The detection of spongospora subterranea by bioassays, molecular and serological methods k. Spongospora adversely affects host plants cosmetic effects this effect manifests as reduced plant growth deleterious effects occur both in tuber resistant and tuber susceptible cultivars root galling and reduced root function are not related. Reaction of potato varieties to potato moptop virus. Documents about spongospora subterranea sponsu this website uses cookies our website uses cookies to ensure that we give you the best possible online experience. Zoosporangial root infection of tomato by spongospora. Of this group, spongospora subterranea causes major problems for the potato industry by causing powdery scab. This project has started in september 1995 and is still hosted by eth zurich spongospora. Spongospora subterranea sponsuworld distribution eppo. Powdery scab of potatooccurrence, life cycle and epidemiology. While every effort has been made to provide the most reliable and uptodate information available, ultimate legal requirements with respect to species are contained in. Finally we selected one antagonistic fungus that was identified as aspergillus versicolor as a. The plasmodial envelope, the interface between host and parasite, was found to.
Iftikhar et al characterization of spongospora subterranea f sp subterranea root hair and epidermal cells of roots under a stereomicroscope with 20fold magnificatiarn rating of root infection done on 04 scale of marz 1989, vvhsre 0 no sporangia, 1 only a fevv sporangia, several roots with sporangia, 3 sporangia regularly. This disease is caused by the obligate, plasmodiophorid pathogen spongospora subterranea wallroth lagerheim f. The knowledge can potentially have implications for resting spore. Potatoes disease caused by spongospora subterranea or.
Seedlings of the plants were grown in nutrient solutions and inoculated with spore balls ofs. Though this disease can reduce yield somewhat, the true economic effect is due to the unmarketable, scabbed appearance figure 1 as well as rejection of tubers as seed to prevent infestation of. Class project for pp 728, soilborne plant pathogens, fall 2012 introduction. Powdery scab ps, caused by spongospora subterranea f. Detection and eradication of spongospora subterranea in. Spongospora subterranea root infection assessed in two. It is caused by the cercozoan spongospora subterranea f.
Powdery scab on potato tubers is caused by the obligate soilborne biotroph spongospora subterranea and is known to cause substantial losses in. Resistance of potato to powdery scab spongospora subterranea under andean field conditions. Suppression of potato powdery scab caused by spongospora. Text is available under the creative commons attributionsharealike license. Detection in the soil and on tubers is based on the presence of sporosori, the resting spores of the pathogen.
Infection of potato by spongospora subterranea sciencedirect. Control of potato powdery scab spongospora subterranea in. The control of rhizoctonia in seed potatoes of lady rosetta is crucial. Parbery school of agriculture and forestry, university of melbourne, parkville 3052, australia evidence that potato tubers are susceptible to infection by spongospora subterranea only during lenticel formation and proliferation is presented and the capacity of apparently. Spongospora subterranea sponsuoverview eppo global database. It is a member of the family plasmodiophoraceae, the. Biology and chemical ecology of spongospora subterranea. Monitoring spongospora subterranea development in potato roots. A simple method for detecting spongospora subterranea in soil. Symptoms caused by pmtv vary greatly depending on the cultivar and environmental conditions harrison 1974. The detection of spongospora subterranea by bioassays. Duncan, scottish crop research institute, invergowrie, dundee dd2 5da, scotland, uk. Spongospora subterranea sponsudocuments eppo global. Potatoes disease caused by spongospora subterranea or streptomyces scabiei 2.
Pdf detection and quantification of spongospora subterranea. Powdery scab is caused by the soilborne slime mold, spongospora subterraneaf. Read galls on potato sprouts caused by spongospora subterranea, plant pathology on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Media in category spongospora subterranea the following 3 files are in this category, out of 3 total. Its success is attributed to the characteristics of its pathogen and features of its life cycle. Institute of plant protection,gansu academy of agricultural sciences,lanzhou 730070,gansu,china. The roots were microscopically examined for the presence of plasmodia or zoosporangia 14 days after inoculation. Pdf spongospora subterranea soil contamination and its. Global genetics and invasion history of the potato powdery. Continuing to use this website means you agree to our use of cookies. The fungi were screened in accordance with suppressiveness against root infection of spongospora subterranea and also against disease severity of powdery scab caused by this pathogen.
Seedlings of the plants were grown in nutrient solutions and inoculated with spore balls of s. Powdery scab spongospora subterranea of potatoes by. Hui nana,li jiping,wang li,ma yongqiang,li jianjun,zhou tianwang,li qingqing. In all experiments soil inoculum level of sss sporeballs. These spores can be detected through bioassays, pcr, and antibody methods. Epidemiology of spongospora subterranea, the cause of. Cookies are a set of data stored on a users device when the user browses a web site. Download help spongospora subterranea tsn 181449 taxonomy and nomenclature. The relationship between initial soil inoculum level of spongospora subterranea f. Ciupercile din clasa plasmodiophoromycetes sunt parazi. Other articles where spongospora subterranea is discussed. Lifecycle of powdery scab, spongospora subterranea.
