Amanita abrupta

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Amanita abrupta
Amanita abrupta 54083.jpg
A young specimen
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Amanitaceae
Genus: Amanita
Species:
A. abrupta
Binomial name
Amanita abrupta
Peck (1897)
Synonyms [1]
  • Lepidella abrupta(Peck) J.-E.Gilbert (1928) [2]
  • Aspidella abrupta(Peck) J.-E.Gilbert (1940) [3]
Amanita abrupta
Information icon.svg
Gills icon.png Gills on hymenium
Convex cap icon.svgFlat cap icon.svg Cap is convex or flat
Free gills icon2.svg Hymenium is free
Ring and volva stipe icon.svg Stipe has a ring and volva
Transparent spore print icon.svg
 Spore print is white
Mycorrhizal fungus.svgEcology is mycorrhizal
Mycomorphbox Poison.pngMycomorphbox Question.pngEdibility is poisonous or unknown

Amanita abrupta, commonly known as the American abrupt-bulbed amanita [4] or the American abrupt-bulbed lepidella, is a possibly toxic species of fungus in the family Amanitaceae. Named for the characteristic shape of its fruit bodies, this white Amanita has a slender stem, a cap covered with conical white warts, and an "abruptly enlarged" swollen base. This terrestrial species grows in mixed woods in eastern North America and eastern Asia, where it is thought to exist in a mycorrhizal relationship with a variety of both coniferous and deciduous tree species.

Contents

Taxonomy

A. abrupta was first described by American mycologist Charles Horton Peck in 1897, based on a specimen he found in Auburn, Alabama. Because the remains of the volva are not present on the bulb in dried, mature, specimens, Peck thought that the species should be grouped with Amanita rubescens and A. spissa . [5] Synonyms include binomials resulting from generic transfers by Jean-Edouard Gilbert to Lepidella in 1928, and to Aspidella in 1940. [1] Both of these genera have since been subsumed into Amanita. [6]

A. abrupta is the type species of the section Lepidella of the genus Amanita, in the subgenus Lepidella, a grouping of related Amanita mushrooms characterized by their amyloid spores. [7] Other North American species in this subgenus include A. atkinsoniana , A. chlorinosma , A. cokeri , A. daucipes , A. mutabilis , A. onusta , A. pelioma , A. polypyramis , A. ravenelii , and A. rhopalopus . [8] European and Asian species (also in section Lepidella) that are phylogenetically related—close to it in the evolutionary family tree—include A. solitaria , A. virgineoides , and A. japonica . [9]

The specific epithet abrupta refers to the shape of the swollen base, which is abruptly enlarged rather than gradually tapering. [10] The species' common name is the "American abrupt-bulbed Lepidella". [11]

Description

The ring on the stem is prominent in mature specimens. Amanita abrupta 49115.jpg
The ring on the stem is prominent in mature specimens.

As with most mushrooms, the bulk of A. abrupta lies beneath the ground as an aggregation of fungal cells called hyphae; under appropriate environmental conditions, the visible reproductive structure (fruit body) is formed. The cap has a diameter of 4 to 10 centimeters (1+1⁄2 to 4 inches), and has a broadly convex shape when young, but eventually flattens. [11] The central portion of the cap becomes depressed in mature specimens. [11] The cap surface is verrucose—covered with small angular or pyramidal erect warts (1–2 mm tall by 1–2 mm wide at the base); [11] the warts are smaller and more numerous near the margin of the cap, [12] and small fragments of tissue may be hanging from the margin of the cap. [13] The cap surface, the warts, and the flesh are white. The warts can be easily separated from the cap, and in mature specimens they have often completely or partly disappeared. [5] The white gills are placed moderately close together, reaching the stem but not directly attached to it.

