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Like other stinkhorn fungi, ''C.&nbsp;ruber'' [[bioaccumulation|bioaccumulates]] the element [[manganese]]. It has been postulated that this element plays a role in the [[enzyme|enzymatic]] breakdown of the gleba with simultaneous formation of odorous compounds.<ref name=Stijve1997/> A [[elemental analysis|chemical analysis]] of the [[chemical element|elemental]] composition of the gelatinous outer layer, the embryonic receptacle and the gleba showed the gelatinous layer to be richest in [[potassium]], [[calcium]], manganese, and [[iron]]. Calcium stabilizes the [[polysaccharide]] gel, protecting the embryonic receptacle from drying out during the growth of the egg. The elevated concentrations of the other elements (compared to those in the developing receptacle) suggest that the gelatinous layer has a "[[placenta]]-like" function.<ref name=Stijve1997/>
Like other stinkhorn fungi, ''C.&nbsp;ruber'' [[bioaccumulation|bioaccumulates]] the element [[manganese]]. It has been postulated that this element plays a role in the [[enzyme|enzymatic]] breakdown of the gleba with simultaneous formation of odorous compounds.<ref name=Stijve1997/> A [[elemental analysis|chemical analysis]] of the [[chemical element|elemental]] composition of the gelatinous outer layer, the embryonic receptacle and the gleba showed the gelatinous layer to be richest in [[potassium]], [[calcium]], manganese, and [[iron]] ions. Calcium<sup>2+</sup> stabilizes the [[polysaccharide]] gel, protecting the embryonic receptacle from drying out during the growth of the egg. The elevated concentrations of the other elements (compared to those in the developing receptacle) suggest that the gelatinous layer has a "[[placenta]]-like" function.<ref name=Stijve1997/>


[[Pigment]]s responsible for the orange to red colors of the mature fruit bodies have been identified as [[carotene]]s, predominantly [[lycopene]] and [[beta carotene]]. Lycopene is also the main pigment in the closely related fungus ''[[Clathrus archeri]]'', while beta carotene is the predominant pigment in the [[Phallaceae]] species ''[[Mutinus caninus]]'', ''[[Mutinus ravenelii|M.&nbsp;ravenelii]]'', and ''[[Mutinus elegans|M.&nbsp;elegans]]''.<ref name=Fiasson1973/>
[[Pigment]]s responsible for the orange to red colors of the mature fruit bodies have been identified as [[carotene]]s, predominantly [[lycopene]] and [[beta carotene]]. Lycopene is also the main pigment in the closely related fungus ''[[Clathrus archeri]]'', while beta carotene is the predominant pigment in the [[Phallaceae]] species ''[[Mutinus caninus]]'', ''[[Mutinus ravenelii|M.&nbsp;ravenelii]]'', and ''[[Mutinus elegans|M.&nbsp;elegans]]''.<ref name=Fiasson1973/>


==References==
==References==

Revision as of 14:52, 8 February 2011

Clathrus ruber
Scientific classification
Kingdom:
Fungi
Division:
Basidiomycota
Class:
Agaricomycetes
Order:
Phallales
Family:
Phallaceae
Genus:
Clathrus
Species:
C. ruber
Binomial name
Clathrus ruber
P.Micheli ex Pers. (1801)
Synonyms[1][2]

Clathrus flavescens Pers. (1801)
Clathrus cancellatus Tourn. ex Fr. (1823)
Clathrus nicaeensis Barla (1879)
Clathrus ruber var. flavescens (Pers.) Quadr. & Lunghini (1990)

Clathrus ruber is a species of fungus in the stinkhorn family, and the type species of the genus Clathrus. It is commonly known as the latticed stinkhorn, the basket stinkhorn, or the red cage, alluding to the striking fruit bodies that are shaped somewhat like a round or oval hollow sphere with interlaced or latticed branches. Although considered primarily a European species, Clathrus ruber has a widespread distribution that includes northern Africa, Asia, and Australia. It has been introduced to many areas, such as North America, through human activity. The species has been known in the scientific literature since the late 1500s, but was first officially described in 1729.

