Hymenochaetales

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Hymenochaetales
Inonotus tamaricis 01.JPG
Inonotus tamaricis
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Hymenochaetales
Oberw. (1977)
Families

The Hymenochaetales are an order of fungi in the class Agaricomycetes. The order in its current sense is based on molecular research and not on any unifying morphological characteristics. According to one 2008 estimate, the Hymenochaetales contain around 600 species worldwide, [1] mostly corticioid fungi and poroid fungi, but also including several clavarioid fungi and agarics. Species of economic importance include wood decay fungi in the genera Phellinus and Inonotus sensu lato, some of which may cause losses in forestry. Therapeutic properties are claimed for Inonotus obliquus ("chaga") and Phellinus linteus , both of which are now commercially marketed.

Contents

Taxonomy

History

The order was proposed in 1977 to recognize the family Hymenochaetaceae at a higher taxonomic rank. As originally conceived, species within the Hymenochaetales had several morphological features in common, notably brown or brownish basidiocarps (fruit bodies) that turn black in alkali, hyphae lacking clamp connections, and the presence (in most species) of characteristic setae (thick-walled, thorn-shaped cystidia, visible under a hand lens). [2]

Subsequent ultrastructure research showed that the Hymenochaetales had dolipores with imperforate parenthesomes, whereas most Agaricomycetes have dolipores with perforate parenthesomes. [3] [4] Species of the corticioid genera Hyphodontia and Schizopora were later found to share this peculiarity, [5] suggesting they might also be related to the Hymenochaetales, though morphologically dissimilar.

Current status

Molecular research, based on cladistic analysis of DNA sequences, has substantially expanded and redefined the Hymenochaetales, dividing the order into at least six different clades. [2] The core clade represents the traditional Hymenochaetaceae, excluding the genera Coltricia and Coltriciella ; another clade includes the corticioid genera Lyomyces and Schizopora (Schizoporaceae), together with Coltricia and Coltriciella as a subclade; a further clade (Repetobasidiaceae) includes agaricoid Rickenella species, [6] the clavarioid Alloclavaria purpurea , [7] and various corticioid fungi, including the genus Repetobasidium ; the three remaining clades consist of corticioid Hyphodontia species, corticioid Kneifiella species, and poroid Oxyporus species. [2]

Not all the species currently placed within the Hymenochaetales have dolipores with imperforate parenthosomes, so the order lacks any shared morphological characteristics. [2]

Habitat and distribution

Most fungi within the order are saprotrophs of dead wood, but some species within the Hymenochaetaceae can cause rots of living trees. Species of Coltricia and Coltriciella are ectomycorrhizal. [8] Agaricoid species of Rickenella and related genera are parasites of mosses and liverworts. [6] Distribution of the Hymenochaetales is cosmopolitan.

Economic importance

Several wood decay fungi in the genera Phellinus and Inonotus sensu lato are pathogenic, causing losses in forestry plantations. Therapeutic properties are claimed for Inonotus obliquus ("chaga") [9] and Phellinus linteus , [10] both of which are commercially marketed as alternative medicines.

Genera incertae sedis

Several genera in the Hymenochatales are incertae sedis with respect to familial placement:

Related Research Articles

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

The Cantharellales are an order of fungi in the class Agaricomycetes. The order includes not only the chanterelles (Cantharellaceae), but also some of the tooth fungi (Hydnaceae), clavarioid fungi, and corticioid fungi (Botryobasidiaceae). Species within the order are variously ectomycorrhizal, saprotrophic, associated with orchids, or facultative plant pathogens. Those of economic importance include edible and commercially collected Cantharellus, Craterellus, and Hydnum species as well as crop pathogens in the genera Ceratobasidium and Thanatephorus/Rhizoctonia.

<span class="mw-page-title-main">Agaricales</span> Order of mushrooms

The Agaricales are an order of fungi in the division Basidiomycota. As originally conceived, the order contained all the agarics, but subsequent research has shown that not all agarics are closely related and some belong in other orders, such as the Russulales and Boletales. Conversely, DNA research has also shown that many non-agarics, including some of the clavarioid fungi and gasteroid fungi belong within the Agaricales. The order has 46 extant families, more than 400 genera, and over 25,000 described species, along with six extinct genera known only from the fossil record. Species in the Agaricales range from the familiar Agaricus bisporus and the deadly Amanita virosa to the coral-like Clavaria zollingeri and bracket-like Fistulina hepatica.

