Sebacina

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Sebacina
Tremellodendron pallidum 54765.jpg
Sebacina schweinitzii
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Sebacinales
Family: Sebacinaceae
Genus: Sebacina
Tul. & C.Tul. (1871)
Type species
Sebacina incrustans
(Pers.) Tul. & C.Tul. (1871)
Species

Sebacina alutacea
Sebacina aureomagnifica
Sebacina confusa
Sebacina cystidiata
Sebacina dimitica
Sebacina epigaea
Sebacina flagelliformis
Sebacina guayanensis
Sebacina incrustans
Sebacina ocreata
Sebacina pileata
Sebacina pseudocandida
Sebacina schweinitzii
Sebacina sparassoidea
Sebacina tomentosa

Contents

Synonyms

Cristella Pat. (1887)
Soppittiella Massee (1892)
Tremellodendron G.F. Atk. (1902)
Atkinsonia Lloyd (1916)

Sebacina is a genus of fungi in the family Sebacinaceae. Its species are mycorrhizal, forming a range of associations with trees and other plants. Basidiocarps (fruit bodies) are produced on soil and litter, sometimes partly encrusting stems of living plants. The fruit bodies are cartilaginous to rubbery-gelatinous and variously effused (corticioid) to coral-shaped (clavarioid). The genus has a cosmopolitan distribution.

Taxonomy

History

The genus was first published in 1871 by Louis and Charles Tulasne who had discovered that two species (Sebacina incrustans and Sebacina epigaea) previously referred to Corticium or Thelephora possessed septate basidia, similar to those found in the genus Tremella . Although it was unusual at that time to separate fungal genera on purely microscopic characters, Sebacina was erected for effused, Corticium-like fungi with tremelloid basidia. [1]

Subsequent authors added many additional species of corticioid fungi with septate basidia to the genus. Most, however, proved unrelated to Sebacina. In 1957 Ervin referred some Sebacina species to Heterochaetella, Bourdotia , and Exidiopsis . [2] In 1961, Wells transferred all Sebacina species having clamp connections on their hyphae to the genus Exidiopsis, [3] retaining Sebacina for the minority of species lacking clamp connections.

Current status

Molecular research, based on cladistic analysis of DNA sequences, has shown that Sebacina as previously understood includes the genus Tremellodendron (established for a group of species with coral-like basidiocarps), [4] [5] but does not include some species that are not closely related to the type. These latter species have been placed in the genera Helvellosebacina and Paulisebacina . [6]

Description

Fruit bodies are typically cartilaginous or rubbery-gelatinous. In effused species (those that spread out loosely or flat), they are formed on the soil surface or in leaf litter, often encrusting fallen twigs and debris, sometimes encrusting the stem bases of living plants. In the type species, irregular or coral-like outgrowths may also be produced. [2] In some species, fruit bodies are entirely coral- or net-like. [7] [6] Spores are white in mass. [2]

Microscopic characters

Fruit bodies are composed of hyphae lacking clamp connections in a gelatinous matrix. In several species the hyphal system is dimitic. The spore-bearing surface is initially covered in a layer of weakly branched hyphidia below which the basidia are formed. The basidia are tremelloid (ellipsoid and vertically septate), giving rise to long, sinuous sterigmata or epibasidia on which the basidiospores are produced. These spores are typically ellipsoid to oblong. [6]

Mycorrhizal associations

Sebacina species were assumed to be saprotrophic until DNA analysis of mycorrhizal roots showed that they were ectomycorrhizal plant associates. [8] [9]

Related Research Articles

<i>Helicobasidium purpureum</i> Species of fungus

Helicobasidium purpureum is a species of fungus in the subdivision Pucciniomycotina. Basidiocarps are corticioid (patch-forming) and are typically violet to purple. Microscopically they have auricularioid basidia. Helicobasidium purpureum is an opportunistic plant pathogen and is one of the causes of violet root rot of crops and other plants. DNA sequencing suggests that it is a complex of more than one species. The species has a conidia-bearing anamorph in the Tuberculina persicina complex that is a parasite of rust fungi.

Helicobasidium longisporum is a species of fungus in the subdivision Pucciniomycotina. Basidiocarps are corticioid (patch-forming) and are typically violet to purple. Microscopically they have auricularioid basidia. Helicobasidium longisporum is an opportunistic plant pathogen and is one of the causes of violet root rot of crops and other plants. DNA sequencing suggests that it is a complex of more than one species.