The fruit body initially appears like a whitish "egg" attached to the ground at the base by cords called rhizomorphs. The egg has a delicate, leathery outer membrane enclosing the compressed lattice that surrounds a layer of olive-green spore-bearing slime called the gleba, which contains high levels of calcium that help protect the developing fruit body during development. As the egg ruptures and the fruit body expands, the gleba is carried upward on the inner surfaces of the spongy lattice, and the egg membrane remains as a volva around the base of the structure. The red fruit body can reach heights of up to 20 cm (7.9 in). The gleba has a fetid odor, somewhat like rotting meat, which attracts flies and other insects to help disperse its spores. Although the edibility of the fungus is not known with certainty, its odor would deter most from consuming it.

Taxonomy, phylogeny, and naming

Micheli's 1729 drawings of C. ruber
Phylogeny and relationships of C. ruber and selected Phallaceae species based on ribosomal DNA sequences.[3]

Although the fungus had been illustrated as early as 1597 in a woodcut in John Gerard's Great Herball,[4] Clathrus ruber was not described scientifically until 1729, by the Italian Pier Antonio Micheli in his Nova plantarum genera iuxta Tournefortii methodum disposita, who used the current scientific name.[5] The species was once referred to by American authors as Clathrus cancellatus L., as they used a system of nomenclature based on the former American Code of Botanical Nomenclature, in which the starting point for naming species was Linnaeus's 1753 Species Plantarum. The International Code for Botanical Nomenclature now uses the same starting date, but names of Gasteromycetes used by Christian Hendrik Persoon in his Synopsis Methodica Fungorum (1801) are sanctioned and cannot be replaced by earlier names. Since Persoon used the specific epithet ruber, the correct name for the species is Clathrus ruber. Several historical names of the fungus are now synonyms: Clathrus flavescens, named by Persoon in 1801;[6] Clathrus cancellatus by Joseph Pitton De Tournefort and published by Elias Fries in 1823;[7] Clathrus nicaeensis, published by Jean Baptiste Barla in 1879;[8] and Clathrus ruber var. flavescens, published by Livio Quadraccia and Dario Lunghini in 1990.[9][10]

Clathrus ruber is the type species of the genus Clathrus, and is part of the group of Clathrus species known as the Laternoid series. Common features uniting this group include the vertical arms of the receptacle (fruit body) that are not joined together at the base, and the spongy structure of the receptacle.[11] According to a molecular analysis published in 2006, out of the about 40 Phallales species used in the study, C. ruber is most closely related to Aseroe rubra, Anthurus archeri, Laternea triscapa, and Clathrus chrysomycelinus.[3]

The generic name Clathrus is derived from Ancient Greek κλειθρον or "lattice", and the specific epithet is Latin ruber, meaning "red".[12] The mushroom is commonly known as the "basket stinkhorn",[13] the "lattice stinkhorn",[14] or the "red cage".[15] It was known to the locals of the Adriatic hinterland in the former Yugoslavia as veštičije srce or vještičino srce, meaning "witch's heart".[16]

Description

Close-up of the spongy latticed "arms", showing the ribbed and wrinkled outer surface, and gleba on the inner surface.

