Auricularia cornea

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Auricularia cornea
Auricularia cornea (Wellington, New Zealand).jpg
Auricularia cornea, New Zealand
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Auriculariales
Family: Auriculariaceae
Genus: Auricularia
Species:
A. cornea
Binomial name
Auricularia cornea
Ehrenb. (1820)
Synonyms
  • Exidia cornea(Ehrenb.) Fr. (1822)
  • Hirneola cornea (Ehrenb.) Fr. (1848)

Auricularia cornea, also known as cloud ear, is a species of fungus in the order Auriculariales. It is commercially cultivated for food in China. Auricularia cornea is a popular ingredient in many Chinese dishes and is also used in traditional Chinese medicine.

Contents

Taxonomy

Auricularia cornea was originally described from Hawaii (Oahu) by German naturalist Christian Gottfried Ehrenberg in 1820. It was accepted as a distinct species by Bernard Lowy in his 1952 world monograph of Auricularia [1] and subsequently confirmed as distinct by molecular research, based on cladistic analysis of DNA sequences. [2]

Formerly, Auricularia cornea was often misidentified as A. polytricha. [3] That species was originally described from the Eastern Ghats in India by French mycologist Camille Montagne in 1834, and is now considered as a synonym of A. nigricans . [2] The misidentification remains widespread, at least in Japan. [4]

Vernacular names

The species is one of several gelatinous fungi known as wood ear , wood fungus, ear fungus, or tree ear fungus, which alludes to their rubbery, ear-shaped fruitbodies. [5]

In Hawaii, it is known as pepeiao which means "ear" [6] In Chinese cooking, it is often referred to as "black treasure". [7] In New Zealand, it is known as hakeke by Māori. [8] [5]

Description

Fruit bodies solitary or clustered, ear-shaped, laterally attached to wood, sometimes by a very short stalk, elastic, gelatinous, pale brown to reddish brown, rarely white, up to 90 millimetres (3+12 inches) wide and 2 mm thick. The upper surface is densely hairy and the lower surface is smooth. Microscopically, the hairs on the upper surface are thick-walled, 180–425 × 6–9 μm. The basidia are cylindrical, hyaline, three-septate, 60–75 × 4–6 μm. The spores are hyaline, allantoid (sausage-shaped), and 14–16.5 × 4.5–6 μm. [3]

Habitat and distribution

Auricularia cornea grows on dead fallen or standing wood of broadleaf trees. The species is widely distributed in southern Asia, Africa, Australasia and the Pacific, and South America. [2] [3]

Uses

100 g of dry cloud ear fungus contains 70.1 g of dietary fibre. [9]

Auricularia cornea is usually sold in dried form, and needs to be soaked in water before use.[ citation needed ] While almost tasteless, it is prized for its slippery but slightly crunchy texture, and its potential nutritional benefits. [10] The slight crunchiness persists despite most cooking processes. [11] Auricularia cornea is coarser than A. heimuer , and is more likely to be used in soups rather than stir fries. [12]

Māori traditionally cooked wood ear fungus by steaming in an earth oven and eating with sow thistle and potatoes. [13] From the 1870s to the 1950s, the fungus was collected and exported from New Zealand to China. [8] [5] The white, unpigmented form is now cultivated in China. [3] [14]

According to Chinese medicine practitioners, eating dried and cooked wood ear can have health benefits for people with high blood pressure or cancer, and can prevent coronary heart disease and arteriosclerosis. [7]

This fungus is used in Cantonese desserts.

See also

Related Research Articles

<span class="mw-page-title-main">Jelly fungus</span> Group of fungi

Jelly fungi are a paraphyletic group of several heterobasidiomycete fungal orders from different classes of the subphylum Agaricomycotina: Tremellales, Dacrymycetales, Auriculariales and Sebacinales. These fungi are so named because their foliose, irregularly branched fruiting body is, or appears to be, the consistency of jelly. Actually, many are somewhat rubbery and gelatinous. When dried, jelly fungi become hard and shriveled; when exposed to water, they return to their original form.