Helicobasidium mompa is a species of fungus in the subdivision Pucciniomycotina. Basidiocarps are corticioid (patch-forming) and are typically violet to purple. Microscopically they have auricularioid basidia. Helicobasidium mompa is an opportunistic plant pathogen and is one of the causes of violet root rot of crops and other plants. DNA sequencing suggests that it is a distinct, eastern Asian species.

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

The Tremellaceae are a family of fungi in the order Tremellales. The family is cosmopolitan and contains both teleomorphic and anamorphic species, most of the latter being yeasts. All teleomorphs in the Tremellaceae are parasites of other fungi, though the yeast states are widespread and not restricted to hosts. Basidiocarps, when produced, are gelatinous.

<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.

<span class="mw-page-title-main">Sebacinaceae</span> Genus of fungi

The Sebacinaceae are a family of fungi in the order Sebacinales. Species produce basidiocarps (fruit bodies} that are gelatinous or cartilaginous and variously corticioid, clavarioid, bracket-like, or jelly-like. Microscopically, all have septate basidia and hyphae lacking clamp connections. Many but not all species are mycorrhizal, forming associations with a wide range of plants.

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

The Hyaloriaceae are a family of fungi in the order Auriculariales. Species within the family have gelatinous basidiocarps that produce spores on septate basidia and, as such, were formerly referred to the "heterobasidiomycetes" or "jelly fungi". All appear to be saprotrophic, growing on dead wood or plant remains. Less than 30 species are currently included within the Hyaloriaceae, but the family has not been extensively researched.

<i>Exidia</i> Genus of fungi

Exidia is a genus of fungi in the family Auriculariaceae. The species are saprotrophic, occurring in attached or recently fallen dead wood, and produce gelatinous basidiocarps. The fruit bodies are diverse, pustular, lobed, button-shaped or cup-shaped. Several species, including the type species Exidia glandulosa, have sterile pegs or pimples on their spore-bearing surface. The genus has a cosmopolitan distribution and around 20 species are currently recognized worldwide. Initial molecular research indicates the genus is artificial.

<i>Tremella</i> Genus of fungi

Tremella is a genus of fungi in the family Tremellaceae. All Tremella species are parasites of other fungi and most produce anamorphic yeast states. Basidiocarps, when produced, are gelatinous and are colloquially classed among the "jelly fungi". Over 100 species of Tremella are currently recognized worldwide. One species, Tremella fuciformis, is commercially cultivated for food.

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

The corticioid fungi are a group of fungi in the Basidiomycota typically having effused, smooth basidiocarps that are formed on the undersides of dead tree trunks or branches. They are sometimes colloquially called crust fungi or patch fungi. Originally such fungi were referred to the genus Corticium and subsequently to the family Corticiaceae, but it is now known that all corticioid species are not necessarily closely related. The fact that they look similar is an example of convergent evolution. Since they are often studied as a group, it is convenient to retain the informal (non-taxonomic) name of "corticioid fungi" and this term is frequently used in research papers and other texts.

<i>Ceratobasidium</i> Genus of fungi

Ceratobasidium is a genus of fungi in the order Cantharellales. Basidiocarps are effused and the genus is sometimes grouped among the corticioid fungi, though species also retain features of the heterobasidiomycetes. Anamorphic forms were formerly referred to the genus Ceratorhiza, but this is now considered a synonym of Rhizoctonia. Ceratobasidium species, excluding the type, are also now considered synonymous with Rhizoctonia and some species have been transferred to the latter genus. Species are saprotrophic, but several are also facultative plant pathogens, causing a number of commercially important crop diseases. Some are also endomycorrhizal associates of orchids.

<i>Tulasnella</i> Genus of fungi

Tulasnella is a genus of effused (patch-forming) fungi in the order Cantharellales. Basidiocarps, when visible, are typically smooth, ceraceous (waxy) to subgelatinous, frequently lilaceous to violet-grey, and formed on the underside of fallen branches and logs. They are microscopically distinct in having basidia with grossly swollen sterigmata on which basidiospores are formed. One atypical species, Tulasnella aurantiaca, produces orange to red, gelatinous, pustular anamorphs on wood. Some species form facultative mycorrhizas with orchids and liverworts. Around 80 species of Tulasnella are known worldwide.