Prior to the opening of the volva, the fruiting body is egg-shaped to roughly spherical, up to 6 cm (2.4 in) in diameter, with a gelatinous interior up to 3 mm (0.1 in) thick. White to grayish in color, it is initially smooth, but develops a network of polygonal marks on the surface prior to opening as the internal structures expand and stretch the peridium taut. The fruit body, or receptacle, bursts the egg open as it expands, and leaves the remains of the peridium as a cup or volva surrounding the base.[17] The receptacle ranges in color from red to bright pink to pale orange, and it is often lighter in color approaching the base. The color appears to be dependent upon the temperature and humidity of the environment.[18] The receptacle consists of a spongy network of "arms" interlaced to make meshes of unequal size. At the top of the receptacle, the arms are up to 1.5 cm (0.6 in) thick, but they taper down to smaller widths near the base. A cross-section of the arm reveals it to be spongy, and made up of one wide inner tube and two indistinct rows of tubes towards the outside. The outer surface of the receptacle is ribbed or wrinkled.[17] There are between 80 and 120 mesh holes in the receptacle.[19] The unusual shape of the receptacle has inspired some creative comparisons: David Arora likened it to a whiffleball,[18] while the German Mycological Association—who named C. ruber the 2011 "Mushroom of the Year"—described it as "like an alien from a science fiction horror film".[20]

A considerable variation in height has been reported for the receptacle, ranging from 8 to 20 cm (3.1 to 7.9 in) tall.[21] The base of the fruit bodies are attached to the substrate by rhizomorphs (thickened cords of mycelia). The dark olive-green to olive-brown, foul-smelling sticky gleba covers the inner surface of the receptacle, except near the base. The fetid odor—described as resembling rotting meat[22][23]—attracts flies, other insects, and, in one report, a scarab beetle (Scarabaeus sacer)[24] that help disperse the spores.[18][25] The putrid odor—and people's reaction to it—have been well-documented. In 1862 Mordecai Cubitt Cooke wrote "it is recorded of a botanist who gathered one for the purpose of drying it for his herbarium, that he was compelled by the stench to rise during the night and cast the offender out the window."[26] American mycologist David Arora called the odor "the vilest of any stinkhorn".[18]

The spores are elongated, smooth, and have dimensions of 4–6 by 1.5–2 µm.[17]Scanning electron microscopy has revealed that C. ruber (in addition to several other Phallales species) has a hilar scar—a small indentation in the surface of the spore where it was previously connected to the basidium via the sterigmata.[27] The basidia (spore-bearing cells) are six-spored.[28]

C. columnatus
C. crispus

Similar species

Clathrus ruber may be distinguished from the closely related tropical species C. crispus by the absence of the corrugated rims which surround each mesh of the C. crispus fruit body.[29] The phylogenetically close species C. chrysomycelinus has a yellow receptacle with arms that are structurally simpler, and its gleba is concentrated on specialized "glebifers" located at the lattice intersections. It is known only from Venezuela to southern Brazil.[17] Clathrus columnatus has a fruit body with two to five long vertical orange or red spongy columns, joined together at the apex.[30]

Edibility and folklore

Various stages of development of C. ruber. Some of the "eggs" have been bisected to show their internal contents.

Although edibility for C. ruber has not been officially documented,[31] its foul smell would dissuade most individuals from consuming it. In general, stinkhorn mushrooms are considered edible when still in the egg stage, and are even considered delicacies in some parts of Europe and Asia, where they are pickled raw and sold in markets as "devil's eggs".[18] However, an 1854 report provides a cautionary tale to those considering consuming the mature fruit body. In 1854, Dr. F. Peyre Porcher, of Charleston, South Carolina, described an account of poisoning caused by the mushroom:

"A young person having eaten a bit of it, after six hours suffered from a painful tension of the lower stomach, and violent convulsions. He lost the use of his speech, and fell into a state of stupor, which lasted for forty-eight hours. After taking an emetic he threw up a fragment of the mushroom, with two worms, and mucus, tinged with blood. Milk, oil, and emollient fomentations, were then employed with success."[32]

British mycologist Donald Dring, in his 1980 monograph on the Clathraceae family, wrote that C. ruber was not regarded highly in southern European folklore. He mentions a case of poisoning following its ingestion, reported by Barla in 1858, and notes that Ciro Pollini reported finding it growing on a human skull in a tomb in a deserted church.[17] According to John Ramsbottom, Gascons consider it a cause of cancer and in other parts of France it is said to produce skin rashes or cause convulsions.[33]