The stem is 6.5 to 12.5 cm (2+1⁄2 to 5 in) tall, and slender, with a diameter of 0.5 to 1.5 cm (1⁄4 to 1⁄2 in). [10] It is white, smooth (glabrous), solid (that is, not hollow internally), and has an abruptly bulbous base with the shape of a flattened sphere; it may develop longitudinal splits on the sides. The base is often attached to a copious white mycelium—a visual reminder that the bulk of the organism lies unseen below the surface. The ring is membranous, and persistent—not weathering away with time; [5] the ring may be attached to the stem with white fibers. [12] The mushroom has no distinct odor. [14]

Microscopic characteristics

The spores of A. abrupta are broadly elliptical or roughly spherical. Amanita abrupta spores 59705.jpg
The spores of A. abrupta are broadly elliptical or roughly spherical.

When collected in deposit, such as with a spore print, the spores appear white. Viewed with a microscope, the spores are broadly elliptical or roughly spherical, smooth, thin-walled, and have dimensions of 6.5–9.5 by 5.5 by 8.5  µm. Spores are amyloid (meaning they take up iodine when stained with Melzer's reagent) [15] The basidia (spore-bearing cells on the edges of gills) are four-spored and measure 30–50 by 4–11 µm. The bases of the basidia have clamp connections—short branches connecting one cell to the previous cell to allow passage of the products of nuclear division. The cap cuticle comprises a layer of densely interwoven, sightly gelatinized, filamentous hyphae that are 3–8 µm in diameter. The stem tissue is made of sparse, thin, longitudinally oriented hyphae measuring 294 by 39 µm. [16]

Similar species

The fruit bodies of Amanita kotohiraensis , a species known only from Japan, bears a superficial resemblance to A. abrupta, but A. kotohiraensis differs in having scattered floccose patches (tufts of soft woolly hairs that are the remains of the volva) on the cap surface, and pale yellow gills. [17] A. polypyramis fruit bodies have also been noted to be similar to A. abrupta; [14] however, it tends to have larger caps, up to 21 cm (8.3 in) in diameter, a fragile ring that soon withers away, and somewhat larger spores that typically measure 9–14 by 5–10 µm. [18] The amyloidity and size of the spores are reliable characteristics to help distinguish A. abrupta specimens with less prominently bulbous bases from other lookalike species. [12]

Mycologists Tsuguo Hongo and Rokuya Imazeki suggested in the 1980s that the Japanese mushroom A. sphaerobulbosa was synonymous with the North American A. abrupta. [19] [20] However, a 1999 study of Amanita specimens in Japanese herbaria concluded that they were closely related but distinct species, due to differences in spore shape and in the microstructure of the volval remnants. [21] Another similar species, A. magniverrucata , is differentiated from A. abrupta by a number of characteristics: the universal veil is clearly separated from the flesh of the cap; the volval warts disappear more quickly because the surface of the cap cuticle gelatinizes; the partial veil is more persistent; the spores are smaller and roughly spherical; on the underside of the partial veil, the stem has surface fibrils that are drawn upward so as to somewhat resemble a cortina (a cobweb-like protective covering over the immature spore bearing surfaces); A. magniverrucata has a known distribution limited to the south western coast of North America. [22]

Distribution and habitat

The fruit bodies of A. abrupta grow on the ground, typically solitary, in mixed conifer and deciduous forests, [10] usually during autumn. [16] The frequency with which fruit bodies appear depends on several factors, such as season, location, temperature, and rainfall. The mushroom has been described as common in the Southeastern United States; [23] in Texas, it has been called both infrequent, [10] and common in the Big Thicket National Preserve. [24] Like most other Amanita species, A. abrupta is thought to form mycorrhizal relationships with trees. This is a mutually beneficial relationship where the hyphae of the fungus grow around the roots of trees, enabling the fungus to receive moisture, protection and nutritive byproducts of the tree, and affording the tree greater access to soil nutrients. [25] A. abrupta is widely distributed throughout eastern North America, [10] where it has been found as far north as Quebec, Canada, [26] and as far south as Mexico. [27] Orson K. Miller claims to have found it in the Dominican Republic where it appeared to be growing in a mycorrizhal association with pine trees. [14] Kuo also mentions a mycorrhizal relationship with both hardwoods and conifers, [12] while Tulloss lists additional preferred tree hosts such as beech, birch, fir, tsuga, oak, and poplar. [11] However, A. abrupta has been shown experimentally to not form mycorrhizae with Virginia Pine. [28]