<span class="mw-page-title-main">Phallaceae</span> Family of fungi

Phallaceae is a family of fungi, commonly known as stinkhorns, within the order Phallales. Stinkhorns have a worldwide distribution, but are especially prevalent in tropical regions. They are known for their foul-smelling, sticky spore masses, or gleba, borne on the end of a stalk called the receptaculum. The characteristic fruiting-body structure, a single, unbranched receptaculum with an externally attached gleba on the upper part, distinguishes the Phallaceae from other families in the Phallales. The spore mass typically smells of carrion or dung, and attracts flies, beetles and other insects to help disperse the spores. Although there is great diversity in body structure shape among the various genera, all species in the Phallaceae begin their development as oval or round structures known as "eggs". The appearance of Phallaceae is often sudden, as gleba can erupt from the underground egg and burst open within an hour. According to a 2008 estimate, the family contains 21 genera and 77 species.

<i>Tremella fuciformis</i> Species of edible fungus

Tremella fuciformis is a species of fungus; it produces white, frond-like, gelatinous basidiocarps. It is widespread, especially in the tropics, where it can be found on the dead branches of broadleaf trees. This fungus is commercially cultivated and is one of the most popular fungi in the cuisine and medicine of China. T. fuciformis is commonly known as snow fungus, snow ear, silver ear fungus, white jelly mushroom, and white cloud ears.

<span class="mw-page-title-main">Wood ear</span> Index of fungi with the same common name

Wood-ear or tree ear, also translated wood jellyfish or tree jellyfish, can refer to a few similar-looking edible fungi used primarily in Chinese cuisine; these are commonly sold in Asian markets shredded and dried.

<span class="mw-page-title-main">Auriculariales</span> Order of fungi

The Auriculariales are an order of fungi in the class Agaricomycetes. Species within the order were formerly referred to the "heterobasidiomycetes" or "jelly fungi", since many have gelatinous basidiocarps that produce spores on septate basidia. Around 200 species are known worldwide, placed in six or more families, though the status of these families is currently uncertain. All species in the Auriculariales are believed to be saprotrophic, most growing on dead wood. Fruit bodies of several Auricularia species are cultivated for food on a commercial scale, especially in China.

<span class="mw-page-title-main">Auriculariaceae</span> Family of fungi

The Auriculariaceae are a family of fungi in the order Auriculariales. Species within the family were formerly referred to the "heterobasidiomycetes" or "jelly fungi", since many have gelatinous basidiocarps that produce spores on septate basidia. Around 100 species are known worldwide. All are believed to be saprotrophic, most growing on dead wood. Fruit bodies of several Auricularia species are cultivated for food on a commercial scale, especially in China.

<i>Auricularia</i> Genus of fungi

Auricularia is a genus of fungi in the family Auriculariaceae. Basidiocarps are typically gelatinous and ear-shaped, with a slightly downy to conspicuously hirsute upper surface and an under surface that is smooth, wrinkled or veined. All species grow on wood. Several Auricularia species are edible and commercially cultivated on a large scale in China and East Asia.

<i>Exidia glandulosa</i> Species of fungus

Exidia glandulosa, commonly known as black witches' butter, black jelly roll, or warty jelly fungus, is a jelly fungus in the family Auriculariaceae. It is a common, wood-rotting species in Europe, typically growing on dead attached branches of oak. The fruit bodies are up to 3 cm (1.2 in) wide, shiny, black and blister-like, and grow singly or in clusters. Its occurrence elsewhere is uncertain because of confusion with the related species, Exidia nigricans.

