Pleosporomycetidae

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Pleosporomycetidae
Leptorhaphis epidermidis.jpg
Leptorhaphis epidermidis growing on paper birch
Scientific classification Red Pencil Icon.png
Kingdom: Fungi
Division: Ascomycota
Class: Dothideomycetes
Subclass: Pleosporomycetidae
Orders

Pleosporomycetidae is a subclass of Dothideomycetes consisting of four orders: Pleosporales, Hysteriales, Mytilinidiales, and Jahnulales. [1] [2] One of its defining features is the presence of pseudoparaphyses. [3] These are sterile cells extending down from the upper portion of the cavity inside sexual structures containing the sac-like asci with sexually produced spores (ascospores). Pseudoparaphyses are initially attached at both their ends, but sometimes the upper part may become free. Some orders and families where these cells are present remain outside the subclass since DNA based phylogenies cannot place them with confidence. However they could conceivably be included within Pleosporomycetidae in future.

Dothideomycetes class of fungi

Dothideomycetes is the largest and most diverse class of ascomycete fungi. It comprises 11 orders 90 families, 1300 genera and over 19,000 known species. Traditionally, most of its members were included in the loculoascomycetes, which is not part of the currently accepted classification. This indicates that several traditional morphological features in the class are not unique and DNA sequence comparisons are important to define the class.

In biological classification, the order is

  1. a taxonomic rank used in the classification of organisms and recognized by the nomenclature codes. Other well-known ranks are life, domain, kingdom, phylum, class, family, genus, and species, with order fitting in between class and family. An immediately higher rank, superorder, may be added directly above order, while suborder would be a lower rank.
  2. a taxonomic unit, a taxon, in that rank. In that case the plural is orders.
Pleosporales order of fungi

The Pleosporales is the largest order in the fungal class Dothideomycetes. By a 2008 estimate it contains 23 families, 332 genera and more than 4700 species. The majority of species are saprobes on decaying plant material in fresh water, marine, or terrestrial environments, but several species are also associated with living plants as parasites, epiphytes or endophytes. The best studied species cause plant diseases on important agricultural crops e.g. Cochliobolus heterostrophus, causing southern corn leaf blight on maize, Phaeosphaeria nodorum causing glume blotch on wheat and Leptosphaeria maculans causing a stem canker on cabbage crops (Brassica). Some species of Pleosporales occur on animal dung and a small number occur as lichens and rock-inhabiting fungi.

Related Research Articles

Pezizomycotina subdivision of fungi

Pezizomycotina make up the majority of the Ascomycota fungi and include most lichenized fungi too. Pezizomycotina contains the filamentous ascomycetes and is a subdivision of the Ascomycota. It is more or less synonymous with the older taxon Euascomycota. These fungi reproduce by fission rather than budding and this subdivision includes almost all the ascus fungi that have fruiting bodies visible to the naked eye.

Pezizomycetes class of fungi

Pezizomycetes are a class of fungi within the division Ascomycota.

<i>Botryosphaeria dothidea</i> species of fungus

Botryosphaeria dothidea Ces. & De Not. is a plant pathogen that causes the formation of cankers on a wide variety of tree and shrub species. It has been reported on several hundred plant hosts and on all continents except Antarctica. B. dothidea was redefined in 2004, and some reports of its host range from prior to that time likely include species that have since been placed in another genus. Even so, B. dothidea has since been identified on a number of woody plants—including grape, mango, olive, eucalyptus, maple, and oak, among others—and is still expected to have a broad geographical distribution. While it is best known as a pathogen, the species has also been identified as an endophyte, existing in association with plant tissues on which disease symptoms were not observed. It can colonize some fruits, in addition to woody tissues.

<i>Phaeosphaeria nodorum</i> species of fungus

Phaeosphaeria nodorum is a major fungal pathogen of wheat and a member of the Dothideomycetes, a large fungal taxon that includes many important plant pathogens affecting all major crop plant families.

Gomphales order of fungi

The Gomphales are an order of basidiomycete fungi. Some or all families belonging to Gomphales have been sometimes included in the order Phallales, the now-obsolete Ramariaceae was also previously included in Cantharellales. Recent phylogenetic analyses include in Gomphales the families of the original description of the order by Walter Jülich, with addition of Clavariadelphaceae. According to one 2008 estimate, the Gomphales contain 18 genera and 336 species.

<i>Stagonospora</i> genus of fungi

Stagonospora is a genus of fungi clustering in the Phaeosphaeriaceae (Quaedvlieg). Several of the species in this genus are plant pathogens.

Dothideomycetidae subclass of fungi

Dothideomycetidae is a subclass of Dothideomycetes consisting of three orders: Dothideales, Myriangiales and Capnodiales. The cavities of the sexual structures do not have vertical cells growing between the sac-like cells bearing the sexual spores (asci).