Toxicity

The mushroom is considered inedible; [29] it is generally not recommended to consume Amanita mushrooms as some are very deadly. [13]

Pharmacology

Animal test based studies (mice) with aqueous extracts of A. abrupta have demonstrated hepatotoxic effects. [30] 2-Amino-4,5-hexadienoic acid is associated with these effects. [31]

See also

Related Research Articles

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<i>Amanita brunnescens</i> Species of fungus

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<i>Amanita arocheae</i> Species of fungus

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<i>Amanita persicina</i> Species of fungus

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<i>Amanita flavoconia</i> Species of fungus

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<i>Amanita vaginata</i> Species of fungus

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<i>Amanita daucipes</i> Species of fungus

Amanita daucipes is a species of fungus in the family Amanitaceae of the mushroom order Agaricales. Found exclusively in North America, the mushroom may be recognized in the field by the medium to large white caps with pale orange tints, and the dense covering of pale orange or reddish-brown powdery conical warts on the cap surface. The mushroom also has a characteristic large bulb at the base of its stem with a blunt short rooting base, whose shape is suggestive of the common names carrot-footed lepidella, carrot-foot amanita, or turnip-foot amanita. The mushroom has a strong odor that has been described variously as "sweet and nauseous", or compared to an old ham bone, or soap. Edibility is unknown for the species, but consumption is generally not recommended due its position in the Amanita subgroup Lepidella, which contains some poisonous members.

<i>Amanita onusta</i> Species of fungus

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<i>Amanita aestivalis</i> Species of fungus

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<i>Amanita exitialis</i> Species of fungus

Amanita exitialis, also known as the Guangzhou destroying angel, is a mushroom of the large genus Amanita. It is distributed in eastern Asia, and probably also in India where it has been misidentified as A. verna. Deadly poisonous, it is a member of section Phalloideae and related to the death cap A. phalloides. The fruit bodies (mushrooms) are white, small to medium-sized with caps up to 7 cm (2.8 in) in diameter, a somewhat friable ring and a firm volva. Unlike most agaric mushrooms which typically have four-spored basidia, the basidia of A. exitialis are almost entirely two-spored. Eight people were fatally poisoned in China after consuming the mushroom in 2000, and another 20 have been fatally poisoned since that incident. Molecular analysis shows that the species has a close phylogenetic relationship with three other toxic white Amanitas: A. subjunquillea var. alba, A. virosa and A. bisporigera.

<i>Amanita australis</i> Species of fungus

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<i>Amanita nothofagi</i> Species of fungus

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<i>Amanita atkinsoniana</i> Species of fungus

Amanita atkinsoniana, also known as the Atkinson's amanita, is a species of fungus in the family Amanitaceae. The fruit body is white to brownish, with caps up to 12.5 centimetres in diameter, and stems up to 20 cm long. The surface of the cap is covered with brownish conical warts.

<i>Amanita ravenelii</i> Species of fungus

Amanita ravenelii, commonly known as the pinecone lepidella, is a species of fungus in the family Amanitaceae. The whitish fruit bodies are medium to large, with caps up to 17 centimetres wide, and stems up to 25 cm (10 in) long. The cap surface has large warts and the stem has a scaly, bulbous base. The mushrooms have a unique chlorine like odor.

<i>Amanita rubrovolvata</i> Species of fungus

Amanita rubrovolvata, commonly known as the red volva amanita, is a species of fungus in the family Amanitaceae. The fungus produces small to medium-sized mushrooms, with reddish-orange caps up to 6.5 millimetres wide. The stems are up to 10 cm (4 in) tall, cream-coloured above the ring and cream to yellowish below it. The stem ends in a roughly spherical bulb at the base, which is covered with bright orange patches.