Detection and quantification of spongospora subterranea in. However, resting spores must germinate and release zoospores the infective agents to cause infection. Epidemiology and control of spongospora subterranea f. Spongospora subterranea soil contamination and its relationship.
Welcome to the private spongospora competence center all about spongospora subterranea, member of the plasmodiophorid family. Spongospora subterranea and the two species of polymyxa are vectors for viruses that are pathogenic on a variety of crop plants. Protection research centre, lincoln university, lincoln, new zealand spongospora subterranea root infection reduces potato plant growth and tuber yields. Powdery scab, caused by the obligate plasmodiophorale fungus spongospora subterranea, has become an important disease for potato production worldwide. They are sent to a computer by website operators or third parties. Abstract powdery scab of potato, caused by the zoosporic pathogen spongospora subterranea f. The plasmodiophorida phytomyxea, rhizaria are a group of protist that infect plants. Pdf powdery scab, a root and tuber disease caused by the pathogen. View sum of plos and pubmed central page views and downloads. Presence of spongospora subterranea on swab samples taken in minituber production tunnels before corrective measures were taken. Although powdery scab disease of potatoes has been known and studied for nearly one hundred years, zoosporangia have never been described in. This study was performed to determine the host range ofspongospora subterranea f. Pp1 efficacy evaluation of plant protection products. View enhanced pdf access article on wiley online library html view download pdf for offline viewing.
File name files of type experiment file as template international units no international units spongospora subterranea f. A specific primer pair and a fluorogenic taqman probe were designed to perform a quantitative assay for the detection of s. The photo of the affected potato tuber by spongospora subterranea belongs to j. Powdery scab of potatoes publications ndsu agriculture. The manner of infection of tubers of the potato solatium tuberosum by spongospora subterranea seems never to have been observed. Infection by spongospora subterranea of roots of two potato solanum tuberosum cultivars, either very resistant or very susceptible to powdery scab on their tubers, was studied in a glasshouse experiment. Monitoring spongospora subterranea development in potato. Powdery scab is caused by the pathogen spongospora subterranea f. Resting spores are important for the spread and survival of spongospora subterranea, the causative agent of potato powdery scab and root disease. Home page symptoms pitted or raised symptoms powdery scab. We do not use these to store personal information about you. Three diseases of potato caused by spongospora subterranea.
Global genetic characterisation of the powdery scab pathogen introduction powdery scab is one of the most serious diseases of potatoes wherever intensive potato cropping is carried out. The period of susceptibility of potato tubers to powdery scab spongospora subterranea was studied by inoculating potato plants with spores, or by watering plants in. Experiments under greenhouse condi tions were carried out at two locations, a cip greenhouse. In the worst years, up to a third of the crop can be affected. Pdf detection and eradication of spongospora subterranea in. Though this disease can reduce yield somewhat, the true economic effect is due to the unmarketable, scabbed appearance figure 1 as well as rejection of tubers as seed to prevent. The data is in a file containing an id number, the name of the server which deposited it and, in some cases, an expiry date. The intention was to establish a site for information and orientation on different aspects of the pathogen spongospora subterranea f. The most common symptoms of primary infection are rust or blackcolored lines, arcs, and rings on the surface of the tubers. Understanding of the germination process and factors is, therefore, important. Pacific pests and pathogens fact sheets potato powdery scab 294 common name powdery scab scientific name spongospora subterranea f. Ultrastructural details of sporangial plasmodia and zoosporangia of spongospora subterranea f. We isolated 508 soil fungi from potato root cultivated in the suspension of soils from 36 potato fields in hokkaido. Spongospora subterranea is an obligate biotroph and therefore requires a living host and cannot be cultured in vitro.
Common name isynonym iother names i spongospora subterranea subsp. Symptoms of powdery scab include small lesions in the early stages of the disease, progressing to raised pustules containing a powdery mass. Spongospora subterranea an overview sciencedirect topics. Plants grown in sandnutrient solution culture were inoculated with s. Pmtv, vectored by powdery scab spongospora subterranea, has been a feature of scandinavian saturna production. Spongospora subterranea is the causal agent of powdery scab on potato. The pathogen has a resistant resting stage that enables it to survive in the soil for many years. This study was performed to determine the host range of spongospora subterranea f. Cookies are small text files that contain a string of characters and uniquely identifies a browser. Draft genome resource for the potato powdery scab pathogen. Project report epidemiology, autecology and control of spongospora subterranea, cause of potato powdery scab ref. Transactions of the british mycological society, 41. A sensitive realtime polymerase chain reaction pcr assay was developed for the quantification of spongospora subterranea, the cause of powdery scab and root galling in potato, and the vector of potato mop top virus. However, it is not a legal authority for statutory or regulatory purposes.
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