Ophiostoma ulmi is a species of fungus in the family ophiostomataceae. Ded was first noticed in 1919 by the dutch phytopathological service, when it was spread over large areas of belgium, the netherlands and part of northern france. The first symptoms are a circular necrotic area around the wound or branch junction. Dates are afflicted by a number of pests and diseases, which result in substantial losses. Functional annotation of the ophiostoma novoulmi genome.
It does not constitute a detailed pest risk analysis pra but includes. The american elm is extremely susceptible, and the disease has killed hundreds of thousands of them across. The mansonones were not detected on chromatographic analysis of extracts from healthy elm tissue. First record of ceratocystis laricicola ascomycota. Virtually since its type was described from sweet potatoes, the. Ceratocystis platani causes a disease in plane trees known as canker stain of plane uk english or canker of sycamore us english the disease is caused by the phytotoxin ceratoplatanin, which occurs in the cell wall of c. Cyclooxygenases cox have been proposed to modulate yeastmycelium dimorphism of ded fungi, and homologs of cox genes have been found in the nuclear genome of o. Hundreds of cankers caused by ceratocystis smalleyi are associated with hickory bark beetleattacked bitternut hickory exhibiting rapid crown. Kwaasi, in encyclopedia of food sciences and nutrition second edition, 2003. Harr ceratocystis platani is a fungal pathogen that causes canker stain of plane trees in the genus platanus.
Ceratocystis smalleyi colonization of bitternut hickory. It is a diverse species that attacks a wide variety of annual and perennial plants. Phytotoxin isolated from liquid cultures of ceratocystis ulmi. Midwest, from texas to minnesota, wisconsin and michigan, pennsylvania, west virginia and. Ophiostoma novo ulmi is not a single entity but exists as. Dutch elm disease and elm bark beetles iforest sisef. Synnemata produce conidia that are sticky and can be spread by vectors. General information about ceratocystis platani cerafp. This page was last edited on 19 december 2019, at 23. The predominant damage has occurred in the upper midwest although the range now extends from new york to texas.
Bakshi, transactions of the british mycological society 33 12. Oak wilt was first described in wisconsin in 1944 where trees were found dying in localized areas. Similar species both genera names ceratocystis and ophiostoma are commonly used. Dutch elm disease ded is a destructive disease of both native european and north american elms. The list is organized by the scientific name of the pathogen species capital letters, followed by the various susceptible plant hosts. Pdf screening european elms for resistance to ophiostoma novo. Perhaps the most indispensable fungus of all is an ascomycete. Electron microscopy of elm infected with ceratocystis ulmi. Ophiostoma novoulmi is highly virulent and can kill elm species that were tolerant to.
This was made possible by combining extensive conventional. Ophiostoma novoulmi is not a single entity but exists as. Ceratocystis platani cerafpoverview eppo global database. The latter exists in two forms, ean in eurasia and nan in north america, which subsequently invaded europe hoegger et al. In dutch elm disease, the vectors that transmit ophiostoma ulmi are scolytid beetles. Calmodulin levels in the yeast and mycelial phases of ceratocystis ulmi. While the latter, more aggressive, species is thought to have caused much of the ded through the 1970s and beyond, it was only recently recognized as a separate species. All structured data from the file and property namespaces is available under the creative commons cc0 license. Dutch elm disease is caused by three species of ascomycete fungi in the genus ophiostoma. The pathogenicity of ceratocystis montia to lodgepole pine gary a. Ceratocystis platani cerafpphotos eppo global database.
It is one of the causative agents of dutch elm disease. Pdf calmodulin levels in the yeast and mycelial phases. Field and culture tests of antibiotics against graphium ulmi. Dutch elm disease is caused by two closely related species of fungi. European and asiatic elms and zelkova moderately resistant. Vegetative incompatibility and potential involvement of a mycovirus in the italian population of geosmithia morbida. There are several hostspecialized strains, some of which, such as ceratocystis platani that attacks plane trees, are now described as distinct. Pdf resistance breeding of the native elms against dutch elm disease, caused by the fungus ophiostoma novoulmi brasier, is a major. Searching for the oak wilt pathogen, ceratocystis fagacearum. This may be seen on certain branches of the tree and on inspection under the bark the sapwood reveals brown streaks. Laboratoryplant disease diagnostic clinic, cornell university, ithaca, new york, usa. Ceratocystis laricicola is associated with large larch bark beetle ips cembrae living on larch.
Pdf phylogeny and taxonomy of the ophiostoma piceae complex. Even though new diseases keep emerging, the most important and widespread of these is bayoud disease, a fungal wilt disease of date trees caused by the fungus fusarium oxysporium f. The name refers to a closely related ceratocystis species also occurring on theobroma cacaofrom, the greek word plant pathogenic fungi that infect a diversity of agricultural and adelphe, which means sister. Ophiostoma ulmi formerly known as ceratocystis ulmi and o. The ascomycete fungus ophiostoma novoulmi is responsible for the pandemic of. Ceratocystis in index fungorum this sordariomycetesrelated article is a stub. These fungi have ascomata with round usually dark bases that are.
The name ceratocystis was revised by bakshi 1950 and hunt. The extent to which these antifungal compounds may contribute to. Strobel and fumio sugawara department of plant pathology, montana state university, bozeman, mt, u. Calmodulin levels in the yeast and mycelial phases of ceratocystis ulmi ganapathy muthukumar university of nebraskalincoln rajiv k.
