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Hericium erinaceus

From Wikipedia, the free encyclopedia
For the other species named hedgehog mushroom, see Hydnum repandum.

Hericium erinaceus
Specimen on fallen log
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Russulales
Family: Hericiaceae
Genus: Hericium
Species:
H. erinaceus
Binomial name
Hericium erinaceus
(Bull.) Persoon (1797)
Synonyms
  • Hydnum erinaceus Bull. (1781)
  • Clavaria erinaceus
  • Dryodon erinaceus
View the Mycomorphbox template that generates the following list
Teeth on hymenium
No distinct cap
Hymenium attachment is not applicable
Lacks a stipe
Spore print is white
Ecology is saprotrophic
Edibility is choice

Hericium erinaceus, commonly known as lion's mane, yamabushitake, bearded tooth fungus, or bearded hedgehog,[1][2] is a species of tooth fungus. It tends to grow in a single clump with dangling spines longer than 1 centimetre (1⁄2 inch). It can be mistaken for other Hericium species that grow in the same areas.

Native to North America and Eurasia, the mushrooms are common during late summer and autumn on hardwoods, particularly American beech and maple. Usually H. erinaceus is considered saprophytic, as it mostly feeds on dead trees. It can also be found on living trees, usually in association with a wound. The fruit bodies can be harvested for culinary use and are used in traditional Chinese medicine.

Taxonomy

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Despite its higher prevalence in Asia, Hericium erinaceus was first described scientifically in North America.[citation needed]

Etymology

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Both the Latin genus name Hericium and the species name erinaceus mean 'hedgehog' in Latin. This is also reflected by the German name, Igel-Stachelbart (literally, 'hedgehog-goatee'), and some of its common English names, such as bearded hedgehog and hedgehog mushroom.[3] It is known in Japan as yamabushitake (Kanji: 山伏茸, Katakana: ヤマブシタケ) in reference to the yamabushi or mountain ascetics of the syncretistic religion known as Shugendo; while in Chinese, it is known as hóutóugū (simplified Chinese: 猴头菇; traditional Chinese: 猴頭菇; Jyutping: hau4 tou4 gu1) meaning "monkey-head mushroom", and in Europe and the United States as lion's mane.[4]

Description

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Specimen on living tree

The fruit bodies of H. erinaceus are large, irregular bulbous tubercules. They are 5–40 centimetres (2–15+1⁄2 inches) in diameter,[5] and are dominated by crowded, hanging, spore-producing spines, which are 1–5 cm (1⁄2–2 in) long or longer.[6][7]

The hyphal system is monomitic, amyloid, and composed of thin- to thick-walled hyphae that are approximately 3–15 μm (microns) wide. The hyphae also contain clamped septa and gloeoplerous elements (filled with oily, resinous substances), which can come into the hymenium as gloeocystidia.

The basidia are 25–40 μm long and 5–7 μm wide, contain four spores each and possess a basal clamp. The white amyloid spores measure approximately 5–7 μm in length and 4–5 μm in width. The spore shape is described as subglobose to short ellipsoid and the spore surface is smooth to finely roughened.[5][6]

Development

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It has been observed that H. erinaceus can fruit intermittently for 20 years on the same dead tree. It is hypothesized that H. erinaceus can survive for 40 years.[5] The mating system of H. erinaceus species found in the U.S. was shown to be bifactorially heterothallic.[8]

The monokaryotic mycelium growth of H. erinaceus is slower than dikaryotic growth and only a relatively low percentage of monokaryotic cultures yield fruitbodies. Monokaryotic fruitbodies are also smaller than dikaryotic fruitbodies.[5] The monokaryotic mycelium was found to produce fusoid to subglobose chlamydospores of 6–8 x 8–10 μm size. These spores can stay viable for more than seven years and be stored under anaerobic conditions.[citation needed] Chlamydospore germination requires 30 to 52 hours, with a germination success rate of 32 to 54%.[8]

Spore production is highest at midday, relative to temperature increase and a decrease of relative humidity. Daily trends toward lower relative humidity can favor sporulation, however, levels of relative humidity that are too low do not favor high total spore production.[9]

Mycochemistry

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H. erinaceus contains diverse phytochemicals, including polysaccharides, such as β-glucan, as well as hericenones and erinacines.[3] From its essential oil, 77 aroma and flavor compounds were identified, including hexadecanoic acid (26% of total oil composition), linoleic acid (13%), phenylacetaldehyde (9%) and benzaldehyde (3%), and other oils, such as 2-methyl-3-furanthiol, 2-ethylpyrazine and 2,6-diethylpyrazine.[10] Low concentrations of ergosterol are present.[3]