<i>Saproamanita thiersii</i> Species of fungus

Saproamanita thiersii, commonly called Thiers' lepidella, is a North American saprotrophic basidiomycete fungus in the genus Saproamanita. It is a white, small mushroom. Its cap is convex, measuring 3.5–10 centimetres across, and the stipe is 8–20 cm (3–8 in) long. The spore print is white.

<i>Amanita ceciliae</i> Species of fungus

Amanita ceciliae, commonly called snakeskin grisette, strangulated amanita, and the Cecilia's ringless amanita, is a basidiomycete fungus in the genus Amanita. First described in 1854 by Miles Joseph Berkeley and Christopher Edmund Broome, it was given its current name by Cornelis Bas in 1984. It is characterized by bearing a large fruit body with a brown cap 5–12 cm (2.0–4.7 in) across. The cap has charcoal-grey patches, which are easily removable. The stipe is 7–18 cm (2.8–7.1 in) long, white in colour, and there is no ring on it. It is slightly tapered to the top, and has irregular cottony bands girdling the base. The universal veil is grey. Spores are white, spherical in shape, non-amyloid, and measure 10.2–11.7 micrometres. The mushrooms are considered edible, but field guides typically advise caution in selecting them for consumption, due to risks of confusion with similar toxic species. A. ceciliae is found in woods throughout Europe and North America, where it fruits during summer and autumn.

<i>Amanita albocreata</i> Species of fungus

Amanita albocreata, also called the ringless panther or the ringless panther amanita, is a species of fungus in the family Amanitaceae. It was discovered in 1944, by William Murrill. It is commonly found in the northeastern United States and parts of southeastern Canada. It normally grows between the rainy months of June and August.

<i>Amanita sphaerobulbosa</i> Species of fungus

Amanita sphaerobulbosa, commonly known as the Asian abrupt-bulbed Lepidella, is a species of agaric fungus in the family Amanitaceae. First described by mycologist Tsuguo Hongo in 1969, it is found in Southern Asia.

