Ustilaginales

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Ustilaginales
Huitlacoche.jpg
Huitlacoche
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Ustilaginomycetes
Subclass: Ustilaginomycetidae
Order: Ustilaginales
(G. Winter 1880) [1] Bauer & Oberwinkler 1997 [2]
Families

Anthracoideaceae
Clintamraceae
Geminaginaceae
Melanotaeniaceae
Pericladiaceae
Uleiellaceae
Ustilaginaceae
Websdaneaceae

Contents

The Ustilaginales are an order of fungi within the class Ustilaginomycetes. The order contained 8 families, 49 genera, and 851 species in 2008. [3]

In 2011, monotypic family Pericladiaceae Vánky holding just Pericladium Pass. (with 3 species) was added. [4] Also family Cintractiellaceae Vánky was later placed in a monotypic order Cintractiellales McTaggart & R.G. Shivas in 2020. [5]

Ustinaginales is also known and classified as the smut fungi. They are serious plant pathogens, with only the dikaryotic stage being obligately parasitic.

Morphology

Has a thick-walled resting spore (teliospore), known as the "brand" (burn) spore or chlamydospore.

Economic importance

They can infect corn plants ( Zea mays ) producing tumor-like galls that render the ears unsaleable. This corn smut , is also known as huitlacoche and sold canned for consumption in Latin America.

Sexual reproduction

Almost all Ustilaginales species share a dimorphic life cycle that includes an asexual, saprophitic yeast-like stage and a filamentous sexual stage that is required to parasitize a host. [6] The parasitic phase involves karyogamy, the process of fusing two haploid nuclei (present in haploid teliospore cells), followed by meiosis. [6] Each meiosis results in a septated basidium bearing four haploid basidiospores which can then proceed to yeast-like growth. During meiosis, genes are expressed that function in recombination and DNA repair. [6]

See also

Related Research Articles

<span class="mw-page-title-main">Basidiomycota</span> Division of fungi

Basidiomycota is one of two large divisions that, together with the Ascomycota, constitute the subkingdom Dikarya within the kingdom Fungi. Members are known as basidiomycetes. More specifically, Basidiomycota includes these groups: agarics, puffballs, stinkhorns, bracket fungi, other polypores, jelly fungi, boletes, chanterelles, earth stars, smuts, bunts, rusts, mirror yeasts, and Cryptococcus, the human pathogenic yeast.

<span class="mw-page-title-main">Corn smut</span> Fungal plant disease on maize and teosinte

Corn smut is a plant disease caused by the pathogenic fungus Mycosarcoma maydis. One of several cereal crop pathogens called smut, the fungus forms galls on all above-ground parts of corn species such as maize and teosinte. The infected corn is edible; in Mexico, it is considered a delicacy, called huitlacoche, often eaten as a filling in quesadillas and other tortilla-based dishes, as well as in soups.

<span class="mw-page-title-main">Biological life cycle</span> Series of stages of an organism

In biology, a biological life cycle is a series of stages of the life of an organism, that begins as a zygote, often in an egg, and concludes as an adult that reproduces, producing an offspring in the form of a new zygote which then itself goes through the same series of stages, the process repeating in a cyclic fashion.

<span class="mw-page-title-main">Smut (fungus)</span> Reproductive structure of fungi

The smuts are multicellular fungi characterized by their large numbers of teliospores. The smuts get their name from a Germanic word for 'dirt' because of their dark, thick-walled, and dust-like teliospores. They are mostly Ustilaginomycetes and comprise seven of the 15 orders of the subphylum. Most described smuts belong to two orders, Ustilaginales and Tilletiales. The smuts are normally grouped with the other basidiomycetes because of their commonalities concerning sexual reproduction.

<i>Ustilago</i> Genus of fungi

Ustilago is a genus of approximately 200 smut fungi, which are parasitic on grasses. 170 species are accepted by Wijayawardene et al. 2020; After phylogenetic research certain species in Ustilago, Macalpinomyces, and other genera in the Ustilaginaceae clade have been moved to other genera like Mycosarcoma.

<span class="mw-page-title-main">Saccharomycotina</span> Subdivision of fungi

Saccharomycotina is a subdivision (subphylum) of the division (phylum) Ascomycota in the kingdom Fungi. It comprises most of the ascomycete yeasts. The members of Saccharomycotina reproduce by budding and they do not produce ascocarps.

<span class="mw-page-title-main">Mating in fungi</span> Combination of genetic material between compatible mating types

Fungi are a diverse group of organisms that employ a huge variety of reproductive strategies, ranging from fully asexual to almost exclusively sexual species. Most species can reproduce both sexually and asexually, alternating between haploid and diploid forms. This contrasts with most multicellular eukaryotes such as mammals, where the adults are usually diploid and produce haploid gametes which combine to form the next generation. In fungi, both haploid and diploid forms can reproduce – haploid individuals can undergo asexual reproduction while diploid forms can produce gametes that combine to give rise to the next generation.

<span class="mw-page-title-main">Teliospore</span>

Teliospore is the thick-walled resting spore of some fungi, from which the basidium arises.