Ecology, habitat, and distribution

Receptacle emerging from the volva

Like most of the species of the Phallales order, Clathrus ruber is saprobic—a decomposer of wood and plant organic matter—and is commonly found fruiting in mulch beds.[34] The fungus grows alone or clustered together near woody debris, in lawns, gardens, and cultivated soil.[31]

Clathrus ruber was originally described from Italy and is native to southern and central continental Europe, Macaronesia (Azores[17] and Canary Islands[35]), North Africa (Algeria), and western Asia (Iran).[17] It is considered a rare species in central Europe,[16] and is listed in the Red data book of Ukraine.[36] It may have extended its range northwards into the British Isles or been introduced in the nineteenth century.[37] It now has a mainly southerly distribution in England and has been recorded from Cornwall,[38] Devon,[39] Dorset, Somerset,[17] the Isle of Wight,[40] Hampshire, Sussex, Surrey, and Middlesex. In Scotland, it has been recorded from Argyll. It is also known from Wales, the Channel Islands,[17] and Ireland.[41] In China, it has been collected from Guangdong, Sichuan, Guizhou, and Tibet.[19]

The fungus is considered a European species and has probably been introduced elsewhere, often because of the use of imported mulch used in gardening and landscaping.[31] It now also occurs in the United States (California, Florida, Georgia, Virginia, North Carolina, and New York),[42] Australasia,[43] Canada, and Mexico. Records from Japan[44] are referable to Clathrus kusanoi; records from the Caribbean are probably of C. crispus.[17]

Biochemistry

Lycopene
Beta-carotene

Like other stinkhorn fungi, C. ruber bioaccumulates the element manganese. It has been postulated that this element plays a role in the enzymatic breakdown of the gleba with simultaneous formation of odorous compounds.[21] A chemical analysis of the elemental composition of the gelatinous outer layer, the embryonic receptacle and the gleba showed the gelatinous layer to be richest in potassium, calcium, manganese, and iron ions. Calcium2+ stabilizes the polysaccharide gel, protecting the embryonic receptacle from drying out during the growth of the egg. The elevated concentrations of the other elements (compared to those in the developing receptacle) suggest that the gelatinous layer has a "placenta-like" function.[21]

Pigments responsible for the orange to red colors of the mature fruit bodies have been identified as carotenes, predominantly lycopene and beta carotene. Lycopene is also the main pigment in the closely related fungus Clathrus archeri, while beta carotene is the predominant pigment in the Phallaceae species Mutinus caninus, M. ravenelii, and M. elegans.[45]