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

The Hygrophoraceae are a family of fungi in the order Agaricales. Originally conceived as containing white-spored, thick-gilled agarics, including Hygrophorus and Hygrocybe species, DNA evidence has extended the limits of the family, so it now contains not only agarics, but also basidiolichens and corticioid fungi. Species are thus diverse and are variously ectomycorrhizal, lichenized, associated with mosses, or saprotrophic. The family contains 34 genera and over 1000 species. None is of any great economic importance, though fruit bodies of some Hygrocybe and Hygrophorus species are considered edible and may be collected for sale in local markets.

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

The Clavariaceae are a family of fungi in the order Agaricales. Originally the family contained most of the clavarioid fungi, but in its current sense is more restricted, albeit with a greater diversity of basidiocarp forms. Basidiocarps are variously clavarioid or agaricoid (mushroom-shaped), less commonly corticioid or hydnoid.

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

The Clavulinaceae are a family of fungi in the order Cantharellales. The family is not well defined, but currently comprises species of clavarioid fungi as well as some corticioid fungi. These species are nutritionally diverse, some being ectomycorrhizal, others wood-rotting saprotrophs, others lichenized, and yet others lichenicolous.

<span class="mw-page-title-main">Agaricomycetes</span> Class of fungi

The Agaricomycetes are a class of fungi in the division Basidiomycota. The taxon is roughly identical to that defined for the Homobasidiomycetes by Hibbett & Thorn, with the inclusion of Auriculariales and Sebacinales. It includes not only mushroom-forming fungi, but also most species placed in the deprecated taxa Gasteromycetes and Homobasidiomycetes. Within the subdivision Agaricomycotina, which already excludes the smut and rust fungi, the Agaricomycetes can be further defined by the exclusion of the classes Tremellomycetes and Dacrymycetes, which are generally considered to be jelly fungi. However, a few former "jelly fungi", such as Auricularia, are classified in the Agaricomycetes. According to a 2008 estimate, Agaricomycetes include 17 orders, 100 families, 1147 genera, and about 21000 species. Modern molecular phylogenetic analyses have been since used to help define several new orders in the Agaricomycetes: Amylocorticiales, Jaapiales, Stereopsidales, and Lepidostromatales.

<i>Contumyces</i> Genus of fungi

Contumyces is a genus of brightly colored possibly bryophilous or graminicolous agarics in the Hymenochaetales. They have an omphalinoid morphology, and therefore were previously classified in Omphalina. They inhabit mossy or grassy silty or sandy soils in the Northern Hemisphere. Phylogenetically related agarics are in the genera Rickenella, Gyroflexus, Loreleia, Cantharellopsis and Blasiphalia, as well as the stipitate-stereoid genera Muscinupta and Cotylidia and clavarioid genus, Alloclavaria. Contumyces is most similar to Rickenella and Blasiphalia and differs by having its cystidia on the cap, stipe, and hymenium in clusters, whereas in Rickenella and Blasiphalia the cystidia are solitary. Lichenomphalia also may appear similar, but grows on mossy wood.

<i>Rickenella</i> Genus of fungi

Rickenella is a genus of brightly colored bryophilous agarics in the Hymenochaetales that have an omphalinoid morphology. They inhabit patches of moss that grow on soil, tree trunks and logs in temperate regions of the planet. Phylogenetically related agarics are in the genera Contumyces, Gyroflexus, Loreleia, Cantharellopsis and Blasiphalia, as well as the stipitate-stereoid genera Muscinupta and Cotylidia. and the clavarioid genus, Alloclavaria.

Blasiphalia is a fungal genus in the family Repetobasidiaceae. A monotypic genus, it contains the honey colored omphalinoid agaric, Blasiphalia pseudogrisella, which grows with the liverwort genus Blasia. Phylogenetically related agarics are in the genera Rickenella, Gyroflexus, Loreleia, Cantharellopsis and Contumyces, as well as the stipitate-stereoid genera Muscinupta and Cotylidia and clavarioid genus, Alloclavaria. Blasiphalia is most similar to Rickenella and Contumyces, and was only just recognized as a distinct genus in 2007 based upon molecular analysis. The fungus is unique in parasitizing Blasia by forming clasping appresoria on its host's rhizoids. Its basidiospores also germinate on the host's gemmae and clasp them and therefore can be disseminated together with the gemmae.