<i>Botryobasidium</i> Genus of fungi

Botryobasidium is a genus of corticioid fungi belonging to the order Cantharellales. Basidiocarps are ephemeral and typically form thin, web-like, white to cream, effused patches on the underside of fallen branches, logs, and leaf litter. Several species form anamorphs producing chlamydospores. All species are wood- or litter-rotting saprotrophs and the genus has a worldwide distribution.

Colacogloea is a genus of fungi belonging to the class Microbotryomycetes. Most species in the genus are known only from their yeast states. Where known, basidiocarps have auricularioid basidia and occur as parasites on or in the fruit bodies of other fungi.

<i>Naematelia</i> Genus of fungi

Naematelia is a genus of fungi in the family Naemateliaceae. All Naematelia species are parasites of other fungi and produce anamorphic yeast states. When produced, Basidiocarps ,, are gelatinous and are colloquially classed among the "jelly fungi."Four species of Naematelia are currently recognized worldwide. One species, Naematelia aurantialba, is commercially cultivated for food.

Pseudotremella is a genus of fungi in the family Bulleraceae. All Pseudotremella species are parasites of other fungi and produce anamorphic yeast states. Basidiocarps, when produced, are gelatinous and are colloquially classed among the "jelly fungi". Four species of Pseudotremella are currently recognized worldwide. Two of these species are, as yet, only known from their yeast states.

<i>Sebacina sparassoidea</i> Species of fungus

Sebacina sparassoidea, the white coral jelly fungus, is a species of fungus in the family Sebacinaceae. Its coral-like basidiocarps are typically a yellowish off-white and have a gelatinous and elastic texture. Found in eastern North America, in humid environments amongst rotting logs of deciduous trees, particularly oaks, it is often observed growing throughout the months of August to September.

<i>Myxarium</i> Genus of fungi

Myxarium is a genus of fungi in the family Hyaloriaceae. Basidiocarps are gelatinous and effused or pustular. The genus is cosmopolitan. All species grow on dead wood or dead herbaceous stems.

<i>Sirobasidium</i> Genus of fungi

Sirobasidium is a genus of fungi in the order Tremellales. Basidiocarps are gelatinous and appear to be parasitic on ascomycetous fungi on wood. Microscopically they are distinguished by producing septate basidia in chains which give rise to deciduous sterigmata. Species are distributed worldwide.

References

  1. Tulasne LR; Tulasne C. (1871). "New notes upon the tremellineous fungi and their analogues". Journal of the Linnean Society, Botany. 13 (65): 31–42. doi:10.1111/j.1095-8339.1871.tb00079.x.
  2. 1 2 3 Ervin MD. (1957). "The genus Sebacina". Mycologia. 49 (1): 118–23. doi:10.2307/3755737. JSTOR   3755737.
  3. Wells K. (1961). "Studies of some Tremellaceae IV. Exidiopsis". Mycologia. 53 (4): 317–70. doi:10.2307/3756581. JSTOR   3756581.
  4. Atkinson GF. (1902). "Preliminary notes on two new genera of Basidiomycetes". Journal of Mycology. 8 (2): 106–107. doi:10.2307/3752542. JSTOR   3752542.
  5. Bodman MC. (1942). "The genus Tremellodendron". American Midland Naturalist. 27 (1): 203–216. doi:10.2307/2421035. JSTOR   2421035.
  6. 1 2 3 Oberwinkler F; Riess K; Bauer R; Garnica S. (2014). "Morphology and molecules: the Sebacinales, a case study". Mycological Progress. 13: 445–470. doi:10.1007/s11557-014-0983-1.
  7. Roberts P. (2004). "Sebacina concrescens and S. sparassoidea: two conspicuous but neglected North American Sebacina species". Sydowia. 55: 348–54.
  8. Selosse M-A; Bauer R; Moyersoen B. (2002). "Basal hymenomycetes belonging to the Sebacinaceae are ectomycorrhizal on temperate deciduous trees". New Phytologist. 155 (1): 183–95. doi: 10.1046/j.1469-8137.2002.00442.x . JSTOR   1513894. PMID   33873297.
  9. Weiss M; Selosse MA; Rexer KH; Urban A; Oberwinkler F. (2004). "Sebacinales: a hitherto overlooked cosm of heterobasidiomycetes with a broad mycorrhizal potential". Mycological Research. 108 (Pt 9): 1003–10. doi:10.1017/S0953756204000772. PMID   15506013.