References

  1. ^ "Clathrus ruber P. Micheli ex Pers". Index Fungorum. CAB International. Retrieved 2010-07-03.
  2. ^ "Clathrus ruber P. Micheli ex Pers. 1801". MycoBank. International Mycological Association. Retrieved 2010-07-03.
  3. ^ a b Hosaka K, Bates ST, Beever RE, Castellano MA, Colgan W, Domínguez LS, Nouhra ER, Geml J, Giachini AJ, Kenney SR, Simpson NB, Spatafora JW, Trappe JM. (2006). "Molecular phylogenetics of the gomphoid-phalloid fungi with an establishment of the new subclass Phallomycetidae and two new orders". Mycologia. 98 (6): 949–55. doi:10.3852/mycologia.98.6.949.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  4. ^ Paul D. (1918). "Presidential address. On the earlier study of fungi in Britain". Transactions of the British Mycological Society. 6 (2): 91–103.
  5. ^ Micheli PA. (1729). Nova plantarum genera iuxta Tournefortii methodum disposita (in Latin). Florence, Italy: Typis Bernardi Paperinii. p. 214.
  6. ^ "Clathrus flavescens Pers. 1801". MycoBank. International Mycological Association. Retrieved 2010-07-04.
  7. ^ Fries EM. (1823). Systema Mycologicum (in Latin). Vol. 2. Lundin, Sweden: Ex Officina Berlingiana. p. 288.
  8. ^ "Clathrus nicaeensis Barla". MycoBank. International Mycological Association. Retrieved 2010-07-04.
  9. ^ Quadraccia L, Lunghini D. (1990). "Contributo alla conoscenza dei macromiceti della tenuta Presidenziale di Castelporziano (Micoflora del Lazio II)". Quaderni dell'Accademia Nazionale dei Lincei (in Italian). 264: 49–120. {{cite journal}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  10. ^ "Clathrus ruber var. flavescens(Pers.) Quadr. & Lunghini". MycoBank. International Mycological Association. Retrieved 2010-07-04.
  11. ^ "Clathrus P. Micheli ex L. 1753". MycoBank. International Mycological Association. Retrieved 2010-07-03.
  12. ^ Rea C. (1922). British Basidiomycetes: A Handbook to the Larger British Fungi. Cambridge, UK: Cambridge at the University Press. p. 21.
  13. ^ Phillips R. "Clathrus ruber". Rogers Mushrooms. Rogers Plants Ltd. Retrieved 2010-07-04.
  14. ^ McKnight VB, McKnight KH. (1987). A Field Guide to Mushrooms: North America. Boston: Houghton Mifflin. p. 345. ISBN 0-395-91090-0.
  15. ^ "Recommended English Names for Fungi in the UK" (PDF). British Mycological Society.
  16. ^ a b Ivancevic B, Tatic B. (2003). "First record of Clathrus ruber from Serbia" (PDF). Mycologia Balcanica. 1: 59–60.
  17. ^ a b c d e f g h i j Dring DM. (1980). "Contributions towards a rational arrangement of the Clathraceae". Kew Bulletin. 35 (1): 1–96. doi:10.2307/4117008. JSTOR 4117008 (subscription required).
  18. ^ a b c d e Arora D. (1986). Mushrooms Demystified: a Comprehensive Guide to the Fleshy Fungi. Berkeley, California: Ten Speed Press. p. 765. ISBN 0-89815-169-4.
  19. ^ a b Zhishu B, Zheng G, Taihui L. (1993). The Macrofungus Flora of China's Guangdong Province (Chinese University Press). New York, New Yorl: Columbia University Press. p. 542. ISBN 962-201-556-5.{{cite book}}: CS1 maint: multiple names: authors list (link)
  20. ^ "Pilz des Jahres 2011: Roter Gitterling (Clathrus ruber Pers.)" (in German). Deutsche Gesellschaft für Mykologie. Retrieved 2011-02-07. Diese Kreatur sieht eher aus wie ein Alien aus einem Sciencefictionhorrorfilm.
  21. ^ a b c Stijve T. (1997). "Důvěrné setkání s Clathrus ruber mřížovkou červenou" (PDF abstract (English & Czech)). Česká Mykologie. 50 (1): 63–70. {{cite journal}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  22. ^ Wood M, Stevens F. "Clathrus ruber". California Fungi. Retrieved 2011-02-07.
  23. ^ Jordan M. (2004). The Encyclopedia of Fungi of Britain and Europe. London: Frances Lincoln. p. 366. ISBN 0-7112-2378-5.
