| Pyriculariaceae | |
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| Macgarvieomyces juncicola | |
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| Family: | Pyriculariaceae S. Klaubauf, M.H. Lebrun & P.W. Crous (2014) |
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See text. | |
The Pyriculariaceae are a family of ascomycete fungi in the order Magnaporthales. It was introduced by S. Klaubauf, M.H. Lebrun & P.W. Crous in 2014. [1]
Type genus: Pyricularia Sacc. 1880
Type species: Pyricularia grisea Sacc. 1880
The polyphyletic nature of Pyricularia has been resolved in 2014 leading to the definition of a new family, the Pyriculariaceae. [1] Phylogenetic analysis showed that three clear clades could be distinguished. One clade corresponds to Magnaporthaceae (based on Nakataea ), and two other clades were defined as new families: Pyriculariaceae (based on Pyricularia), and Ophioceraceae (based on Ophioceras ).
The Pyriculariaceae that reproduce sexually form perithecial fruiting bodies (ascomata), which are immersed, black and with long cylindrical necks covered in setae. Asci are subcylindrical, unitunicate, short-stipitate and with a large apical ring staining in Meltzer's iodine reagent. Ascospores are septate and fusiform.
Asexual morphs are hyphomycetes with simple, branched conidiophores. Asexual spores (conidia) are hyaline to brown in colour with transverse septa. The typical pyriform shape and 2-septate conidium morphology is characteristic for Pyricularia and Neopyricularia. Other genera have obclavate to more ellipsoid 2-septate conidia. Deightoniella and Macgarvieomyces evolved 1-septate conidia. [1]
An identification key to genera of Pyriculariaceae is provided by Maharachchikumbura et al (2016). [2]
Pyriculariaceae is distinguished from Magnaporthaceae by their asexual morphs. Pyricularia or pyricularia-like species are characterised by pyriform 2-septate conidia and rhexolytic secession. In the case of Magnaporthaceae, morphology of phialophora- or harpophora-like species is characterised by falcate versicoloured conidia on brown, erect conidiophores. [1]
Pyriculariaceae are saprobic or plant pathogenic fungi on various plant hosts, commonly on monocots. [2] Their host spectrum includes many grasses (Poaceae), and also ginger, sedges, rushes and commelina.
Blast diseases by Pyriculariaceae are caused by use of an appressorium to penetrate the host. [3]
Species of Pyriculariaceae cause major diseases on grasses, among which Pyricularia oryzae (sexual morph Magnaporthe oryzae) is responsible for the devastating disease of rice (rice blast). P. oryzae can also infect other host plants, such as Eleusine , Oryza , Setaria or Triticum . Other Pyricularia species can infect Cenchrus , Echinochloa , Lolium , Pennisetum or Zingiber .
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 defining feature of this fungal group is the "ascus", a microscopic sexual structure in which nonmotile spores, called ascospores, are formed. However, some species of the Ascomycota are asexual, meaning that they do not have a sexual cycle and thus do not form asci or ascospores. Familiar examples of sac fungi include morels, truffles, brewers' and bakers' yeast, dead man's fingers, and cup fungi. The fungal symbionts in the majority of lichens such as Cladonia belong to the Ascomycota.
A conidium, sometimes termed an asexual chlamydospore or chlamydoconidium, is an asexual, non-motile spore of a fungus. The word conidium comes from the Ancient Greek word for dust, κόνις (kónis). They are also called mitospores due to the way they are generated through the cellular process of mitosis. They are produced exogenously. The two new haploid cells are genetically identical to the haploid parent, and can develop into new organisms if conditions are favorable, and serve in biological dispersal.