Similar species

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Similar species in the genus include H. americanum and H. coralloides,[7] both found in eastern North America.[11] Additional species with a resemblance include Donkia pulcherrima, Radulomyces copelandii and some within Sarcodontia.[12]

Distribution and habitat

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In Europe, the fruit bodies of H. erinaceus are mainly produced annually from August to November.[13] In North America, they appear from October to February in the west, from July to October in the Mountain states, and from September to February in the east.[12]

In the wild, lion's mane is usually associated with a tree wound and causes a white pocket rot. Decayed tissue becomes spongy and eventually disintegrates to form a cavity. The distinctive fruiting bodies (basidiocarps) generally appear near the edges of old wounds in autumn.[14] It may be a tree parasite, possibly indicating an endophytic habitat.[citation needed]

H. erinaceus hosts in North America include maple, ash, oaks, and eucalyptus.[14] In California, lion's mane has been found on coast live oak, canyon live oak, interior live oak, California black oak, blue oak, and valley oak.[14]

Lion's mane is able to withstand cold temperatures and frost conditions.[15]

Ecology

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Disease

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Brennandania lambi (Acari: Pygmephoroidea) is a mite pest of fungi culture in China. This mite can develop and reproduce on the mycelium of H. erinaceus. Farm hygiene and heat treatments are the most important pest management strategies that should be followed to counter this acarus.[16]

Competition with other fungi

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Hericium species are good competitors against other wood colonisers. They show the ability to maintain their place on dead wood, also when confronted with secondary colonizers, such as Trametes versicolor and Stereum hirsutum.[5] Hericium erinaceus has shown to be slightly more competitive than other fungi tooth species, including Creolophus cirrhatus and H. coralloides.[17]

Conservation

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Although H. erinaceus is native to Europe, it has been red listed in 13 European countries due to poor germination and establishment.[citation needed]

Cultivation

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In fungi cultivation, fungal strains are analogous to plant varieties in crop breeding.[11] Fungal strains comprise clonal descendants of a single isolation from one fungal colony in a pure culture.[18] The production of H. erinaceus is widespread in Asia, mostly using extensive production practices on wood logs or stumps.[3]

Although there is considerable scientific research about Hericium spp., they are not commonly industrially produced in the West. Accordingly, there are few commercially available strains in the U.S. or Europe and little or no breeding for higher yield or other favorable traits has occurred.[11] Production trials in Egypt report yields of H. erinaceus averaging at 165 g per 1 kg medium.[19]

In North America, its production occurs only on a small scale. Most of it is intensive indoor production with only a few small outdoor sites where log cultivation is practiced.[11]

Substrate requirements

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As a saprophyte that occurs on dead wood,[3] H. erinaceus requires adequate substrate factors, including suitable carbon and nitrogen sources, a certain pH value and ideal carbon-to-nitrogen ratio.[20][21]

Many different substrates have been used to successfully cultivate this mushroom. Depending on the type of cultivation, the substrate can be either solid (artificial log) or liquid (submerged culture and deep submerged culture).

The solid substrate is most commonly a mixture of sawdust of hardwood or conifer containing different complements that may include wheat bran, wheat straw, soybean meal, corn meal, rice bran, and rice straw. For example, H. erinaceus strains grow on beech sawdust substrate enriched with wheat bran (20%), rye grain (25%), soybean meal (7%), rapeseed meal (10%), or meat-osseous flour (6%).[19]

An example of a liquid substrate composition can be glucose for the carbon source, soybean powder, corn powder, and wheat bran powder as a complex nitrogen source.[21] The pH values most suitable for the favorable growth of H. erinaceus were in the range of 5.0–9.0, with pH 6.0 as optimal.[22]

Climate requirements

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Hericium erinaceus requires a humid environment for its growth: 85 to 90% of relative humidity in the air.[5] The incubation temperature most suitable for the mycelial growth of H. erinaceus was found to be 25 °C,[22] and the optimum temperature for vegetative growth was 26 °C.[22] H. erinaceus is unable to grow with a water potential lower than -5 Mpa.[15]

Techniques

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The artificial cultivation of H. erinaceus was first reported in China in 1988.[citation needed] It is cultivated using artificial logs, bottles, and polypropylene bags. However, this type of artificial cultivation is not suitable for industrialized production due to its low yield and long cultivation cycles.[21]

