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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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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Coprinellus impatiens is a species of fungus in the family Psathyrellaceae. First described in 1821, it has been classified variously in the genera Psathyrella, Pseudocoprinus, Coprinarius, and Coprinus, before molecular phylogenetics reaffirmed it as a Coprinellus species in 2001. The fungus is found in North America and Europe, where the mushrooms grow on the ground in deciduous forests. The fruit bodies have buff caps that are up to 4 cm (1.6 in) in diameter, held by slender whitish stems that can be up to 10 cm (3.9 in) tall. Several other Coprinopsis species that resemble C. impatiens may be distinguished by differences in appearance, habit, or spore morphology.

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Credit: Dan Molter

The gills of Lactarius indigo, showing the distinctive blue coloration.

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Did you know?

... that the Golden-scruffy Collybia mushroom has been placed in 14 different genera?
... that although it produces its spores on gills, the mushroom Panus conchatus is more closely related to species with pores?
... that the spring orange peel fungus infects caches of pinecones collected by squirrels?
... that the lime-green waxy cap has a limited geographical distribution, having been collected only in California and Mexico?
... that Devil's Urn is a harbinger of spring?

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General images - show new batch

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

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