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Oak wilt is a fungal disease caused by the organism Bretziella fagacearum that threatens Quercus spp. The disease is limited to the eastern half of the United States; first described in the 1940s in the Upper Mississippi River Valley. The pathogen penetrates xylem tissue, preventing water transport and causing disease symptoms. Symptoms generally consist of leaf discoloration, wilt, defoliation, and death. The disease is dispersed by insect vectors and to adjacent trees through underground root networks. However, human spread is the most consequential dispersal method. Moving firewood long distances can potentially transport diseases and invasive species.
The Nectriaceae comprise a family of fungi in the order Hypocreales. It was circumscribed by brothers Charles and Louis René Tulasne in 1865. In 2020, an Outline of fungi was produced and listed 70 genera and about 1,336 species.
Thielaviopsis is a small genus of fungi in the order Microascales, and family Ceratocystidaceae. The genus includes several important agricultural based pathogens. The most widespread is T. basicola, the causal agent in several root rot diseases of economically important crop species including cotton and a variety of vegetables. In cotton, Thielaviopsis causes root rot, also known as black root rot, which causes necrosis of the roots and stunting of the crop plants.
Histone deacetylase 1 (HDAC1) is an enzyme that in humans is encoded by the HDAC1 gene.
Histone deacetylase 2 (HDAC2) is an enzyme that in humans is encoded by the HDAC2 gene. It belongs to the histone deacetylase class of enzymes responsible for the removal of acetyl groups from lysine residues at the N-terminal region of the core histones. As such, it plays an important role in gene expression by facilitating the formation of transcription repressor complexes and for this reason is often considered an important target for cancer therapy.
The Ophiostomataceae are a family of fungi in the Ascomycota, class Sordariomycetes. The family was circumscribed by J.A. Nannfeldt in 1932. Species in the family have a widespread distribution, and are typically found in temperate regions, as pathogens of both coniferous and deciduous trees.
Ophiostoma is a genus of fungi within the family Ophiostomataceae. It was circumscribed in 1919 by mycologists Hans Sydow and Paul Sydow.
Grosmannia clavigera is a species of sac fungus that causes blue stain in wood. It spreads to lodgepole pine, ponderosa pine, Douglas-fir, and whitebark pine trees from the body and a special structure in the heads of mountain pine beetles. The blue stain fungus has evolved a relationship with mountain pine beetles that allow them to travel from tree to tree on a special structure in the beetle's heads and stops the tree from producing resin to pitch out or kill the beetle, encouraging the pine beetle infestation occurring all along the Rocky Mountains from Mexico into Canada. The beetles are able to mine and lay eggs while avoiding the tree's defenses. The 33 Mb genome of this fungus was sequenced in 2009.
Lasiodiplodia is a genus of fungi in the family Botryosphaeriaceae. There were about 21 species. Lasiodiplodia, commonly referred to as black-soot disease, is a significant pathogen in tropical forestry.
Ceratocystis is a genus of fungi in the family Ceratocystidaceae. Several species are important plant pathogens, causing diseases such as oak wilt and pineapple black rot.
The Ceratocystidaceae are a family of fungi in the class Sordariomycetes, subclass Hypocreomycetidae.
Ambrosiella is a genus of ambrosia fungi within the family Ceratocystidaceae. It was circumscribed by mycologists Josef Adolph von Arx and Grégoire L. Hennebert in 1965 with Ambrosiella xylebori designated as the type species. All Ambrosiella species are obligate symbionts of ambrosia beetles. Several former species were moved to genera Raffaelea, Hyalorhinocladiella, or Phialophoropsis, and there were nine species recognized 2017. Twelve species in as of 2023. One species, Ambrosiella cleistominuta, has been observed to produce a fertile sexual state with cleistothecious ascomata.
Gabarnaudia is a genus of anamorphic fungi that was placed in the family Ceratocystidaceae, until phylogenetic analysis by Hausner and Reid (2004) and De Beer et al. (2013a) showed that Gabarnaudia fimicolaG. betae and G. humicola clustered within genus Sphaeronaemella.
Sporothrix is a ubiquitous genus of soil-dwelling fungus discovered by Schenck in 1898, and studied in more detail by Hektoen and Perkins. The first described and best known species is Sporothrix schenckii, the causative agent of rose handler's disease. New environmental, and pathogenic, species have been discovered with the potential for more to be found as molecular techniques advance.
The Coniochaeta are a genus of pleomorphic yeasts of the order Coniochaetales and are pathogens of trees. Some species have also been found to form endophytic associations within plants in which they live inside plant tissues but do not actually harm the organism. They can take the form of pink to brown colonies, hyphae, conidiophores or sclerotia. In 2013, the Lecythophora were merged with the Coniochaeta, following suggestions by Ziauddin Khan et al.
Raffaelea is a genus of ambrosia fungi in the family Ophiostomataceae. It was circumscribed by mycologists Josef Adolph von Arx and Grégoire L. Hennebert in 1965 with Raffaelea ambrosiae as the type species. The genus is named in honor of Italian botanist Raffaele Ciferri.
Ambrosiella roeperi is the fungal symbiont of the granulate ambrosia beetle, Xylosandrus crassiusculus, facilitating this insect’s capacity to accumulate on and damage a diverse array of woody plants from around the world. It is one of several important nutritional partners derived from order Microascales that sustain and are transported by xylomycetophagous scolytine beetles.
References
- ↑ Wijayawardene, Nalin; Hyde, Kevin; Al-Ani, Laith Khalil Tawfeeq; Somayeh, Dolatabadi; Stadler, Marc; Haelewaters, Danny; et al. (2020). "Outline of Fungi and fungus-like taxa". Mycosphere. 11: 1060–1456. doi: 10.5943/mycosphere/11/1/8 . hdl: 10481/61998 .
- 1 2 "Species Fungorum - Search Page - Endoconidiophora". www.speciesfungorum.org. Retrieved 22 July 2023.