Submerged culture is a type of artificial cultivation of H. erinaceus whereby the fungus is grown in a liquid medium. Using this method, a large number of mycelia can be obtained quickly.[21] Bioactive compounds can be sourced from the fruiting bodies, submerged-cultivated mycelial biomass, or liquid-cultivated broth. Growers optimize the culture medium composition to obtain simultaneously high yields of H. erinaceus mycelial biomass, exopolysaccharides, and polysaccharides.[citation needed] Submerged fermentation is preferable for the production of mycelial biomass and biologically active metabolites in order to produce a more uniform biomass and extract products.[23]

Growth regulators, such as 2,4-Dichlorophenoxyacetic acid and gibberellin, were observed to have an advantageous effect on spore germination.[24] Other technologies, such as red and green laser light of low intensity, stimulated spore germination as well as the vegetative growth of mycelium.[25] Argon and helium lasers also contributed to the acceleration of fruit body development by 36–51%.[5][26]

Wild strains

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Wild strains of Hericium spp. can be isolated and cultivated by first gathering fruiting bodies from fallen trees in the natural habitat. The fruiting bodies can then be opened to attain pieces of their inner spore-producing tissue. This tissue is then placed onto Petri dishes with agar to cultivate fungal colonies at 25 °C. After several transfers to new Petri dishes to verify the purity of the strain, it can be kept at −80 °C for long-term storage.[27]

Uses

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Culinary

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Rock cod with grilled H. erinaceus

The edible fruiting bodies are common in gourmet cooking, with young specimens considered the best.[28] Alongside shiitake (Lentinus edodes) and oyster (Pleurotus ostreatus) mushrooms, H. erinaceus is used as a specialty mushroom in recipes.[27][29]

H. erinaceus fruiting bodies contain 57% carbohydrates (8% as dietary fiber), 4% fat, and 22% protein.[30]

Medicinal

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H. erinaceus has been used in traditional Chinese medicine for centuries.[3] More recently, it has been included in products such as coffee and touted as an adaptogen.[31]

Clinical trials

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H. erinaceus has been the subject of at least eight clinical studies investigating its potential neurological and cognitive benefits. [32] Key research findings include:

  • Cognitive function in young adults: A 2023 pilot study examined the effects of H. erinaceus supplementation on cognitive performance, stress, and mood in young adults. Participants who consumed 1.8 grams daily for 28 days demonstrated improved cognitive task performance and reported a trend toward reduced stress levels.[33]
  • Mild cognitive impairment in older adults: Research involving older adults with mild cognitive impairment found that participants taking Lion's Mane supplements experienced significant improvements in cognitive function compared to those receiving a placebo.[34] However, the benefits diminished after discontinuing the supplement, suggesting the need for ongoing use to sustain effects.

Further large-scale and long-term studies are needed to confirm the therapeutic potential and safety of Lion's Mane.