  24. ^ Roman J. (2008). "Scarabaeus sacer Linnaeus, 1758 (Coleoptera: Scarabaeidae) visitando un hongo de la especie Clathrus ruber Micheli: Persoon (Clathraceae)". Boletin de la SEA (Sociedad Entomológica Aragonesa) (in Spanish). 42: 348. ISSN 1134-6094. {{cite journal}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  25. ^ Stijve T. (1996). "Stinkhorns in abundance". Coolia (in Dutch). 39 (4): 229–36.
  26. ^ Cooke MC. (1862). A Plain and Easy Account of British Fungi; With Descriptions of the Esculent and Poisonous Species and a Tabular Arrangement of Orders and Genera. London: Robert Hardwicke. p. 93. Retrieved 2010-07-04.
  27. ^ Burk WR, Flegler SL, Hess WM. (1982). "Ultrastructural studies of Clathraceae and Phallaceae (Gasteromycetes) spores". Mycologia. 74 (1): 166–68. doi:10.2307/3792646.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  28. ^ Laessoe T, Pegler DN, Spooner B. (1995). British Puffballs, Earthstars and Stinkhorns: an Account of the British Gasteroid Fungi. Kew: Royal Botanic Gardens. p. 184. ISBN 0-947643-81-8.{{cite book}}: CS1 maint: multiple names: authors list (link)
  29. ^ Dennis RWG. (1954). "Some West Indian Gasteromycetes". Kew Bulletin. 1953: 307–28.
  30. ^ Kuo M. (08-2006). "Clathrus columnatus". MushroomExpert.com. Retrieved 2011-02-07. {{cite web}}: Check date values in: |date= (help)
  31. ^ a b c Kuo M. (08-2006). "Clathrus ruber". MushroomExpert.Com. Retrieved 2011-02-07. {{cite web}}: Check date values in: |date= (help)CS1 maint: date and year (link)
  32. ^ Porcher FP. (1854). "On the medicinal and toxicological properties of the cryptogamic plants of the United States". Transactions of the American Medical Association. 7: 280.
  33. ^ Ramsbottom J. (1953). Mushrooms & Toadstools: A Study of the Activities of Fungi. London: Collins. pp. 187–88.
  34. ^ Miller HR, Miller OK. (1988). Gasteromycetes: Morphological and Developmental Features, with Keys to the Orders, Families, and Genera. Eureka, California: Mad River Press. p. 76. ISBN 0-916422-74-7.
  35. ^ Eckblad F-E. (1975). "Additions and corrections to the Gasteromycetes of the Canary Islands". Norwegian Journal of Botany. 22 (4): 243–48.
  36. ^ Sarkina IS, Prydiuk MP, Heluta VP. (2003). "Macromycetes of Crimea, listed in the red data book of Ukraine". Ukrayins'kyi Botanichnyi Zhurnal (in Ukrainian). 60 (4): 438–46. ISSN 0372-4123.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  37. ^ Dennis RWG. (1955). "The status of Clathrus in England". Kew Bulletin. 10 (1): 101–106. doi:10.2307/4113923. JSTOR 4113923 (subscription required).
  38. ^ Miller GB. (1988). "Clathrus in Cornwall". Mycologist. 2 (1): 17.
  39. ^ Roberts P. (1988). "Clathrus ruber: notes on two collections from Devon". Mycologist. 2 (1): 14–16. doi:10.1016/S0269-915X(88)80115-0.
  40. ^ Hope C. (1989). "Clathrus ruber on the Isle of Wight". Mycologist. 3 (3): 111–12. doi:10.1016/S0269-915X(89)80036-9.
  41. ^ Muskett AE, Malone JP. (1978). "Catalog of Irish Fungi Part 1. Gasteromycetes". Proceedings of the Royal Irish Academy Section B Biological Geological and Chemical Science. 78 (1): 1–12.
  42. ^ Burk WR. (1979). "Clathrus ruber in California USA and worldwide distributional records". Mycotaxon. 8 (2): 463–68.
  43. ^ Cunningham GH. (1931). "The Gasteromycetes of Australasia. XI. The Phallales, part II". Proceedings of the Linnaean Society of New South Wales. 56 (3): 182–200.
  44. ^ Minikata K. (1928). "Clathrus cancellatus TOURNEFORT 本邦二産ス" (PDF). Botanical Magazine (Tokyo) (in Japanese). 42 (496): 243–44. {{cite journal}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  45. ^ Fiasson JL, Petersen RH. (1973). "Carotenes in the fungus Clathrus ruber (Gasteromycetes)". Mycologia. 65 (1): 201–203. doi:10.2307/3757801. PMID 4686215.

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