<i>Gyroflexus</i> Genus of fungi

Gyroflexus is a monotypic genus with a yellowish-ivory colored omphalinoid agaric in the Hymenochaetales that grows on living Sphagnum Phylogenetically related agarics are in the genera Rickenella, Blasiphalia, Loreleia, Cantharellopsis and Contumyces, as well as the stipitate-stereoid genera Muscinupta and Cotylidia and clavaroid genus, Alloclavaria. Gyroflexus brevibasidiatus, the type, amongst the vaguely omphalinoid genera is distinguished by its small, mammiform pileus, growth on Sphagnum, and lack of cystidia.

<i>Loreleia</i> Genus of fungi

Loreleia is a genus of brightly colored agarics in the Hymenochaetales that have an omphalinoid morphology. They inhabit mosses and or liverworts on soil in temperate regions of the Northern Hemisphere. Phylogenetically related agarics are in the genera Contumyces, Gyroflexus, Rickenella, Cantharellopsis and Blasiphalia, as well as the stipitate-stereoid genera Muscinupta and Cotylidia and the clavaroid genus, Alloclavaria. However, the large number of DNA base-pair changes causes a long-branch to form in phylogenetic analyses depicted as cladograms.

Cantharellopsis is a tan- to whitish-colored bryophilous monotypic genus in the Hymenochaetales. The fruit bodies of the single species Cantharellopsis prescotii has a form intermediate between an Omphalina and a chanterelle (Cantharellus) because of its forked, fold-like gills. It inhabits moss on calcareous soils in temperate regions of Europe. Phylogenetically related agarics are in the genera Contumyces, Gyroflexus, Loreleia, Rickenella and Blasiphalia, as well as the stipitate-stereoid genera Muscinupta and Cotylidia and the clavarioid genus, Alloclavaria.

<i>Cotylidia</i> Genus of fungi

Cotylidia is a fungal genus characterized by small to moderately sized, white to palely yet brightly colored, stalked, fan-shaped to funnel-shaped fruit bodies with a smooth to wrinkled hymenium, tissues composed of monomitic hyphae, basidia producing smooth, nonamyloid spores, the absence of clamp connections, and bearing projecting cylindrical, thin-walled, hymenial cystidia. The genus is classified in the Hymenochaetales, however the type species, C. undulata has not yet been sequenced. Phylogenetically-related agaricoid fungi to the two species of Cotylidia thus far sequenced are in the genera Rickenella, Contumyces, Gyroflexus, Loreleia, Cantharellopsis and Blasiphalia, and Muscinupta and the clavarioid genus, Alloclavaria.

<i>Alloclavaria</i> Genus of fungi

Alloclavaria is a clavarioid genus in the Hymenochaetales recently segregated from Clavaria by molecular analysis. Phylogenetically related fungi are in the agaricoid genera Rickenella, Contumyces, Gyroflexus, Loreleia, Cantharellopsis and Blasiphalia, as well as the stipitate stereoid genera Cotylidia and Muscinupta. The only species as yet placed in Alloclavaria is the type, formerly known as Clavaria purpurea under which name it is often cited or illustrated.. It is suspected, via circumstantial evidence, i.e. habitat, but not proven, that Alloclavaria is mycorrhizal.

<i>Trichaptum</i> Genus of fungi

Trichaptum is a genus of poroid fungi. The genus was circumscribed by American mycologist William Alphonso Murrill in 1904. Formerly classified in the family Polyporaceae, several molecular studies have shown that the genus belongs to the order Hymenochaetales.

Lawrynomyces is a genus of fungi in the Rickenella-clade of the order Hymenochaetales, containing the single species Lawrynomyces capitatus.