See also

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References

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  1. ^ Arora, David (1986). Mushrooms demystified: a comprehensive guide to the fleshy fungi (Second ed.). Berkeley: Ten Speed Press. ISBN 978-0-89815-169-5.
  2. ^ "Reforestation: Traditional Methods Have to Change". The Sierra Forest Voice. Vol. 8, no. 2. 2015. Archived from the original on 2023-04-04. Retrieved 2021-12-06.
  3. ^ a b c d e f "Lion's mane mushroom". Drugs.com. 23 November 2020. Archived from the original on 5 June 2023. Retrieved 2 September 2021.
  4. ^ Kawagishi, Hirokazu (2018). "Biologically Functional Compounds from Mushroom-Forming Fungi". Natural Products and Drug Discovery. pp. 309–326. doi:10.1016/B978-0-08-102081-4.00011-3. ISBN 978-0-08-102081-4.
  5. ^ a b c d e f g Sokół, Sławomir; Golak-Siwulska, Iwona; Sobieralski, Krzysztof; Siwulski, Marek; Górka, Katarzyna (29 January 2016). "Biology, cultivation, and medicinal functions of the mushroom Hericium erinaceum". Acta Mycologica. 50 (2). doi:10.5586/am.1069.
  6. ^ a b Wald, Paul; Pitkkänen, Sini; Boddy, Lynne (December 2004). "Interspecific interactions between the rare tooth fungi Creolophus cirrhatus, Hericium erinaceus and H. coralloides and other wood decay species in agar and wood". Mycological Research. 108 (12): 1447–1457. doi:10.1017/s0953756204001340. PMID 15757181.
  7. ^ a b Davis, R. Michael; Sommer, Robert; Menge, John A. (2012). Field Guide to Mushrooms of Western North America. Berkeley: University of California Press. pp. 280–281. ISBN 978-0-520-95360-4. OCLC 797915861.
  8. ^ a b Ginns, J. (1985-09-01). "Hericium in North America: cultural characteristics and mating behavior". Canadian Journal of Botany. 63 (9): 1551–1563. Bibcode:1985CaJB...63.1551G. doi:10.1139/b85-215. ISSN 0008-4026. Archived from the original on 2023-04-04. Retrieved 2020-11-26.
  9. ^ McCracken, F. I. (1970). "Spore Production of Hericium erinaceus". Phytopathology. 60 (11): 1639. doi:10.1094/Phyto-60-1639.
  10. ^ Miyazawa, Mitsuo; Matsuda, Naoki; Tamura, Naotaka; Ishikawa, Ryuuzou (8 December 2011). "Characteristic Flavor of Volatile Oil from Dried Fruiting Bodies of Hericium erinaceus (Bull.: Fr.) Pers". Journal of Essential Oil Research. 20 (5): 420–423. doi:10.1080/10412905.2008.9700046.
  11. ^ a b c d "Lion's Mane: A new candidate for profitable forest mushroom cultivation". Cornell Small Farms. 2015-04-06. Archived from the original on 2023-04-04. Retrieved 2020-11-26.
  12. ^ a b Audubon (2023). Mushrooms of North America. Knopf. p. 163. ISBN 978-0-593-31998-7.
  13. ^ Fraiture A, Otto P (2015). Distribution, ecology and status of 51 macromycetes in Europe: results of the ECCF Mapping Programme. European Council for the Conservation of Fungi. ISBN 978-90-823525-5-9. OCLC 922038479.
  14. ^ a b c Swiecki, Tedmund J.; Bernhardt, Elizabeth A. (2006). A Field Guide to Insects and Diseases of California Oaks. Pacific Southwest Research Station (Report). Gen. Tech Rep. PSW-GTR-197. Albany, California: U.S. Forest Service Treesearch Department. pp. 100–101. doi:10.2737/PSW-GTR-197. Public Domain This article incorporates text from this source, which is in the public domain.
  15. ^ a b Boddy, Lynne; Crockatt, Martha E.; Ainsworth, A. Martyn (2011-04-01). "Ecology of Hericium cirrhatum, H. coralloides and H. erinaceus in the UK". Fungal Ecology. Conservation underground: Fungi in a changing world. 4 (2): 163–173. Bibcode:2011FunE....4..163B. doi:10.1016/j.funeco.2010.10.001. ISSN 1754-5048.
  16. ^ Wu, Jufang; Zhang, Zhi-Qiang (March 1993). "Host feeding, damage and control of the mushroom pest, Brennandania lambi (Acari: Pygmephoroidea) in China". Experimental and Applied Acarology. 17 (3): 233–240. doi:10.1007/BF00118440.
  17. ^ Wald, Paul; Pitkkänen, Sini; Boddy, Lynne (December 2004). "Interspecific interactions between the rare tooth fungi Creolophus cirrhatus, Hericium erinaceus and H. coralloides and other wood decay species in agar and wood". Mycological Research. 108 (12): 1447–1457. doi:10.1017/S0953756204001340. PMID 15757181.
  18. ^ Dijkshoorn, L.; Ursing, B.M.; Ursing, J.B. (2000-05-01). "Strain, clone and species: comments on three basic concepts of bacteriology". Journal of Medical Microbiology. 49 (5): 397–401. doi:10.1099/0022-1317-49-5-397. ISSN 0022-2615. PMID 10798550.