References

  1. 1 2 "Amanita abrupta Peck 1897". MycoBank. International Mycological Association. Retrieved 2012-11-08.
  2. ↑ Gilbert, J.-E.; Kühner, R. (1928). "Recherches sur les spores des amanites". Bulletin de la Société Mycologique de France (in French). 44: 149–154.
  3. ↑ Gilbert, J.-E. (1940). "Iconographia mycologica, Amanitaceae". Iconographia Mycologica. 27: 1–198 (see p. 79).
  4. ↑ "Standardized Common Names for Wild Species in Canada". National General Status Working Group. 2020.
  5. 1 2 3 Peck, C.H. (1897). "New species of fungi". Bulletin of the Torrey Botanical Club. 24 (3): 137–147. doi:10.2307/2477879. JSTOR   2477879.
  6. ↑ Kirk, P.M.; Cannon, P.F.; Minter, D.W.; Stalpers, J.A. (2008). Dictionary of the Fungi (10th ed.). Wallingford, UK: CAB International. pp. 63, 369. ISBN   978-0-85199-826-8.
  7. ↑ Tulloss, R.E. "Sections of Amanita". Studies in the Amanitaceae. Retrieved 2011-02-11.
  8. ↑ Bhatt, R.P.; Miller, O.K. Jr] (2004). "Amanita subgenus Lepidella and related taxa in the southeastern United States". In Cripps, C.L. (ed.). Fungi in Forest Ecosystems: Systematics, Diversity, and Ecology. New York Botanical Garden Press. pp. 33–59. ISBN   978-0-89327-459-7.
  9. ↑ Zhang, L.; Yang, J.; Zhuliang, Y. (2004). "Molecular phylogeny of eastern Asian species of Amanita (Agaricales, Basidiomycota): taxonomic and biogeographic implications" (PDF). Fungal Diversity. 17: 219–238.
  10. 1 2 3 4 5 Metzler and Metzler (1992), p. 64.
  11. 1 2 3 4 5 Tulloss, R.E. "Amanita abrupta". Studies in the Amanitaceae. Retrieved 2011-02-11.
  12. 1 2 3 4 Kuo, M. (August 2003). "Amanita abrupta". MushroomExpert.Com. Retrieved 2009-08-18.
  13. 1 2 Phillips, R. (2005). Mushrooms and Other Fungi of North America. Buffalo, New York: Firefly Books. p. 27. ISBN   1-55407-115-1.
  14. 1 2 3 Miller, H.R.; Miller, O.K. (2006). North American Mushrooms: A Field Guide to Edible and Inedible Fungi. Guilford, Connecticut: Falcon Guide. p. 43. ISBN   0-7627-3109-5.
  15. ↑ Metzler and Metzler (1992), p. 331.
  16. 1 2 Jenkins (1986), p. 77.
  17. ↑ Nagasawa, E.; Mitani, S. (2000). "A new species of Amanita section Lepidella from Japan". Memoirs of the National Science Museum (Tokyo). 32: 93–97.
  18. ↑ Kuo, M. (March 2008). "Amanita polypyramis". MushroomExpert.Com. Retrieved 2009-08-19.
  19. ↑ Hongo, T. (1982). "The Amanitas of Japan". Acta Phytotaxonomica et Geobotanica (in Japanese). 33: 116–126.
  20. ↑ Imazeki, R.; Hongo, T. (1987). Colored Illustrations of Mushrooms of Japan. Vol. 1. Osaka, Japan: Hoikusha Publishing.
  21. ↑ Yang, Z.-L.; Doi, Y. (1999). "A contribution to the knowledge of Amanita (Amanitaceae, Agaricales) in Japan". Bulletin of the National Science Museum of Tokyo Series B. 25 (3): 107–130.
  22. ↑ Tulloss, R. (2009). "Amanita magniverrucata—revision of an interesting species of Amanita section Lepidella". Mycotaxon. 108: 93–104. doi: 10.5248/108.93 .
  23. ↑ Bessette, A.E.; Roody, W.C.; Bessette, A.R. (2007). Mushrooms of the Southeastern United States. Syracuse, New York: Syracuse University Press. p. 104. ISBN   978-0-8156-3112-5.
  24. ↑ Lewis, D.P.; McGraw, J.L. Jr (1981). "Agaricales, family Amanitaceae, of the Big Thicket". The Southwestern Naturalist. 26 (1): 1–4. doi:10.2307/3671322. JSTOR   3671322.
  25. ↑ Jenkins (1986), p. 5.
  26. ↑ "Liste des Macromycètes – Outaouais Québec 1984—2006" (PDF) (in French). Les mycologues amateurs de l'Outaouais. Archived from the original (PDF) on 2009-09-02. Retrieved 2009-08-18.
  27. ↑ Ortigoza, C.J.A. (2001). Guía micológica del género amanita del Parque Estatal Sierra de Nanchititla. Volume 4 of Cuadernos de investigación (in Spanish). UAEMEX. pp. 20–1. ISBN   978-968-835-546-6.
  28. ↑ Vozzo, J.A.; Hackskaylo, E. (1961). "Mycorrhizal fungi on Pinus virginiana". Mycologia . 53 (5): 538–539. doi:10.2307/3756310. JSTOR   3756310. Archived from the original on 2015-09-23. Retrieved 2012-11-09.
  29. ↑ Phillips, Roger (2010). Mushrooms and Other Fungi of North America. Buffalo, NY: Firefly Books. p. 27. ISBN   978-1-55407-651-2.
  30. ↑ Fukuhara et al.: Hepatotoxic action of a poisonous mushroom, Amanita abrupta in mice and its toxic component, Toxicology, 1986.
  31. ↑ Pubchem Open Chemistry Database: 2-Amino-4,5-hexadienoic acid (2017-07-01)

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