<i>Ascocoryne sarcoides</i> Species of fungus

Ascocoryne sarcoides is a species of fungus in the family Helotiaceae. The species name is derived from the Greek sarkodes (fleshy). Formerly known as Coryne sarcoides, its taxonomical history has been complicated by the fact that it may adopt both sexual and asexual forms. Colloquially known as jelly drops or the purple jellydisc, this common fungus appears as a gelatinous mass of pinkish or purple-colored discs. Distributed widely in North America, Eurasia, and Oceania, A. sarcoides is a saprobic fungus and grows in clusters on the trunks and branches of a variety of dead woods. Field studies suggest that colonization by A. sarcoides of the heartwood of black spruce confers some resistance to further infection by rot-causing fungi. A. sarcoides contains the antibiotic compound ascocorynin, shown in the laboratory to inhibit the growth of several gram-positive bacteria.

<i>Guepinia</i> Genus of fungi

Guepinia is a genus of fungus in the Auriculariales order. It is a monotypic genus, containing the single species Guepinia helvelloides, commonly known as the apricot jelly. The fungus produces salmon-pink, ear-shaped, gelatinous fruit bodies that grow solitarily or in small tufted groups on soil, usually associated with buried rotting wood. The fruit bodies are up to 10 cm (4 in) tall and up to 17 cm wide; the stalks are not well-differentiated from the cap. It has a white spore deposit, and the oblong to ellipsoid spores measure 9–11 by 5–6 micrometers.

<i>Myxarium nucleatum</i> Species of fungus

Myxarium nucleatum is a species of fungus in the family Hyaloriaceae. In the UK, it has been given the recommended English name of crystal brain. The fruit bodies are watery white, pustular or lobed, and gelatinous with small, white, mineral inclusions visible to the naked eye. It is a common, wood-rotting species in Europe, typically growing on dead attached or fallen branches of broadleaf trees. It is currently not clear whether collections from North America and elsewhere represent the same species.

<i>Peniophora quercina</i> Species of fungus

Peniophora quercina is a species of wood-decay fungus in the family Peniophoraceae. It produces fruit bodies that vary in appearance depending on whether they are wet or dry. The wet fruit bodies are waxy and lilac, and attached strongly to the wood on which they grow. When dry, the edges curl up and reveal the dark underside, while the surface becomes crusty and pink. P. quercina is the type species of the genus Peniophora, with the species being reclassified as a member of the genus upon the latter's creation by Mordecai Cubitt Cooke. P. quercina is found primarily in Europe, where it can be encountered all year. Though primarily growing upon dead wood, especially oak, it is also capable of growing upon still-living wood.

<i>Pholiota nubigena</i> Species of fungus

Pholiota nubigena, commonly known as the gastroid pholiota or the bubble gum fungus, is a species of secotioid fungus in the family Strophariaceae. It is found in mountainous areas of the western United States, where it grows on rotting conifer wood, often fir logs. It fruits in spring, often under snow, and early summer toward the end of the snowmelt period in high mountain forests. Fruit bodies appear similar to unopened mushrooms, measuring 1–4 centimetres tall with 1–2.4 cm diameter caps that are whitish to brownish. They have a short but distinct whitish stipe that extend through the internal spore mass (gleba) of the fruit body into the cap. The gleba consists of irregular chambers made of contorted gills that are brownish in color. A whitish, cottony partial veil is present in young specimens, but it often disappears in age and does not leave a ring on the stipe.

<i>Auricularia auricula-judae</i> Species of fungus

Auricularia auricula-judae, commonly known as wood ear, jelly ear, or more historically, Jew's ear, is a species of fungus in the order Auriculariales. Basidiocarps are brown, gelatinous, and have a noticeably ear-like shape. They grow on wood, especially elder. The specific epithet is derived from the belief that Judas Iscariot hanged himself from an elder tree.

<i>Auricularia nigricans</i> Species of fungus

Auricularia nigricans is a species of fungus in the family Auriculariaceae. Basidiocarps (fruitbodies} are gelatinous, ear-like, and grow on dead wood of broadleaf trees. It is found in southern and eastern Asia, North America, South America and the Caribbean. Asian examples were formerly considered as a separate species described as Auricularia polytricha.

<i>Auricularia americana</i> Species of fungus

Auricularia americana is a species of fungus in the family Auriculariaceae found in North America and East Asia. Its basidiocarps (fruitbodies) are gelatinous, ear-like, and grow on dead conifer wood.

