Helotiales is an order of the class

Leotiomycetes The Leotiomycetes are a class of ascomycete fungi. Many of them cause serious plant diseases. Systematics The class Leotiomycetes contains numerous species with an anamorph placed within the ''fungi imperfecti'' (deuteromycota), that have only ...

within the division

Ascomycota Ascomycota is a phylum of the kingdom Fungi that, together with the Basidiomycota, forms the subkingdom Dikarya. Its members are commonly known as the sac fungi or ascomycetes. It is the largest phylum of Fungi, with over 64,000 species. The def ...

. The taxonomy within Helotiales has been debated. It has expanded significantly as genomic techniques for taxonomical identification have become more commonly used. , the order is estimated to contain 30 accepted families, 519 genera, and 6266 species. Helotiales is the largest order of non-stromatic discomycetes that usually, but not always, have brightly coloured apothecia. Many members of the family have obviously cup-shaped

ascomata An ascocarp, or ascoma (), is the fruiting body ( sporocarp) of an ascomycete phylum fungus. It consists of very tightly interwoven hyphae and millions of embedded asci, each of which typically contains four to eight ascospores. Ascocarps are mos ...

with little or no stipes. They are usually found fruiting on coarse or large wood debris as well as on other organic matter. Part of these discomycetes are limited to a specific

host range In biology and medicine, a host is a larger organism that harbours a smaller organism; whether a parasitic, a mutualistic, or a commensalist ''guest'' (symbiont). The guest is typically provided with nourishment and shelter. Examples include a ...

, this goes as far as to not just being limited to one particular plant, additionally some species need a particular part of that plant.

Description

*Helotiales is distinguished by its disc or cup-shaped

apothecia An ascocarp, or ascoma (), is the fruiting body ( sporocarp) of an ascomycete phylum fungus. It consists of very tightly interwoven hyphae and millions of embedded asci, each of which typically contains four to eight ascospores. Ascocarps are mos ...

. *Its asci are only slightly thickened in contrast to other

*Most Helotiales species live as

saprobe Saprotrophic nutrition or lysotrophic nutrition is a process of chemoheterotrophic extracellular digestion involved in the processing of decayed (dead or waste) organic matter. It occurs in saprotrophs, and is most often associated with fungi ( ...

s on soil

humus In classical soil science, humus is the dark organic matter in soil that is formed by the decomposition of plant and animal matter. It is a kind of soil organic matter. It is rich in nutrients and retains moisture in the soil. Humus is the Lati ...

, dead logs, manure and other organic matter. *The order includes most fungi that engage in

ericoid mycorrhiza The ericoid mycorrhiza is a mutualistic relationship formed between members of the plant family Ericaceae and several lineages of mycorrhizal fungi. This symbiosis represents an important adaptation to acidic and nutrient poor soils that specie ...

, including ''Rhizoscyphus ericae'', ''Meliniomyces'' species and ''Cairneyella variabilis''. *The order contains some of the most severe plant

pathogen In biology, a pathogen ( el, πάθος, "suffering", "passion" and , "producer of") in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ ...

s such as ''

Monilinia fructicola ''Monilinia fructicola'' is a species of fungus in the order Helotiales. A plant pathogen, it is the causal agent of brown rot of stone fruits. Stone fruit (summer fruit) Stone fruits such as apricot and peaches originated in China and spread t ...

'' ( brown rot on

stone fruit In botany, a drupe (or stone fruit) is an indehiscent fruit in which an outer fleshy part ( exocarp, or skin, and mesocarp, or flesh) surrounds a single shell (the ''pit'', ''stone'', or ''pyrena'') of hardened endocarp with a seed (''kernel' ...

s), ''

Sclerotinia sclerotiorum ''Sclerotinia sclerotiorum'' is a plant pathogenic fungus and can cause a disease called white mold if conditions are conducive. ''S. sclerotiorum'' can also be known as cottony rot, watery soft rot, stem rot, drop, crown rot and blossom blight. ...

'' ( lettuce drop and other diseases), ''D. rosae'' (black spot of roses), ''

Sclerotium cepivorum ''Stromatinia cepivora'' is a fungus in the division Ascomycota. It is the teleomorph of ''Sclerotium cepivorum'', the cause of white rot in onions, garlic, and leeks. The infective sclerotia remain viable in the soil for many years and are s ...

'' ( soft rot of onions) and ''

Botrytis cinerea ''Botrytis cinerea'' is a necrotrophic fungus that affects many plant species, although its most notable hosts may be wine grapes. In viticulture, it is commonly known as "botrytis bunch rot"; in horticulture, it is usually called "grey mould" or ...

''.

Families

*'' Amicodiscaceae'' *''

Arachnopezizaceae Arachnopezizaceae is a family of fungi belonging to the order Helotiales Helotiales is an order of the class Leotiomycetes within the division Ascomycota. The taxonomy within Helotiales has been debated. It has expanded significantly as genomic ...