The genus ceratocystis was established in 1890 and accommodates many important fungi. Searching for the oak wilt pathogen, ceratocystis fagacearum, in new york state emma rosenthal, karen snoverclift, sandra jensen. Ceratocystis was established in 1890 to accommodate c. The following is a list of the reported pathogens from this genus ceratocystis and the hosts they infect. It was then transferred to ophiostoma by melin and nannfeldt 1934 and to endoconidiophora by davidson 1935.
This compound induced disease symptoms, similar to those produced by the fungus itself, in elm sprouits and trees. Ceratocystis smalleyi colonization of bitternut hickory and host responses in the xylem by j. Pdf caiicalmodulin regulation of fungal dimorphism in. Elliott 1923, 1925 transferred ceratocystis fimbriata to ceratostomella. Genus ceratocystis 1cerag species ceratocystis platani cerafp. Isolation and identification of six mansonones from ulmus. The pathogenicity of ceratocystis montia to lodgepole pine.
Taxonomy, ecology, and pathogenicity 9780890541562. Other articles where ceratocystis ulmi is discussed. Ophistoma ulmi ceratocystis ulmi fungus spread by vectors that are native and european elm bark beetles all native ulmus elm species. Tissue cultures of ulmus and their interactions with.
Plane tree showing advanced dieback after 23 years, after infection by c. The fungus, thought to be native to southeastern united states, was introduced to italy in the 1940s believed to. Ceratocystis platani global invasive species database gisd 2015. Ceratocystis fagacearum fungus most species of oak including red oak, white oak, live oak, shumard oak, spanish oak, water oak, black jack oak. Ceratoulmin, a toxin produced by the pathogens of the. The management prac tices described in this publication can help minimize the risk of losing oaks to this disease. Although this is a longterm endeavor, combining desirable alleles from several genes. The metabolite was produced most prolifically by fluffy isolates obtained from the epidemic areas and less so by waxy isolates from the nonepidemic areas. Multiple ceratocystis smalleyi infections associated with reduced stem water transport in bitternut hickory. Rapid pest risk analysis for ceratocystis platani this document provides a rapid assessment of the risks posed by the pest to the uk in order to assist risk managers decide on a response to a new or revised pest threat. Rapid evolution of introduced plant pathogens via interspecific. These include serious plant pathogens, significant insect symbionts and agents of timber degradation that result in substantial economic losses. Though it can infect through leaves, petioles and young stems, the primary site of infection is a trunk wound.
This page was last edited on 19 december 2019, at 19. Ophiostoma ulmi can reproduce asexually by overwintering in both the bark and upper layers of dead or dying elm wood as mycelia and synnemata. Download citation on may 1, 2008, shozo takai and others published cerato. Biological control of dutch elm disease aps journals the. Oak wilt is a disease specific to oak trees, particularly red oaks, that is caused by the fungal pathogen. Mansonones a and c to g, sesquiterpene quinones possessing antifungal properties, were isolated from the elmulmus americana infected withceratocystis ulmi.
Elm trees were once an ecologically valuable tree that dominated mixed broadleaf forests, floodplains, and low. Multiple ceratocystis smalleyi infections associated with. Juzwik2,3 1korea forest research institute, seoul, republic of korea. Pdf vegetative incompatibility and potential involvement. Four ceratocystis species have been reported to occur in hawaii raabe, et al. This disease kills young and mature oak quercus trees and has been found in 22 states. It was first described under the name graphium ulmi, and later transferred to the genus ophiostoma dutch elm disease originated in europe in the early 1900s. We have shown that caii ions, ethylene glycolbis betaaminoethyl ethern,ntetraacetic acid, lacl3, and six known calmodulin inhibitors shift the yeastmycelium dimorphic potential of ceratocystis ulmi. A federal eradication campaign in the late 1930s and early 40s sharply reduced the numbers of infected elms but could not stop the diseases spread into regions wherever the very susceptible american elm ulmus americana grows. Moreau in american elm trees article in canadian journal of botany 4011. The disease was first identified in the united states in 1930. It is spread from tree to tree primarily by insects visiting wounds.
The sexual stage of ceratocystis is a perithecioid ascoma with a long neck and evanescent asci. Files are available under licenses specified on their description page. Metabolite of ceratocystis ulmi and its association with. Plant pathogen causing wilt disease on cacao, ficus, mango, and oak and causes cankers on a variety of plants. Of 10 isolates of ceratocystis ulmi collected in september, 1970, from eight trees of ulmus x hollandica cl. The genus now includes many important fungi including important pathogens of plants and the causal agents of sap stain in timber that are symbiotic associates of insects fig. A federal eradication campaign in the late 1930s and early 40s sharply reduced the numbers of infected elms but could. Disease survey records suggest that it had been present there since at least 1912. Phytotoxic material has been isolated from liquid cultures of ceratocystis ulmi.
One component of the material has been obtained in pure form and has proved to be a rather thermostable glycoprotein. In studies concerning variation within the elm disease fungus, ceratocystis ulmi, the production of a milky metabolite was observed on the surface of the medium in liquid culture. Ophiostoma ulmi formerly known as ceratocystis ulmi and ophiostoma novoulmi. Morphological characteristics of ceratocystis ulmi buism. Ophiostoma ulmi formerly known as ceratocystis ulmi and ophiostoma novo ulmi.
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