<i>Auricularia angiospermarum</i> Species of fungus

Auricularia angiospermarum is a species of fungus in the family Auriculariaceae. Basidiocarps (fruitbodies) are gelatinous, ear-like, and grow on dead wood of broadleaf trees. It is a North American species and was formerly confused with Auricularia auricula-judae which is confined to Europe.

<i>Auricularia heimuer</i> Species of fungus

Auricularia heimuer, also known as heimuer or black wood ear, is a species of fungus in the order Auriculariales. It is commercially cultivated for food in China at a value exceeding $4 billion (USD) per year. The species was previously referred to as the European Auricularia auricula-judae, but the latter is not known to occur in east Asia. Auricularia heimuer is a popular ingredient in many Chinese dishes, such as hot and sour soup, and it is also used in traditional Chinese medicine.

<i>Auricularia mesenterica</i> Species of fungus

Auricularia mesenterica, commonly known as the tripe fungus, is a species of fungus in the family Auriculariaceae. Basidiocarps are gelatinous and typically formed in coalescing tiers on stumps and logs. They are partly pileate, with hirsute, zoned caps, and partly resupinate, with smooth to wrinkled undersurfaces that spread over the wood. Auricularia mesenterica is a saprotroph on dead deciduous trees and shrubs. The species is restricted to Europe and Central Asia.

<i>Exidia pithya</i> Species of fungus

Exidia pithya is a species of fungus in the family Auriculariaceae. Basidiocarps are gelatinous, black, and button-shaped at first, later coalescing and drying to form tar-like patches. The species grows on dead branches of conifers in continental Europe.

References

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  2. 1 2 3 Looney, B. (2013). "Systematics of the genus Auricularia with an emphasis on species from the southeastern United States". North American Fungi. doi:10.2509/naf2013.008.006. ISSN   1937-786X.
  3. 1 2 3 4 Wu F, Tohtirjap A, Fan L, Zhou L, Alvarenga RL, Gibertoni TB, Dai Y (2021). "Global diversity and updated phylogeny of Auricularia (Auriculariales, Basidiomycota)". Journal of Fungi. 7 (11): 933. doi: 10.3390/jof7110933 . PMC   8625027 . PMID   34829220.
  4. 貴, 白水; 重樹, 稲葉; 秀爾, 牛島; 康仁, 奥田; 栄史, 長澤 (2018). "日本産 "Auricularia auricula-judae " および" A. polytricha " の分子系統解析と形態比較に基づく分類学的検討". 日本菌学会会報. 59 (1): jjom.H30–02. doi: 10.18962/jjom.jjom.H30-02 .
  5. 1 2 3 Sisson, Liv (2023). Fungi of Aotearoa : a curious forager's field guide. Auckland, New Zealand: Penguin Random House New Zealand. ISBN   9781761047879.
  6. Elizabeth Speith. "Auricularia polytricha (Auriculariaceae) - HEAR species info". Hear.org. Retrieved 2011-02-28.
  7. 1 2 "Cuisine - Food - Cloud ear fungus". China Daily. 28 February 2011. Retrieved 4 May 2016.
  8. 1 2 Stephen Brightwell. "Feasting on Fungi" . Retrieved 15 October 2018.
  9. "Fungi, Cloud ears, dried". National Nutrient Database. Retrieved December 13, 2018.
  10. Smith, Lana Billings. "The nutritional benefits of wood ear fungus". www.livestrong.com. Retrieved 5 May 2016.
  11. "Why wood ear fungus should be a part of your daily meals". Organic Olivia. Archived from the original on 6 February 2017. Retrieved 5 May 2016.
  12. So, Yan-kit (16 January 2015). Yan-Kit's Classic Chinese Cookbook. Penguin. p. 248. ISBN   9781465439758.
  13. Riley, Murdoch (1988). Maori Vegetable Cooking: Traditional and Modern Methods. New Zealand: Viking Sevenseas NZ Ltd. p. 6.
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