Magnaporthe grisea, also known as rice blast fungus, rice rotten neck, rice seedling blight, blast of rice, oval leaf spot of graminea, pitting disease, ryegrass blast, Johnson spot, neck blast, wheat blast and Imochi (稲熱), is a plant-pathogenic fungus and model organism that causes a serious disease affecting rice. It is now known that M. grisea consists of a cryptic species complex containing at least two biological species that have clear genetic differences and do not interbreed. Complex members isolated from Digitaria have been more narrowly defined as M. grisea. The remaining members of the complex isolated from rice and a variety of other hosts have been renamed Magnaporthe oryzae, within the same M. grisea complex. Confusion on which of these two names to use for the rice blast pathogen remains, as both are now used by different authors.
Botryosphaeria dothidea 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.
Sarocladium oryzae (Sawada) is a plant pathogen causing the Sheath rot disease of rice and Bamboo blight of Bambusoideae spp. in Asia.
Cercospora melongenae is a fungal plant pathogen that causes leaf spot on eggplant. It is a deuteromycete fungus that is primarily confined to eggplant species. Some other host species are Solanum aethiopicum and Solanum incanum. This plant pathogen only attacks leaves of eggplants and not the fruit. It is fairly common among the fungi that infect community gardens and home gardens of eggplant. Generally speaking, Cercospora melongenae attacks all local varieties of eggplants, but is most severe on the Philippine eggplant and less parasitic on a Siamese variety.
Mycosphaerella is a genus of ascomycota. With more than 10,000 species, it is the largest genus of plant pathogen fungi.
The Magnaporthaceae are a family of fungi in the order Magnaporthales. It was circumscribed by Paul F. Cannon in 1994 for a group of grass-associated fungi centered on Magnaporthe (Nakataea). Magnaporthaceae have a harpophora-like asexual morphology and are often associated with roots of grasses or cereals.
Pyricularia is a genus of fungi which was named by Saccardo in 1880.
Coniothyrium is a genus of fungi in the family Coniothyriaceae. The genus was circumscribed by Czech mycologist August Carl Joseph Corda in 1840. It was formerly placed in the Phaeosphaeriaceae family until 1983 when the family was established.
Magnaporthe rhizophila is a fungus species in the family Magnaporthaceae. These dark mycelial fungi are common pathogens of cereal and grass roots. Rice blast is one disease known to be caused by M. rhizophila and presents with vascular discoloration in the host organism. The fungus lives best in drier humid conditions, explaining why it is most often found in the soils of Australia, South Africa, and the Southeastern United States.
The Sporocadaceae are a family of fungi, that was formerly in the order Xylariales. It was placed in the Amphisphaeriales order in 2020.
Neopestalotiopsis is a genus of plant pathogens in the family Sporocadaceae.
Pseudopestalotiopsis is a genus of plant pathogens in the family Sporocadaceae.
Sarcostroma is a genus of fungi in the family Sporocadaceae. Most species of this genus are saprobes, endophytes or pathogens on leaves.
Fuscosporellales is an order of fungi within the phylum of Ascomycota and in the class Sordariomycetes and subdivision of Pezizomycotina.
Savoryellaceae is a family of aquatic based fungi. It is the only family in the monotypic order Savoryellales within the class Sordariomycetes, division Ascomycota.
Pleurothecium is a genus of terrestrial and freshwater fungi in the family Pleurotheciaceae and the monotypic order Pleurotheciales. It is typified by Pleurothecium recurvatum as the type species (Morgan) Höhn, which has the synonym of Carpoligna pleurotheciiF.A. Fernández & Huhndorf, Mycologia 9: 253. 1999.
Pararamichloridium is a genus of fungi in the monotypic family Pararamichloridiaceae and within the monotypic order of Pararamichloridiales and also in the subclass Hypocreomycetidae. They are saprobic on wood in terrestrial and freshwater habitats.
Falcocladium is a genus of fungi, within the monotypic family FalcocladiaceaeSomrith., E.B.G. Jones & K.L. Pang, and within the monotypic order FalcocladialesR.H. Perera, Maharachch., Somrith., Suetrong & K.D. Hyde, within the class Dothideomycetes. They are saprobic on leaf litter, including the leaves of Eucalyptus grandis and Eucalyptus camaldulensis in tropical and terrestrial habitats.