<span class="mw-page-title-main">Ustilaginomycotina</span> Subdivision of fungi

The Ustilaginomycotina is a subdivision within the division Basidiomycota of the kingdom Fungi. It consists of the classes Ustilaginomycetes and Exobasidiomycetes, and in 2014 the subdivision was reclassified and the two additional classes Malasseziomycetes and Monilielliomycetes added. The name was first published by Doweld in 2001; Bauer and colleagues later published it in 2006 as an isonym. Ustilagomycotina and Agaricomycotina are considered to be sister groups, and they are in turn sister groups to the subdivision Pucciniomycotina.

Sporisorium sorghi, commonly known as sorghum smut, is a plant pathogen that belongs to the Ustilaginaceae family. This fungus is the causative agent of covered kernel smut disease and infects sorghum plants all around the world such as Sorghum bicolor (sorghum), S. sudanense, S. halepense and Sorghumvulgare var. technichum (broomcorn). Ineffective control of S. sorghi can have serious economic and ecological implications.

Sporisorium reilianum Langdon & Full., (1978), previously known as Sphacelotheca reiliana, and Sporisorium reilianum, is a species of biotrophic fungus in the family Ustilaginaceae. It is a plant pathogen that infects maize and sorghum.

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

Entorrhizomycetes is the sole class in the phylum Entorrhizomycota, within the Fungi subkingdom Dikarya along with Basidiomycota and Ascomycota. It contains three genera and is a small group of teliosporic root parasites that form galls on plants in the Juncaceae (rush) and Cyperaceae (sedge) families. Prior to 2015 this phylum was placed under the subdivision Ustilaginomycotina. A 2015 study did a "comprehensive five-gene analyses" of Entorrhiza and concluded that the former class Entorrhizomycetes is possibly either a close sister group to the rest of Dikarya or Basidiomycota.

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

Pucciniomycetes is a diverse class of fungi in the subphylum Pucciniomycotina of phylum Basidiomycota. The class contains 5 orders, 21 families, 190 genera, and approximately 8,016 species. It has been estimated that this class contains about one third of all teleomorphic basidiomycetes. Pucciniomycetes contains many economically important plant pathogenic fungal rusts; the order Pucciniales is the largest clade in this class, representing approximately 7,000 species.

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

The Ustilaginaceae are a family of smut fungi in the order Ustilaginomycetes. Collectively, the family contains 17 genera and 607 species.

The Cintractiellaceae are a monotypic, family of smut fungi, in the order Cintractiellales, but unplaced beyond that. The family contains one genera, Cintractiella with 4 species. The family was circumscribed by mycologist Kálmán Vánky in 2003.

Yelsemia is a genus of smut fungi in the family Melanotaeniaceae, containing four species.

<span class="mw-page-title-main">Kálmán Vánky</span> Mycologist (1930–2021)

Kálmán Géza Vánky was a Hungarian mycologist with Swedish and Hungarian citizenship, who lived in Germany. He was considered to be the worldwide authority on the subject of smut fungi and has dominated the taxonomic study of Ustilaginomycetes for at least the past four decades.

Macalpinomyces is a fungus genus in the Ustilaginaceae family.

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

The Doassansiaceae are a family of fungi in the division Basidiomycota and order of Doassansiales. The family contains 11 genera and about 58 species. They have a widespread distribution. Doassansiaceae is also known and classified as a smut fungi.

<span class="mw-page-title-main">Rhamphospora nymphaeae</span> Species of fungi

The Rhamphosporaceae is a family of fungi in the division Basidiomycota and order of Doassansiales. The monotypic family only contains 1 genus; RhamphosporaD.D.Cunn. and just 1 species, Rhamphospora nymphaeaeD.D.Cunn. It is found on the leaves of waterlilies causing spots.

References

Notes
  1. Winter G. (1880). Rabenhorsts Kryptogamen-Flora von Deutschland, Oesterreich und der Schweitz, Vol. 1 (in German). Leipzig: E. Kummer. p. 73. (as "Ustilagineae")
  2. Bauer, R.; et al. (1997). "Ultrastructural markers and systematics in smut fungi and allied taxa". Canadian Journal of Botany. 75: 1311. doi:10.1139/b97-842.
  3. Kirk MP, Cannon PF, Minter DW, Stalpers JA (2008). Dictionary of the Fungi (10th ed.). Wallingford: CABI. pp.  716–17. ISBN   0-85199-826-7.
  4. Vánky, K. (2011). "The genus Pericladium (Ustilaginales). Pericladiaceae fam. nov". Mycologia Balcanica. 8 (2): 147–152.
  5. McTaggart, A.R.; Prychid, C.J.; Bruhl, J.J.; Shivas, R.G. (2020). "The PhyloCode applied to Cintractiellales, a new order of smut fungi with unresolved phylogenetic relationships in the Ustilaginomycotina". Fungal Systematics and Evolution. doi:10.3114/fuse.2020.06.04. PMC   7451774 .
  6. 1 2 3 Steins L, Guerreiro MA, Duhamel M, Liu F, Wang QM, Boekhout T, Begerow D (June 2023). "Comparative genomics of smut fungi suggest the ability of meiosis and mating in asexual species of the genus Pseudozyma (Ustilaginales)". BMC Genomics. 24 (1): 321. doi: 10.1186/s12864-023-09387-1 . PMC   10262431 . PMID   37312063.
Bibliography