studied in detail. Several chemicals have been isolated and characterized that are believed to be responsible for light production. Genetic analysis has shown that luminescence is controlled by a single dominant allele. The luminescent glow of this and other fungi inspired the term foxfire, coined by early settlers in eastern and southern North America. Modern research has probed the potential of P. stipticus as a tool in bioremediation, due to its ability to detoxify various environmental pollutants.

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Lactarius repraesentaneus, commonly known as the northern bearded milkcap, the northern milkcap, or the purple-staining milkcap, is a species of fungus in the family Russulaceae. It has a northerly distribution, and is found in temperate regions of North America and Europe, associated with spruce trees. Distinguishing features of its fruit body include the large orange-yellow cap up to 18 cm (7.1 in) wide, cream to pale yellow gills, and a yellow coarsely-pitted stem that is up to 12 cm (4.7 in) long and 3 cm (1.2 in) thick. Cut fruit bodies ooze a white latex that will stain mushroom tissue lilac to purple. Several chemicals have been isolated and identified from the fruit bodies that can modify the growth of plants, and the mushroom also has antibiotic activity against Staphylococcus aureus. L. repraesentaneus is poisonous, and consumption causes stomach aches.

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Join Wikipedia:WikiProject Fungi or ask on the talk page.
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Credit: JJ Harrison

The white coral fungus, Ramariopsis kunzei, at the Great Smoky Mountains National Park, United States.

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Did you know?

... that Spinellus fusiger is a pin mold that parasitizes several species of mushrooms?
... that the mushrooms Boletus zelleri, B. mirabilis, Suillus americanus, S. brevipes, S. lakei, and Leccinum manzanitae are all examples of edible boletes?
... that application of iron salts will turn a white coral green?
... that despite its name, the edibility of the rhubarb bolete is unknown?
... that the mica cap mushroom has glistening particles on top that are remnants of a universal veil?

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General images - show new batch

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

Image 1Oral candidiasis (from Fungal infection)
Image 2Tinea corporis (from Fungal infection)
Image 3Common puffball (Lycoperdon perlatum) has a glebal hymenium; the interior is white when it is young, but as it matures, the interior becomes brown containing spores (from Mushroom)
Image 4
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 5The blue gills of Lactarius indigo, a milk-cap mushroom (from Mushroom)
Image 6
Lichen covered rocks
(from Marine fungi)
Image 7Phylogenetic and symbiogenetic tree of living organisms, showing a view of the origins of eukaryotes and prokaryotes (from Marine fungi)
Image 8Mushrooms are considered a kind of fungal reproductive organ. (from Mycology)
Image 9Close-up cross section of mushroom. (from Mushroom)
Image 10Neurospora 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 11Boletus edulis, also known as "cep", is an edible wild bolete found in Europe (from Mushroom)
Image 12Ling Zhi-8, an immunomodulatory protein isolated from Ganoderma lucidum (from Medicinal uses of fungi)
Image 13Salmon with fungal disease (from Marine fungi)
Image 14Onychomycosis (from Fungal infection)
Image 15
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 16Agaricus bisporus, one of the most widely cultivated and consumed mushrooms (from Mushroom)
Image 17Morphological diversity of fungi collected from a marine sponge species, Ircinia variabilis (from Marine fungi)
Image 18Chytrid 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 19Amanita 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 20Morchella elata asci viewed with phase contrast microscopy (from Mushroom)
Image 21Amanita jacksonii buttons emerging from their universal veils (from Mushroom)
Image 22Yellow flower pot mushrooms (Leucocoprinus birnbaumii) at various states of development (from Mushroom)
Image 23Pityriasis versicolor (from Fungal infection)
Image 24Psychotropic mushroom Amanita muscaria, commonly known as "fly agaric" (from Mushroom)
Image 25Typical mating fusion of two compatible monokaryons in Basidiomycota (from Mating in fungi)
Image 26Pennate 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 27Morphological characteristics of the caps of mushrooms (from Mushroom)
Image 28Psilocybe zapotecorum, a hallucinogenic mushroom (from Mushroom)
Image 29Ganoderma lingzhi (from Mushroom)
Image 30The red yeast rice fungus, Monascus purpureus, can synthesize three statins. (from Medicinal uses of fungi)
Image 31Fungi within Ascomycota form ascogonium and antheridium with trichogyne bridge (from Mating in fungi)
Image 32Agaricus bisporus mushroom is a cultivated edible mushroom for foods and has many names such as "champignon", " button mushroom", "white mushroom", and " portobello" (from Mushroom)
Image 33
Driftwood
(from Marine fungi)
Image 34Eumycetoma (from Fungal infection)
Image 35There are over 100 psychoactive mushroom species of genus Psilocybe native to regions all around the world. (from Mushroom)
Image 36Young Amanita phalloides "death cap" mushrooms, with a matchbox for size comparison (from Mushroom)
Image 37Culinary mushrooms in a diversity of shapes and colors (from Mushroom)
Image 38Ferula mushroom in Bingöl, Turkey . This is an edible type of mushroom. (from Mushroom)
Image 39Maitake, a polypore mushroom (from Mushroom)
Image 40Fungi within Zygomycota form progametangia with suspensors during mating (from Mating in fungi)
Image 41The photochemistry of vitamin D₂ biosynthesis (from Medicinal uses of fungi)
Image 42A mushroom (probably Russula brevipes) parasitized by Hypomyces lactifluorum resulting in a "lobster mushroom" (from Mushroom)
Image 43
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 44A tinder fungus, Fomes fomentarius (from Mushroom)
Image 45Agaricus bitorquis mushroom emerging through asphalt concrete in summer (from Mushroom)
Image 46Group photograph taken at a meeting of the British Mycological Society in 1913 (from Mycology)