Capnodiales order of fungi

Capnodiales is a diverse order of Dothideomycetes, initially based on the family Capnodiaceae, also known as sooty mold fungi. Sooty molds grow as epiphytes, forming masses of black cells on plant leaves and are often associated with the honeydew secreted by insects feeding on plant sap. This diverse order has been expanded by the addition of several families formerly thought unrelated and now also includes saprobes, endophytes, plant pathogens, lichens and rock-inhabiting fungi. The new additions include the genus Mycosphaerella containing the causal agents of several economically important crop and tree diseases. A small number of these fungi are also able to parasitise humans and animals, including species able to colonise human hair shafts.

Hysteriaceae family of fungi

The Hysteriaceae are a taxonomic family of fungi and the only extant family belonging to the order Hysteriales. Members of the Hysteriaceae are defined by the possession of a sexual structure called the hysterothecium, an elongated structure that opens by a longitudinal slit and releases sexually produced spores. The family is widely distributed, with many species found in temperate regions, and most are saprobic on wood and bark, although a few are parasitic on plants.

<i>Lophiostoma</i> genus of fungi

Lophiostoma is a genus of ascomycetous fungi in the family Lophiostomataceae.

The Hysteriales are an order of fungi in the class Dothideomycetes, subclass Pleosporomycetidae. It consists of a single family, Hysteriaceae. Members of Hysteriales produce elongated, often boat shaped sexual structures with slit-like openings (hysterothecia). However species with these structures are very diverse. Comparisons based on DNA sequences indicate species with hysterothecia do not share a single ancestor and therefore species with hysterothecia can be found in several fungal orders. The newest definition of the order relies on DNA sequence differences and a combination of morphological characters.

Leotiomyceta represents all the filamentous ascomycete fungi (Pezizomycotina), excluding the classes Pezizomycetes and Orbiliomycetes. It is well supported in several studies comparing DNA sequences in fungi. It has originally been proposed as a superclass but more recently was proposed as a rankless taxon for any well supported group above class. Rankless taxa do not strictly follow the rules for taxonomic classifications in plants and fungi (ICBN) and therefore these names are informal, although they appear to reflect natural groups.

Entylomatales order of fungi

The Entylomatales are an order of smut fungi in the class Exobasidiomycetes. A monotypic order, it consists of a single family, the Entylomataceae. Both the family and order were circumscribed in 1997.

The Microstromatales are order of fungi in the class Exobasidiomycetes. The order consists of three families: the Microstromataceae, the Quambalariaceae, and the Volvocisporiaceae.

The Davidiellaceae are a family of fungi in the Ascomycota, class Dothideomycetes. The family was defined in 2006 based on the results of molecular phylogenetic analysis of various Dothideomycetes species, and contains the genus Davidiella and six other genera.

Mytilinidiales is an order within the class Dothideomycetes.

Gloniaceae family of fungi

The Gloniaceae are a family of fungi in the order Mytilinidiales.

Didymellaceae family of fungi

The Didymellaceae are a family of fungi in the order Pleosporales.

References

  1. ↑ Schoch CL, Shoemaker RA, Seifert KA, Hambleton S, Spatafora JW, Crous PW, 2006. A multigene phylogeny of the Dothideomycetes using four nuclear loci. Mycologia 98, 1041–1052.
  2. ↑ Schoch CL, Crous PW, Groenewald JZ, Boehm EW, Burgess TI, de Gruyter J, de Hoog GS, Dixon LJ, Grube M, Gueidan C, Harada Y, Hatakeyama S, Hirayama K, Hosoya T, Huhndorf SM, Hyde KD, Jones EB, Kohlmeyer J, Kruys A, Li YM, Lucking R, Lumbsch HT, Marvanova L, Mbatchou JS, McVay AH, Miller AN, Mugambi GK, Muggia L, Nelsen MP, Nelson P, Owensby CA, Phillips AJ, Phongpaichit S, Pointing SB, Pujade-Renaud V, Raja HA, Plata ER, Robbertse B, Ruibal C, Sakayaroj J, Sano T, Selbmann L, Shearer CA, Shirouzu T, Slippers B, Suetrong S, Tanaka K, Volkmann-Kohlmeyer B, Wingfield MJ, Wood AR, Woudenberg JH, Yonezawa H, Zhang Y, Spatafora JW, 2009. A class-wide phylogenetic assessment of Dothideomycetes. Stud Mycol 64, 1-15S10. http://www.studiesinmycology.org/cgi/content/abstract/64/1/1
  3. ↑ Eriksson OE, 1981. The families of bitunicate ascomycetes. Opera Botanica 60, 1-220.
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