'' *'' Bryoglossaceae'' *'' Cenangiaceae'' *''

Chlorociboriaceae The Chlorociboriaceae are a family of "cup fungi" in the order Helotiales, with type genus In biological taxonomy, the type genus is the genus which defines a biological family and the root of the family name. Zoological nomenclature Accord ...

'' *'' Chlorospleniaceae'' *'' Chrysodiscaceae'' *''

Dermateaceae The Dermateaceae is a family of cup fungi in the order Helotiales. Most species in this family are plant pathogens but some are saprobes. Genera This is a list of genera in the family, based on the 2007 Outline of Ascomycota. '' Aivenia'' &mda ...

'' *'' Discinellaceae'' *'' Drepanopezizaceae'' *'' Gelatinodiscaceae'' *'' Godroniaceae'' *'' Hamatocanthoscyphaceae'' *''

Helotiaceae The Helotiaceae are a family of fungi in the order Helotiales. The distribution of species in the family are widespread, and typically found in tropical areas. There are 117 genera and 826 species in the family. A question mark after the genus ...

'' *'' Hemiphacidiaceae'' *'' Heterosphaeriaceae'' *'' Hyaloscyphaceae'' *'' Hydrocinaceae'' *'' Lachnaceae'' *'' Loramycetaceae'' *'' Mitrulaceae'' *''

Mollisiaceae Mollisiaceae is a family (biology), family of fungi in the order Helotiales. It contains almost 800 species in 17 genus, genera with multiple genera remaining undescribed. Saprotrophs and root endophytes are prominent in the family but it also in ...

'' *'' Neolauriomycetaceae'' *'' Pleuroascaceae'' *'' Ploettnerulaceae'' *'' Rutstroemiaceae'' *''

Sclerotiniaceae The Sclerotiniaceae are a family of fungi in the order Helotiales. Many species in this family are plant pathogens. Genera * '' Asterocalyx'' * ''Botryotinia'' * ''Botrytis'' * '' Ciboria'' * '' Ciborinia'' * '' Coprotinia'' * '' Cudoniopsis'' ...

'' *'' Solenopeziaceae'' *'' Tympanidaceae'' *'' Vibrisseaceae''

Disputed or previously included families

Amorphothecaceae The Amorphothecaceae are a family of fungi in the division Ascomycota. This family can not yet be taxonomically classified in any of the ascomycetous classes and orders with any degree of certainty (incertae sedis). It contains the single genu ...

- Kirk (2008) assigned to Helotiales, but reclassified under order

Erysiphales Erysiphales are an order of ascomycete fungi. The order contains one family, Erysiphaceae. Many of them cause plant diseases called powdery mildew. Systematics The order contains one family (Erysiphaceae), 28 genera and approximately 100 speci ...

. * Ascocorticiaceae - reclassified under order Medeolariales *

Phacidiaceae The Phacidiaceae are a family of fungi in the order Helotiales. According to a 2008 estimate, the family contained seven genera and 148 species. Genera As accepted by GBIF; * '' Allantophomopsiella'' (1) * '' Allantophomopsis'' (5) * '' Ap ...

(also known as Bulgariaceae) - reclassified under order Phacidiales * Vandijckellaceae - identified by Crous et al. (2017), not widely accepted. File:Chlorociboria-aeruginascens.jpg, Green Elfcup or Green Wood Cup '' Chlorociboria aeruginascens'',

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

(photo: Holger Krisp) File:Leeuwenhorstbos - Ascocoryne.jpg, Ascocoryne, family:

File:Mollisia benesuada (Tul.) W. Phillips 718024.jpg, ''

Mollisia ''Mollisia'' is a genus of fungi in the family Dermateaceae. The genus contains 121 species. Species *'' Mollisia amenticola'' *'' Mollisia aquosa'' *'' Mollisia caesia'' *'' Mollisia caespiticia'' *'' Mollisia caricina'' *'' Mollisia casaresia ...

benesuada'', family:

File:Bisporella citrina 59079.jpg, '' Bisporella citrina'', family:

File:Arachnopeziza aurata 57007696.jpg, ''Arachnopeziza aurata'', family: Hyaloscyphaceae File:Eichen-Stromabecher Rutstroemia firma.jpg, Brown oak disk cup ''Rutstroemia firma'', family: Rutstroemiaceae
(photo: Holger Krisp) File:Botrytis conidiophores 16X.png, The necrotrophic fungus ''Botrytis conidiophores'', Magnification X16 , family: Sclerotinaceae File:Vibrissea truncorum (Alb. & Schwein.) Fr 335788.jpg, ''Vibrissea truncorum'', family: Vibrisseaceae
image source: Mushroom Observer

References

{{Taxonbar, from=Q134490 Leotiomycetes Ascomycota orders

Description

Families

Disputed or previously included families

See also

References