Pleurotus calyptratus

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Pleurotus calyptratus
2008-05-03 Pleurotus calyptratus 1 24551 cropped.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Pleurotaceae
Genus: Pleurotus
Species:
P. calyptratus
Binomial name
Pleurotus calyptratus
(Lindblad ex Fr.) Sacc.
Synonyms
  • Agaricus calyptratus Lindblad ex Fr. 1857
  • Dendrosarcus calyptratus (Lindblad ex Fr.) Kuntze 1898
  • Pleurotus djamor f. calyptratus (Lindblad ex Fr.) R.H. Petersen 2002
  • Tectella calyptrata (Lindblad ex Fr.) Singer 1943. [1]
Pleurotus calyptratum
Information icon.svg
Gills icon.png Gills on hymenium
Offset cap icon.svg Cap is offset
Decurrent gills icon2.svg Hymenium is decurrent
Transparent spore print icon.svg
Spore print is white
Saprotrophic fungus.svgParasitic fungus.svgEcology is saprotrophic or parasitic
Mycomorphbox Edible.pngEdibility is edible

Pleurotus calyptratus, (syn. Lentodiopsis calyptrata, Tectella calyptrata) is a species of fungus from the family Pleurotaceae. It has a distinctive delicate veil on young fruiting bodies. [2] Phylogenetic research has shown that while it belongs to P. djamor-cornucopiae clade, it forms its own intersterility group. [3]

Contents

Appearance

Macroscopic features

The 2.5-10 cm large fruiting bodies of Pleurotus calyptratus are semicircular, shell-shaped to kidney-shaped. The pileus surface is smooth, wrinkled with age, bald and at least a bit greasy in damp weather. The color spectrum ranges from pale brownish-grey to light grey-blue. Older specimens may fade to cream to whitish. The white, later yellowing, skin-like veil that stretches from the cap edges over the lamellae in young fruiting bodies is striking. The partial velum tears open during growth and ragged remnants get stuck at the edges. The lamellae are densely packed and like to have slightly jagged edges. They are white to cream-colored, yellowish to ocher-brown when old. The white spore powder darkens to a creamy yellow as it dries. The laterally grown stem is either short or absent. The flesh is white in color and does not change color when cut. It smells and tastes pleasantly, sweet like fruit or honey, but also floury. [4] [5]

Microscopic features

The cylindrical to slenderly elliptical spores are 10.5–15.5 µm long, (3)4–5 µm wide and show no iodine color reaction. Cystidia are absent. The lamella trama has a dimitic structure. The 2–3.5 µm wide skeletal hyphae are thick-walled, relatively short, and have neither septa nor clamp connections. [5]

Ecology

Like Pleurotus dryinus, Pleurotus calyptratus parasites the weak - it affects trees weakened by drought or waterlogging. After the host has died, the fungus can continue to feed on the substrate as a saprobiont for some time. It causes intense white rot in the heartwood. The species mainly inhabits trunks, stumps and fallen branches of poplars, especially white and trembling poplars. The fungus is also very rare on willows [6] and rowanberries. [5]

Distribution

The mushroom lives in Europe in the temperate to subarctic climate zones. In Central Europe there are reports of finds from Germany, Croatia, [7] Poland, [8] Liechtenstein, Austria, Slovakia, Czech Republic and Hungary. In northern Europe, the species has so far only been found in Finland and Sweden. In Germany, only isolated finds from the southern federal states of Bavaria and Baden-Württemberg are known. [6]

It is recognized on the lists of endangered species in Poland, Sweden and Finland. [8]

The fungus has not established itself in Baden-Württemberg. It was able to benefit little from the spread of the trembling poplar, planted by humans as soil-preparing forest pioneers after World War II. Since the tree was no longer promoted, the Pleurotus calyptratus has been doomed to extinction. However, protective measures are considered to be of little use. [2]

Economical meaning

Pleurotus calyptratus is an edible mushroom, [9] as a tree and wood parasite it is insignificant due to its rarity.

Sources

Literature

Related Research Articles

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References

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  2. 1 2 Die Großpilze Baden-Württembergs / 3, Ständerpilze: Blätterpilze I / Autoren des Bandes 3: Andreas Gminder, German J. Krieglsteiner unter Mitarb. von Armin Kaiser. Andreas Gminder, German J. Krieglsteiner. Stuttgart: Ulmer. 2001. p. 24. ISBN   3-8001-3536-1. OCLC   313988076.{{cite book}}: CS1 maint: others (link)
  3. Vilgalys, R.; Moncalvo, J.M.; Liou, S.R.; Volovsek, M. (1996). "Recent advances in molecular systematics of the genus Pleurotus" (PDF). In Royse, D.J. (ed.). Mushroom biology and mushroom products: proceedings of the 2nd International Conference, June 9–12, 1996. University Park, PA (USA): Pennsylvania State University: World Society for Mushroom Biology and Mushroom Products. pp. 91–101. Archived from the original (PDF) on 2011-09-02. Retrieved 2011-03-10.
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