  19. ^ a b Hassan, F.R.H (2007). "Cultivation of the Monkey Head Mushroom (Hericium erinaceus) in Egypt" (PDF). Journal of Applied Sciences Research. 3 (10): 1229–1233. Archived (PDF) from the original on 2023-04-04. Retrieved 2020-11-26.
  20. ^ Gonkhom, Didsanutda; Luangharn, Thatsanee; Hyde, Kevin D.; Stadler, Marc; Thongklang, Naritsada (2022-08-31). "Optimal conditions for mycelial growth of medicinal mushrooms belonging to the genus Hericium". Mycological Progress. 21 (9): 82. Bibcode:2022MycPr..21...82G. doi:10.1007/s11557-022-01829-6. S2CID 251994082.
  21. ^ a b c d He, Xirui; Wang, Xiaoxiao; Fang, Jiacheng; Chang, Yu; Ning, Ning; Guo, Hao; Huang, Linhong; Huang, Xiaoqiang; Zhao, Zefeng (April 2017). "Structures, biological activities, and industrial applications of the polysaccharides from Hericium erinaceus (Lion's Mane) mushroom: A review". International Journal of Biological Macromolecules. 97: 228–237. doi:10.1016/j.ijbiomac.2017.01.040. PMID 28087447.
  22. ^ a b c Nguyen, Bich Thuy Thi; Ngo, Nghien Xuan; Le, Ve Van; Nguyen, Luyen Thi; Tran, Anh Dong; Nguyen, Lam Hai Thi (2018-10-19). "Identification of Optimal Culture Conditions for Mycelial Growth and Cultivation of Monkey Head Mushrooms (Hericium erinaceus (Bull.: fr.) Pers)". Vietnam Journal of Agricultural Sciences. 1 (2): 117–126. doi:10.31817/vjas.2018.1.2.01.
  23. ^ "Impact of Substrate Volume on Oyster Mushroom Fruiting Bodies Production". Assiut Journal of Agricultural Sciences. 51 (2): 154–169. 2020-05-01. doi:10.21608/ajas.2020.117203. ISSN 2356-9840.
  24. ^ Zhixue, Feng; Xiwen, Liu; Lu Yaohuan (1998). "A Study on the Effect and Mechanism of 2,4 - D and Gibberellin on Hericium erinaceus". Acta Edulis Fungi. 5 (3): 44–49. doi:10.16488/j.cnki.1005-9873.1998.03.009.
  25. ^ Poyedinok, Natalia L.; Potemkina, Janna V.; Buchalo, Asja S.; Negriyko, Anatoliy M.; Grygansky, Andriy P. (2000). "Stimulation with Low-Intensity Laser Light of Basidiospore Germination and Growth of Monokaryotic Isolates in the Medicinal Mushroom Hericium erinaceus (Bull.: Fr.) Pers. (Aphyllophoromycetideae)". International Journal of Medicinal Mushrooms. 2 (4): 4. doi:10.1615/IntJMedMushr.v2.i4.140.
  26. ^ Poyedinok, Natalia L.; Buchalo, Asja S.; Negriyko, Anatoliy M.; Potemkina, Janna V.; Mykchaylova, Oksana B. (2003). "The Action of Argon and Helium-Neon Laser Radiation on Growth and Fructification of Culinary-Medicinal Mushrooms Pleurotus ostreatus (Jacq.:Fr.) Kumm., Lentinus edodes (Berk.) Singer, and Hericium erinaceus(Bull.:Fr.)Pers". International Journal of Medicinal Mushrooms. 5 (3): 8. doi:10.1615/InterJMedicMush.v5.i3.70.
  27. ^ a b Grace, Jeanne; Mudge, Kenneth W. (2015). "Production of Hericium sp. (Lion's Mane) mushrooms on totem logs in a forest farming system". Agroforestry Systems. 89 (3): 549–556. Bibcode:2015AgrSy..89..549G. doi:10.1007/s10457-015-9790-1.
  28. ^ Davis, R. Michael; Sommer, Robert; Menge, John A. (2012). Field Guide to Mushrooms of Western North America. Berkeley: University of California Press. p. 29. ISBN 978-0-520-95360-4. OCLC 797915861.
  29. ^ Royse, Daniel J. (1996). "Speciality Mushrooms and Their Cultivation". Horticultural Reviews. pp. 59–97. doi:10.1002/9780470650622.ch2. ISBN 978-0-471-16529-3.
  30. ^ Mau, Jeng-Leun; Lin, Hsiu-Ching; Ma, Jung-Tsun; Song, Si-Fu (June 2001). "Non-volatile taste components of several speciality mushrooms". Food Chemistry. 73 (4): 461–466. doi:10.1016/S0308-8146(00)00330-7.
  31. ^ Joshi, Priyankaa (2024-10-10). "Is mushroom coffee a healthier alternative to your morning cappuccino? The GHI investigates". Good Housekeeping. Retrieved 2024-11-14.
  32. ^ "Mushroom Clinical Trials". mushroomclinicaltrials.com. Retrieved 2024-12-25.
  33. ^ Rickenbacher, E.; Furman, B.; Shelton, R. (2013). "Hericium erinaceus (Lion's mane) improves cognition and mood in healthy young adults: A randomized controlled trial". PLOS ONE. 8 (10): e76478. doi:10.1371/journal.pone.0076478. PMID 24130776.
  34. ^ Mori, K.; Inatomi, S.; Ouchi, K.; Azumi, Y.; Tuchida, T. (2009). "Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment: a double-blind placebo-controlled clinical trial". Phytotherapy Research. 23 (3): 367–372. doi:10.1002/ptr.2634. PMID 18844328.
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