Tropicoporus tropicalis is a mushroom of the family Hymenochaetaceae. Tropicoporus tropicalis is a wood-decaying basidiomycetes that rarely causes disease in animals and human, and is commonly found in humid climate such as Brazil. In its natural environment, the fungus is associated with white rot woody angiosperms, and has its annual fruiting body on tree trunks and branches. Tropicoporus tropicalis has two kinds of hyphae, generative and skeletal, that lack clamp connections.

<i>Inocutis</i> Genus of fungi

Inocutis is a genus of nine species of polypore fungi in the family Hymenochaetaceae.

Kurt Egon Hjortstam (1933–2009) was a Swedish mycologist, specialising in the taxonomy of corticioid fungi.

References

  1. ↑ Kirk PM, Cannon PF, Minter DW, Stalpers JA (2008). Dictionary of the Fungi (10th ed.). Wallingford, UK: CAB International. p. 116. ISBN   978-0-85199-826-8.
  2. 1 2 3 4 Larsson K-H; et al. (2006). "Hymenochaetales: a molecular phylogeny for the hymenochaetoid clade". Mycologia. 98 (6): 926–936. doi:10.3852/mycologia.98.6.926. PMID   17486969.
  3. ↑ Moore RT. (1980). "Taxonomic significance of septal ultrastructure in the genus Onnia". Bot. Not. 133: 169–175.
  4. ↑ Müller WH, et al. (2000). "The taxonomic position of Asterodon, Asterostroma and Coltricia inferred from the septal pore cap ultrastructure". Mycological Research. 104 (12): 1485–1492. doi:10.1017/s0953756200002677.
  5. ↑ Langer E, Oberwinkler F (1993). "Corticioid Basidiomycetes I. Morphology and ultrastructure". Windahlia. 20: 1–28.
  6. 1 2 Redhead SA, Moncalvo J-M, Vilgalys R, Lutzoni F (2002). "Phylogeny of agarics: partial systematics solutions for bryophilous omphalinoid agarics outside of the Agaricales". Mycotaxon. 82: 151–168.
  7. ↑ Dentinger BTM, McLaughlin DJ (2006). "Reconstructing the Clavariaceae using nuclear large subunit rDNA sequences and a new genus segregated from Clavaria". Mycologia. 98 (5): 746–762. doi:10.3852/mycologia.98.5.746. PMID   17256578.
  8. ↑ Tedersoo L, Suvi T, Beaver K, Saar I (2007). "Ectomycorrhizas of Coltricia and Coltriciella (Hymenochaetales, Basidiomycota) on Caesalpiniaceae, Dipterocarpaceae and Myrtaceae in Seychelles". Mycological Progress. 6 (2): 101–107. doi:10.1007/s11557-007-0530-4.
  9. ↑ Mizuno T. (1999). "Antitumor and hypoglycemic activities of polysaccharides from the sclerotia and mycelia of Inonotus obliquus". International Journal of Medicinal Mushrooms. 1 (1): 301–316. doi:10.1615/intjmedmushr.v1.i4.20.
  10. ↑ Zhu T, Kim SH, Chen CY (2008). "A medicinal mushroom: Phellinus linteus". Current Medicinal Chemistry. 15 (13): 1330–5. doi:10.2174/092986708784534929. PMID   18537612. Archived from the original on 2012-07-30.{{cite journal}}: CS1 maint: unfit URL (link)
  11. ↑ Stalpers JA. (2000). "The genus Ptychogaster" (PDF). Karstenia. 40: 167–80. Archived from the original (PDF) on 2016-03-03. Retrieved 2014-02-25.
  12. ↑ Ghobad-Nejhad M, Dai YC (2010). "Diplomitoporus rimosus is found in Asia and belongs to the Hymenochaetales". Mycologia. 102 (6): 1510–7. doi:10.3852/10-025. PMID   20943544.
  13. ↑ Wu SH, Nilsson RH, Chen CT, Yu SY, Hallenberg N (2010). "The white-rotting genus Phanerochaete is polyphyletic and distributed throughout the phleboid clade of the Polyporales (Basidiomycota)". Fungal Diversity. 42: 107–18. doi:10.1007/s13225-010-0031-7.
  14. ↑ Karasiński D. (2013). "Lawrynomyces, a new genus of corticioid fungi in the Hymenochaetales". Acta Mycologica (Warszawa). 48 (1): 5–11. doi: 10.5586/am.2013.001 .
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